NOTICE When handling supplemental restraint system components (removal, installation or inspection, etc.), always follow the direction given in the repair manuals listed above to prevent accidents and supplemental restraint system malfunction. 2001 TOYOTA TACOMA (EWD440U) 1 FOREWORD This wiring diagram manual has been prepared to provide information on the electrical system of the 2001 TOYOTA TACOMA. Applicable models: VZN150,170,195 Series RZN140,150,161, RZN171,191,196 Series For service specifications and repair procedures of the above models other than those listed in this manual, refer to the following manuals; Manual Name Pub. No. Y 2001 TOYOTA TACOMA Repair Manual Volume 1 Volume 2 Y 2001 TOYOTA New Car Features RM835U1 RM835U2 NCF191U All information in this manual is based on the latest product information at the time of publication. However, specifications and procedures are subject to change without notice.
271
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Transcript
NOTICEWhen handling supplemental restraint system components (removal,installation or inspection, etc.), always follow the direction given in the repairmanuals listed above to prevent accidents and supplemental restraintsystem malfunction.
2001 TOYOTA TACOMA (EWD440U)
1
FOREWORD
This wiring diagram manual has been prepared to provide
information on the electrical system of the 2001 TOYOTA
TACOMA.
Applicable models: VZN150,170,195 Series
RZN140,150,161,
RZN171,191,196 Series
For service specifications and repair procedures of the above
models other than those listed in this manual, refer to the
following manuals;
Manual Name Pub. No. 2001 TOYOTA TACOMA
Repair Manual Volume 1Volume 2
2001 TOYOTA New Car Features
RM835U1RM835U2
NCF191U
All information in this manual is based on the latest product
information at the time of publication. However, specifications
and procedures are subject to change without notice.
2001 TOYOTA TACOMA (EWD440U)
2
A INTRODUCTION
This manual consists of the following 13 sections:
No. Section Description
AINDEX Index of the contents of this manual.
AINTRODUCTION Brief explanation of each section.
B HOW TO USE THISMANUAL Instructions on how to use this manual.
C TROUBLE-SHOOTING Describes the basic inspection procedures for electrical circuits.
D ABBREVIATIONS Defines the abbreviations used in this manual.
EGLOSSARY OFTERMS ANDSYMBOLS
Defines the symbols and functions of major parts.
F RELAY LOCATIONS Shows position of the Electronic Control Unit, Relays, Relay Block, etc.This section is closely related to the system circuit.
G ELECTRICALWIRING ROUTING
Describes position of Parts Connectors, Splice points, Ground points, etc.This section is closely related to the system circuit.
INDEX Index of the system circuits.
HSYSTEM CIRCUITS
Electrical circuits of each system are shown from the power supply through groundpoints. Wiring connections and their positions are shown and classified by codeaccording to the connection method. (Refer to the section, ”How to use this manual”).The ”System Outline” and ”Service Hints” useful for troubleshooting are also containedin this section.
I GROUND POINT Shows ground positions of all parts described in this manual.
J POWER SOURCE(Current Flow Chart) Describes power distribution from the power supply to various electrical loads.
K CONNECTOR LIST Describes the form of the connectors for the parts appeared in this book.This section is closely related to the system circuit.
L PART NUMBER OFCONNECTORS Indicates the part number of the connectors used in this manual.
MOVERALLELECTRICALWIRING DIAGRAM
Provides circuit diagrams showing the circuit connections.
2001 TOYOTA TACOMA (EWD440U)
3
HOW TO USE THIS MANUAL B
This manual provides information on the electrical circuits installed on vehicles bydividing them into a circuit for each system.
The actual wiring of each system circuit is shown from the point where the powersource is received from the battery as far as each ground point. (All circuitdiagrams are shown with the switches in the OFF position.)
When troubleshooting any problem, first understand the operation of the circuitwhere the problem was detected (see System Circuit section), the power sourcesupplying power to that circuit (see Power Source section), and the ground points(see Ground Point section). See the System Outline to understand the circuitoperation.
When the circuit operation is understood, begin troubleshooting of the problemcircuit to isolate the cause. Use Relay Location and Electrical Wiring Routingsections to find each part, junction block and wiring harness connectors, wiringharness and wiring harness connectors, splice points, and ground points of eachsystem circuit. Internal wiring for each junction block is also provided for betterunderstanding of connection within a junction block.Wiring related to each system is indicated in each system circuit by arrows(from__, to__). When overall connections are required, see the Overall ElectricalWiring Diagram at the end of this manual.
@@@@@@@@@@@@@@@@@@@@@@@@@@@@
ÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀÀ
W-R
7. 5AGAUGE
1
2
3
4
487
2 1 11
13
4
1
2
3
4
1
2
B18
BL
FROM POWER SOURCE SYSTEM (SEE PAGE 66)
R-L
R-L
G
W-B
W-B
W-B
W-B
W-B
W-B
Y-G
R
L 4
H17
R 6
DELAYCIRCUIT
S 6
B18
3
4
R 7
BV11
G-W
G-R
G-R
G-R
G-R
G-W
G-W
(W/G
)
(S/D
)(S
/D)
C 7
(SHIELDED)
BV11
I 5
LL
STOP LIGHT
15
7
TO ABS ECU
BO
50
15ASTOP
IB
IB
REAR LIGHTSWARNING LIGHT[COMB. METER]
3C
3C
IE114
STOP LIGHT SW
ST
OP
LIG
HT
RH
[RE
AR
CO
MB
. LI
GH
T R
H]
ST
OP
LIG
HT
RH
[RE
AR
CO
MB
. LI
GH
T L
H]
HIGH MOUNTEDSTOP LIGHT
[A]
[B]
[I]
[D]
[F]
[H]
[E]
[J]
[M]
[N]
[K]
[L]
[G]
[C]
LIGHT FAILURE SENSOR
2001 TOYOTA TACOMA (EWD440U)
4
B HOW TO USE THIS MANUAL
∗ The system shown here is an EXAMPLE ONLY. It is different to the actualcircuit shown in the SYSTEM CIRCUITS SECTION.
2001 TOYOTA TACOMA (EWD440U)
5
B
[A] : System Title
[B] : Indicates a Relay Block. No shading is used andonly the Relay Block No. is shown to distinguish itfrom the J/BExample: Indicates Relay Block No.1
[C] : ( ) is used to indicate different wiring andconnector, etc. when the vehicle model, enginetype, or specification is different.
[D] : Indicates related system.
[E] : Indicates the wiring harness and wiring harnessconnector. The wiring harness with male terminal isshown with arrows ( ).Outside numerals are pin numbers.
Female Male ( )
The first letter of the code for each wiring harnessand wiring harness connector(s) indicates thecomponent’s location, e.g, ”E” for the EngineCompartment, ”I” for the Instrument Panel andSurrounding area, and ”B” for the Body andSurrounding area.
When more than one code has the first and secondletters in common, followed by numbers (e.g, IH1,IH2), this indicates the same type of wiring harnessand wiring harness connector.
[F] : Represents a part (all parts are shown in sky blue).The code is the same as the code used in partsposition.
[G] : Junction Block (The number in the circle is the J/BNo. and the connector code is shown beside it).Junction Blocks are shaded to clearly separatethem from other parts.
3C indicatesthat it is insideJunction BlockNo.3
Example:
[H] : When 2 parts both use one connector in common,the parts connector name used in the wire routingsection is shown in square brackets [ ].
[I] : Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black W = White BR = Brown
L = Blue V = Violet SB = Sky Blue
R = Red G = Green LG = Light Green
P = Pink Y = Yellow GR = Gray
O = Orange
The first letter indicates the basic wire color and thesecond letter indicates the color of the stripe.
Example: L - Y
L(Blue)
Y(Yellow)
[J] : Indicates a wiring Splice Point (Codes are ”E” for theEngine Room, ”I” for the Instrument Panel, and ”B”for the Body).
The Location of splice Point I 5 is indicated by theshaded section.
[K] : Indicates a shielded cable.
[L] : Indicates the pin number of the connector.The numbering system is different for female andmale connectors.
Example: Numbered in orderfrom upper left tolower right
Numbered in orderfrom upper right tolower left
Female Male
[M] : Indicates a ground point.
The first letter of the code for each ground point(s)indicates the component’s location, e.g, ”E” for theEngine Compartment, ”I” for the Instrument Paneland Surrounding area, and ”B” for the Body andSurrounding area.
[N] : Page No.
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
[V]
2001 TOYOTA TACOMA (EWD440U)
6
B HOW TO USE THIS MANUAL
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flowsthrough the rear lights warning light to TERMINAL 4 of the light failure sensor.
STOP LIGHT DISCONNECTION WARNINGWhen the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the currentflowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects thedisconnection and the warning circuit of the light failure sensor is activated.As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lightswarning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warningcircuit on and holds the warning light on until the ignition SW is turned off.
S6 STOP LIGHT SW2-1 : Closed with the brake pedal depressed
L4 LIGHT FAILURE SENSOR1, 2, 7-GROUND : Approx. 12 volts with the stop light SW on
4, 8-GROUND : Approx. 12 volts with the ignition SW at ON position11-GROUND : Always continuity
: PARTS LOCATION
Code See Page Code See Page Code See Page
C7 34 L4 36 R7 37
H17 36 R6 37 S6 35
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
1 18 R/B No.1 (Instrument Panel Left)
@@@@@@@@@
ÀÀÀÀÀÀÀÀÀ
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I5 44 Cowl Wire B18 50 Luggage Room Wire
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
7
B
[O] : Explains the system outline.
[P] : Indicates values or explains the function for reference during troubleshooting.
[Q] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit.
Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual.∗ The letter in the code is from the first letter of the part, and the number indicates its order in parts
starting with that letter.Example : L 4 Á
ÁParts is 4th in orderLight Failure Sensor
[R] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.
Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrumentpanel.
[S] : Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit.
Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of thismanual, and is installed on the instrument panel left side.
[T] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiringharness is shown first, followed by the male wiring harness).
Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male). It is described onpage 42 of this manual, and is installed on the left side kick panel.
[U] : Indicates the reference page showing the position of the ground points on the vehicle.
Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center.
[V] : Indicates the reference page showing the position of the splice points on the vehicle.
Example : Splice point ”I5” is on the Cowl Wire Harness and is described on page 44 of this manual.
2001 TOYOTA TACOMA (EWD440U)
8
B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. Whentroubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identifythe problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also bechecked this way.
I GROUND POINTFAN MAIN RELAY
FAN MAIN RELAY
A/C FAN RELAY NO.2
A/C FAN RELAY NO.3
RADIATOR FAN MOTOR
RETRACT CONTROLRELAY
RETRACT MOTOR RH
RETRACT MOTOR LH
FRONT TURN SIGNAL LIGHT RH
PARKING LIGHT RH
FRONT TURN SIGNALLIGHT LH
PARKING LIGHT LH
DOOR LOCK CONTROLSW RH
DOOR KEY LOCKSW RH
DOOR LOCK MOTORRH
BLOWER RESISTOR
A/C AMPLIFIER
RADIO AND PLAYER
HEATER RELAY
AUTO ANTENNAMOTOR
BLOWER SW
PARKING BRAKE SW
COMBINATION METER
HORN SW [COMB. SW]
TURN SIGNAL FLASHER
DOOR KEY LOCK SW LH
DOOR LOCK MOTOR LH
FUEL CONTROL SW
WOOFER AMPLIFIER
COMBINATION METER
COMBINATION METER
FUEL SENDER
CIGARETTE LIGHTER
O/D MAIN SW
CLOCK
5
5
5
5
4
4
4
4
4BA15
IB18
EA210
3E5
3E6
3G13
3F3
3D1
3B7
ID115
IC33
IA12
E 3
A
AA
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B W-B
W-B
BR
W-B
BR BR
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
BR
W-B
BRBR
BR
W-B
W-B
W-B
W-B
W-B
BR
W-B (4A-GZE)
W-B
A
A
A
I 6
I 6
I 2
I 2
I 2
B 5I 5
I 5
I 5
B 5
B 5
B 5
I 5
I 5
I 3I 3
E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6E 4
E 4
B 4
EA
I 4
B 4
B 4
I 4 I 8
IB IC
3C7
4
JUNCTIONCONNECTOR
J 1
4
DOOR LOCK CONTROLRELAY
ELECTRICAL IDLE−UPCUT RELAY (M/T)
FRONT SIDE MARKERLIGHT RH
FRONT SIDE MARKERLIGHT LH
BRAKE FLUID LEVELWARNING SW
UNLOCK WARNINGSW
WIPER AND WASHERSW [COMB. SW]
LIGHT CONTROL SW[COMB. SW]
HEATER CONTROLASSEMBLY
HEATER SERVOMOTOR AMPLIFIER
DIMMER SW[COMB. SW]
CRUISE CONTROLMIRROR SW
REAR WINDOWDEFOGGER SW
POWER WINDOWMASTER SW
POWER WINDOWCONTROL RELAY
DOOR LOCK CONTROL SW
REMOTE CONTROLMIRROR SW
∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
2001 TOYOTA TACOMA (EWD440U)
9
B
The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers)transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each systemare explained. Since all System Circuit diagrams start from the power source, the power source system must be fullyunderstood.
Theft Deterrent and Door Lock Control
J POWER SOURCE (Current Flow Chart)
11
1
EA11EA23
7
EB16
E 6
E 7 I 2 I 2
I 2
E 7
E 7
E 7
2
1
1
2
2
2
2
2
B
B
WW
BB
BB
B
W-B
B
B
B
B-O
B-W
W-B
B-W
STARTER RELAY
INJECTION RELAY
15A HAZ-RADIO
7.5A AM2
50A MAIN
1.25B FL MAIN
BATTERY
W W W
W
W
W
R
W-L
WW
G-W
G
15A TAIL
20A DEFOG
15A RAD CIG
TAILRELAY
7.5A DOME
40A DOOR LOCK CB
21
12
48
23
34
G
W-R
P-L
B-Y
B-Y
W-R
AM
2IG
2
AC
C
IG1
AM
1W
W
W-R
W
W
W-B
2 1
1
1
1
1
2
2
2
2
3
4
3
4
1
2
1
2
2
1
11
1
IGNITION SWI 8
Battery 30A AM2 2
Starter S 220A RADIO NO.1
10A HORN
15A EFI
7.5A DOMEShort Pin
10A HAZARD
The chart below shows the route by which current flows from the battery to each electrical source(Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
Engine Room R/B (See Page 20)
ABSABS and Traction ControlCruise ControlElectronically Controlled Transmission and A/T IndicatorMultiplex Communication System
Cigarette Lighter and Clock
Key Reminder and Seat Belt Warning
STOP
Fuse Page194
214
112
System
DOME
20A
10A
Combination MeterHeadlightInterior Light
2
2
6100A ALT
EB1
POWER SOURCELight Auto Turn Off
187180166210
230
122
10A ECU-B
560A ABS
2
6Fusible Link Block
2
∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
BLACK
[D]
K CONNECTOR LIST
J4 K1 K2 L1
L2 L3 L4 M1 M2 M3
M4 N1 N2 O1 O2
DARK GRAY
GRAY
DARK GRAYBLACKGRAYGRAY
A B BA A B C C C
D DD D
AA
AA
AAA A 1
1 2 1 2
1 12 1
2
1 2 36 7 8 9 101112
4 5
71 23 45 6 8
4321
1 2 3 2 3 48 9 105 6
17
1 2 1 1
[A]
[C]
[B]J3
1 2 1 2
6 7 8
1 2A
A
A
AA AA B BA A B C C C
D DD D
I14 I15 I16 J1 J2DARK GRAY GRAY BLACK
2001 TOYOTA TACOMA (EWD440U)
10
B HOW TO USE THIS MANUAL
[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)
[B] : Junction ConnectorIndicates a connector which is connected to a short terminal.
Junction Connector
Short TerminalSame Color
Junction connector in this manual include a short terminal which isconnected to a number of wire harnesses. Always performinspection with the short terminal installed. (When installing thewire harnesses, the harnesses can be connected to any positionwithin the short terminal grouping. Accordingly, in other vehicles,the same position in the short terminal may be connected to a wireharness from a different part.)Wire harness sharing the same short terminal grouping have thesame color.
[C] : Parts CodeThe first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts whichstart with the same letter.
[D] : Connector ColorConnectors not indicated are milky white in color.
2001 TOYOTA TACOMA (EWD440U)
11
B
[A] : Part Code
[B] : Part Name
[C] : Part NumberToyota Part Number are indicated.
Not all of the above part numbers of the connector are established for the supply. In case of ordering a connectoror terminal with wire, please confirm in advance if there is supply for it using “Parts Catalog News” (published byParts Engineering Administration Dept.).
A 5ÁÁÁÁ
90980-11194
L PART NUMBER OF CONNECTORSCode Part Name Part Number Code Part Name Part Number
(a) Establish conditions in which voltage is present at the checkpoint.Example:
[A] - Ignition SW on[B] - Ignition SW and SW 1 on[C] - Ignition SW, SW 1 and Relay on (SW 2 off)
(b) Using a voltmeter, connect the negative lead to a good groundpoint or negative battery terminal, and the positive lead to theconnector or component terminal.This check can be done with a test light instead of a voltmeter.
CONTINUITY AND RESISTANCE CHECK
(a) Disconnect the battery terminal or wire so there is no voltagebetween the check points.
(b) Contact the two leads of an ohmmeter to each of the checkpoints.
If the circuit has diodes, reverse the two leads and checkagain.When contacting the negative lead to the diode positive sideand the positive lead to the negative side, there should becontinuity.When contacting the two leads in reverse, there should be nocontinuity.
(c) Use a volt/ohmmeter with high impedance (10 kΩ/Vminimum) for troubleshooting of the electrical circuit.
To Ignition SWIG Terminal
Test Light
RelayLight
SW 2 Solenoid
Disconnect
Short [A]
DisconnectDisconnect
SW 1
Fuse Case
Short [B]
Short [C]
Pull Up
Press Down Press Down
Pull Up
2001 TOYOTA TACOMA (EWD440U)
13
C
FINDING A SHORT CIRCUIT
(a) Remove the blown fuse and disconnect all loads of the fuse.(b) Connect a test light in place of the fuse.(c) Establish conditions in which the test light comes on.
Example:[A] - Ignition SW on[B] - Ignition SW and SW 1 on[C] - Ignition SW, SW 1 and Relay on (Connect the
Relay) and SW 2 off (or Disconnect SW 2)
(d) Disconnect and reconnect the connectors while watching thetest light.The short lies between the connector where the test lightstays lit and the connector where the light goes out.
(e) Find the exact location of the short by lightly shaking theproblem wire along the body.
CAUTION:(a) Do not open the cover or the case of the ECU unless
absolutely necessary. (If the IC terminals are touched,the IC may be destroyed by static electricity.)
(b) When replacing the internal mechanism (ECU part) ofthe digital meter, be careful that no part of your body orclothing comes in contact with the terminals of leadsfrom the IC, etc. of the replacement part (spare part).
DISCONNECTION OF MALE AND FEMALECONNECTORS
To pull apart the connectors, pull on the connector itself, notthe wire harness.
HINT : Check to see what kind of connector you aredisconnecting before pulling apart.
10
3
0.21
1
(mm)
Reference:
ToolUpExample:(Case 1)
Terminal Retainer
Terminal Retainer
[Retainer at Full Lock Position]
[Retainer at Temporary Lock Position]
StopperTerminalRetainer
SecondaryLocking Device
Example:(Case 2)
2001 TOYOTA TACOMA (EWD440U)
14
C TROUBLESHOOTING
HOW TO REPLACE TERMINAL(with terminal retainer or secondary locking device)
1. PREPARE THE SPECIAL TOOL
HINT : To remove the terminal from the connector, pleaseconstruct and use the special tool or like object shown onthe left.
2. DISCONNECT CONNECTOR
3. DISENGAGE THE SECONDARY LOCKING DEVICE OR
TERMINAL RETAINER.
(a) Locking device must be disengaged before the terminallocking clip can be released and the terminal removed fromthe connector.
(b) Use a special tool or the terminal pick to unlock the secondarylocking device or terminal retainer.
NOTICE:Do not remove the terminal retainer from connector body.
[A] For Non-Waterproof Type Connector
HINT : The needle insertion position varies according to the
connector’s shape (number of terminals etc.), so
check the position before inserting it.
”Case 1”
Raise the terminal retainer up to the temporary lock
position.
”Case 2”
Open the secondary locking device.
ToolTab
Tab
TerminalRetainer
Access Hole( Mark)
Tool
Tool
[Female]
Example:
[Male]
(Case 1)
[Male] [Female]
Retainerat Full Lock Position
Retainerat Temporary Lock Position
Terminal Retainer
[Male] Press Down [Female]Press Down
ToolTool
Example:(Case 2)
2001 TOYOTA TACOMA (EWD440U)
15
C
[B] For Waterproof Type Connector
HINT : Terminal retainer color is differentaccording to connector body.
Example:Terminal Retainer : Connector BodyBlack or White : GrayBlack or White : Dark GrayGray or White : Black
”Case 1”Type where terminal retainer is pulledup to the temporary lock position (PullType).
Insert the special tool into the terminalretainer access hole (Mark) and pullthe terminal retainer up to thetemporary lock position.
HINT : The needle insertion position variesaccording to the connector’s shape(Number of terminals etc.), so checkthe position before inserting it.
”Case 2”Type which cannot be pulled as far asPower Lock insert the tool straight intothe access hole of terminal retainer asshown.
Retainer atFull Lock Position
[Male] [Female]
Retainer atTemporary Lock Position
Locking Lug
Tool
2001 TOYOTA TACOMA (EWD440U)
16
C TROUBLESHOOTING
Push the terminal retainer down to the temporary lock position.
(c) Release the locking lug from terminal and pull the terminal outfrom rear.
4. INSTALL TERMINAL TO CONNECTOR
(a) Insert the terminal.HINT:1. Make sure the terminal is positioned correctly.2. Insert the terminal until the locking lug locks firmly.3. Insert the terminal with terminal retainer in the temporary lock
position.
(b) Push the secondary locking device or terminal retainer in tothe full lock position.
5. CONNECT CONNECTOR
∗ The titles given inside the components are the names of the terminals (terminal codes) and are not treated as beingabbreviations.
2001 TOYOTA TACOMA (EWD440U)
17
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
ABS = Anti-Lock Brake System
A/C = Air Conditioning
ADD = Automatic Disconnecting Differential
A/T = Automatic Transmission
COMB. = Combination
DIFF. = Differential
ECU = Electronic Control Unit
EGR = Exhaust Gas Recirculation
ESA = Electronic Spark Advance
EVAP = Evaporative Emission
INT = Intermittent
J/B = Junction Block
LH = Left-Hand
M/T = Manual Transmission
O/D = Overdrive
R/B = Relay Block
RH = Right-Hand
SFI = Sequential Multiport Fuel Injection
SPEC. = Specification
SRS = Supplemental Restraint System
SW = Switch
TEMP. = Temperature
VSV = Vacuum Switching Valve
w/ = With
w/o = Without
2WD = Two Wheel Drive
4WD = Four Wheel Drive
2001 TOYOTA TACOMA (EWD440U)
18
E GLOSSARY OF TERMS AND SYMBOLS
BATTERYStores chemical energy andconverts it into electrical energy.Provides DC current for the auto’svarious electrical circuits.
GROUNDThe point at which wiring attaches tothe Body, thereby providing a returnpath for an electrical circuit; without aground, current cannot flow.
CAPACITOR (Condenser)A small holding unit for temporarystorage of electrical voltage.
HEADLIGHTSCurrent flow causes a headlightfilament to heat up and emit light. Aheadlight may have either a single(1) filament or a double (2) filament
1. SINGLE FILAMENT
CIGARETTE LIGHTERAn electric resistance heatingelement.
2. DOUBLE FILAMENT
CIRCUIT BREAKERBasically a reusable fuse, a circuitbreaker will heat and open if toomuch current flows through it.Some units automatically reset whencool, others must be manually reset.
HORNAn electric device which sounds aloud audible signal.
DIODEA semiconductor which allowscurrent flow in only one direction.
IGNITION COILConverts low-voltage DC currentinto high-voltage ignition current forfiring the spark plugs.
DIODE, ZENERA diode which allows current flow in onedirection but blocks reverse flow only upto a specific voltage. Above that potential,it passes the excess voltage. This acts asa simple voltage regulator.
LIGHTCurrent flow through a filamentcauses the filament to heat up andemit light.
PHOTODIODEThe photodiode is a semiconductorwhich controls the current flowaccording to the amount of light.
LED (LIGHT EMITTING DIODE)Upon current flow, these diodes emitlight without producing the heat of acomparable light.
DISTRIBUTOR, IIAChannels high-voltage current fromthe ignition coil to the individualspark plugs.
METER, ANALOGCurrent flow activates a magneticcoil which causes a needle to move,thereby providing a relative displayagainst a background calibration.
FUSEA thin metal strip which burns throughwhen too much current flows through it,thereby stopping current flow andprotecting a circuit from damage.
FUSIBLE LINK
METER, DIGITALCurrent flow activates one or manyLED’s, LCD’s, or fluorescentdisplays, which provide a relative ordigital display.
FUEL
FUSIBLE LINKA heavy-gauge wire placed in highamperage circuits which burns through onoverloads, thereby protecting the circuit.The numbers indicate the crosssectionsurface area of the wires.
(for Medium Current Fuse)
(for High Current Fuse or Fusible Link)
MOTORA power unit which convertselectrical energy into mechanicalenergy, especially rotary motion.
M
2001 TOYOTA TACOMA (EWD440U)
19
E
RELAYBasically, an electrically operatedswitch which may be normallyclosed (1) or open (2).Current flow through a small coilcreates a magnetic field which eitheropens or closes an attached switch.
1. NORMALLY CLOSED
2. NORMALLY OPEN
SWITCH, MANUALOpens and closesi it th b
SPEAKERAn electromechanical device whichcreates sound waves from currentflow.
RELAY, DOUBLE THROWA relay which passes currentthrough one set of contacts or theother.
RESISTORAn electrical component with a fixedresistance, placed in a circuit toreduce voltage to a specific value.
SWITCH, DOUBLE THROWA switch which continuously passescurrent through one set of contactsor the other.
RESISTOR, TAPPEDA resistor which supplies two ormore different non adjustableresistance values.
SWITCH, IGNITIONA key operated switch with severalpositions which allows variouscircuits, particularly the primaryignition circuit, to becomeoperational.
RESISTOR, VARIABLE or RHEOSTATA controllable resistor with a variablerate of resistance.Also called a potentiometer orrheostat.
SENSOR (Thermistor)A resistor which varies its resistancewith temperature.
SWITCH, WIPER PARKAutomatically returns wipers to thestop position when the wiper switchis turned off.
(Reed Switch Type)
SENSOR, SPEEDUses magnetic impulses to openand close a switch to create a signalfor activation of other components.
TRANSISTORA solidstate device typically used asan electronic relay; stops or passescurrent depending on the voltageapplied at ”base”.
SHORT PINUsed to provide an unbrokenconnection within a junction block.
WIRESWires are always drawn asstraight lines on wiringdiagrams.Crossed wires (1) without ablack dot at the junction are
t j i d
(1) NOT CONNECTED
SOLENOIDAn electromagnetic coil which formsa magnetic field when current flows,to move a plunger, etc.
jnot joined;crossed wires (2) with ablack dot or octagonal ( )mark at the junction arespliced (joined)connections.
(2) SPLICED
2001 TOYOTA TACOMA (EWD440U)
20
F RELAY LOCATIONS
[Engine Compartment]
[Instrument Panel]
2001 TOYOTA TACOMA (EWD440U)
21
F
2 : R/B No.2 Engine Compartment Left (See Page 20)
2001 TOYOTA TACOMA (EWD440U)
22
F RELAY LOCATIONS
: J/B No.1 Lower Finish Panel (See Page 20)
2001 TOYOTA TACOMA (EWD440U)
23
F
2001 TOYOTA TACOMA (EWD440U)
24
F RELAY LOCATIONS
[J/B No.1 Inner Circuit]
2001 TOYOTA TACOMA (EWD440U)
25
F
2001 TOYOTA TACOMA (EWD440U)
26
F RELAY LOCATIONS
: J/B No.3 Behind the Instrument Panel Left (See Page 20)
2001 TOYOTA TACOMA (EWD440U)
27
F
[J/B No.3 Inner Circuit]
2001 TOYOTA TACOMA (EWD440U)
28
F RELAY LOCATIONS
: J/B No.3 Behind the Instrument Panel Center (See Page 20)
2001 TOYOTA TACOMA (EWD440U)
29
F
[J/B No.3 Inner Circuit]
2001 TOYOTA TACOMA (EWD440U)
30
G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment[5VZ-FE]
A 5 A/C Magnetic ClutchA 7 A/T Oil Temp. SensorA22 ABS Actuator with ECUA23 Air Fuel Ratio Sensor (Bank 1 Sensor 1)A24 ADD Actuator
F 1 Front ABS Speed Sensor LHF 2 Front ABS Speed Sensor RHF 3 Front Turn Signal Light LHF 4 Front Turn Signal Light RHF 9 Front Airbag Sensor LHF 10 Front Airbag Sensor RH
C 1 Camshaft Position SensorC 2 Crankshaft Position SensorC 3 Cruise Control Actuator
D 1 Data Link Connector 1D 3 Detection SW (Transfer L4 Position)D 4 Detection SW (Transfer Neutral Position)D 5 Detection SW (Transfer 4WD Position)
E 1 EGR Gas Temp. SensorE 2 Electronically Controlled Transmission SolenoidE 3 Engine Coolant Temp. Sensor
F 1 Front ABS Speed Sensor LHF 2 Front ABS Speed Sensor RHF 3 Front Turn Signal Light LHF 4 Front Turn Signal Light RHF 9 Front Airbag Sensor LHF 10 Front Airbag Sensor RH
W 1 Washer Motor and Washer Level Sensor (Cold Area Spec.) or Washer Motor (Except Cold Area Spec.)
W 2 Water Temp. SenderW 3 Wiper Motor
2001 TOYOTA TACOMA (EWD440U)
34
G ELECTRICAL WIRING ROUTING
Position of Parts in Instrument Panel
A 9 ABS Deceleration SensorA13 A/C Dual Pressure SWA15 A/C ThermistorA18 Airbag Squib (Steering Wheel Pad)A19 Ashtray IlluminationA21 Airbag Squib (Front Passenger Airbag Assembly)A25 A/C Control AssemblyA26 Air Inlet Control Servo Motor A27 Air Mix Control Servo MotorA28 Air Vent Mode Control Servo Motor
C10 Combination MeterC12 Combination MeterC13 Combination MeterC14 Combination SWC15 Combination SWC16 Cruise Control Clutch SWC17 Cruise Control ECUC19 Combination SWC20 Center Airbag Sensor AssemblyC21 Center Airbag Sensor AssemblyC22 Center Airbag Sensor Assembly
D 7 Data Link Connector 3D 8 Daytime Running Light Relay (Main)D 9 Daytime Running Light Relay No.4D13 Diode (Daytime Running Light System)D15 Door Courtesy SW Front LHD16 Door Courtesy SW Front RHD25 Diode (A/T)
2001 TOYOTA TACOMA (EWD440U)
35
G
Position of Parts in Instrument Panel
E 4 Electronically Controlled Transmission Pattern Select SW
E 5 Engine Control ModuleE 6 Engine Control ModuleE 7 Engine Control ModuleE 8 Engine Control Module
P 5 Personal LightP 6 Power Window Control SW Front RHP 7 Power Window Master SW and
Door Lock Control SW LHP 8 Power Window Motor Front LH
P 9 Power Window Motor Front RHP21 Pretensioner LHP22 Pretensioner RHP25 Power Window Control SW Rear LHP26 Power Window Control SW Rear RHP27 Power Window Motor Rear LHP28 Power Window Motor Rear RH
R 6 Rear Combination Light LHR 7 Rear Combination Light RHR 8 Remote Control Mirror LHR 9 Remote Control Mirror RHR10 Remote Control Mirror SWR11 Rear ABS Speed Sensor LHR12 Rear ABS Speed Sensor RHR13 Rear Diff. Lock Detection SWR14 Rear Diff. Lock Motor
S 6 Speaker (Front Door LH)S 7 Speaker (Front Door RH)S 8 Speaker (Rear LH)S 9 Speaker (Rear RH)
T 5 Tweeter LHT 6 Tweeter RH
2001 TOYOTA TACOMA (EWD440U)
37
G
Position of Parts in Body[Except Double Cab]
B 6 Buckle SW LH
D20 Door Lock Control SW RHD21 Door Lock Motor, Door Unlock Detection SW and
Door Key Lock and Unlock SW Front LHD22 Door Lock Motor, Door Unlock Detection SW and
P 5 Personal LightP 6 Power Window Control SW Front RHP 7 Power Window Master SW and
Door Lock Control SW LHP 8 Power Window Motor Front LH
P 9 Power Window Motor Front RHP21 Pretensioner LHP22 Pretensioner RH
R 6 Rear Combination Light LHR 7 Rear Combination Light RHR 8 Remote Control Mirror LHR 9 Remote Control Mirror RHR10 Remote Control Mirror SWR11 Rear ABS Speed Sensor LHR12 Rear ABS Speed Sensor RHR13 Rear Diff. Lock Detection SWR14 Rear Diff. Lock Motor
S 6 Speaker (Front Door LH)S 7 Speaker (Front Door RH)S 8 Speaker (Rear LH)S 9 Speaker (Rear RH)
T 5 Tweeter LHT 6 Tweeter RH
2001 TOYOTA TACOMA (EWD440U)
38
G ELECTRICAL WIRING ROUTING
Position of Parts in Seat
P23 Power Seat Motor (Lumbar Support)P24 Power Seat SW (Lumbar Support)
2001 TOYOTA TACOMA (EWD440U)
39
MEMO
2001 TOYOTA TACOMA (EWD440U)
40
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points
[5VZ-FE]
: Location of Splice Points
2001 TOYOTA TACOMA (EWD440U)
41
G
Connector Joining Wire Harness and Wire Harness
1 2
3 4
2 1
341 2 3
654
3 2 1456 3
1 2
3
12
1 2 2 1
21 2 1
EA1 BLACK EB3 GRAY
EF1 GRAY
(4WD) ED1 DARK GRAY
EE1 GRAY
Code Joining Wire Harness and Wire Harness (Connector Location)
EA1 Engine Room Main Wire and Engine No.2 Wire (Near the Battery)
EB3 Engine Wire and Differential Wire (Front Differential Upper Side)
ED1 Sensor Wire and Engine Wire (Over the Cylinder Head)
EE1 Engine Wire and Sensor Wire (Over the Cylinder Head)
EF1 Cowl Wire and Engine Room Main Wire (Front Right Fender)
2001 TOYOTA TACOMA (EWD440U)
42
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points
[3RZ-FE, 2RZ-FE]
: Location of Splice Points
2001 TOYOTA TACOMA (EWD440U)
43
G
Connector Joining Wire Harness and Wire Harness
1 2
3 4
2 1
341 2 3
654
3 2 1456
21 2 1
EA1 BLACK EB3 GRAY EF1 GRAY(4WD)
Code Joining Wire Harness and Wire Harness (Connector Location)
EA1 Engine Room Main Wire and Engine No.2 Wire (Near the Battery)
EB3 Engine Wire and Differential Wire (Front Differential Upper Side)
EF1 Cowl Wire and Engine Room Main Wire (Front Right Fender)
2001 TOYOTA TACOMA (EWD440U)
44
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points
: Location of Splice Points
2001 TOYOTA TACOMA (EWD440U)
45
G
Connector Joining Wire Harness and Wire Harness
Code Joining Wire Harness and Wire Harness (Connector Location)
IF1
IF2 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IF3
g ( )
IG1 Cowl Wire and Roof Wire (Left Kick Panel)
IH1
IH2 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IH3
( )
IK2
IK3Engine Wire and Cowl Wire (Above the Glove Box)
IK6Engine Wire and Cowl Wire (Above the Glove Box)
IK7
IL1Front Door RH Wire and Cowl Wire (Right Kick Panel)
IL2Front Door RH Wire and Cowl Wire (Right Kick Panel)
2001 TOYOTA TACOMA (EWD440U)
46
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness[Double Cab]
: Location of Splice Points
2001 TOYOTA TACOMA (EWD440U)
47
G
Connector Joining Wire Harness and Wire Harness
1 2 3 4 56 7 8 9 10 11 12 13
1234513 6789101112
1 2 3 4 56 7 8 9 10
5 4 3 2 110 9 8 7 6
421
3 56 7
42 1
3567
1 23 4
2 14 3
1 23 4 5 6
7 8
123456
78
1 2 2 11 23 4 5 6
7 8
123456
78
1 2 2 1
BN1 BN6
BO1 BO2 BQ1
BQ2 BR1 BR2
GRAY GRAY
Code Joining Wire Harness and Wire Harness (Connector Location)
BN1Frame Wire and Cowl Wire (Under the Driver’s Seat)
BN6Frame Wire and Cowl Wire (Under the Driver’s Seat)
BO1Frame Wire and Diff Lock Wire (Rear Side Member LH)
BO2Frame Wire and Diff. Lock Wire (Rear Side Member LH)
BQ1Rear Door No 2 Wire and Cowl Wire (Under the Left Center Pillar)
BQ2Rear Door No.2 Wire and Cowl Wire (Under the Left Center Pillar)
BR1Rear Door No 1 Wire and Cowl Wire (Under the Right Center Pillar)
BR2Rear Door No.1 Wire and Cowl Wire (Under the Right Center Pillar)
2001 TOYOTA TACOMA (EWD440U)
48
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness[Except Double Cab]
: Location of Splice Points
2001 TOYOTA TACOMA (EWD440U)
49
G
Connector Joining Wire Harness and Wire Harness
1 2 3 4 56 7 8 9 10 11 12 13
1234513 6789101112
1 2 3 4 56 7 8 9 10
5 4 3 2 110 9 8 7 6
421
3 56 7
42 1
3567
1 23 4
2 14 3
1 2 2 1
1 2 2 1
BN1 BN6
BO1 BO2 BS1GRAY GRAY
BT1
(Regular Cab)
(Regular Cab)
Code Joining Wire Harness and Wire Harness (Connector Location)
BN1Frame Wire and Cowl Wire (Under the Driver’s Seat)
BN6Frame Wire and Cowl Wire (Under the Driver’s Seat)
BO1Frame Wire and Diff Lock Wire (Rear Side Member LH)
BO2Frame Wire and Diff. Lock Wire (Rear Side Member LH)
BS1 Rear Speaker LH Wire and Cowl Wire (Under the Left Center Pillar)
BT1 Rear Speaker RH Wire and Cowl Wire (Under the Right Center Pillar)
2001 TOYOTA TACOMA (EWD440U)
50
G ELECTRICAL WIRING ROUTING
: Location of Connector Joining Wire Harness and Wire Harness
2001 TOYOTA TACOMA (EWD440U)
51
G
Connector Joining Wire Harness and Wire Harness
1 2 12
BU1
Code Joining Wire Harness and Wire Harness (Connector Location)
BU1 Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)
2001 TOYOTA TACOMA (EWD440U)
54
POWER SOURCE
B- W
B- W
W
B- Y(*1)
B- Y(*2)
W- R
R2
50A HEATER2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
R Y- R
B- W
W- B
R- B
B- W
B
W
G- Y
V
B- Y
W
BA
TTE
RY
HEATER RELAY
L- Y
R- W
W- R
30A AM2
HEAD RELAY
15A DOME
20A EFI
7. 5A OBD
120A ALT
15A PWR OUTLET
40A AM1
60A ABS
TAIL RELAY
1 22
1 2
1 2
1 2
2 1
1 2
1 2
1 2
1 2
1
3
2
4
5
2
2
3
3
1
1
5
4
2W
2G- Y
7. 5A ALT- S
1 2
2B- R1 2
50A J/B
B- R
2001 TOYOTA TACOMA (EWD440U)
55
W- R
W
B- W
B- W
* 1 : W/O DAYTIME RUNNING LIGHT
10A A. C
1
1
1
2
1K
2
1I
1
1I
2
1I
3
L- W
2
10A HEAD(LH)
10A HEAD(RH)
10A HEAD(LO LH)
10A HEAD(LO RH)
10A HEAD(HI LH)
10A HEAD(HI RH)
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
E 3
B- Y2
7
3
4
6AM2
AM1
ACC
IG1
ST1
IG2
G
W
W- R
R- W
L-R
B-R
R- L
P- G
B- Y
(*1)
(*1)
(*2)
(*2)
(*2)
G- O
(*2)
L
(*2)
B- Y
L
(*2)
W- R
(*2)
V- Y
(*2)
G- W
(*2)
7. 5A DRL
2
B-Y
( *2)
7. 5A STA
10A TURN
20A WIPER
7. 5A ECU- IG
20A 4WD
10A GAUGE
15A ACC
15A HORN. HAZ
IGNITION SWI14
DIMMERRELAY
* 2 : W/ DAYTIME RUNNING LIGHT
3
2
31
2
3
2
2
4
1
3
2
2
1 22
1
1
1
1
1
B-Y
( *2)
B- Y(*2)
B- Y(*1)
10A TAIL
1I4 7. 5A IGN
B- R
10A STOP
7. 5A ECU- B
1 2
30A POWER
B
B- R
2001 TOYOTA TACOMA (EWD440U)
56
POWER SOURCE
HEATER RELAY1-2 : Closed with ignition SW on and heater blower SW on
HEAD RELAY2-1 : Closed with light control SW at HEAD position or dimmer SW at FLASH position
Closed with engine running and parking brake lever released (w/ daytime running light)
I14 IGNITION SW2-3 : Closed with ignition key at ACC or ON position2-4 : Closed with ignition key at ON or ST position7-6 : Closed with ignition key at ON or ST position
TAIL RELAY5-3 : Closed with light control SW at TAIL or HEAD position
DIMMER RELAY4-3 : Closed with HEAD relay on and dimmer SW at HIGH or FLASH position
: PARTS LOCATION
Code See Page Code See Page Code See Page
I14 35
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1I23 Engine Room Main Wire and J/B No 1 (Lower Finish Panel)
1K23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E3 40 (5VZ-FE) Engine Room Main Wire E3 42 (3RZ-FE, 2RZ-FE) Engine Room Main Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
57
MEMO
2001 TOYOTA TACOMA (EWD440U)
58
STARTING AND IGNITION (5VZ-FE)
5 3E
EA
21 IF1
2
(M/T)
B- W
10 3E
6 3EP
N
9
6
21
1
2
IK2
AM2
AM1
ACC
IG1
ST1
IG2
1
B-W
( M/T
)
( M/T
)
( A/T
)
( A/T
)
(A/T)
( M/T
)
(M/T)
B- W
B- W(A/T)
B-W
B-W
B-Y
B-Y
B-W
B-W
( M/T
)
W-B
W-B
W-B
B-Y
W
W-RW
W-RW
W
B- Y
B- R
B
B- R
B- R
B- Y223E
C 9
CLU
TCH
STA
RT
SW
P 1
PA
RK
/NE
UTR
AL
PO
SIT
ION
SW
21 3E
20 3E
2
7
1
6
I 8
3 2
5 1
M
EA14
B1 A1
B
B-W
B-W
IGNITION SWI14
BATTERY
2
8 IK3
W
D A
E
STARTERRELAY
2 2
2 2
120A
ALT
2
2
1
40A
AM
1
B
B
30A
AM
2
1
2
2
JUNCTIONCONNECTOR
BJ 9 , J10A
STARTER
BS 1 , S 2A
7. 5ASTA
1F6
1I3
2001 TOYOTA TACOMA (EWD440U)
59
IE
1
2
I13I13
1 IK2
17 IF1
(M/T
)
B-Y
(M/T)
B- Y
(M/T
)
( M/T
)
( M/T
)( M
/T)
( M/T
)
W-B
W-B
W-B
B-W
W-B
3A
I 9
3 5
1
20
3A16
IG
CLU
TCH
ST
AR
T C
AN
CE
L S
WC
8
2
1
2
1
EB
3 7 6 5 4
891210
B- R
B-R
B-R
B-R
B-R
B-R
LG-B
B-R
G
G-YGR
B-L
G-B
B-W B-Y
BR
B-R
B- R
IGN
ITIO
N C
OIL
NO
. 1I 3 IG
NIT
ION
CO
IL N
O. 2
I 4 IGN
ITIO
N C
OIL
NO
. 3I 5
IGNITERI 2
TO T
AC
HO
ME
TER
[CO
MB
. M
ET
ER
]
11 IK2
LG-B
B-R
B-R
10AGAUGE
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F5
3D15
7
19 3D
IGT1 IGT2 IGT3 IGF
( M/T
)
11 12 13 25
ENGINE CONTROL MODULEE 8
( M/T
)
(M/T)
B- W
2001 TOYOTA TACOMA (EWD440U)
60
STARTING AND IGNITION (5VZ-FE)
S1 (A), S2 (B) STARTERPoints closed with Park/Neutral position SW at P or N position and ignition SW at ST position (A/T)Points closed with clutch start SW or clutch start cancel SW on and ignition SW at ST position (M/T)
I14 IGNITION SW7-6 : Closed with ignition SW at ON or ST position2-1 : Closed with ignition SW at ST position
P1 PARK/NEUTRAL POSITION SW (A/T)9-6 : Closed with A/T shift lever in P or N position
STARTER RELAY5-3 : Closed with Park/Neutral position SW at P or N position and ignition SW at ST position (A/T)5-3 : Closed with clutch start SW or clutch start cancel SW on and ignition SW at ST position (M/T)
C8 CLUTCH START CANCEL SW (M/T)1-3 : Closed with ignition SW on and cancel SW on
Code See Page Junction Block and Wire Harness (Connector Location)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1I 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
3A
3D 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3E
( )
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EA1 40 (5VZ-FE) Engine Room Main Wire and Engine No.2 Wire (Near the Battery)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK244 Engine Wire and Cowl Wire (Above the Glove Box)
IK344 Engine Wire and Cowl Wire (Above the Glove Box)
: GROUND POINTS
Code See Page Ground Points Location
EA 40 (5VZ-FE) Front Left Fender
EB 40 (5VZ-FE) Near the Throttle Body
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
61
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I8 44 Engine Room Main Wire I13 44 Engine Wire
I9 44 Cowl Wire
2001 TOYOTA TACOMA (EWD440U)
62
STARTING (3RZ-FE, 2RZ-FE)
5 3E
EA
21 IF1
2
10 3E
6 3EP
N
21
1
2
IK2
AM1
ACC
IG1
ST1
1
B-W
( M/T
)
( M/T
)
( A/T
)
( A/T
)( A
/T)
( M/T
)
(M/T)
B- W
B- W(A/T)
B-W
B-W
B-Y
B-Y
B-W
B-W
( M/T
)
W-B
W-B
W-B
B-Y
W
WW
W
B-Y
B
B- Y223E
C 9
CLU
TCH
STA
RT
SW
21 3E
20 3E
2
1
I 8
3 2
5 1
M
EA14
B1 A1
B
B-W
B-W
IGNITION SWI14
BATTERY
2
8 IK3
W
D A
E
STARTERRELAY
2 2
2 2
120A
ALT
2
2
1
40A
AM
1
B
STARTER
BS 1 , S 2A
JUNCTIONCONNECTOR
BJ 9 , J10A
7. 5ASTA
1F6
1I3
B
B6 (2RZ- FE)A9 (3RZ- FE)
A6 (3RZ- FE)
B5 (2RZ- FE)
BP
1,
A
PA
RK
/NE
UTR
AL
PO
SIT
ION
SW
(M/T)
B- W
(M/T
)
2001 TOYOTA TACOMA (EWD440U)
63
IE
( M/T
)
B-Y
(M/T)
B- Y
(M/T)
B- W
( M/T
)
( M/T
)
( M/T
)( M
/T)
W-B
W-B
W-B
W-B
3A
I 9
20
3A16
IG
3D19
7
15 3D
5 1F
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
10AGAUGE
B-R
B-R
C 8
CLU
TCH
ST
AR
T C
AN
CE
L S
W
1
53
( M/T
)( M
/T)
2001 TOYOTA TACOMA (EWD440U)
64
STARTING (3RZ-FE, 2RZ-FE)
S1 (A), S2 (B) STARTERPoints closed with Park/Neutral position SW at P or N position and ignition SW at ST position (A/T)Points closed with clutch start SW or clutch start cancel SW on and ignition SW at ST position (M/T)
I14 IGNITION SW2-1 : Closed with ignition SW at ST position
P1 (A), (B) PARK/NEUTRAL POSITION SW (A/T)(A) 9-(A) 6, (B) 6-(B) 5 : Closed with A/T shift lever in P or N position
STARTER RELAY5-3 : Closed with Park/Neutral position SW at P or N position and ignition SW at ST position (A/T)5-3 : Closed with clutch start SW or clutch start cancel SW on and ignition SW at ST position (M/T)
C8 CLUTCH START CANCEL SW (M/T)1-3 : Closed with ignition SW on and cancel SW on
The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission, etc. An outlineof engine control is given here.
1. INPUT SIGNAL(1) Engine coolant temp. signal system
The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance whichvaries according to the water temp. Thus the engine coolant temp. is input in the form of a control signal to TERMINALTHW of the engine control module.
(2) Intake air temp. signal systemThe intake air temp. sensor is installed inside the mass air flow meter and detects the intake air temp., which is input asa control signal to TERMINAL THA of the engine control module.
(3) Heated oxygen sensor signal systemThe oxygen density in the exhaust emissions is detected and input as a control signal to TERMINAL OXS of the enginecontrol module. To maintain stable detection performance by the heated oxygen sensor, a heater is used for warmingthe sensor. The heater is also controlled by the engine control module (HTS).
(4) RPM signal systemCamshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor,camshaft position is input as a control signal to TERMINAL G2 of the engine control module, and engine RPM is input toTERMINAL NE+.
(5) Throttle signal systemThe throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TERMINAL VTAof the engine control module.
(6) Vehicle speed signal systemThe vehicle speed sensor detects the vehicle speed and inputs a control signal to TERMINAL SP1 of the engine controlmodule via the combination meter.
(7) A/C SW signal systemThe operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC1of the engine control module.
(8) Battery signal systemVoltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned to on,voltage for engine control module operation is applied via the EFI relay to TERMINAL +B of the engine control module.
(9) Intake air volume signal systemIntake air volume is detected by the mass air flow meter and a signal is input into TERMINAL VG of the engine controlmodule as a control signal.
(10)Stop light SW signal systemThe stop light SW is used to detect whether or not the vehicle is braking and the information is input as a control signalto TERMINAL STP of the engine control module.
(11) Starter signal systemTo confirm that the engine is cranking, the voltage applied to the starter motor during cranking is detected and is input asa control signal to TERMINAL STA of the engine control module.
(12)Engine knock signal systemEngine knocking is detected by the knock sensor 1 and 2 and the signals are input to TERMINALS KNK1 and KNK2 ofthe engine control module.
(13)4WD signal systemWhether or not the vehicle is operating in 4WD mode is determined, and a control signal is input to TERMINAL 4WD ofthe engine control module.
(14)Air fuel ratio signal systemThe air fuel ratio is detected and input as a control signal into TERMINAL AF1+ of the engine control module.
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
75
2. CONTROL SYSTEM∗ SFI system
The SFI system monitors the engine conditions through the signals (Input signals (1 to 13) ) input from each sensor tothe engine control module. Based on this data and the program memorized in the engine control module, the mostappropriate fuel injection timing is decided and current is output to TERMINALS #10, #20, #30, #40, #50 and #60 of theengine control module, causing the injectors to operate (to inject fuel). It is this system which, through the work of theengine control module, finely controls fuel injection in response to driving conditions.
∗ Electronic Spark Advance systemThe ESA system monitors the engine conditions using the signals (input signals (1, 4, 5 to 7, 9, 11, 12) ) input to theengine control module from each sensor. Based on this data and the program memorized in the engine control module,the most appropriate ignition timing is decided and current is output to TERMINALS IGT1,IGT2 and IGT3 of the enginecontrol module. This output controls the igniter to produce the most appropriate ignition timing for the driving conditions.
∗ Heated oxygen sensor heater control systemThe heated oxygen sensor heater control system turns the heater to on when the intake air volume is low (Temp. ofexhaust emissions low), and warms up the heated oxygen sensor to improve detection performance of the sensor. Theengine control module evaluates the signals (Input signals (1, 4, 8, 9, 11) ) from each sensor, current is output toTERMINAL HTS and controls the heater.
3. DIAGNOSIS SYSTEMWith the diagnosis system, when there is a malfunction in the ECU signal system, the malfunctioning system is recorded inthe memory. The malfunctioning system can then be found by reading the display (Code) of the malfunction indicator lamp.
4. FAIL-SAFE SYSTEMWhen a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control basedon the signals from that system, the fail-safe system either controls the system by using data (Standard values) recorded inthe engine control module memory or else stops the engine.
2001 TOYOTA TACOMA (EWD440U)
76
ENGINE CONTROL (5VZ-FE)
EFI RELAY5-3 : Closed with ignition SW at ON or ST position
C6 CIRCUIT OPENING RELAY5-3 : Closed with starter running or ignition SW at ON or ST position
Code See Page Junction Block and Wire Harness (Connector Location)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1I 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
3A
3B
3D 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3E
( )
3F
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
ED1 40 (5VZ-FE) Sensor Wire and Engine Wire (Over the Cylinder Head)
EE1 40 (5VZ-FE) Engine Wire and Sensor Wire (Over the Cylinder Head)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK2
IK3 44 Engine Wire and Cowl Wire (Above the Glove Box)
IK6
g ( )
BN146 (Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)BN148 (Except Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)
: GROUND POINTS
Code See Page Ground Points Location
EA 40 (5VZ-FE) Front Left Fender
EB 40 (5VZ-FE) Near the Throttle Body
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E1 40 (5VZ-FE) Sensor Wire I13 44 Engine Wire
E2 40 (5VZ-FE) Engine Wire I1444 Cowl Wire
I3 44 Cowl Wire I1544 Cowl Wire
2001 TOYOTA TACOMA (EWD440U)
78
ENGINE CONTROL (3RZ-FE)
(M/T)
5
16
4
(A/T
)
IF117
3E21
3E20
3E22
2
1
P
N
9
6
B- W
W- L
B-Y
IK38
B-Y
( A/T
)
BR
W-B
BR
W-B
IK221
3E8
3E5
7
EFIRELAY
V
WV
W- R
7. 5AIGN
W- R
1F11
VB-Y
B-Y
B-O
B- R
G- Y
B- Y(A/T)
B- R
C 9
CLU
TCH
ST
AR
T S
W
P 1
PA
RK
/NE
UT
RA
LP
OS
ITIO
N S
W
( M/T
)
B-Y
(A/T)
B- Y
B-Y
B
B- R
W-B
W-B
B- W
B-W
B-W
2 3
1 5
2 2
W
2 2
2
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
20AEFI
2
7. 5AOBD
2
B- Y
10ASTOP
1F
2
IE EF
IF112
IK223
3A16
15 3A
EA
BD
AE
SGCG
BAT SIL
B-W
( A/T
)
2
1
30A
AM
2
2
2
I14IGNITION SW
BATTERY
W-R
WW
-R
40A
AM
112
0A A
LT
2
7
2
6
1
AM1
AM2
ACC
IG2
IG1
ST1
W
1
2
2
1
B
B
JUNCTIONCONNECTOR
J11
1 1
JUN
CT
ION
CO
NN
EC
TO
R
BJ
9,
J10
A
7. 5ASTA
1F6
1I3
2
IF123
B-O
W-B
W- R
W-R
C 6
CIR
CU
ITO
PE
NIN
GR
ELA
Y
W-L
F 8
FUE
L P
UM
P
BN19
5
4
LL
W-B
W-B
W-L
IK225
BN16
2 3
1 5
I 3
DATA LINKCONNECTOR 3
D 7
9
TAC
LG-B
FRO
M C
OM
BIN
AT
ION
ME
TER
13
R
TC
R
W-R
W-L
IG
( A/T
)
M
2001 TOYOTA TACOMA (EWD440U)
79
1 A12 A
13 IK2
7 IF1
15
IF1
IK21
15 A
3F7
3F6
A22
1
2 2
1
2
1 1
2
D2D1 D3 D4
I13
C6
1
2
1
2
I13
C7 7A16 AB6 C22 C14 C21
MA
SS
AIR
FLO
W M
ET
ER
M 1
C18
1
2
1
2
C19 C12
I13I13I13
I13
W- L
B- W
W- R
W- R
W
B- Y
G- Y
B- R
B- Y(A/T)
I13 I13B- R B- R B- R
B- R
G- Y
B- Y B-Y
( A/T
)
W-R W R R-L
B-R
B-R
B-R
B-R
G-Y
G-W
G-W
INJE
CT
OR
NO
. 1I 6 IN
JEC
TO
R N
O. 2
I 7 INJE
CT
OR
NO
. 3I 8 IN
JEC
TO
R N
O. 4
I 9
VS
V (
EV
AP
)V
4
VS
V (
VA
PO
RP
RE
SS
UR
E S
EN
SO
R)
V 9
EN
GIN
E C
OO
LAN
TTE
MP
. S
EN
SO
R
E 3
EG
R G
AS
TE
MP
. S
EN
SO
RE
1
4 5 2
3 1
W-R
W-R
W-R
W-G
G-B
W-R
W-L
B-W
B-W GR
Y-G LG P-L
G-R
LGLGLGLGW-R
W-R
W-R
W- R W- R W- R
LG LG LG
W- RI13
W-R
W- R
W- R
1
B28
PO
WE
R S
TE
ER
ING
OIL
PR
ES
SU
RE
SW
P10
SIL BATT STP NSW #10 #20 #30 #40
THWTHGE2THAVGEVGSTAFC+BEVP TPC
PSSW
ENGINE CONTROL MODULE
BE 5 , E 6A C, E 7 D, E 8
Y
R
B7
TC
R
1
2
ST
OP
LIG
HT
SW
S 5
3E3
3E4 3E1
I14
3E2 W- R
W-R
W-R
IK2
5
2001 TOYOTA TACOMA (EWD440U)
80
ENGINE CONTROL (3RZ-FE)
B5 C9
I13
114 CC
A13 A14 B10 A19
TO
CR
UIS
E C
ON
TRO
L E
CU
2 C
I13
I13
B8
I13
D15 C5
1
2
I13
W-R
V 3
VS
V (
EG
R)
+B E1
I13
D11
910
A/C CONTROLASSEMBLY
A25
L-B
L-Y
G-B GR
B
12 31 21
3 32 23 1
LG-R G
-YG
-Y
G-Y
Y
R-Y
B-R
R-B
LG LG W-R
W-R
W-R BR
LG
W- R W- R W- R W- R
BR
W- RW- R
THROTTLEPOSITIONSENSOR
T 1VAPORPRESSURESENSOR
V 8IDLE AIRCONTROL VALVE
I 1
TO A
DD
DE
TEC
TIO
N S
W[A
DD
AC
TUA
TO
R]
TO D
ETE
CT
ION
SW
( TR
AN
SFE
R L
4 P
OS
ITIO
N)
D 1DATA LINKCONNECTOR 1
AIR
FU
EL
RA
TIO
SE
NS
OR
( BA
NK
1 S
EN
SO
R 1
)
A23
42
1 3
BR
3 2
13
LG-B
TO T
AC
HO
ME
TER
[CO
MB
. M
ET
ER
]11 IK2
( *1)
( *1)
LG-B
TACAC1 ACT 4WD L4 IGT1
AF+AFHTEGRRSDE04PTNKVCVTAIDLO
( 4W
D)
( 4W
D A
/T)
IGNITIONCOIL ANDIGNITER NO. 1
I20
D12
3 2
IGT2
IGNITIONCOIL ANDIGNITER NO. 2
I21
D13
3 2
IGT3
IGNITIONCOIL ANDIGNITER NO. 3
I22
D14
3 2
IGT4
IGNITIONCOIL ANDIGNITER NO. 4
I23
I13 I13
B-L L
L-R
L-Y
B-Y
B-Y
B-Y
D10
B-Y
B-Y
IGF
D6
EF
BR
W-B BR
KNK
1
D28
V B
C20
AF-
P
KN
OC
K S
EN
SO
RK
1
W
ENGINE CONTROL MODULE
BE 5 , E 6A C, E 7 D, E 8
B- Y
W- R
W-B
I13
BR
( SH
IELD
ED
)
( SH
IELD
ED
)
2001 TOYOTA TACOMA (EWD440U)
81
EF
( *2)
( *2)
CONTROLCIRCUIT
(*1)
SP
EE
DO
ME
TE
R
MA
LFU
NC
TIO
NIN
DIC
ATO
R L
AM
P
R-W
W-B
3 C10 C
W-B
V-R BR
W-BBR
W-B
BR
W-R
BR
W-B
E 4
BR
V-R
BR
BR
W- R
BR
D21
I13
17 C
BR
BR
D31 D5 A6
C16 C24
3
I13
C15
CAMSHAFTPOSITION SENSOR
C 1
A21
C 2CRANKSHAFTPOSITION SENSOR
B-R
BR
G- O
B-R
G-O
G-O
RGL
BR10AGAUGE
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F5
1221
3D193D4
3D5
24
3B17
3B19
ID
3 1
( SH
IELD
ED
)
( SH
IELD
ED
)
( *1)
* 1 : W/ TACHOMETER* 2 : W/O TACHOMETER
G
BR
3D20
IK220 IK26
3D17
B-R
IK215
2 3 1
L
G-R
B-R
P
G-RL
VEHICLE SPEED SENSORV10
( *1)
(* 2)
NE+ NE- G2+ SP1
OXS HTS E1 E01 E02 E03 W
HE
ATE
D O
XY
GE
N S
EN
SO
R( B
AN
K 1
SE
NS
OR
2)
H 9
I13
IK710
BR
BR
IK212 IK74
(SH
IELD
ED
)
R-W
B
I13
( SH
IELD
ED
)
B
BR
BR
I13
G
ENGINE CONTROL MODULE
BE 5 , E 6A C, E 7 D, E 8
CO
MB
INA
TIO
N M
ET
ER
C10
7 8 2 9
3 5
I15
BR
10ATAIL
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
2
2
1
1F4
1E6
3C16
3C20
A20
G-R
G-R
G
W-B
I13
IK214BR
ELS
2001 TOYOTA TACOMA (EWD440U)
82
ENGINE CONTROL (3RZ-FE)
The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission, etc. An outlineof engine control is given here.
1. INPUT SIGNAL(1) Engine coolant temp. signal system
The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance whichvaries according to the water temp. Thus the engine coolant temp. is input in the form of a control signal to TERMINALTHW of the engine control module.
(2) Intake air temp. signal systemThe intake air temp. sensor is installed inside the mass air flow meter and detects the intake air temp., which is input asa control signal to TERMINAL THA of the engine control module.
(3) Heated oxygen sensor signal systemThe oxygen density in exhaust emissions is detected and input as a control signal to TERMINAL OXS of the enginecontrol module. To maintain stable detection performance by the heated oxygen sensor, a heater is used for warmingthe sensor. The heater is also controlled by the engine control module (HTS).
(4) RPM signal systemCamshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor,camshaft position is input as a control signal to TERMINAL G2+ of the engine control module, and engine RPM is inputto TERMINAL NE+.
(5) Throttle signal systemThe throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TERMINAL VTAof the engine control module.
(6) Vehicle speed signal systemThe vehicle speed sensor detects the vehicle speed and inputs a control signal to TERMINAL SP1 of the engine controlmodule via the combination meter.
(7) A/C SW signal systemThe operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC1of the engine control module.
(8) Battery signal systemVoltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned to on,voltage for engine control module operation is applied via the EFI relay to TERMINAL +B of the engine control module.
(9) Intake air volume signal systemIntake air volume is detected by the mass air flow meter and a signal is input into TERMINAL VG of the engine controlmodule as a control signal.
(10)Stop light SW signal systemThe stop light SW is used to detect whether or not the vehicle is braking and the information is input as a control signalto TERMINAL STP of the engine control module.
(11) Starter signal systemTo confirm that the engine is cranking, the voltage applied to the starter motor during cranking is detected and is input asa control signal to TERMINAL STA of the engine control module.
(12)Engine knock signal systemEngine knocking is detected by the knock sensor and input as a control signal to TERMINAL KNK of the engine controlmodule.
(13)4WD signal systemWhether or not the vehicle is operating in 4WD mode is determined, and a control signal is input to TERMINAL 4WD ofthe engine control module.
(14)Air fuel ratio signal systemThe air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
83
2. CONTROL SYSTEM∗ SFI system
The SFI system monitors the engine conditions through the signals (Input signals (1 to 13) ) input from each sensor tothe engine control module. Based on this data and the program memorized in the engine control module, the mostappropriate fuel injection timing is decided and current is output to TERMINALS #10, #20, #30 and #40 of the enginecontrol module, causing the injectors to operate (to inject fuel). It is this system which, through the work of the enginecontrol module, finely controls fuel injection in response to driving conditions.
∗ Electronic spark advance systemThe ESA system monitors the engine conditions using the signals (input signals (1, 4, 5 to 7, 9, 11, 12) ) input to theengine control module from each sensor. Based on this data and the program memorized in the engine control module,the most appropriate ignition timing is decided and current is output to TERMINALS IGT1, IGT2, IGT3 and IGT4 of theengine control module. This output controls the igniter to produce the most appropriate ignition timing for the drivingconditions.
∗ Heated oxygen sensor heater control systemThe heated oxygen sensor heater control system turns the heater to on when the intake air volume is low (Temp. ofexhaust emissions low), and warms up the heated oxygen sensor to improve detection performance of the sensor. Theengine control module evaluates the signals (Input signals (1, 4, 8, 9, 11) ) from each sensor, current is output toTERMINAL HTS and controls the heater.
3. DIAGNOSIS SYSTEMWith the diagnosis system, when there is a malfunction in the ECU signal system, the malfunctioning system is recorded inthe memory. The malfunctioning system can then be found by reading the display (Code) of the malfunction indicator lamp.
4. FAIL-SAFE SYSTEMWhen a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control basedon the signals from that system, the fail-safe system either controls the system by using data (Standard values) recorded inthe engine control module memory or else stops the engine.
2001 TOYOTA TACOMA (EWD440U)
84
ENGINE CONTROL (3RZ-FE)
EFI RELAY5-3 : Closed with ignition SW at ON or ST position
C6 CIRCUIT OPENING RELAY5-3 : Closed with starter running or ignition SW at ON or ST position
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1I 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
3A
3B
3C24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3D24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3E
3F
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK2
IK3 44 Engine Wire and Cowl Wire (Above the Glove Box)
IK7
g ( )
BN146 (Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)BN148 (Except Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)
: GROUND POINTS
Code See Page Ground Points Location
EA 42 (3RZ-FE) Front Left Fender
EF 42 (3RZ-FE) Ignition Coil Braket
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E4 42 (3RZ-FE) Engine Wire I1444 Cowl Wire
I3 44 Cowl Wire I1544 Cowl Wire
I13 44 Engine Wire
2001 TOYOTA TACOMA (EWD440U)
86
ENGINE CONTROL (2RZ-FE)
(M/T)
2
1
30A
AM
2
5
16
4
2
2
(A/T
)
I14
IF117
3E21
3E20
3E22
2
1
P
N
6
5
B- W
W- L
IK38
B-Y
( A/T
)
BR
W-B
BR
W-B
IK221
3E8
3E5
DA
TA L
INK
CO
NN
EC
TO
R 3
7
EFIRELAY
V
WV
W- R
7. 5
A IG
NW- R
1F11
VB-Y
B-Y
B-O
B- R
G- Y
B- Y(A/T)
B- R
C 9
CLU
TCH
ST
AR
T S
W
P 1
PA
RK
/NE
UTR
AL
PO
SIT
ION
SW
B-Y
( A/T
)
IGNITION SW
B
B- R
B
W-B
BATTERY
W-B
B- W
B-W
W-R
B-W
2 3
1 5
2 2
W
2 2
2
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
20AEFI
2
7. 5AOBD
2
B- Y
10ASTOP
1F
2
W
IE EF
IF112
IK223
3A16
15 3A
EA
W-R
BD
AE
SGCG
BAT SIL
B-W
( A/T
)
40A
AM
112
0A A
LT
2
7
2
6
1
AM1
AM2
ACC
IG2
IG1
ST1
W
1
2
2
1
B
B
JUNCTIONCONNECTOR
J11
(A/T
)
B-Y
B-Y
( M/T
)
B-Y
1 1
JUNCTIONCONNECTOR
BJ 9 , J10A
7. 5
A S
TA
1F6
1I3
2
IF123
B-O
W-B
51
32
W-R
W-L
F 8FUELPUMP
BN19
5
4
IG
LL
W-B
W-B
W-L
W-L
IK225 BN16
I 3
W-R
CIR
CU
IT O
PE
NIN
GR
ELA
Y
C 6
D 7 9
LG-B
TAC
FRO
M C
OM
BIN
AT
ION
ME
TER
13
R
TC
R
M
2001 TOYOTA TACOMA (EWD440U)
87
1 A12 A
7 IF1
15
IF1
IK21
15 A
3F7
3F6
A22
1
2 2
1
2
1 1
2
D2D1 D3 D4
I13
C6
1
2
1
2
I13
C7 7A16 AB6 C22 C14 C21 C18
1
2
C12
I13I13
I13
TPC
W- L
B- W
W- R
W- R
W
B- Y
G- Y
B- R
B- Y(A/T)
I13 I13B- R B- R B- R
B- R
G- Y
B- Y B-Y
( A/T
)
W-R W R R-L
B-R
B-R
B-R
B-R
G-W
G-W
INJE
CT
OR
NO
. 1I 6 IN
JEC
TO
R N
O. 2
I 7 INJE
CT
OR
NO
. 3I 8 IN
JEC
TO
R N
O. 4
I 9
VS
V (
EV
AP
)V
4
VS
V (
VA
PO
RP
RE
SS
UR
E S
EN
SO
R)
V 9
EN
GIN
E C
OO
LAN
TT
EM
P.
SE
NS
OR
E 3
4 5 2
3 1
W-R
W-R
W-R
W-R
W-G
G-B
W-R
W-L
B-W
B-W GR
Y-G LG G-R
LGLGLGW-R
W-R
W-R
W- R W- R W- R
LG LG
W- R
MA
SS
AIR
FLO
W M
ETE
RM
1
SIL BATT STP NSW #10 #20 #30 #40
EVP+B FC STA EVG VG THA E2 THW
I13W- R
ENGINE CONTROL MODULE
BE 5 , E 6A E 7, C E 8, D
28 B
PSSW
Y
1PO
WE
R S
TE
ER
ING
OIL
PR
ES
SU
RE
SW
P10
W- R
R
B7
R
IK2
5
ST
OP
LIG
HT
SW
S 5
1
2
TC
3E3
3E4 3E1 3E2
I14
IK213
W-R
W-R
W- R
2001 TOYOTA TACOMA (EWD440U)
88
ENGINE CONTROL (2RZ-FE)
EF
C9V
114 CC
A13 A14
2 C
I13
I13
B
D6
I13
D15
W-R
( SH
IELD
ED
)
1
D28
B
+B E1
I13
D11 D10D12
910
A/C CONTROLASSEMBLY
A25
L-B
L-Y
12 31 21
3 32 23 1
G-Y
G-Y
G-Y
Y
W-B BR
B-R
LG LG W-R
W-R BR
LG
W- R W- R
BR
W- R
THROTTLEPOSITIONSENSOR
T 1VAPORPRESSURESENSOR
V 8IDLE AIRCONTROL VALVE
I 1
D 1DATA LINKCONNECTOR 1
W
AIR
FU
EL
RA
TIO
SE
NS
OR
( BA
NK
1 S
EN
SO
R 1
)
A23
42
1 3
I13
3 2 3 2
B-L
B-Y L
B-Y
B-Y
KN
OC
K S
EN
SO
RK
1
B13
11 IK2
LG-B
LG-B
( *1)
( *1)
TO T
AC
HO
ME
TE
R[C
OM
B.
ME
TER
]2
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
10ATAIL
A20
G-R
G
2
1
ENGINE CONTROL MODULE
BE 5 , E 6A E 7, C D, E 8
VTA VC E04 RSD KNKAFHT AF+
AC1 ACT TAC ELS IGT1 IGT2 IGF
3C16
3C20
D13
3 2
L-R
B-Y
IGT3 IGT4
14
B-Y
2
D
L-Y
3
I13
IGNITION COILAND IGNITERNO. 1
I20IGNITION COILAND IGNITERNO. 2
I21IGNITION COILAND IGNITERNO. 3
I22IGNITION COILAND IGNITERNO. 4
I23
B5
IDLO
LG-R
FRO
M C
RU
ISE
CO
NTR
OL
EC
U
B8
R-Y
PTNK
BR
W-B
BR
20 C
AF-
I13
P
B- Y
BRW- R
1E6
1F
4 G- R
I13
BR
( SH
IELD
ED
)
2001 TOYOTA TACOMA (EWD440U)
89
I13
( *2) (*1)
( *2)
CONTROLCIRCUIT
SP
EE
DO
ME
TE
R
MA
LFU
NC
TIO
NIN
DIC
ATO
R L
AM
P
B
R-W
W-B
3 C10 C
W-B
V-R BR
W-BBR
W-B
BR
W-R BR
W-B
V-R
BR
BR
W- R
BR
D21
G
I13
17 C
BR
BR
D31 D5 A6
C16 C24
3
I13
C15
CAMSHAFTPOSITION SENSOR
C 1
A21
C 2CRANKSHAFTPOSITION SENSOR
B-R
BR
G- O
B-R
G-O
G-O
RGL
BR10AGAUGE
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F5
1221
3D193D4
3D5
24
3B17
3B19
ID
3 1
BR
BR
(SH
IELD
ED
)( S
HIE
LDE
D)
( SH
IELD
ED
)
* 1 : W/ TACHOMETER* 2 : W/O TACHOMETER
BRE 4
3D20
IK220 IK26
2 3
L
G-R
L
G-R
3D17
IK215
1
VEHICLE SPEEDSENSOR
V10
PB
-RB
-R
P
(*2)
( *1)
( *1)
COMBINATION METERC10
7 8 2 9
3 5
ENGINE CONTROL MODULE
BE 5 , E 6A E 7, C D, E 8
OXS
NE+ NE- G2+ SP1
HTS E1 E01 E02 E03 W
I13
G
IK212 IK74
HE
ATE
D O
XY
GE
N S
EN
SO
R( B
AN
K 1
SE
NS
OR
2)
H 9
B
R-W
IK710
BR
BR
BR
I15
EF
I13
BR
W-B
( SH
IELD
ED
)
IK214BR
BR
2001 TOYOTA TACOMA (EWD440U)
90
ENGINE CONTROL (2RZ-FE)
The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission, etc. An outlineof engine control is given here.
1. INPUT SIGNAL(1) Engine coolant temp. signal system
The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance whichvaries according to the water temp. Thus the engine coolant temp. is input in the form of a control signal to TERMINALTHW of the engine control module.
(2) Intake air temp. signal systemThe intake air temp. sensor is installed inside the mass air flow meter and detects the intake air temp., which is input asa control signal to TERMINAL THA of the engine control module.
(3) Heated oxygen sensor signal systemThe oxygen density in the exhaust emissions is detected and input as a control signal to TERMINAL OXS of the enginecontrol module. To maintain stable detection performance by the heated oxygen sensor, a heater is used for warmingthe sensor. The heater is also controlled by the engine control module (HTS).
(4) RPM signal systemCamshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor,camshaft position is input as a control signal to TERMINAL G2+ of the engine control module, and engine RPM is inputto TERMINAL NE-.
(5) Throttle signal systemThe throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TERMINAL VTAof the engine control module.
(6) Vehicle speed signal systemThe vehicle speed sensor detects the vehicle speed and inputs a control signal to TERMINAL SP1 of the engine controlmodule via the combination meter.
(7) A/C SW signal systemThe operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC1of the engine control module.
(8) Battery signal systemVoltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned to on,voltage for engine control module operation is applied via the EFI relay to TERMINAL +B of the engine control module.
(9) Intake air volume signal systemIntake air volume is detected by the mass air flow meter and a signal is input into TERMINAL VG of the engine controlmodule as a control signal.
(10)Stop light SW signal systemThe stop light SW is used to detect whether or not the vehicle is braking and the information is input as a control signalto TERMINAL STP of the engine control module.
(11) Starter signal systemTo confirm that the engine is cranking, the voltage applied to the starter motor during cranking is detected and is input asa control signal to TERMINAL STA of the engine control module.
(12)Engine knock signal systemEngine knocking is detected by the knock sensor and input as a control signal to TERMINAL KNK of the engine controlmodule.
(13)Air fuel ratio signal systemThe air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
91
2. CONTROL SYSTEM∗ SFI system
The SFI system monitors the engine conditions through the signals (Input signals (1 to 12) ) input from each sensor tothe engine control module. Based on this data and the program memorized in the engine control module, the mostappropriate fuel injection timing is decided and current is output to TERMINALS #10, #20, #30 and #40 of the enginecontrol module, causing the injectors to operate (to inject fuel). It is this system which, through the work of the enginecontrol module, finely controls fuel injection in response to driving conditions.
∗ Electronic spark advance systemThe ESA system monitors the engine conditions using the signals (input signals (1, 4, 5 to 7, 9, 11, 12) ) input to theengine control module from each sensor. Based on this data and the program memorized in the engine control module,the most appropriate ignition timing is decided and current is output to TERMINALS IGT1, IGT2, IGT3 and IGT4 of theengine control module. This output controls the igniter to produce the most appropriate ignition timing for the drivingconditions.
∗ Heated oxygen sensor heater control systemThe heated oxygen sensor heater control system turns the heater to on when the intake air volume is low (Temp. ofexhaust emissions low), and warms up the heated oxygen sensor to improve detection performance of the sensor. Theengine control module evaluates the signals (Input signals (1, 4, 8, 9, 11) ) from each sensor, current is output toTERMINAL HTS and controls the heater.
3. DIAGNOSIS SYSTEMWith the diagnosis system, when there is a malfunction in the ECU signal system, the malfunctioning system is recorded inthe memory. The malfunctioning system can then be found by reading the display (Code) of the malfunction indicator lamp.
4. FAIL-SAFE SYSTEMWhen a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control basedon the signals from that system, the fail-safe system either controls the system by using data (Standard values) recorded inthe engine control module memory or else stops the engine.
2001 TOYOTA TACOMA (EWD440U)
92
ENGINE CONTROL (2RZ-FE)
EFI RELAY5-3 : Closed with ignition SW at ON or ST position
C6 CIRCUIT OPENING RELAY5-3 : Closed with starter running or ignition SW at ON or ST position
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1I 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
3A
3B
3C24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3D24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3E
3F
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK2
IK3 44 Engine Wire and Cowl Wire (Above the Glove Box)
IK7
g ( )
BN1 48 (Except Double Cab) Frame Wire and Cowl Wire (Under the Driver’s Seat)
: GROUND POINTS
Code See Page Ground Points Location
EA 42 (2RZ-FE) Front Left Fender
EF 42 (2RZ-FE) Ignition Coil Braket
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E4 42 (2RZ-FE) Engine Wire I1444 Cowl Wire
I3 44 Cowl Wire I1544 Cowl Wire
I13 44 Engine Wire
2001 TOYOTA TACOMA (EWD440U)
94
HEADLIGHT (w/o DAYTIME RUNNING LIGHT)
C12
222
1C6
8
HIGH BEAM INDICATORLIGHT [COMB. METER]
13
A
16
10AHEAD(LH)
HEADLIGHTLH
DIM
ME
RS
WLI
GH
TC
ON
TRO
LS
W
OFF
TAIL
HEAD
LOW
HIGH
FLASH
BATTERY
10AHEAD(RH)
22
2
B- Y
HE
AD
RE
LAY
R-W
R-G
R-Y
R-Y
R-Y
R-L
R-W
R-G
R-Y
R-W
R-G
R-L
COMBINATION SW
H 1
C14
HEADLIGHTRH
H 2
W-B
IF111
2 1
3
1 2
3W
W-B
W-B
IE
W- B
W-B
W
1K5
1C7
3A17
3A16
I 9
3F20
1
9
1J
3
1J4
1K4
R-Y
R-G
A
24
1 1
3 13 2
3F16
AB
IG
I 9
W-B
W-B
A A
BC B B
AB
7 17
R- G
R- G
R-Y
R-G
JUNCTIONCONNECTOR
BJ 9 , J10A
1L14
1L13
BODYECU
R-W
R-W
2001 TOYOTA TACOMA (EWD440U)
95
HEAD RELAY2-1 : Closed with light control SW at HEAD position or dimmer SW at FLASH position
: PARTS LOCATION
Code See Page Code See Page Code See Page
C12 34H2
30 (5VZ-FE)J10 B
31 (5VZ-FE)
C14 34H2
32 (3RZ-FE, 2RZ-FE)J10 B
33 (3RZ-FE, 2RZ-FE)
H130 (5VZ-FE)
J9 A31 (5VZ-FE)
H132 (3RZ-FE, 2RZ-FE)
J9 A33 (3RZ-FE, 2RZ-FE)
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1C23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1J23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1K 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1L 22 Cowl Wire and J/B No.1 (Lower Finish Panel)
3A24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3F24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
96
HEADLIGHT (w/ DAYTIME RUNNING LIGHT)
16
OFF
TAIL
HEAD
LOW
HIGH
FLASH
DIM
ME
RS
WLI
GH
TC
ON
TR
OL
SW
2 22
1 2
3
1 2
3
1 1 1 1
3 3 2 2
L-R
B-Y L
2
10A
HE
AD
(LO
LH
)
10A
HE
AD
(H
I LH
)
10A
HE
AD
(LO
RH
)
10A
HE
AD
(H
I R
H)
G
2
2
4
21 3DIM
ME
R R
ELA
Y
1 3
2 4
IE
1 3
2 4
1
2
22
2 2
IF1
2
2 2
R- W
V- Y
G- Y
G- Y
W
R- G
B-Y
V
G-Y
G-Y
W-G
W-G
W
W-R L
W-R
V-Y
R- W
L
W-G W- G
8 7
BA
TTE
RY
DIO
DE
( DA
YT
IME
RU
NN
ING
LIG
HT
SY
ST
EM
)
D13
DA
YTI
ME
RU
NN
ING
LIG
HT
RE
LAY
NO
. 4
D 9
HE
AD
LIG
HT
RH
H 2
HE
AD
LIG
HT
LHH 1
HEADRELAY
C14COMBINATION SW
2
2
IF111
G- W
G-W
3A16 3A13
3A17
W- G
W- B
W- GW-B
B
BB
B
I 9W- B
W-B
W-B
7. 5ADRL
E 3
B-Y
B-Y
B- Y
B- Y
2
2
1
AA AA
BC
JUN
CT
ION
CO
NN
EC
TO
R
BJ
9A
, J1
0
V
G-Y
1L14
1L13
13
BO
DY
EC
U
JUNCTIONCONNECTOR
J 1
G- Y
R-G
1B7
1E4
1B
5
W-B
W- B
W-G
2001 TOYOTA TACOMA (EWD440U)
97
5
10AGAUGE
2
1
2
1
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IF16
R- W
V- Y
G- Y
W- B
B-R
V
G-Y
V-Y
W-B
W-B
G-W
G-W R
B-R
R-W Y
11
8 7 4 3 126 9
PA
RK
ING
BR
AK
E S
WP
4
BR
AK
E F
LUID
LE
VE
LW
AR
NIN
G S
W
B 2
HIG
H B
EA
M IN
DIC
AT
OR
LIG
HT
[CO
MB
. M
ETE
R]
2
L-R
1F1B4
5 10
EAIG
1D11
1E7
3F16
3F20
1
9
W- B
W- G
W-B
W-B
W-B
R-Y
W-B
C12
7. 5AECU- B
W-B
I 9W- B
1C7
1K5
EA13
1
YY
GENERATORG 2
I 9
W-B
3D12
3D19
BE
AD
L
JUNCTIONCONNECTOR
BJ 9 , J10A
V
1
W-G
DA
YTI
ME
RU
NN
ING
LIG
HT
RE
LAY
(M
AIN
)D
8
DRL PKB E IND BRK
HI H DIM H- LP +B IG CHG-
2001 TOYOTA TACOMA (EWD440U)
98
HEADLIGHT (w/ DAYTIME RUNNING LIGHT)
1. DAYTIME RUNNING LIGHT OPERATIONWhen the engine is started, voltage generated at TERMINAL L of the generator is applied to TERMINAL 9 of the daytimerunning light relay (Main).If the parking brake lever is pulled up (The parking brake SW on) at this time, the relay is not activated, so the daytimerunning light system does not operate. If the parking brake lever is then released (The parking brake SW off), a signal isinput to TERMINAL 11 of the relay. This activates the relay, so current flows from battery to the HEAD relay (Point side) toTERMINAL 4 of the DIMMER relay to TERMINAL 1 to HEAD (LO LH), (LO RH) fuse to TERMINAL 1 of the headlights toTERMINAL 3 to TERMINAL 1 of the daytime running light relay (Main) to TERMINAL 2 to GROUND. This causes headlightsto light up (Headlights light up dimmer than full brightness.).Once the daytime running light system operates and headlights light up, headlights remain on even if the parking brake leveris pulled up (The parking brake SW on).If the engine stalls and the ignition SW remains on, headlights remain lighted up even through current is no longer outputfrom TERMINAL L of the generator. If the ignition SW is then turned off, the headlights go off. If the engine is started with theparking brake lever released (The parking brake SW off), the daytime running light system operates and headlights light upwhen the engine starts.
2. HEADLIGHT OPERATIONWhen the light control SW is switched to HEAD position, current flows from the DRL fuse to TERMINAL 4 of the daytimerunning light relay No.4 to TERMINAL 3 to TERMINAL 1 of the diode to TERMINAL 2 to body ECU to TERMINAL 13 of thelight control SW to TERMINAL 16 to GROUND, activating the daytime running light relay No.4. Current then flows from theHEAD (LO LH), (LO RH) fuse to TERMINAL 1 of the headlights to TERMINAL 3 to TERMINAL 2 of the daytime running lightrelay No.4 to TERMINAL 1 to GROUND, causing headlights to light up at normal intensity.When the dimmer SW is switched to HIGH position, the signal from the dimmer SW is input to the daytime running light relay(Main). This activates the relay and current flows from TERMINAL 4 of the DIMMER relay to TERMINAL 2 to TERMINAL 4 ofthe daytime running light relay (Main), activating the DIMMER relay.This causes current to flow from TERMINAL 4 of the DIMMER relay to TERMINAL 3 to HEAD (HI LH), (HI RH) fuse toTERMINAL 2 of the headlights to TERMINAL 3 to TERMINAL 2 of the daytime running light relay No.4 to TERMINAL 1 toGROUND, causing headlights to light up at high beam.When the dimmer SW is switched to FLASH position, the daytime running light relay (Main) is activated and current flowsfrom TERMINAL 4 of the DIMMER relay to TERMINAL 2. Current from the DRL fuse flows TERMINAL 4 of the daytimerunning light relay No.4 to TERMINAL 3 to TERMINAL 1 of the diode to TERMINAL 2 to TERMINAL 8 of the dimmer SW toTERMINAL 16 to GROUND, and also flows from the HEAD (HI LH), (HI RH) fuse to TERMINAL 2 of the headlights toTERMINAL 3 to TERMINAL 2 of the daytime running light relay No.4 to TERMINAL 1 to GROUND, causing the high beam tooperate.
HEAD RELAY2-1 : Closed with light control SW at HEAD position or dimmer SW at FLASH position
Closed with engine running and parking brake lever released
DIMMER RELAY4-3 : Closed with HEAD relay on and dimmer SW at HIGH or FLASH position
: PARTS LOCATION
Code See Page Code See Page Code See Page
B230 (5VZ-FE)
G230 (5VZ-FE)
J9 A31 (5VZ-FE)
B232 (3RZ-FE, 2RZ-FE)
G232 (3RZ-FE, 2RZ-FE)
J9 A33 (3RZ-FE, 2RZ-FE)
C12 34H1
30 (5VZ-FE)J10 B
31 (5VZ-FE)
C14 34H1
32 (3RZ-FE, 2RZ-FE)J10 B
33 (3RZ-FE, 2RZ-FE)
D8 34H2
30 (5VZ-FE) P4 35
D9 34H2
32 (3RZ-FE, 2RZ-FE)
D13 34 J1 35
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
99
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1B
1C 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1D
( )
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1K 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1L 22 Cowl Wire and J/B No.1 (Lower Finish Panel)
3A
3D 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
( )
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EA140 (5VZ-FE)
Engine Room Main Wire and Engine No 2 Wire (Near the Battery)EA142 (3RZ-FE, 2RZ-FE)
Engine Room Main Wire and Engine No.2 Wire (Near the Battery)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
: GROUND POINTS
Code See Page Ground Points Location
EA40 (5VZ-FE)
Front Left FenderEA42 (3RZ-FE, 2RZ-FE)
Front Left Fender
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E340 (5VZ-FE)
Engine Room Main WireI9 44 Cowl Wire
E342 (3RZ-FE, 2RZ-FE)
Engine Room Main Wire
2001 TOYOTA TACOMA (EWD440U)
100
INTERIOR LIGHT
IG13
1 B
2 A
(*1)1 A(*2)2 B
2
B 1
7. 5AECU- IG
15ADOME
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1E2 1H10
DO
OR
ON
OF
F
L-Y
10 4
* 1 : REGULAR CAB* 2 : DOUBLE, EXTRA CAB
2
1
1 1
G-W G
B-W
B B
B
B
( *3)
(*1)(*2)
* 3 : W/ PERSONAL LIGHT
LH RH
1
I16 ,
INTERIORLIGHT
A B
1L111L41L10
11
Y-G ( *4)
Y-G ( *4)
DO
OR
CO
UR
TES
Y S
WR
EA
R R
H
D27
DO
OR
CO
UR
TES
Y S
WR
EA
R L
H
D26
Y-G ( *4)
11
PERSONALLIGHT
P 5
12
1H9
B-W
BODY ECU
DO
OR
CO
UR
TES
YS
W F
RO
NT
RH
D16
DO
OR
CO
UR
TES
YS
W F
RO
NT
LH
D15
IG12
B
* 4 : DOUBLE CAB* 5 : EXCEPT 5VZ- FE
I 1 : 5VZ- FEI 2 : *5
2001 TOYOTA TACOMA (EWD440U)
101
D15, D16, D26, D27 DOOR COURTESY SW FRONT REAR LH, RH1-GROUND : Closed with door open
C14 LIGHT CONTROL SW [COMB. SW]14-16 : Closed with light control SW at TAIL or HEAD position
TAIL RELAY3-5 : Closed with light control SW at TAIL or HEAD position
: PARTS LOCATION
Code See Page Code See Page Code See Page
A19 34 J10 B 33 (3RZ-FE, 2RZ-FE) R2 B 35
A25 34L1
36 (Double Cab) R3 35
C5 34L1
37 (Except Double Cab) R4 35
C13 34L2
36 (Double Cab)R6
36 (Double Cab)
C14 34L2
37 (Except Double Cab)R6
37 (Except Double Cab)
E4 35P2
31 (5VZ-FE)R7
36 (Double Cab)
G3 35P2
33 (3RZ-FE, 2RZ-FE)R7
37 (Except Double Cab)
H6 35P3
31 (5VZ-FE) R15 35
J9 A31 (5VZ-FE)
P333 (3RZ-FE, 2RZ-FE) S4 35
J9 A33 (3RZ-FE, 2RZ-FE) P19 35
J10 B 31 (5VZ-FE) R1 A 35
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F 23Cowl Wire and J/B No 1 (Lower Finish Panel)
1L 22Cowl Wire and J/B No.1 (Lower Finish Panel)
3A
3C 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
( )
3H26 Cowl Wire and J/B No 3 (Behind the Instrument Panel Center)
3I26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
BN146 (Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)BN148 (Except Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)
: GROUND POINTS
Code See Page Ground Points Location
EA40 (5VZ-FE)
Front Left FenderEA42 (3RZ-FE, 2RZ-FE)
Front Left Fender
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E340 (5VZ-FE)
Engine Room Main WireI9 44 Cowl Wire
E342 (3RZ-FE, 2RZ-FE)
Engine Room Main Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
105
MEMO
2001 TOYOTA TACOMA (EWD440U)
106
TURN SIGNAL AND HAZARD WARNING LIGHT
1D4 1D1 1D6 1H12
1J5 1F
1H5 1E12 1D3 1E11 1D7
1J
1C
1J
7 9 5 6 1 2 3
10 8
L-W
R-B
G-Y
G L-R
G-WG
-B
L-B
G
G-B G
G-Y
G-W
L- R
2
1
2
1
BN15
IE IG
BN18 BN110
3
1
6
1
I 9
C12
TU
RN
SIG
NA
L IN
DIC
AT
OR
LIG
HT
[CO
MB
. M
ETE
R]
3F16
3F20
G-R
G-B
G-B
G-Y
G-Y
G-Y
G-R
R-L
W-B
W-B
W-B
W-B
W-B
W- B
G-B
W-B
W-B
W-B
W-B
LH RH
HAZARDOFF
ONTURN
RH
LH
10ATURN
15AHORN. HAZ
FLASHERRELAY
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
HAZARD SWH 6
TURN SIGNAL SW [COMB. SW]C14
RE
AR
TU
RN
SIG
NA
LLI
GH
T LH
[RE
AR
CO
MB
. LI
GH
T LH
]
R 6
RE
AR
TU
RN
SIG
NA
LLI
GH
T R
H[R
EA
R C
OM
B.
LIG
HT
RH
]
R 7
W- B
3
2
1
1D5
2
5
6
10 8
1
IG
W-B
IF113
BE
AD AD AE AE
W-B
EA
FRONT TURNSIGNAL LIGHTRH
F 4FRONT TURNSIGNAL LIGHTLH
F 3
W-B
W-B
W- B
W-B
W-B
JUN
CTI
ON
CO
NN
EC
TOR
BJ
9A
, J1
0
1
1J8
3
W-B
2001 TOYOTA TACOMA (EWD440U)
107
FLASHER RELAY2-GROUND : Approx. 12 volts with ignition SW on or hazard SW on1-GROUND : Changes from 12 to 0 volts with ignition SW on and turn signal SW left or right, or with hazard SW on
The light auto turn off system automatically turns the taillight or headlight off according to the door open or close on thedriver’s side, and prevent failing to turn off the lights. If the ignition switch is turned to OFF from ON with the headlight or taillight is on, the signal is input in the body ECU. If thedriver’s seat door is opened at that time, the signal from the door courtesy SW front LH is sent to the body ECU. The signalturns the headlight or taillight off by the body ECU.
BODY ECU10-GROUND : Approx. 12 volts with ignition SW at ON or ST position
Code See Page Junction Block and Wire Harness (Connector Location)
1C 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1J 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1K 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1L 22 Cowl Wire and J/B No.1 (Lower Finish Panel)
3A 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
114
ELECTRONICALLY CONTROLLED TRANSMISSION (5VZ-FE)
11 1F
7. 5AIGN
20AEFI
2
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F
2
2 3
1 5
W-R
2 2
B- Y
2 2
IF17
W-R
B-O
W-B
W-R
B-Y
B-Y
IF115
G-Y
A16
EA
W B Y
1 2 3
6 14 13
I13
R-Y
LGLG
V
R-W
LG
LG-R
IK31
D8D7 D9 24 B B4
AE
21 3E
BD
3E22
3F6
3E20
3F7
A15 B20A1
G-W B-Y
G-W
B-Y
1
W-B
LG
W-B
ECT OD IDL
1
2
2
1
2 EE1
C15 C18 C14
1 EE1
I13I13
A/T
OIL
TE
MP
. S
EN
SO
RA
7
EN
GIN
E C
OO
LAN
TT
EM
P.
SE
NS
OR
E 3
G-R
Y-R
G-R
LG
LGB
R-B
LG LG
LG LG
CRUISE CONTROL ECUC17
ELE
CTR
ON
ICA
LLY
CO
NTR
OLL
ED
TR
AN
SM
ISS
ION
SO
LEN
OID
E 2
NO
. 1
NO
. 2
SL
EFIRELAY
IK38
A7
B-W
3E8
5 3E
IK221
9
6
N
P
PA
RK
/NE
UTR
AL
PO
SIT
ION
SW
P 1
B-W
B-WB-Y
B-Y
J 9
JUN
CTI
ON
CO
NN
EC
TOR
BA
, J1
0
+B BATT STP NSW STA OIL E2 THW
S1 S2 SL OD1 IDLO
ENGINE CONTROL MODULE
BE 5 , E 6A C, E 7 D, E 8
B-O
B-O
IF123
A8
MREL
B-W
B-W
B-Y
10ASTOP
A2
IGSW
2
1
2
ST
OP
LIG
HT
SW
S 5
3E2
3E1
7. 5ASTA
1F6
2001 TOYOTA TACOMA (EWD440U)
115
W- B
LG
C
3 2
23
1
C2
W-R
3
D22B2B3B12
EB
8
B22 B6
26 D D14 C17 D6 B10
1
2
I13
Y-R BR R
BR
BR
TE1
E1
V 1
VE
HIC
LE S
PE
ED
SE
NS
OR
( ELE
CT
RO
NIC
ALL
Y C
ON
TRO
LLE
D T
RA
NS
MIS
SIO
N)
I12
DATA LINKCONNECTOR 1
D 1
IGIE
3G22
3G17
W-B
L-O
W-B
W-B
W-B
L- O
W- B
5 1F
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
10AGAUGE
3D
19
3D13 3D18 3D20 3D16
LG
4
3D
5
3D
P
LG
G-OR
R- B
R-B G
G-BY
B- R
B- R
B- R
B- R
R
P
G
G- O
B- R
THROTTLE POSITIONSENSOR
T 1
B- R
SP2- SP2+ E1 TE1 ODLP
VTA VC PWRR2L SP1 ODMS
OILW
B7
O
O
ENGINE CONTROL MODULE
BE 5 , E 6A C, E 7 D, E 8
10
5
O/D MAIN SW[SHIFT LOCK CONTROL RELAY]
S 4
B17
L
L
B
B
JUN
CTI
ON
CO
NN
EC
TOR
J13
TFN
L
3D17
3B2
3B4
C
C
I 9
R-B
2001 TOYOTA TACOMA (EWD440U)
116
ELECTRONICALLY CONTROLLED TRANSMISSION (5VZ-FE)
IK2
16
L 2 D R P
8 4 7 2 1
3
2
3
A/T
OIL
TE
MP
.
D1 A5 A3
D6 C6
SP
EE
DO
ME
TER
CONTROLCIRCUIT
(*2)
( *1)
( *2)
O/D
OF
F
A13D4
D
DD
B-R V G
R-B
G G
B- R
PR
B- RB- R
B- R
B- R
R
P
R- B
G
PARK/NEUTRALPOSITION SW
P 1
A7 C1
B- R
E 4
ELE
CTR
ON
ICA
LLY
CO
NT
RO
LLE
D T
RA
NS
MIS
SIO
NP
AT
TER
N S
ELE
CT
SW
ID
O
L- O
O BR
W-B
BR
A/T
P
EC
T P
WR
NO
RM
PW
R
3B17
3B19
A8 A2
IK220 IK26
L
G-R
2 3
L
G-R
VEHICLE SPEEDSENSOR
V10
1
W- B
(*2)
( *1)
( *1)
V
7 IK3
CO
MB
INA
TIO
N M
ETE
R
CC
10A
, C
12D
, C
13
2
1
D5
L-R
V
IK35 IK34 IK22 IK32R P
G- O
B-R
L
L
DIO
DE
(A
/T)
D25
JUN
CTI
ON
CO
NN
EC
TOR
J11
R-B
L-O
TO CRUISECONTROL ECU
B-W
IK215
P
B-R
P
* 1 : W/ TACHOMETER* 2 : W/O TACHOMETER
3F20
3F16
W-B
2001 TOYOTA TACOMA (EWD440U)
117
Previous automatic transmissions have selected each gear shift using mechanically controlled throttle hydraulic pressure,governor hydraulic pressure and lock-up hydraulic pressure. The electronically controlled transmission, however, electricallycontrols the governor pressure and lock-up sensor through the solenoid valve. Control of the solenoid valve by the enginecontrol module based on the input signals from each sensor makes smooth driving possible by shift selection for each gearwhich is most appropriate to the driving conditions at that time.
1. GEAR SHIFT OPERATIONDuring driving, the engine control module selects the shift for each gear which is most appropriate to the driving conditions,based on input signals from the engine coolant temp. sensor to TERMINAL THW of the engine control module and also theinput signals to TERMINAL SP2+ of the engine control module from the vehicle speed sensor devoted to the electronicallycontrolled transmission. Current is then output to the electronically controlled transmission solenoid. When shifting to 1stspeed, current flows from TERMINAL S1 of the engine control module to TERMINAL 1 of the electronically controlledtransmission solenoid to GROUND, and continuity to the No.1 solenoid causes the shift.For 2nd speed, current flows from TERMINAL S1 of the engine control module to TERMINAL 1 of the electronicallycontrolled transmission solenoid to GROUND, and from TERMINAL S2 of the engine control module to TERMINAL 2 of theelectronically controlled transmission solenoid to GROUND. And continuity to solenoid No.1 and No.2 causes the shift.For 3rd speed, there is no continuity to No.1 solenoid, only to No.2 causing the shift. Shifting into 4th speed (Overdrive)takes place when there is no continuity to either No.1 or No.2 solenoid.
2. LOCK-UP OPERATIONWhen the engine control module judges from each signal that lock-up operation conditions have been met, current flowsfrom TERMINAL SL of the engine control module to TERMINAL 3 of the electronically controlled transmission solenoid toGROUND, causing continuity to the lock-up solenoid and causing lock-up operation.
3. STOP LIGHT SW CIRCUITIf the brake pedal is depressed (Stop light SW on) when driving in lock-up condition, a signal is input to TERMINAL STP ofthe engine control module, the engine control module operates and continuity to the lock-up solenoid is cut.
4. OVERDRIVE CIRCUIT∗ O/D main SW on
When the O/D main SW is turned on, a signal is input to TERMINAL ODMS of the engine control module and enginecontrol module operation causes gear shift when the conditions for overdrive are met.
∗ O/D main SW offWhen the O/D main SW is turned off, a signal is input into TERMINAL ODMS of the engine control module, and turns onthe O/D off indicator light. This activates the ECU, and the transmission system is controlled not to shift to overdrive.
5. A/T OIL TEMP. WARNINGWhen the A/T oil temp. sensor affixed to the transmission case detects that the fluid temp. is 150°C (302°F) or more, theengine control module operates and the current flowing through the GAUGE fuse flows to the A/T oil temp. warning light toTERMINAL OILW of the engine control module to GROUND, so that the warning light lights up, informing that the oil temp. ishigh. When the oil temp. drops to 120°C (248°F) or less, the engine control module stops operating and the warning lightgoes out.
2-E1 : 10- 14 volts with shift lever at 2 position: 0- 2 volts with shift lever at except 2 position
L-E1 : 10- 14 volts with shift lever at L position: 0- 2 volts with shift lever at except L position
OILW-E1 : 0.1- 4.9 volts+B-E1 : 9- 14 volts
BATT-E1 : 9- 14 volts
: PARTS LOCATION
Code See Page Code See Page Code See Page
A7 30 (5VZ-FE) E3 30 (5VZ-FE) J11 35
C10 A 34 E4 35 J13 35
C12 C 34 E5 A 35 P1 31 (5VZ-FE)
C13 D 34 E6 B 35 S4 35
C17 34 E7 C 35 S5 35
D1 30 (5VZ-FE) E8 D 35 T1 31 (5VZ-FE)
D25 34 J9 A 31 (5VZ-FE) V1 31 (5VZ-FE)
E2 30 (5VZ-FE) J10 B 31 (5VZ-FE) V10 31 (5VZ-FE)
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3B
3D24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3E24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
3G 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
119
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EE1 40 (5VZ-FE) Engine Wire and Sensor Wire (Over the Cylinder Head)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK244 Engine Wire and Cowl Wire (Above the Glove Box)
IK344 Engine Wire and Cowl Wire (Above the Glove Box)
: GROUND POINTS
Code See Page Ground Points Location
EA 40 (5VZ-FE) Front Left Fender
EB 40 (5VZ-FE) Near the Throttle Body
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I944 Cowl Wire
I13 44 Engine Wire
I1244 Cowl Wire
2001 TOYOTA TACOMA (EWD440U)
120
ELECTRONICALLY CONTROLLED TRANSMISSION (3RZ-FE)
11 1F
7. 5AIGN
20AEFI
2
10ASTOP
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F
2
2 3
1 5
W-R
2 2
B- Y
2 2
IF17
W-R
B-O
W-B
B-Y
B-Y
IF115
G-Y
A16
EA
W B Y
1 2 3
6 14 13
I13
R-Y
LGLG
V
R-W
LG
LG-R
IK31
D8D7 D9 11 A B5
C17CRUISE CONTROL ECU
AE
BD
3E223F6
3E203F7
A15
21
A22
3E
A1
B-W
G-W
7
B-Y
G-W
B-Y
A
1
W-B
LG
W-B
ECT OD IDL
1
2
2
1
D26 C18 C12
I13I13
A/T
OIL
TE
MP
. S
EN
SO
RA
7
EN
GIN
E C
OO
LAN
TT
EM
P.
SE
NS
OR
E 3
G-R
Y-R LG
LGLG LG
LG LG
ELE
CTR
ON
ICA
LLY
CO
NTR
OLL
ED
TR
AN
SM
ISS
ION
SO
LEN
OID
E 2
LG-R
NO
. 1
NO
. 2
SL
EFIRELAY
IK222
B-W
IK38
3E8
3E5
21 IK2
P
N
9
B- Y
6
B-WB-Y
B-Y
PA
RK
/NE
UT
RA
LP
OS
ITIO
N S
W
P 1
W-R
ENGINE CONTROL MODULE
BE 5 , E 6A
+B BATT STP NSW STA THO E2 THW
S1 S2 SL OD1 IDLO
C, E 7 D, E 8
JUN
CTI
ON
CO
NN
EC
TOR
BJ
9A
, J1
0
7. 5ASTA
1F62
1
2
STOP LIGHTSW
S 5
3E2
3E1
IF123
B-O
B7
13
DATA LINKCONNECTOR 3
D 7
TC
TC
R
IK25
R
2001 TOYOTA TACOMA (EWD440U)
121
L- O
LG
C
3 2
9
1
C2
W-R
A17 A2 A3 A4
EF
A21 A10
23 B B14 C17 A5
1
2
Y-R BR
BR
V 1
VE
HIC
LE S
PE
ED
SE
NS
OR
( ELE
CT
RO
NIC
ALL
Y C
ON
TRO
LLE
D T
RA
NS
MIS
SIO
N) I12
IGIE
3G22
3G17
O/D MAIN SW[SHIFT LOCK CONTROL RELAY]
S 4
5
10
W-B
O( 4
WD
)
W-B
W-B
W-B
O(4WD)
W- B
5 1F
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
10AGAUGE
3D
19
3D13 3D18 3D20 3D16
P
L-B
4
3D
5
3D
L-O
G-OPR
R
R-BGG-YY
B- R
B- R
B- R
B- R
G
R- B
P
G- O
B- R
THROTTLE POSITIONSENSOR
T 1
3D17
PR
IK35 IK34
2 3B
3B4
IK22
R-B
R-B
IK215B- R
W- B
VTA VC PWR R L 2 SP1 ODLP
OILWE1SP2+SP2-
E 8, DE 7, CA E 6, E 5 B
ENGINE CONTROL MODULE
IK310
L-O
ODMS
B25
L-B
L-B
C
C
A9
JUN
CTI
ON
CO
NN
EC
TOR
J13
L
L
TFN
B
B
JUN
CTI
ON
CO
NN
EC
TOR
J13
I 9
2001 TOYOTA TACOMA (EWD440U)
122
ELECTRONICALLY CONTROLLED TRANSMISSION (3RZ-FE)
IK2
16
L 2 D R P
8 4 7 2 1
3
2
3
A/T
OIL
TE
MP
.
D1 A5 A3
TO
CR
UIS
E C
ON
TRO
L E
CU
B-R
2 IK3
2 A
1
8 A
LP
D6 C6
SP
EE
DO
ME
TE
R
CONTROL CIRCUIT
( *2) ( *
1)
( *2)
O/D
OFF
D5
A13D4
D
DD
B-R V G
R-B
G G
V
B- R
B-WPR
B- RB- R
B- R
B- R
G
R- B
P
R
G- O
G-O
PARK/NEUTRALPOSITION SW
P 1
ELE
CTR
ON
ICA
LLY
CO
NTR
OLL
ED
TR
AN
SM
ISS
ION
PA
TTE
RN
SE
LEC
T S
W
E 4
JUN
CT
ION
CO
NN
EC
TO
R
J11
A7 C1
3F
20
3B1917
3B
3F
16
ID
L- O
W- B
O(4WD)
W- B
BR
O( 4
WD
)
BR
W-B
BR
A/T
P
EC
T P
WR
( *1)
* 1 : W/ TACHOMETER* 2 : W/O TACHOMETER
NO
RM
PW
R
W- B
BR
32
G-R
L
G-R
P
VEHICLE SPEEDSENSOR
V10
IK220 IK26
(*2)
( *1)
COMBINATION METER
CC10 , C12A D, C13
2
1
DIO
DE
(A
/T)
D25
L-R
L
L
L-O
2001 TOYOTA TACOMA (EWD440U)
123
Previous automatic transmissions have selected each gear shift using mechanically controlled throttle hydraulic pressure,governor hydraulic pressure and lock-up hydraulic pressure. The electronically controlled transmission, however, electricallycontrols the governor pressure and lock-up pressure through the solenoid valve. Control of the solenoid valve by the enginecontrol module based on the input signals from each sensor makes smooth driving possible by shift selection for each gearwhich is most appropriate to the driving conditions at that time.
1. GEAR SHIFT OPERATIONDuring driving, the engine control module selects the shift for each gear which is most appropriate to the driving conditions,based on input signals from the engine coolant temp. sensor to TERMINAL THW of the engine control module, and also theinput signals to TERMINAL SP2+ of the engine control module from the vehicle speed sensor devoted to the electronicallycontrolled transmission. Current is then output to the electronically controlled transmission solenoid. When shifting to 1stspeed, current flows from TERMINAL S1 of the engine control module to TERMINAL 1 of the electronically controlledtransmission solenoid to GROUND, and continuity to the No.1 solenoid causes the shift.For 2nd speed, current flows from TERMINAL S1 of the engine control module to TERMINAL 1 of the electronicallycontrolled transmission solenoid to GROUND, and from TERMINAL S2 of the engine control module to TERMINAL 2 of theelectronically controlled transmission solenoid to GROUND, and continuity to solenoid No.1 and No.2 causes the shift.For 3rd speed, there is no continuity to No.1 solenoid, only to No.2 causing the shift. Shifting into 4th speed (Overdrive)takes place when there is no continuity to either No.1 or No.2 solenoid.
2. LOCK-UP OPERATIONWhen the engine control module judges from each signal that lock-up operation conditions have been met, current flowsfrom TERMINAL SL of the engine control module to TERMINAL 3 of the electronically controlled transmission solenoid toGROUND, causing continuity to the lock-up solenoid and causing lock-up operation.
3. STOP LIGHT SW CIRCUITIf the brake pedal is depressed (Stop light SW on) when driving in lock-up condition, a signal is input to TERMINAL STP ofthe engine control module, the engine control module operates and continuity to the lock-up solenoid is cut.
4. OVERDRIVE CIRCUIT∗ O/D main SW on
When the O/D main SW is turned on, a signal is input to TERMINAL ODMS of the engine control module and enginecontrol module operation causes gear shift when the conditions for overdrive are met.
∗ O/D main SW offWhen the O/D main SW is turned off, a signal is input into TERMINAL ODMS of the engine control module, and turns onthe O/D off indicator light. This activates the ECU, and the transmission system is controlled not to shift to overdrive.
With the ignition SW turned to on, current flows from GAUGE fuse to TERMINAL 1 of the cruise control indicator light andfrom ECU-IG fuse to TERMINAL B of the cruise control ECU. When the ignition SW is on and the cruise control SW isturned on, a signal is input from TERMINAL 5 of the cruise control SW to TERMINAL CCS of the cruise control ECU. As aresult, the cruise control ECU functions and the current to TERMINAL B of the cruise control ECU flows to TERMINAL GNDto GROUND, and the cruise control system is ready for operation.At the same time, the current from the GAUGE fuse flows to TERMINAL 1 of the cruise control indicator light to TERMINAL 8to TERMINAL Pi of the cruise control ECU to TERMINAL GND to GROUND, causing the cruise control indicator light to lightup, indicating that the cruise control is ready for operation.
1. SET OPERATIONWhen the cruise control main SW is turned on and the set SW is pushed with the vehicle speed within the set limit (Approx.40 km/h, 25 mph to 200 km/h, 124 mph), a signal is input to TERMINAL CCS of the cruise control ECU and the vehiclespeed at the time the set SW is released is memorized in the ECU as the set speed.
2. SET SPEED CONTROLDuring cruise control driving, the ECU compares the set speed memorized in the ECU with the actual vehicle speed inputinto TERMINAL SPD of the cruise control ECU from the speedometer, and controls the cruise control actuator to maintainthe set speed.When the actual vehicle speed is lower than the set speed, the ECU causes the current to the cruise control actuator to flowfrom TERMINAL MO of the cruise control ECU to TERMINAL 1 of the cruise control actuator to TERMINAL 2 to TERMINALMC of the cruise control ECU. As a result, the motor in the cruise control actuator is rotated to open the throttle valve and thethrottle cable is pulled to increase the vehicle speed.When the actual vehicle speed is higher than the set speed, the current to the cruise control actuator flows from TERMINALMC of the ECU to TERMINAL 2 of the cruise control actuator to TERMINAL 1 to TERMINAL MO of the cruise control ECU.This causes the motor in the cruise control actuator to rotate to close the throttle valve and return the throttle cable todecrease the vehicle speed.
3. COAST CONTROLDuring cruise control driving, while the coast SW is on, the cruise control actuator returns the throttle cable to close thethrottle valve and decrease the driving speed. The vehicle speed when the coast SW is turned off is memorized and thevehicle continues at the new set speed.
4. ACCEL CONTROLDuring cruise control driving, while the accel SW is turned on, the cruise control actuator pulls the throttle cable to open thethrottle valve and increase the driving speed.The vehicle speed when the accel SW is turned off is memorized and the vehicle continues at the new set speed.
5. RESUME CONTROLUnless the vehicle speed falls below the minimum speed limit (Approx. 45 km/h, 25 mph) after canceling the set speed bythe cancel SW, pushing the resume SW will cause the vehicle to resume the vehicle speed set before cancellation.
6. MANUAL CANCEL MECHANISMIf any of the following operations occurs during cruise control operation, the magnetic clutch of the actuator turns off and themotor rotates to close the throttle valve and the cruise control is released.∗ Placing the shift lever in except D position (A/T) or cruise control clutch SW off (M/T). ”A Signal is not input to TERMINAL D
of the ECU”∗ Depressing the brake pedal (Stop light SW on). ”A Signal is input to TERMINAL STP- of the ECU”∗ Pushing the cancel SW (Cancel SW on). ”A Signal is input to TERMINAL CCS of the ECU”
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
133
7. AUTO CANCEL FUNCTION
A) If any of the following operating conditions occurs during cruise control operation, the set speed is erased, the currentflowing to the magnetic clutch is stopped and the cruise control is released (Cruise SW turns off).When this occurs, the ignition SW must be turned off once before the main SW will turn on.
∗ Over current to transistor driving motor and/or magnetic clutch.∗ Current to control the throttle valve in motor becomes always ON.∗ Open circuit in magnetic clutch.∗ Momentary interruption of vehicle speed signal∗ Short circuit in cruise control SW.∗ Motor does not operate despite the motor drive signal being output.
B) If any of the following conditions occurs during cruise control operation, the set speed is erased and the cruise control isreleased. (The power of magnetic clutch is cut off until the set SW is ON again.)
∗ When the vehicle speed falls below the minimum speed limit (approx. 40 km/h, 25 mph)∗ When the vehicle speed falls more than 16 km/h (10 mph) below the set speed, E.G. on an upward slope.∗ When power to the cruise control system is momentarily cut off.
C) If any of the following condition occurs during cruise control operation, the cruise control is released. But in this case, theset speed is not erased. If the vehicle speed is more than the minimum speed limit (Approx. 40 km/h, 25 mph), cruisecontrol operation is possible using SET or RESUME on the control SW.
∗ Open circuit between TERMINAL L of the cruise control ECU and TERMINAL 3 of the stop light SW.
C17 CRUISE CONTROL ECU16-GROUND : Always continuity
9-GROUND : Approx. 12 volts with ignition SW at ON position12-GROUND : 4 pulse with 1 rotation of the rotor shaft
2-GROUND : Approx. 12 volts with brake pedal depressed (One of the cancel SW)
C19 CRUISE CONTROL SW [COMB. SW]5-4 : Approx. 68 Ω with RESUME/ACCEL SW on
Approx. 198 Ω with SET/COAST SW onApprox. 418 Ω with CANCEL SW on
C3 CRUISE CONTROL ACTUATOR3-4 : Approx. 38.5 Ω
: PARTS LOCATION
Code See Page Code See Page Code See Page
C330 (5VZ-FE)
D130 (5VZ-FE)
A31 (5VZ-FE)
C332 (3RZ-FE, 2RZ-FE)
D132 (3RZ-FE, 2RZ-FE) P1
A33 (3RZ-FE)
C10 34 E5 A 35 B 33 (2RZ-FE)
C13 34 E6 B 35 S5 35
C16 34 E8 D 35V10
31 (5VZ-FE)
C17 34 J11 35V10
33 (3RZ-FE, 2RZ-FE)
C19 34 O6 35
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1F23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1G23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3B
3D24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3E24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
3H 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
134
CRUISE CONTROL
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IK244 Engine Wire and Cowl Wire (Above the Glove Box)
IK344 Engine Wire and Cowl Wire (Above the Glove Box)
: GROUND POINTS
Code See Page Ground Points Location
EB 40 (5VZ-FE) Near the Throttle Body
EF 42 (3RZ-FE, 2RZ-FE) Ignition Coil Braket
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I944 Cowl Wire
I17 44 Cowl Wire
I1444 Cowl Wire
2001 TOYOTA TACOMA (EWD440U)
135
MEMO
2001 TOYOTA TACOMA (EWD440U)
136
ABS
60A ABS
1
2
2
2
EF12 EF11
10AGAUGE
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F5
3D19
3D16
9
1
7. 5AECU- IG
1G1
3H4
3H2
1 17 10 6
IF24 IF210
2 1
IF22 IF26 BN69 BN610
12 12
9 8 23 22 5 4
Y BR P L R G
GR
BW
LPBRY
BO21BO22
FL+ FR+FL- FR- RL+ RL-
WB B B B
B-L
B-R
B-R
Y-R
Y-R
BB
+BS +BM WA IG1
FRONT ABS SPEEDSENSOR LH
F 1FRONT ABS SPEEDSENSOR RH
F 2REAR ABS SPEEDSENSOR LH
R11
C13
AB
S W
AR
NIN
G L
IGH
T[C
OM
B.
ME
TER
]
ABS ACTUATOR WITH ECUA22
BATTERY
ABSINVERTER
3H
1
BN63 BN68
A
A
3B2 3B3
3B1
L- Y
L- Y
Y- R
Y- R
(*3)
(*3)
L-Y
L-Y
L-Y
L-Y
( M/T
)( M
/T *
3)
( A/T
*3)
( A/T
)
(M/T *2)
(A/T *2)
JUN
CTI
ON
CO
NN
EC
TOR
J13
7
EXI
2001 TOYOTA TACOMA (EWD440U)
137
12
BN67 BN66
BO24 BO23
EC
IK218
EB
C
C
3I6
3I7
10ASTOP
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F2
GST GS1 GS2 EXI2
GND GND TS TCRR+ RR-
E1
TCTS
L-R
L-W
LG
GR
G-Y
B WWB
W B
W-B
W-B
Y-B
Y-B
G-W
R-Y
R-Y
Y-B
BR
GR
19 20 18 2 21 12
3
1 2 3
16 11
25 1113 14
REAR ABS SPEEDSENSOR RH
R12
ABS DECELERATIONSENSOR (4WD)
A 9
DATA LINKCONNECTOR 1
D 1
ABS ACTUATOR WITH ECUA22
(4W
D A
ND
PR
E-R
UN
NE
R)
( 4W
D A
ND
PR
E-R
UN
NE
R)
( 4W
D A
ND
PR
E-R
UN
NE
R)
GST GS1 GS2
JUN
CTI
ON
CO
NN
EC
TOR
J11
IK217
1
2
ST
OP
LIG
HT
SW
S 5
STP
24
3F7
3F4
G-W
IK226
2
1
IK24
3F12
3F16
W-B
W-B
IE IG
I 9
W-B
W-B
W-B
GR
GR
DE
TEC
TIO
N S
W( T
RA
NS
FE
R L
4 P
OS
ITIO
N)
D 3
EF
BR
( 5V
Z-FE
)
( *1)
* 1 : 3RZ- FE, 2RZ- FE
1
RLP
L- Y
L- Y
* 2 : W/ REAR DIFF. LOCK* 3 : W/O REAR DIFF. LOCK
(M/T *2)
(A/T *2)
REAR DIFF. LOCK ECUR16
2001 TOYOTA TACOMA (EWD440U)
138
ABS
This system controls the respective brake fluid pressures acting on the disc brake cylinders of the right front wheel, left frontwheel, and rear wheels when the brakes are applied in a panic stop so that the wheels do not lock.This results in improved directional stability and steerability during panic braking.
1. INPUT SIGNAL(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+ and RR+ of the ABS actuator with ECU.(2) Stop light SW signal
A signal is input to TERMINAL STP of the ABS actuator with ECU when the brake pedal is depressed.(3) Deceleration sensor signal (4WD)
Longitudinal acceleration is detected and a signal is input to the ABS actuator with ECU.
2. SYSTEM OPERATIONDuring sudden braking, the ABS actuator with ECU which has signals input from each sensor lets the hydraulic pressureacting on each wheel cylinder escape to the reservoir.The pump inside the ABS actuator with ECU is also operating at this time and it returns the brake fluid from the reservoir tothe master cylinder, thus preventing locking of vehicle wheels.If the ABS actuator with ECU judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current actingon the solenoid is controlled and the hydraulic pressure is increased.Holding of the hydraulic pressure is also controlled by the ECU, by the same method as above, by repeated pressurereduction. Holding and increase are repeated to maintain vehicle stability and to improve steerability during sudden braking.
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1H 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
142
MEMO
2001 TOYOTA TACOMA (EWD440U)
143
SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionaryinstructions and the procedure and precautions in the Repair Manual for the applicable model year.
Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of informationwhen troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
Work must be started after 90 seconds from when the ignition switch is turned to the ”LOCK” position and thenegative (-) terminal cable is disconnected from the battery.(The SRS is equipped with a back-up power source so that if work is started within 90 seconds fromdisconnecting the negative (-) terminal cable of the battery, the SRS may be deployed.)
When the negative (-) terminal cable is disconnected from the battery, the memory of the clock and audio system will becanceled. So before starting work, make a record of the contents memorized in the audio memory system. When work isfinished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in eachmemory system, never use a back-up power supply from outside the vehicle.
Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
Do not expose the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensorassembly or front airbag sensor assembly directly to hot air or flames.
Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbagassembly, seat belt pretensioner, center airbag sensor assembly and front airbag sensor assembly should be inspected.
Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
Never disassemble and repair the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, centerairbag sensor assembly or front airbag sensor assembly in order to reuse it.
If the steering wheel pad, front passenger airbag assembly, seat belt pretensioner, center airbag sensor assembly orfront airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case, bracket orconnector, replace them with new ones.
Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s electrical circuits.
Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.
After work on the SRS is completed, perform the SRS warning light check.
If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the RepairManual.
2001 TOYOTA TACOMA (EWD440U)
144
SRS
B-W
3 1M
2
3H14 3H16
1M2 1M4
3H15
ID IH
5 11
5
SPIRALCABLE
1
4
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
DATA LINK CONNECTOR 1D 1
AB TC
SR
S W
AR
NIN
G L
IGH
T[C
OM
B.
ME
TE
R]
C12
AIRBAG SQUIB(STEERING WHEEL PAD)
A18
GR
-R
R-W
P-B
P-B
Y-B
Y-B
BR
BR
IK219 IK218
Y-B
P-B
Y
1G12
3G6
3G5
1
2
W-B
W-B
4
PA
SS
EN
GE
R A
IRB
AG
MA
NU
AL
ON
/OFF
IN
DIC
ATO
R
P19
P20
PA
SS
EN
GE
R A
IRB
AG
MA
NU
AL
ON
/OFF
SW
B
3G16
3G17
IE
1
1
32
2
B
B
7
WW
SIL
JUNCTIONCONNECTOR
J11
B
B6 B5 B3 B19
15AACC
7. 5AIGN
7. 5AECU- B
C
C
JUNCTIONCONNECTOR
J1121 21
B26 B15 B20 B9
IF32 IF31
BR
W-R
BR
W-R
BR
-W
B-L
FRONT AIRBAGSENSOR LH
F 9FRONT AIRBAGSENSOR RH
F10
27 B28 B12B11 B10 14 B13
P21PRETENSIONER LH
21
C2 C1
P22PRETENSIONER RH
21
A5 A6
L G Y-B Y Y-B Y
* 2 : EXCEPT DOUBLE CAB* 1 : DOUBLE CAB
E1 E2 SILP- P+ D+ D- PL+ PL- PR+ PR-
ACC IG2 LA TC - SL +SL - SR +SR
A21AIRBAG SQUIB(FRONT PASSENGER AIRBAG ASSEMBLY)
DATA LINKCONNECTOR 3
D 7
CENTER AIRBAG SENSOR ASSEMBLY
BC20 , C21A C, C22
L-O
( *2)
L-O
( *2)
L-O
( *2)
( *2)
G-W ( *2)
GR
( *2)
LG ( *2)
G-R
( *2)
( *2)
2001 TOYOTA TACOMA (EWD440U)
145
A21AIRBAG SQUIB(FRONT PASSENGER AIRBAG ASSEMBLY)
12
B10 B11
P+ P-
LG ( *1)
G-R
( *1)
C11
3A16
3A18
1
2
3F1
3F3
I 9
IE IG
LG-B
W-B
W-B
W-B
W-B
LG-B
LBE+
BUCKLESW LH
B 6
CE
NTE
R A
IRB
AG
SE
NS
OR
AS
SE
MB
LY
BC
20A
, C
21C
, C
22
2001 TOYOTA TACOMA (EWD440U)
146
SRS
The SRS is a driver protection device which has a supplemental role to the seat belts.When the ignition SW is turned to ACC or ON, the current from the ACC fuse flows to TERMINAL (B) 6 of the center airbagsensor assembly. Only when the ignition SW on, the current from the IGN fuse flows to TERMINAL (B) 5 of the center airbagsensor assembly.If an accident occurs while driving, deceleration caused by a frontal impact is detected (by sensor) and when the frontalimpact exceeds a set level, the current from the ACC or IGN fuse flows to TERMINALS (B) 6 or (B) 5 of the center airbagsensor assembly. This current flows to TERMINAL (B) 14 to TERMINAL 1 of the airbag squib (Steering wheel pad) toTERMINAL 2 to TERMINAL (B) 13 of the center airbag sensor assembly, and also flows to TERMINAL (B) 10 of the centerairbag sensor assembly to TERMINAL 2 of the airbag squib (Front passenger airbag assembly) to TERMINAL 1 of thecenter airbag assembly (Double cab) or TERMINAL (B) 10 of the center airbag sensor assembly to TERMINAL 1 of thepassenger airbag manual on/off SW to TERMINAL 3 to TERMINAL 1 of the airbag squib (Front passenger airbag assembly)to TERMINAL 2 to TERMINAL 2 of the passenger airbag manual on/off SW to TERMINAL 4 to TERMINAL (B) 11 of thecenter airbag sensor assembly (Except double cab). Furthermore, the current flows to TERMINAL (B) 27 or (B) 28 toGROUND, causing the center airbag squibs to expand.When the safing sensor built into the center airbag sensor assembly is on, airbag sensor is off and the current from the ACCor IGN fuse flows same as above-mentioned flowing, causing the airbag squibs to expand. When the safing sensor built intothe center airbag sensor assembly is on, the airbag sensor on one of the above-mentioned circuits is activated so thatcurrent flows to the airbag squibs and causes them to operate.The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.The airbag stored inside the passenger’s instrument panel is instantaneously expanded to soften the shock to thepassenger.
1. FRONT PASSENGER AIRBAG MANUAL ON/OFF OPERATION (EXCEPT DOUBLE CAB)When the passenger airbag manual on/off SW is on, the current flowing from the ACC or IGN fuse to the airbag squib (Frontpassenger airbag assembly) is same as above, causing the airbag squib (Front passenger airbag assembly) to expand in anaccident.If the passenger airbag manual on/off SW is turned to off, the current flows from the ACC fuse to TERMINAL 1 of thepassenger airbag manual on/off indicator to TERMINAL 2 to GROUND, lighting the indicator up. Then the current betweenTERMINAL (B) 11 of the airbag sensor assembly and the airbag squib (Front passenger airbag assembly) is cut off, so that itdoes not expand the airbag squib (Front passenger airbag assembly) in an accident.
: PARTS LOCATION
Code See Page Code See Page Code See Page
A18 34D1
30 (5VZ-FE) P19 35
A21 34D1
32 (3RZ-FE, 2RZ-FE) P20 35
B636 (Double Cab) D7 34
P2136 (Double Cab)
B637 (Except Double Cab)
F930 (5VZ-FE)
P2137 (Except Double Cab)
C12 34F9
32 (3RZ-FE, 2RZ-FE)P22
36 (Double Cab)
C20 A 34F10
30 (5VZ-FE)P22
37 (Except Double Cab)
C21 B 34F10
32 (3RZ-FE, 2RZ-FE)
C22 C 34 J11 35
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1G23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1M23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3A24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3F24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3G26 Cowl Wire and J/B No 3 (Behind the Instrument Panel Center)
3H26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF3 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK2 44 Engine Wire and Cowl Wire (Above the Glove Box)
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
147
: GROUND POINTS
Code See Page Ground Points Location
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
IH 44 Right Kick Panel
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
The 4WD ECU operates the 2-4 select motor in accordance with the conditions of the 2-4 select SW, the detection SW(Transfer 4WD position) and the detection SW (Transfer L4 position). It also controls the range over which shifting from H2 toH4 is possible based on the vehicle speed sensor. If the 2-4 select SW is pushed in while shifting is prohibited, it causes the4WD indicator light to flash and sounds a warning buzzer to inform the driver. The warning buzzer is built into the ECU. Theoperation of the ECU is as follows.
2-4 SELECT SYSTEMThe 2-4 select system selects between 2WD and 4WD by means of a 2-4 select SW located in the transfer shift lever knobwhich provides good operability.This system uses an ECU which drives the 2-4 select motor in accordance with signals from various sensors andaccomplishes shifting between 2WD and 4WD. Shifting between H4 to L4 is accomplished by operating the transfer shiftlever as before. This system also permits shifting between H2 and H4 without first shifting to H4. All models equipped with2-4 select system are also equipped with the add, explained later.(1) Shifting from H4 to H2
When the 2-4 select SW is turned off, a signal is input to the 2-4 select motor from the 4WD ECU, activating the 2-4select motor so that the transfer changes to 2WD (H2 position).At this time, the detection SW (Transfer 4WD position) and ADD indicator SW are off, so the 4WD indicator light goes off.
(2) Shifting from H2 to H4 (During normal driving)When the 2-4 select SW is turned on, a signal is input to the 2-4 select motor from the 4WD ECU, activating the 2-4select motor so that the transfer changes to 4WD (H4 position)
(3) Shifting from H2 to H4 (High speed driving)The vehicle speed within below approx. 100 km/h, 62 mph, activating the 2-4 select motor so that the transfer changesto 4WD (H4 position)The 4WD ECU stops the signal to the 2-4 select motor with the signal from the vehicle speed sensor. At the same time,it causes the 4WD indicator light to light up and the warning buzzer inside the 4WD ECU to sound.
(4) Shifting to L4When the transfer shift lever is moved to L4 position, the transfer changes to LO position. This turns the detection SW(Transfer L4 position) on, so regardless of whether the 2-4 select SW is on or off, a signal is input to the 2-4 selectmotor from the 4WD ECU, activating the 2-4 select motor so that the transfer changes to 4WD (L4 position) in LOcondition.
F6 4WD ECU12-GROUND : Approx. 12 volts with ignition SW at ON position25-GROUND : Always continuity
3-GROUND : 4 pulses with 1 rotation4-GROUND : 2 volts or less with 2-4 select SW on
18-GROUND : 2 volts or less with detection SW (Transfer L4 position) on and transfer shift lever at L4 position
T3 2-4 SELECT SW1-2 : Closed with 2-4 select SW on
P1 A/T INDICATOR SW [PARK/NEUTRAL POSITION SW]3-1 : Closed with A/T shift lever at P position
: PARTS LOCATION
Code See Page Code See Page Code See Page
A22 30 (5VZ-FE) D5 30 (5VZ-FE) R16 35
A24 30 (5VZ-FE) D25 34 T2 31 (5VZ-FE)
C10 34 E6 35 T3 35
C13 34 F6 35 V10 31 (5VZ-FE)
D3 30 (5VZ-FE) J13 35
D4 30 (5VZ-FE) P1 31 (5VZ-FE)
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
152
4WD (w/ 2-4 SELECT SW)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1F23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1J23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3A
3B24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3D24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
3G
3H 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
3I
( )
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
This system frees or locks the rear differential according to the position of the rear diff. lock SW. The differential will lock onlywhen the rear diff. lock detection SW is on and the vehicle speed is at 8 km/h (5 mph) or less.When the rear diff. lock SW is switched from OFF position to ON position, current flows to TERMINAL 4 of the rear diff. lockECU. If the limit SW on the lock side inside the rear diff. lock motor is on at this time, until the limit SW is turned off, currentflows from the 4WD fuse to TERMINAL 5 of the rear diff. lock ECU to TERMINAL 3 to TERMINAL 3 of the rear diff. lockmotor to TERMINAL 2 to TERMINAL 2 of the rear diff. lock ECU to TERMINAL 7 to GROUND. This drives the rear diff. lockmotor and locks the rear differential. When the rear differential locks, the rear diff. lock detection SW turns on, lighting up therear diff. lock indicator light in the combination meter.When the rear diff. lock SW is switched from ON position to OFF position, the current to TERMINAL 4 of the rear diff. lockECU is cut off. If the limit SW on the free side inside the rear diff. lock motor is on, until the limit SW is turned off, current flowsfrom the 4WD fuse to TERMINAL 5 of the rear diff. lock ECU to TERMINAL 2 to TERMINAL 2 of the rear diff. lock motor toTERMINAL 3 to TERMINAL 3 of the rear diff. lock ECU to TERMINAL 7 to GROUND. This drives the rear diff. lock motor andfrees the rear differential. When the rear differential is free, the rear diff. lock detection SW and the rear diff. lock indicatorlight in the combination meter are turned off.The rear diff. lock indicator light flashes when:∗ The rear diff. lock SW is switched to ON position during differential lock prohibition conditions (Vehicle speed above 8 km/h
(5 mph) ).∗ The rear diff. lock detection SW is turned off during operation of the rear diff. lock motor.
R15 REAR DIFF. LOCK SW5-2 : Closed with the diff. lock SW at ON position
R16 REAR DIFF. LOCK ECU(Disconnected wiring connector from ECU)
7-GROUND : Always continuity10-GROUND : Pulse generation with vehicle moving
5-GROUND : 9- 14 volts with the ignition SW on1-GROUND : About 0 volts with the rear diff. lock indicator light on
: 9- 14 volts with the rear diff. lock indicator light off
R14 REAR DIFF. LOCK MOTOR2-3 : 0.3- 100 Ω
: PARTS LOCATION
Code See Page Code See Page Code See Page
A2230 (5VZ-FE) E5 A 35
R1436 (Double Cab)
A2232 (3RZ-FE) E6 B 35
R1437 (Except Double Cab)
C10 A 34 F6 35 R15 35
C13 D 34 J13 35 R16 35
D330 (5VZ-FE)
R1336 (Double Cab)
V1031 (5VZ-FE)
D332 (3RZ-FE)
R1337 (Except Double Cab)
V1033 (3RZ-FE)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1F23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1J23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3B
3D 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
( )
3G
3H 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
3I
( )
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
161
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IK2 44 Engine Wire and Cowl Wire (Above the Glove Box)
BN146 (Double Cab)
BN148 (Except Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)
BN646 (Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)
BN648 (Except Double Cab)
BO146 (Double Cab)
Frame Wire and Diff Lock Wire (Rear Side Member LH)BO148 (Except Double Cab)
Frame Wire and Diff. Lock Wire (Rear Side Member LH)
: GROUND POINTS
Code See Page Ground Points Location
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I944 Cowl Wire
B448 (Except Double Cab) Frame Wire
I1244 Cowl Wire
B548 (Except Double Cab) Frame Wire
B4 46 (Double Cab) Frame Wire
2001 TOYOTA TACOMA (EWD440U)
162
SHIFT LOCK
15AACC
7. 5AECU- IG
3G6
3A20
3G9
3A16
1G12 1H4
3
4
IE
I12
L-R
W-B
L-O
L-O
Y-R
W-B
W-B
W-B
W- B
1 3
6 7
KE
Y I
NTE
RLO
CK
SO
LEN
OID
[UN
LOC
K W
AR
NIN
G S
W]
U 1
SHIFT LOCKCONTROL RELAY
S 4
EKLS+
ACC IG
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IG
W-B
10ASTOP
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1F
3F
7
3F
10
8
STP
G- W G- W
G-Y
3G17
3G21
2
1
2
STOP LIGHTSW
S 5
G-W
G-Y
I 9
W-B
2001 TOYOTA TACOMA (EWD440U)
163
S4 SHIFT LOCK CONTROL RELAY1-GROUND : Approx. 12 volts with the ignition SW at ACC or ON position3-GROUND : Approx. 12 volts with the ignition SW at ON position7-GROUND : Always continuity8-GROUND : Approx. 12 volts with the brake pedal depressed
: PARTS LOCATION
Code See Page Code See Page Code See Page
S4 35 S5 35 U1 35
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1F
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1H
( )
3A24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3F24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3G 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I12 44 Cowl Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
164
DOOR LOCK CONTROL
14 3E
R-Y
LOC
K
UN
LOC
K
UN
LOC
K
LOC
K
13
1 6 7 4
3 2
4 7
5 8 4
8 3
B-LGR
R-Y
B-L
L-B
GR
W-B
W-B
W-B
W-B
L-W
VGR
G-B L
W- B
W- B
W- BB 2 B 2
B 3
M
D21
IH29 IH23IH212 IL27 IL26
IH211
DO
OR
KE
Y L
OC
K A
ND
UN
LOC
K S
W L
H
W- B
W- B
W- B
W- B
LOC
K
UN
LOC
K
LOC
K
UN
LOC
K
3B
B-L
3E16 3B12
1L2
3E15
BODY ECU
1L6 1L7 1L22
3B11
1L21
3E17 3E18
3E19
R-Y
IH28
V
IL21 IL23
GR
1H6
I 5
DO
OR
LO
CK
MO
TO
R A
ND
DO
OR
UN
LOC
K D
ETE
CTI
ON
SW
FR
ON
T LH
D21
IH210
2
30APOWER
7. 5AECU- IG
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1
3 10
15
L-B
GR
B-L
R-Y
B-L
R-Y
1L5
V
IH21
R- Y
B- L
L
G-B
L
G-B
L
L- W
B2 B5 (*2)A2 A7 (*1)
A3 (*1)
B1 (*2)
DO
OR
KE
Y L
OC
K A
ND
UN
LOC
K S
W R
H
D22
DO
OR
LO
CK
CO
NTR
OL
SW
RH
D20
2
1
2B
P 7
, A
DO
OR
LO
CK
CO
NTR
OL
SW
LH
[PO
WE
R W
IND
OW
MA
STE
R S
W]
L-Y
1E2
4
15ADOME
L
(*1)
2001 TOYOTA TACOMA (EWD440U)
165
IG
1 6
5 2
W-B
L-W
W-B
L-R L
1
M
IL29
IH2
2
IE
IL2
2
DO
OR
CO
UR
TE
SY
SW
RE
AR
RH
D27
W- B
W- B
W- B
G
Y-G
7
3B
3B
9
8
3BW- B
W-BI 9
BODY ECU
1J8
I18
DO
OR
LO
CK
MO
TOR
AN
D D
OO
RU
NLO
CK
DE
TEC
TIO
N S
W F
RO
NT
RH
D22
1
2
L-W
L
MM
LL-
W
2
1
BQ12 BR12
DO
OR
LO
CK
MO
TOR
RE
AR
LH
D28
DO
OR
LO
CK
MO
TOR
RE
AR
RH
D29
BQ11 BR11
1H7
3B20
3B21 3B22
IL212
I 7
814
1L1
IL211
LLL
L-R
L-R
L-W
( *1)
L-W
( *1)
L-W
L-W
W-B
L-W
L-W
L-W
L-W
L
L- W
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
W- B
W- B
B2 (M/T)A2 (A/T)
A1 (A/T)
B1 (M/T)
3F
21 3F
16
I 9
W-B
W-B
8 1L
BU
1,
A
UN
LOC
K W
AR
NIN
G S
W
1
DO
OR
CO
UR
TES
Y S
WF
RO
NT
LH
D15
G-W
1
DO
OR
CO
UR
TES
Y S
WF
RO
NT
RH
D161L11 1L4
10 1L
1
DO
OR
CO
UR
TE
SY
SW
RE
AR
LH
D26
Y-G
Y-G
LG-R
LG-R
( *1)
( *1)
( *1)
W- B
* 2 : EXCEPT DOUBLE CAB* 3 : EXCEPT 5VZ- FE
W-B
L
* 1 : DOUBLE CAB
I 3
L-W
I 1 : 5VZ- FEI 2 : *3
(*1)
2001 TOYOTA TACOMA (EWD440U)
166
DOOR LOCK CONTROL
Current always flows to TERMINAL 3 of the body ECU through the POWER fuse.
1. MANUAL LOCK OPERATIONTo push the door lock control SW or door key lock and unlock SW to LOCK position, a lock signal is input to the body ECUand causes the ECU to function. Current flows from TERMINAL 3 of the ECU to TERMINAL 14 to TERMINALS 3 (Front LH),2 (Front RH, rear) of the door lock motors to TERMINALS 7 (Front LH), 6 (Front RH), 1 (Rear) to TERMINAL 15 of the ECUto TERMINAL 8 to GROUND and the door lock motor causes the door to lock.
2. MANUAL UNLOCK OPERATIONTo push the door lock control SW or door key lock and unlock SW to UNLOCK position, an unlock signal is input to the bodyECU and causes the ECU to function. Current flows from TERMINAL 3 of the ECU to TERMINAL 15 to TERMINALS 7 (FrontLH), 6 (Front RH), 1 (Rear) of the door lock motors to TERMINALS 3 (Front LH), 2 (Front RH, rear) to TERMINAL 14 of theECU to TERMINAL 8 to GROUND and the door lock motor causes the door to unlock.
3. IGNITION KEY REMINDER OPERATION∗ Operating door lock knob (in door lock motor operation)
With ignition key in cylinder (Unlock warning SW on), when any door is opened and locked using door lock knob (Doorlock motor), all doors are locked once but each door is unlocked soon by the function of the body ECU. As a result,current flows from TERMINAL 3 of the ECU to TERMINAL 15 to TERMINALS 7 (Front LH), 6 (Front RH), 1 (Rear) of thedoor lock motors to TERMINALS 3 (LH), 2 (Front RH, rear) to TERMINAL 14 of the ECU to TERMINAL 8 to GROUNDand causes all the doors to unlock.
∗ Operating door lock control SW or door key lock and unlock SWWith ignition key in cylinder (Unlock warning SW on), when any door is opened and locked using the door lock controlSW or door key lock and unlock SW, all doors are locked once but each door is unlocked by the function of the SWcontained in motor, which inputs the signal to the body ECU. According to this input signal, current flows fromTERMINAL 3 of the ECU to TERMINAL 15 to TERMINALS 7 (Front LH), 6 (Front RH), 1 (Rear) of the door lock motorsto TERMINALS 3 (Front LH), 2 (Front RH, rear) to TERMINAL 14 of the ECU to TERMINAL 8 to GROUND and causesall the doors to unlock.
BODY ECU8-GROUND : Always continuity.
3, 4-GROUND : Always approx. 12 volts15-GROUND : Approx. 12 volts for 0.2 seconds with following operations.
∗ Door lock control SW unlocked.∗ Door lock control SW locked with ignition key in cylinder and LH door open.(Ignition key reminder function)∗ Door lock knob locked with ignition key in cylinder and LH door open. (Ignition key reminder function)∗ Unlocking the LH, RH door cylinder with key.
14-GROUND : Approx. 12 volts for 0.2 seconds with following operations.∗ Door lock control SW locked.∗ Locking the LH, RH door cylinder with key.
D15, D16, D26, D27 DOOR COURTESY SW FRONT REAR LH, RH1-GROUND : Closed with door open.
D21, D22 DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SW AND DOOR KEY LOCK AND UNLOCK SW LH, RH4-8 (LH), 1-5 (RH) : Closed with UNLOCK position.
U1 (A), (B) UNLOCK WARNING SW(A) 1-(A) 2, (B) 1-(B) 2 : Closed with key in cylinder.
: PARTS LOCATION
Code See Page Code See Page Code See Page
D15 34D22
36 (Double Cab)P7
A 36 (Double Cab)
D16 34D22
37 (Except Double Cab)P7
B 37 (Except Double Cab)
D2036 (Double Cab) D26 36 (Double Cab)
U1A 35
D2037 (Except Double Cab) D27 36 (Double Cab)
U1B 35
D2136 (Double Cab) D28 36 (Double Cab)
D2137 (Except Double Cab) D29 36 (Double Cab)
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
167
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1H23
1J23
Cowl Wire and J/B No.1 (Lower Finish Panel)
1L 22
( )
3B
3E 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
( )
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IH2 44 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IL2 44 Front Door RH Wire and Cowl Wire (Right Kick Panel)
BQ1 46 (Double Cab) Rear Door No.2 Wire and Cowl Wire (Under the Left Center Pillar)
BR1 46 (Double Cab) Rear Door No.1 Wire and Cowl Wire (Under the Right Center Pillar)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I1 I18 44 Cowl Wire
I2B2
46 (Double Cab)Front Door LH Wire
I344 Cowl Wire
B248 (Except Double Cab)
Front Door LH Wire
I544 Cowl Wire
B346 (Double Cab)
Front Door RH WireI7
B348 (Except Double Cab)
Front Door RH Wire
I9
2001 TOYOTA TACOMA (EWD440U)
168
POWER WINDOW
9 3B
8 3B
11
1 2
W-B
W-B
W-B
L-Y L
POWER WINDOW MOTORFRONT LH
P 8
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IH22
IE
I 9
W-B
10
L- R
G-WG
2
1E2
4
2
L-Y
1
M
PW
R R
ELA
Y
2 3
1 5
2
30APOWER
1J8 1C1
IG
DO
OR
CO
UR
TE
SY
SW
FRO
NT
LH
D15
DO
OR
CO
UR
TE
SY
SW
FRO
NT
RH
D16
1L11 1L4
3B14 3B15
IH24
A3 (*1)
B1 (*2)A1B3
A5B4
B9 (*2)A10 (*1)
8 2
1
3
7. 5AECU- IG
15ADOME
BODY ECU
L-R
L-R
L-R
L- R
W- B
W-B
W-B
3B16
AU
TOD
OW
N
IC
P 7 ,
POWER WINDOW MASTER SW
A B
2001 TOYOTA TACOMA (EWD440U)
169
DO
WN
UP
5 2
PASSENGER’ S
3 1
2 1
R-B
R-G
R-B
R-G
R-B
R-G
L-O G
POWER WINDOW MOTORFRONT RH
P 9
UP
DO
WN
IL210 IL25
IH25 IH27
M
WIN
DO
WLO
CK
SW
LOC
K
NO
RM
AL
A14B8
A6B10 (*2)
DO
WN
UP
2 4
1 5
1 2
R-L
L-B
R-L
L-B
Y LG
L-O G
POWER WINDOW MOTORREAR LH
P27
BQ14 BQ13
IH35 IH34
M
A9 A12
DO
WN
UP
2 4
1 5
1 2
Y LG
Y LG
Y LG
L-O G
POWER WINDOW MOTORREAR RH
P28
BR14 BR13
IH36 IH37
A8 A13 (*1)
REAR LH
UP
DO
WN
REAR RH
UP
DO
WN
BR15BQ15IL24
I18
PO
WE
R W
IND
OW
CO
NTR
OL
SW
FR
ON
T R
H
P 6
PO
WE
R W
IND
OW
CO
NTR
OL
SW
RE
AR
LH
P25
PO
WE
R W
IND
OW
CO
NTR
OL
SW
RE
AR
RH
P26
( *1)
( *1)
( *1)
( *1)
R-L
( *1)
( *1)
L-B
L-R
( *1)
L-R
( *1)
( *1)
L-R
L-R
L-R
( *1)
( *1)
( *1)
( *1)
( *1)
L-R
( *1)
( *1)
( *1)
( *1)
L- R
( *1)
( *1)
( *1)
( *1)
R-L
R-L
3 34
* 1 : DOUBLE CAB* 2 : EXCEPT DOUBLE CAB
I 9L- R
L- R
L- R
(*1)
(*1)
P 7 ,
POWER WINDOW MASTER SW
A B
M
2001 TOYOTA TACOMA (EWD440U)
170
POWER WINDOW
With the ignition SW turned on, current flows through the ECU-IG fuse to TERMINAL 10 of the body ECU to TERMINAL 2 toTERMINAL 1 of the PWR relay to TERMINAL 2 to GROUND, activating the PWR relay, and the current flowing fromTERMINAL 5 of the PWR relay flows to TERMINAL 3 to TERMINAL (A) 10 (Double cab), (B) 9 (Except double cab) of thepower window master SW and TERMINAL 4 (Front RH), 3 (Rear) of the power window control SW.
1. MANUAL OPERATION (DRIVER’S WINDOW)With the ignition SW turned on and with the power window master SW (Manual SW) in UP position, the current flowing toTERMINAL (A) 10 (Double cab), (B) 9 (Except double cab) of the power window master SW flows to TERMINAL (A) 1(Double cab), (B) 3 (Except double cab) to TERMINAL 1 of the power window motor LH to TERMINAL 2 to TERMINAL (A) 5(Double cab), (B) 4 (Except double cab) of the master SW to TERMINAL (A) 3 (Double cab), (B) 1 (Except double cab) toGROUND and causes the power window motor to rotate in the up direction. The window ascends only while the SW is beingpushed.In down operation, the current flowing from TERMINAL (A) 10 (Double cab), (B) 9 (Except double cab) of the power windowmaster SW to TERMINAL (A) 5 (Double cab), (B) 4 (Except double cab) flows to TERMINAL 2 of the motor LH to TERMINAL1 to TERMINAL (A) 1 (Double cab), (B) 3 (Except double cab) of the master SW to TERMINAL (A) 3 (Double cab), (B) 1(Except double cab) to GROUND, flowing in the opposite direction to manual up operation, causing the motor to rotate inreverse and lowering the window.
2. AUTO DOWN OPERATION (DRIVER’S WINDOW)With the ignition SW on and with the auto SW of the power window master SW in DOWN position, the current flowing toTERMINAL (A) 10 (Double cab), (B) 9 (Except double cab) of the master SW flows to TERMINAL (A) 5 (Double cab), (B) 4(Except double cab) of the master SW to TERMINAL 2 of the power window motor LH to TERMINAL 1 to TERMINAL (A) 1(Double cab), (B) 3 (Except double cab) of the master SW to TERMINAL (A) 3 (Double cab), (B) 1 (Except double cab) toGROUND, causing the motor to rotate towards the down side.Then the solenoid in the master SW is activated and it locks the auto SW being pushed, causing the motor to continue torotate in auto down operation.When the window has completely descended, the current flowing between TERMINAL (A) 1 (Double cab), (B) 3 (Exceptdouble cab) of the master SW and TERMINAL (A) 3 (Double cab), (B) 1 (Except double cab) increases. As a result, thesolenoid stops operating, the auto SW turns off and the flowing from TERMINAL (A) 10 (Double cab), (B) 9 (Except doublecab) of the master SW to TERMINAL (A) 5 (Double cab), (B) 4 (Except double cab) is cut off, stopping the motor so that autostop occurs.
3. STOPPING OF AUTO DOWN AT DRIVER’S WINDOWWhen the manual SW (Driver’s) is pushed to the up side during auto down operation, a ground circuit opens in the masterSW and current does not flow from TERMINAL (A) 1 (Double cab), (B) 3 (Except double cab) of the master SW toTERMINAL (A) 3 (Double cab), (B) 1 (Except double cab), so the motor stops, causing auto down operation to stop. If themanual SW is pushed continuously, the motor rotates in the up direction in manual up operation.
4. MANUAL OPERATION BY POWER WINDOW CONTROL SW (FRONT RH WINDOW)With the power window control SW front RH is pushed to the up side, the current flowing from TERMINAL 4 of the powerwindow control SW front RH flows to TERMINAL 3 to TERMINAL 2 of the power window motor front RH to TERMINAL 1 toTERMINAL 1 of the power window control SW front RH to TERMINAL 2 to TERMINAL (A) 6 (Double cab), (B) 10 (Exceptdouble cab) of the master SW to TERMINAL (A) 3 (Double cab), (B) 1 (Except double cab) to GROUND. This causes thepower window motor front RH to rotate in the up direction. Up operation is continuous only while the power window controlSW RH is pushed to the up side. When the window descends, the current flowing to the motor flows in the opposite direction,from TERMINAL 1 to TERMINAL 2, and the motor rotates in revers.When the window lock SW is pushed to the lock side, the ground circuit to the front RH window becomes open. As a result,even if Open/Close operation of the front RH window is tried, the current from TERMINAL (A) 3 (Double cab), (B) 1 (Exceptdouble cab) of the power window master SW is not grounded and the motor does not rotate, so the front RH window can notbe operated and window lock occurs.
5. MANUAL OPERATION (REAR LH, RH WINDOW) [DOUBLE CAB]With the power window control SW rear LH, RH pulled to the up side, the current flowing from TERMINAL 3 of the powerwindow control SW flows to TERMINAL 1 to TERMINAL 1 of the power window motor to TERMINAL 2 to TERMINAL 5 of thepower window control SW to TERMINAL 4 to TERMINAL (A) 12 (LH) or (A) 13 (RH) of the master SW to TERMINAL (A) 3(Double cab), (B) 1 (Except double cab) to GROUND and causes the power window motor rear LH, RH to rotate in the updirection. The up operation continues only while the power window control SW is pulled to the up side. When the windowdescends, the current flowing to the motor flows in the opposite direction, from TERMINAL 1 to TERMINAL 2, and the motorrotates in reverse. When the window lock SW is pushed to the lock side, the ground circuit to the rear LH, RH windowbecomes open.As a result, even if Open/Close operation of the rear LH, RH window is tried, the current from TERMINAL (A) 3 (Double cab),(B) 1 (Except double cab) of the power window master SW is not grounded and the motor does not rotate, so the rear LH,RH window can not be operated and window lock occurs.
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
171
6. KEY OFF POWER WINDOW OPERATIONWith the ignition SW turned from on to off, the body ECU operates for about 45 seconds and current flows from TERMINAL 1of the PWR relay to TERMINAL 2 to GROUND. For this period, current also flows TERMINAL 5 to TERMINAL 3. This currentflows to TERMINAL (A) 10 (Double cab), (B) 9 (Except double cab) of the power window master SW and to TERMINAL 4(Front RH), 3 (Rear) of the power window control SW. As a result, for about 45 seconds after the ignition SW is turned off, itis possible to raise and lower the power window by the functioning of the body ECU. Also, by opening the door (Doorcourtesy SW on) within about 45 seconds after turning the ignition SW to off, a signal is input to the dody ECU. As a result,the body ECU turns off, and up and down movement of the window stops.
D15, D16 DOOR COURTESY SW LH, RH1-GROUND : Continuity with door open
BODY ECU10-GROUND : Approx. 12 volts with ignition SW at ON position
3, 4-GROUND : Always approx. 12 volts
P7 POWER WINDOW MASTER SW(A) 3, (B) 1-GROUND : Always continuity(A) 10, (B) 9-GROUND : Approx. 12 volts with ignition SW on and stays at 12 volts for 45 seconds after the ignition SW
is turned off, but if a door is opened in this 45 seconds period, voltage will drop to 0 volts(A) 1, (B) 3-GROUND : Approx. 12 volts with ignition SW at ON position and master SW at UP position(A) 5, (B) 4-GROUND : Approx. 12 volts with ignition SW at ON position and master SW at DOWN or AUTO DOWN position
WINDOW LOCK SWOpen with window lock SW at LOCK position
Code See Page Junction Block and Wire Harness (Connector Location)
1C 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1J 23Cowl Wire and J/B No 1 (Lower Finish Panel)
1L 22Cowl Wire and J/B No.1 (Lower Finish Panel)
3B 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IH244 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IH344 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IL2 44 Front Door RH Wire and Cowl Wire (Right Kick Panel)
BQ1 46 (Double Cab) Rear Door No.2 Wire and Cowl Wire (Under the Left Center Pillar)
BR1 46 (Double Cab) Rear Door No.1 Wire and Cowl Wire (Under the Right Center Pillar)
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
172
POWER WINDOW
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I18 44 Cowl Wire
2001 TOYOTA TACOMA (EWD440U)
173
MEMO
2001 TOYOTA TACOMA (EWD440U)
174
REMOTE CONTROL MIRROR (w/ POWER WINDOW)
LH RH LH RH
REMOTE CONTROLMIRROR SW
LEF
T
RIG
HT
UP
DO
WN
2 2
63
1
UP
/LE
FT
DO
WN
/R
IGH
T
15AACC
L-O
L-O
R10
R 8 R 9
8
SE
LEC
TO
PE
RA
TIO
N
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IL13 IL17 IL15
IH22
IE
3G6
3G4
L-O
G- B
REMOTE CONTROL MIRROR LH REMOTE CONTROL MIRROR RH IG
P-G GR R
G-R
G-B R
W-B
W-B
R
LG-B
LG-R
G-R
G-B
R
W-B
R
P-GGR
I20
I 9
W-B
W-B
R
3B9
3B8
742
3
5
3 1
1G12
M M M M
* 1 : DOUBLE CAB* 2 : EXCEPT DOUBLE CAB
IH38IH13
(*1)(*2)
IH17IH311
IH15IH313
IH12IH39 (*1)
(*2)
2001 TOYOTA TACOMA (EWD440U)
175
R10 REMOTE CONTROL MIRROR SW8-GROUND : Approx. 12 volts with ignition SW at ACC or ON position
6-7 : Continuity with operation SW at UP or LEFT position8-6 : Continuity with operation SW at DOWN or RIGHT position
: PARTS LOCATION
Code See Page Code See Page Code See Page
R836 (Double Cab)
R936 (Double Cab)
R1036 (Double Cab)
R837 (Except Double Cab)
R937 (Except Double Cab)
R1037 (Except Double Cab)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3B 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3G 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IH1
IH2 44 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IH3
( )
IL1 44 Front Door RH Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I20 44 Front Door LH Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
176
REMOTE CONTROL MIRROR (w/o POWER WINDOW)
LH RH LH RH
REMOTE CONTROLMIRROR SW
LEFT
RIG
HT
UP
DO
WN
2 2
63
1
UP
/LE
FT
DO
WN
/R
IGH
T
15AACC
L-O
R10
R 8 R 9
8
SE
LEC
TO
PE
RA
TIO
N
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IL13 IL17 IL15
IE
3G6
3G4L-
O
LG- B
REMOTE CONTROL MIRROR LH REMOTE CONTROL MIRROR RH IG
P-G P R
G-R
G-B R W
-B
R
LG-B
LG-R
R
W-BP-GGR
I20
I 9
W-B
W-B
R
3B9
3B8
742
3
5
3 1
1G12
M M M M
IH13IH15IH17
RGR
P-G
2001 TOYOTA TACOMA (EWD440U)
177
R10 REMOTE CONTROL MIRROR SW8-GROUND : Approx. 12 volts with ignition SW at ACC or ON position
6-7 : Continuity with operation SW at UP or LEFT position8-6 : Continuity with operation SW at DOWN or RIGHT position
: PARTS LOCATION
Code See Page Code See Page Code See Page
R836 (Double Cab)
R936 (Double Cab)
R1036 (Double Cab)
R837 (Except Double Cab)
R937 (Except Double Cab)
R1037 (Except Double Cab)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3B 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3G 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IH1 44 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IL1 44 Front Door RH Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I20 44 Front Door LH Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
178
WIPER AND WASHER (w/ INT TIME SW MECHANISM)
3 5 2 1
+2 +1 B +S
OF
F
LO HI
WA
SH
ER
20AWIPER
WIPER MOTOR
11
2
16
7
8
17 L
R- W
L- B
L- W
W- B
L- O L
WIPER AND WASHER SW [COMB. SW]C15
W 1
M
R-W L-
B L
L-W
W-B
W 3
WASHER MOTOR
L
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IE
L
L- O
3F18
3F16
I 9
W-B
W-B
W- BW- B
4
IG
W-B
L
21
INT
M
1G13
3D7
3D9
3D
8
3D
6
L
L
I16
WIPER RELAY
2001 TOYOTA TACOMA (EWD440U)
179
With the ignition SW turned on, current flows to TERMINAL 17 of the wiper and washer SW, TERMINAL 2 of the washermotor and TERMINAL 2 of the wiper motor through the WIPER fuse.
1. LOW SPEED POSITIONWith wiper SW turned to LOW position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 toTERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.
2. HIGH SPEED POSITIONWith wiper SW turned to HIGH position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 8 toTERMINAL 3 of the wiper motor to TERMINAL 4 to GROUND and causes the motor to run at high speed.
3. INT POSITIONWith wiper SW turned to INT position, the relay operates and the current which is connected by relay function flows fromTERMINAL 17 of the wiper and washer SW to TERMINAL 2 to GROUND. This flowing the intermittent circuit and currentflows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL 5 of the wiper motor to TERMINAL 4 toGROUND and the wiper functions.The intermittent operation is controlled by charging and discharging of the condenser installed in the relay and theintermittent time is controlled by a time control SW to change the charging time of the condenser.
4. WASHER CONTINUOUS OPERATIONWith the washer SW turned to on, current flows from TERMINAL 2 of the washer motor to TERMINAL 1 to TERMINAL 11 ofthe wiper and washer SW to TERMINAL 2 to GROUND and causes to the washer motor to run, and the window washer isjetted.This causes current to flow to washer continuous operation circuit in TERMINAL 17 of the wiper and washer SW toTERMINAL 7 to TERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and the wiper functions.
C15 WIPER AND WASHER SW [COMB. SW]2-GROUND : Always continuity
17-GROUND : Approx. 12 volts with ignition SW at ON position7-GROUND : Approx. 12 volts with wiper and washer SW at LOW position
Approx. 12 volts every 3 to 12 seconds intermittently with wiper SW at INT position16-GROUND : Approx. 12 volts with ignition SW on unless wiper motor at STOP position
8-GROUND : Approx. 12 volts with ignition SW on and wiper and washer SW at HIGH position11-2 : Continuity with washer SW on
W3 WIPER MOTOR1-2 : Closed unless wiper motor at STOP position
Code See Page Junction Block and Wire Harness (Connector Location)
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3D24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3F24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I16 44 Cowl Wire
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
180
WIPER AND WASHER (w/o INT TIME SW MECHANISM)
3 5 2 1
+2 +1 B +S
OF
F
LO HI
WA
SH
ER
20AWIPER
WIPER MOTOR
11
2
16
7
8
17 L
R- W
L- B
L- W
W- B
L- O L
WIPER AND WASHER SW [COMB. SW]C15
W 1
M
R-W L-
B L
L-W
W-B
W 3
WASHER MOTOR
L
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IE
L
L- O
3F18
3F16
I 9
W-B
W-B
W- BW- B
4
IG
W-B
L
21
MIS
T
M
1G13
3D7
3D9
3D
8
3D
6
L
L
I16
2001 TOYOTA TACOMA (EWD440U)
181
With the ignition SW turned on, current flows to TERMINAL 17 of the wiper and washer SW, TERMINAL 2 of the washermotor and TERMINAL 2 of the wiper motor through the WIPER fuse.
1. LOW SPEED POSITIONWith wiper SW turned to LOW position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 toTERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.
2. HIGH SPEED POSITIONWith wiper SW turned to HIGH position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 8 toTERMINAL 3 of the wiper motor to TERMINAL 4 to GROUND and causes the motor to run at high speed.
3. MIST POSITIONWith the wiper SW turned to MIST position, current flows from TERMINAL 17 of the wiper and washer SW to TERMINAL 7 toTERMINAL 5 of the wiper motor to TERMINAL 4 to GROUND and causes the wiper motor to run at low speed.
4. WASHER CONTINUOUS OPERATIONWith the washer SW turned to on, current flows from TERMINAL 2 of the washer motor to TERMINAL 1 to TERMINAL 11 ofthe wiper and washer SW to TERMINAL 2 to GROUND and causes to the washer motor to run, and the window washer isjetted.
C15 WIPER AND WASHER SW [COMB. SW]2-GROUND : Always continuity
17-GROUND : Approx. 12 volts with ignition SW at ON position7-GROUND : Approx. 12 volts with wiper and washer SW at LOW or MIST position
16-GROUND : Approx. 12 volts with ignition SW on unless wiper motor at STOP position8-GROUND : Approx. 12 volts with ignition SW on and wiper and washer SW at HIGH position
11-2 : Continuity with washer SW on
W3 WIPER MOTOR1-2 : Closed unless wiper motor at STOP position
Code See Page Junction Block and Wire Harness (Connector Location)
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3D24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3F24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I16 44 Cowl Wire
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
182
KEY REMINDER AND SEAT BELT WARNING
2
1
2
BUCKLESW LH
7. 5AECU- IG
15ADOME
B
L-Y
B 6
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
W-B
IE
1E2
D1
C3
3D19
B-R
3A18
3A16
1
3F16
3F21
W-B
W-B
LG-R
W- B
10 4
2
B2 (M/T)A2 (A/T)
A1 (A/T)
B1 (M/T)
IG
I 9W- B
W-B
W-B
1
* 1 : W/ TACHOMETER* 2 : W/O TACHOMETER
A5 (*1)
3D3D
1620 (*1)
(*2)
U 1 ,
UNLOCKWARNING SW
A B
(*2)
SE
AT
BE
LTW
AR
NIN
G L
IGH
T[C
OM
B.
ME
TE
R]D
C12
C,
C13
10AGAUGE
1F5
B-R
1L19
BODY ECU
1J8 1L3
3F1
3F2
LG-B
LG- B
LG- B
1L11
G
W- B
1L8
8
DOOR COURTESYSW FRONT LH
D15
2001 TOYOTA TACOMA (EWD440U)
183
Current always flows to TERMINAL 4 of the body ECU through the DOME fuse.
1. SEAT BELT WARNING SYSTEMWhen the ignition SW is turned on, current flows from the ECU-IG fuse to TERMINAL 10 of the body ECU. At the same time,current flows to the ECU from the GAUGE fuse through the seat belt warning light. This current activates the body ECU and,for approx. 4-8 seconds, the current flowing through the warning light flows from ECU to TERMINAL 8 to GROUND, causingthe warning light to light up. At the same time as the warning light lights up, a buckle SW LH on signal is input to the bodyECU, the current flowing from TERMINAL 4 of the body ECU flows to TERMINAL 8 to GROUND and the seat belt warningbuzzer sounds for approx. 4-8 seconds. However, if the seat belt is put on (Buckle SW LH off) during this period (While thebuzzer is sounding), a signal input to the body ECU stops and the current flowing from TERMINAL 4 of the body ECU toTERMINAL 8 to GROUND is cut, causing the buzzer to stop.
2. KEY REMINDER SYSTEMWith the ignition key inserted in the key cylinder (Unlock warning SW on), the ignition SW still off and front LH door open(Door courtesy SW on), a signal is input to the body ECU, the body ECU operates and current flows from TERMINAL 10 ofthe ECU to TERMINAL 8 to GROUND and the key reminder buzzer sounds.
B6 BUCKLE SW LH1-2 : Open with driver’s seat belt in use
D15 DOOR COURTESY SW FRONT LH1-GROUND : Closed with LH door open
BODY ECU10-GROUND : Approx. 12 volts with ignition SW on
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F23
1J23
Cowl Wire and J/B No.1 (Lower Finish Panel)
1L 22
( )
3A
3D 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3F
( )
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire
SYSTEM OUTLINE
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
184
POWER OUTLET
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
15AACC
J11
W-B
W-B
IF110
R-B
R-B
G-B
G-B
W
L-W
R-B
3 2
5 1
2 2
2 2
W-B
W-B
PWR OUTLETRELAY
BATTERY
R- B
EA
W- B
BD
AE
IG
2
JUNCTIONCONNECTOR
2
A
2
POWEROUTLET
A
POWEROUTLET
IF118
A
11
P13 P14
I12
IE
120AALT
JUNCTIONCONNECTOR
BJ 9 , J10A
2
1
15APWROUTLET
2
1
2
1G6L-
W
W- B
2001 TOYOTA TACOMA (EWD440U)
185
P13, P14 POWER OUTLET2-GROUND : Approx. 12 volts with the ignition SW at ACC or ON position1-GROUND : Always continuity
: PARTS LOCATION
Code See Page Code See Page Code See Page
J9 A31 (5VZ-FE) J10 B 33 (3RZ-FE, 2RZ-FE) P14 35
J9 A33 (3RZ-FE, 2RZ-FE) J11 35
J10 B 31 (5VZ-FE) P13 35
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
: GROUND POINTS
Code See Page Ground Points Location
EA40 (5VZ-FE)
Front Left FenderEA42 (3RZ-FE, 2RZ-FE)
Front Left Fender
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I12 44 Cowl Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
186
CIGARETTE LIGHTER AND CLOCK
15ADOME
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
2
15AACC
1G12
10ATAIL
2
3C15
3F16
3C6
1F4
3G83G7
3C163C7
1E6
3G6
3F19
IE IG
G- R
W-B
W-B
W-B
L-O
L-O
L-Y
G-R
G-R
L-Y
L-Y
L-O
2 3
142
1
CIGARETTELIGHTER CLOCK
C 4C 7
2 2
1 1
I 9
W-B
W- BI12
1H3
1E2
W-B
2001 TOYOTA TACOMA (EWD440U)
187
C4 CIGARETTE LIGHTER2-GROUND : Approx. 12 volts with ignition SW at ON and ACC position1-GROUND : Always continuity
C7 CLOCK1-GROUND : Always approx. 12 volts (Power for clock)4-GROUND : Approx. 12 volts with ignition SW at ON or ACC position (Power for indication)3-GROUND : Approx. 12 volts with light control SW at TAIL or HEAD position (Signal of indication)2-GROUND : Always continuity
: PARTS LOCATION
Code See Page Code See Page Code See Page
C4 34 C7 34
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F
1G 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1H
( )
3C24 Cowl Wire and J/B No 3 (Behind the Instrument Panel Left)
3F24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3G 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
Code See Page Junction Block and Wire Harness (Connector Location)
1C 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
BU1 50 Cowl Wire and Seat No.1 Wire (Under the Driver’s Seat)
: GROUND POINTS
Code See Page Ground Points Location
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I5 44 Cowl Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
190
RADIO AND PLAYER
15AACC
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1G10
15ADOME
2
A3
3H11
3H12
1H3
1E2
3C7
3C5
1 2 1 2
B2 B6 B1 B3
A4
A7
IH
A2
IH16IH312
IH14IH310
A6
SPEAKER(FRONT DOOR LH)
S 6
SPEAKER (REAR LH)S 8
SPEAKER (REAR RH)S 9
RADIO AND PLAYER
BR 1 , R 2A
TWEETER LHT 5
1
1 2
2
(*3)(*4)
B Y R W
( RE
GU
LAR
CA
B)
( RE
GU
LAR
CA
B)
( RE
GU
LAR
CA
B)
( RE
GU
LAR
CA
B)
BR
L-Y
L-Y
L-Y G
R
GR
GR
P( 6
SP
EA
KE
R)
V( 6
SP
EA
KE
R)
P V
P V
( 5V
Z-FE
)
( EX
CE
PT
5VZ-
FE)
( 5V
Z-FE
)
RR-RR+RL-RL+GND
+B ACC FL+ FL-
BS11 BS12 BT11 BT12
R
( RE
GU
LAR
CA
B)
W
( RE
GU
LAR
CA
B)
R
( RE
GU
LAR
CA
B)
W
( RE
GU
LAR
CA
B)
2
1
2001 TOYOTA TACOMA (EWD440U)
191
1 2
BR16BR22
BR18BR21
B1 B36 B
1 2
2 B
1 BQ28 BQ1
2 BQ26 BQ1
A1 A5
SPEAKER(FRONT DOOR RH)
S 7
SPEAKER (REAR LH)S 8
SPEAKER (REAR RH)S 9
RADIO AND PLAYER
BR 1 , R 2A
IL16 IL14
TWEETER RHT 6
1
1
2
2
(*1)(*2)
(*1)(*2)
B
( EX
TRA
CA
B)
B
( DO
UB
LE C
AB
)
Y
( DO
UB
LE C
AB
)
Y
( EX
TRA
CA
B)
R
( EX
TRA
CA
B)
R
( DO
UB
LE C
AB
)
W
( DO
UB
LE C
AB
)
R
( DO
UB
LE C
AB
)
W
( DO
UB
LE C
AB
)
W
( EX
TRA
CA
B)
R
( DO
UB
LE C
AB
)
W
( DO
UB
LE C
AB
)
L LG
L
L(6
SP
EA
KE
R)
LG( 6
SP
EA
KE
R)
LG
RL+ RL- RR+ RR-
FR+ FR-
* 1 : W/ POWER WINDOW* 2 : W/O POWER WINDOW* 3 : DOUBLE CAB* 4 : EXCEPT DOUBLE CAB
2001 TOYOTA TACOMA (EWD440U)
192
RADIO AND PLAYER
R1 (A) RADIO AND PLAYER(A) 3-GROUND : Approx. 12 volts with ignition SW at ON or ACC position(A) 4-GROUND : Always approx. 12 volts(A) 7-GROUND : Always continuity
: PARTS LOCATION
Code See Page Code See Page Code See Page
R1 A 35 S7 37 (Except Double Cab)T5
36 (Double Cab)
R2 B 35S8
36 (Double Cab)T5
37 (Except Double Cab)
S636 (Double Cab)
S837 (Except Double Cab)
T636 (Double Cab)
S637 (Except Double Cab)
S936 (Double Cab)
T637 (Except Double Cab)
S7 36 (Double Cab)S9
37 (Except Double Cab)
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1G23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1H23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3C 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3H 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IH144 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IH344 Front Door LH Wire and Cowl Wire (Left Kick Panel)
IL1 44 Front Door RH Wire and Cowl Wire (Right Kick Panel)
BQ146 (Double Cab) Rear Door No 2 Wire and Cowl Wire (Under the Left Center Pillar)
BQ246 (Double Cab) Rear Door No.2 Wire and Cowl Wire (Under the Left Center Pillar)
BR146 (Double Cab) Rear Door No 1 Wire and Cowl Wire (Under the Right Center Pillar)
BR246 (Double Cab) Rear Door No.1 Wire and Cowl Wire (Under the Right Center Pillar)
BS1 48 (Except Double Cab) Rear Speaker LH Wire and Cowl Wire (Under the Left Center Pillar)
BT1 48 (Except Double Cab) Rear Speaker RH Wire and Cowl Wire (Under the Right Center Pillar)
P4 PARKING BRAKE SW1-2 : Closed with parking brake lever pulled up
: PARTS LOCATION
Code See Page Code See Page Code See Page
B230 (5VZ-FE) F8 37 (Except Double Cab) P4 35
B232 (3RZ-FE, 2RZ-FE)
J9 A31 (5VZ-FE)
V1031 (5VZ-FE)
C10 A 34J9 A
33 (3RZ-FE, 2RZ-FE)V10
33 (3RZ-FE, 2RZ-FE)
C12 C 34J10 B
31 (5VZ-FE)W1
31 (5VZ-FE)
C13 D 34J10 B
33 (3RZ-FE, 2RZ-FE)W1
33 (3RZ-FE, 2RZ-FE)
D8 34O2
31 (5VZ-FE)W2
A 31 (5VZ-FE)
F8 36 (Double Cab)O2
33 (3RZ-FE, 2RZ-FE)W2
B 33 (3RZ-FE, 2RZ-FE)
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1D 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F23 Cowl Wire and J/B No 1 (Lower Finish Panel)
1M23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3A
3B
3C 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3D
( )
3F
3G 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IK2 44 Engine Wire and Cowl Wire (Above the Glove Box)
BN146 (Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)BN148 (Except Double Cab)
Frame Wire and Cowl Wire (Under the Driver’s Seat)
: GROUND POINTS
Code See Page Ground Points Location
EA40 (5VZ-FE)
Front Left FenderEA42 (3RZ-FE, 2RZ-FE)
Front Left Fender
EB 40 (5VZ-FE) Near the Throttle Body
EF 42 (3RZ-FE, 2RZ-FE) Ignition Coil Braket
ID 44 Left Kick Panel
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
205
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I9 44 Cowl Wire I12 44 Cowl Wire
2001 TOYOTA TACOMA (EWD440U)
206
AIR CONDITIONING
3F15
3F17
3F
16
I 7
1
2
I10
A14B13
A13 (*2)B25 (*1)
A/C
TH
ER
MIS
TO
RA
15
24 22 23 9 10 4 5 12 13 11
8 7 6 5 4 13 1
2
2 6 7 21 20 19 18 17 25
4 5 3 2 1
AIR MIX CONTROL SERVO MOTORA27
AIR VENT MODE CONTROL SERVO MOTORA28
G-O
LG-B
LG-B
L-B
L-Y
W R B GR Y
LG-B
B-R
Y-G
R-G
Y-B
P-B
R-L
G-W
G-B
W-B
W-B
B-R
B- R
W- B
B- R
ENGINE CONTROL MODULE
BE 5 , E 6A
ACT AC1
7. 5AECU- B
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
1B4
1
L-R
A/C CONTROL ASSEMBLYA25
M
M
I 7
AIR INLET CONTROLSERVO MOTOR
A26
7
IG+ FRS REC
M
DEF F/D FOOT B/L FACE -
+
A
B
B- R
B-R
B-R
CONTROLCIRCUIT
FRE
SH
RE
CIR
C
2001 TOYOTA TACOMA (EWD440U)
207
R
2
R
2
BLOWER RESISTORB 5
65
8
HEATERBLOWER SW
H 7
2
2
2
3
1
2
5
4HEATER RELAY
2
2
1
L-W
L-B
Y-R
B-W
L-B
L-Y
L-R Y
-R
W-B
10AA. C
10AGAUGE
BLOWER MOTOR
L- B
B 4
I19
2
R
4
L-W
B-W
B- W
2
EAIE
R
W-B
W-B
1
FROM POWER SOURCE SYSTEM (SEE PAGE 54)
IG
HI M2 M1 LO
1I16
W- B
E 3
1E5
50AHEATER
W-B
IF122
IF11
IF19
2
1
W-B
W- B
E A
BD
A B
C A
JUN
CTI
ON
CO
NN
EC
TO
R
BJ
9A
, J1
0
JUN
CT
ION
CO
NN
EC
TOR
BJ
9A
, J1
0
1F5
3I4
3I2
2
1
IK224
1
2
I 9
3I
5
A/C
DU
AL
PR
ES
SU
RE
SW
A13
A/C
MA
GN
ET
IC C
LUTC
HA
5
14 3
8
LGLG
W-B
L-W
B-L
L-W
W- B
B- R
L- W
B-L
B-R
B-W
B- W
* 1 : 5VZ- FE* 2 : 2RZ- FE, 3RZ- FE
A/C CONTROLASSEMBLY
A25
1
3 2
4
M
2001 TOYOTA TACOMA (EWD440U)
208
AIR CONDITIONING
1. HEATER BLOWER MOTOR OPERATIONWith the ignition SW on, the current from the GAUGE fuse flows to TERMINAL 5 of the HEATER relay to TERMINAL 3 toTERMINAL 8 of the heater blower SW.(Low speed operation)When the heater blower SW is moved to the low speed position, the current applied to TERMINAL 8 of the heater blower SWflows from TERMINAL 1 to GROUND, causing the HEATER relay to come on. Then the current flowing from the HEATERfuse flows to TERMINAL 1 of the HEATER relay to TERMINAL 2 to TERMINAL 1 of the blower motor to TERMINAL 2 toTERMINAL 1 of the blower resistor to TERMINAL 4 to GROUND, causing the blower motor to rotate.At this time, current flows against the full resistance of the blower resistor, so the motor rotates slowly at low speed.(Operation at speed M1, M2)When the heater blower SW is moved to the speed M1 position, the current applied to TERMINAL 8 of the heater blower SWflows to TERMINAL 1 to GROUND, turning the HEATER relay to on. Then, the same as with low speed, current passes fromthe blower motor to TERMINAL 1 of the blower resistor to TERMINAL 2 to TERMINAL 6 of the heater blower SW toTERMINAL 1 to GROUND. At this time, the resistance of the blower resistor is less than it is for low speed, so the blowermotor rotates faster than it does at low speed. With the heater blower SW in the M2 position, current flowing through themotor flows from TERMINAL 1 of the blower resistor to TERMINAL 3 to TERMINAL 5 of the heater blower SW to TERMINAL1 to GROUND. At this time, the resistance of the blower resistor is less than for speed M1, so the blower motor rotates fasterthan for speed M1.(High speed operation)With the heater blower SW in high speed position, until the HEATER relay comes on and current flows to the blower motor,operation is the same as for speed M1 and M2. The current passing through the blower motor flows to TERMINAL 4 of theheater blower SW to TERMINAL 1 to GROUND without flowing through the blower resistor, so that the blower motor rotatesat the fastest speed, high speed.
2. AIR INLET CONTROL SERVO MOTOR OPERATION(Switching from FRESH to RECIRC)With the ignition SW turned on, the current flows from GAUGE fuse to TERMINAL 7 of the air inlet control servo motor toTERMINAL 3 to TERMINAL 6 of the A/C control assembly to TERMINAL 25 to GROUND, the motor rotates and the dampermoves to the RECIRC side. When the damper operates with the A/C SW at RECIRC position, the damper position signal isinput from TERMINAL 1 of the servo motor to TERMINAL 7 of the A/C control assembly. As a result, current to the servomotor circuit is cut off by the A/C control assembly, so the damper stops at that position.(Switching from RECIRC to FRESH)With the ignition SW turned on, when the RECIRC/FRESH SW is switched to the FRESH side, the current flows fromTERMINAL 7 of the air inlet control servo motor to TERMINAL 3 to TERMINAL 6 of the A/C control assembly to TERMINAL25 to GROUND, the motor rotates and the damper stops at that position.
3. AIR VENT MODE CONTROL SERVO MOTOR OPERATIONWhen the ignition SW turned on, the current flows from GAUGE fuse to TERMINAL 2 of the A/C control assembly.(Switching from DEF to FACE)The current flows from TERMINAL 17 of the A/C control assembly to TERMINAL 4 of the air vent mode control servo motorto TERMINAL 8 to TERMINAL 21 of the A/C control assembly to TERMINAL 25 to GROUND. The motor rotates and thedamper moves to the FACE side. When the damper operates with the A/C SW at FACE position, the damper position signalis input from TERMINAL 8 of the servo motor to the TERMINAL 21 of the A/C control assembly. As a result, current to theservo motor circuit is cut off by the A/C control assembly, so the damper stops at that position.(Switching from FACE to DEF)The current flows from TERMINAL 21 of the A/C control assembly to TERMINAL 8 of the air vent control servo motor toTERMINAL 4 to TERMINAL 17 of the A/C control assembly to TERMINAL 25 to GROUND, the motor rotates and thedamper stops at that position.
4. AIR MIX CONTROL SERVO MOTOR CONTROLWhen the temperature control SW is pressed, the A/C control assembly sends a signal to the air mix control servo motor.This signal drives the motor to reach the temperature set by the temperature control SW, and moves the film damper.
5. AIR CONDITIONING OPERATIONWhen the blower SW is set to on, current from the HEATER fuse flows through the HEATER relay (Point side) to A.C fuse toTERMINAL 2 of the A/C dual pressure SW to TERMINAL 1 to TERMINAL 3 of the A/C control assembly. The evaporatortemp. signal from the A/C thermistor are all supplied to the A/C control assembly. When the A/C SW is turned on, the A/CSW on signal is sent to activate the A/C control assembly. Current flows from the A/C control assembly to the magneticclutch, turning the compressor on. The A/C operation is shut off when a signal indicating low evaporator temp., or abnormallyhigh or low refrigerant pressure, is supplied while the engine high speed signal exists. When one of these signals isreceived, the assembly shuts off the A/C operation.
SYSTEM OUTLINE
2001 TOYOTA TACOMA (EWD440U)
209
HEATER RELAY1-2 : Closed with ignition SW on and blower SW on.
A13 A/C DUAL PRESSURE SW1-2 : Open with refrigerant pressure at less than approx. 2.0 kgf/cm2 (28.4 psi, 196 kpa) or
more than approx. 32 kgf/cm2 (455 psi, 3138 kpa).
: PARTS LOCATION
Code See Page Code See Page Code See Page
A530 (5VZ-FE) A27 34 H7 35
A532 (3RZ-FE, 2RZ-FE) A28 34
J9 A31 (5VZ-FE)
A13 34 B4 34J9 A
33 (3RZ-FE, 2RZ-FE)
A15 34 B5 34J10 B
31 (5VZ-FE)
A25 34 E5 A 35J10 B
33 (3RZ-FE, 2RZ-FE)
A26 34 E6 B 35
: RELAY BLOCKS
Code See Page Relay Blocks (Relay Block Location)
2 21 R/B No.2 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
Code See Page Junction Block and Wire Harness (Connector Location)
1B 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
1E 23 Engine Room Main Wire and J/B No.1 (Lower Finish Panel)
1F 23 Cowl Wire and J/B No.1 (Lower Finish Panel)
3F 24 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left)
3I 26 Cowl Wire and J/B No.3 (Behind the Instrument Panel Center)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 44 Engine Room Main Wire and Cowl Wire (Left Kick Panel)
IK2 44 Engine Wire and Cowl Wire (Above the Glove Box)
: GROUND POINTS
Code See Page Ground Points Location
EA40 (5VZ-FE)
Front Left FenderEA42 (3RZ-FE, 2RZ-FE)
Front Left Fender
IE 44 Around the Right Edge of the Reinforcement
IG 44 Around the Left Edge of the Reinforcement
: SPLICE POINTS
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E340 (5VZ-FE)
Engine Room Main WireI10
E342 (3RZ-FE, 2RZ-FE)
Engine Room Main WireI16 44 Cowl Wire
I744 Cowl Wire
I19
I944 Cowl Wire
SERVICE HINTS
2001 TOYOTA TACOMA (EWD440U)
210
I GROUND POINT
BRAKE FLUID LEVELWARNING SW
W- B W- B
W- B
W- B
ENGINE CONTROLMODULE
DATA LINKCONNECTOR 1
ENGINECONTROLMODULE
IGNITER
NOISE FILTER(IGNITION SYSTEM)
COMBINATION METER
DATA LINKCONNECTOR 3
FRONT TURN SIGNALLIGHT LH
PARKING LIGHT LHSTARTER RELAY
PWR OUTLET RELAY
EFI RELAY
HEATER RELAY
FUEL PUMP
LICENSE PLATELIGHT LH
REAR COMBINATIONLIGHT LH
LICENSE PLATELIGHT RH
W- B
I13
I 1
I 5
IK2
9
IK223
2
2
EA
BN1
6
BN1
5
IF113
(E01)
(E02)
(E05)
BR
BR
BR
W- B
W- B
W- B(*2)
BR
BR
BR
BR
BR
BR
BR
(*1)
(*2)
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W-B
W-B
W-B
W-B
PARKING LIGHT RH
FRONT TURN SIGNALLIGHT RH
HEATED OXYGEN SENSOR(BANK 1 SENSOR 2)
REAR DIFF. LOCKDETECTION SW
REAR DIFF. LOCKMOTOR
W- B
W- B
BO16
BO1
7
IG
2
2
BE
BE
BD
BD
BD
BE
DA
AD
AE
AE
AE
AD
A , J10J 9 B
JUNCTIONCONNECTOR
(E1)
(SG)
IDLE AIRCONTROL VALVE
BR
(*2)
(E03)
(E04)
W- B
W- B(*1)
EB : *1EF : *2
W- B
IK212
IK710
(*1) (*2)
BR
POWER SEAT SW(LUMBAR SUPPORT)
EB : *1EF : *2
REAR COMBINATIONLIGHT RH
W-B
ABS ACTUATORWITH ECU
EC
W- B
W- B(GND)
(GND)
W-B
W- B
W- B W- B
W- B
W-B
W-B
1J8
PWR RELAY
FLASHER RELAY
BODY ECU1A2
HIGH MOUNTED STOPLIGHT
W- B
W- B
BU1
1
W- B
W- B
B 4 : *6B 5 : *5
2001 TOYOTA TACOMA (EWD440U)
211
21
3G
COMBINATION SW
133E
183G
153G
REAR DIFF. LOCK ECU
WASHER LEVEL SENSOR
CRUISE CONTROL SW[COMB. SW]
DOOR LOCK CONTROLSW RH
DOOR LOCK MOTOR, DOOR UNLOCKDETECTION SW ANDDOOR KEY LOCK ANDUNLOCK SW RH
WIPER AND WASHER SW[COMB. SW]
UNLOCK WARNING SW
AIR VENT MODECONTROL SERVO MOTOR
A/C CONTROLASSEMBLY
CLOCK
RHEOSTAT
COMBINATION METER
HEATER BLOWER SW
BLOWER RESISTOR
DAYTIME RUNNINGLIGHT RELAY NO. 4
PASSENGER AIRBAGCUT OFF SW
O/D ECU
O/D MAIN SW[SHIFT LOCK CONTROL RELAY]
4WD ECU
2- 4 SELECT SW
GLOVE BOX LIGHT
BUCKLE SW LH
PARKING BRAKE SW
DATA LINKCONNECTOR 3
SHIFT LOCK CONTROL RELAY
CLUTCH START CANCELSW
I16
IE
3F
18
3F
21
3F
15
3F
17
3F
19
3F
13
3F
12
3A16
3A20
3A15
3A13
3A17
3A12
3G19
3G20
3G22
3G17
163G
93B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- BW
-B
W-B
(A/T)
W- B
(M/T)
(A/T)
3F16
POWER WINDOWMASTER SW
REMOTE CONTROLMIRROR SW
IH22
B 2W- B
W- B(*3)
W- B
W- B
143G
73B IL2
2B 3
CRUISE CONTROLACTUATOR
W- B
W- B
W- B
KEY INTERLOCK SOLENOID[UNLOCK WARNING SW]
183A
3E12
W- B W- B3B8
W-B
W- B W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
(A/T)
W- B
W- B
(CG)
DOOR LOCK MOTOR, DOOR UNLOCKDETECTION SW ANDDOOR KEY LOCK ANDUNLOCK SW LH
S 4 Shift Lock Control Relay and O/D Main SW 90980-11614
S 5 Stop Light SW 90980-11118
S 6 Speaker (Front Door LH)90980-10916
S 7 Speaker (Front Door RH)90980-10916
Speaker (Rear LH) (Extra Cab) 90980-11299
S 8 Speaker (Rear LH) (Double Cab, RegularCab) 90980-10825
Speaker (Rear RH) (Extra Cab) 90980-11299
S 9 Speaker (Rear RH) (Double Cab, RegularCab) 90980-10825
S10 Short Connector (ADD) 90980-10799
S11 Short Connector (ADD) 90980-10798
T 1 Throttle Position Sensor 90980-11261
L PART NUMBER OF CONNECTORS
Code Part Name Part Number Code Part Name Part Number
Note: Not all of the above part numbers of the connector are established for the supply.
2001 TOYOTA TACOMA (EWD440U)230
T 2 2-4 Select Motor 90980-11858
T 3 2-4 Select SW 90980-10355
T 4 Transmission Control Relay 90980-10801
T 5 Tweeter LH90980-10906
T 6 Tweeter RH90980-10906
U 1
Unlock Warning SW and Key InterlockSolenoid (A/T) 90980-10795
U 1Unlock Warning SW (M/T) 90980-10860
V 1Vehicle Speed Sensor (ElectronicallyControlled Transmission) 90980-11156
V 3 VSV (EGR) 90980-11162
V 4 VSV (EVAP) 90980-11156
V 8 Vapor Pressure Sensor 90980-11143
V 9 VSV (Vapor Pressure Sensor) 90980-11156
V10 Vehicle Speed Sensor 90980-11143
W 1Washer Motor and Washer Level Sensor(Cold Area Spec.) or Washer Motor (ExceptCold Area Spec.)
90980-10942
W 2Water Temp. Sender (5VZ-FE) 90980-10359
W 2Water Temp. Sender (3RZ-FE, 2RZ-FE) 90980-11428
W 3 Wiper Motor 90980-11599
L
Code Part Name Part Number Code Part Name Part Number
2001 TOYOTA TACOMA (EWD440U) 231
M OVERALL ELECTRICAL WIRING DIAGRAM
2001 TOYOTA TACOMA (EWD440U)
M
2001 TOY
OTA
TAC
OM
A (E
WD
440U)
[A] : System Title
[B] : Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black W = White BR = Brown
L = Blue V = Violet SB = Sky Blue
R = Red O = Orange LG = Light Green
P = Pink Y = Yellow GR = Gray
G = Green
The first letter indicates the basic wire color and thesecond letter indicates the color of the stripe.Example: L - Y
L(Blue)
Y(Yellow)
[C] : The position of the parts is the same as shown inthe wiring diagram and wire routing.
[D] : Indicates the pin number of the connector.The numbering system is different for femaleand male connectors.Example : Numbered in order
from upper left tolower right
Numbered in orderfrom upper right tolower left
Female Male
The numbering system for the overall wiringdiagram is the same as above
[E] : Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguishit from the J/B.Example : Indicates Relay Block No.1
[F] : Junction Block (The number in the circle is theJ/B No. and the connector code is shown besideit). Junction Blocks are shaded to clearlyseparate them from other parts.
3C indicatesthat it is insideJunction BlockNo.3
Example:
[G] : Indicates related system.
[H] : Indicates the wiring harness and wiring harnessconnector. The wiring harness with maleterminal is shown with arrows ( ).Outside numerals are pin numbers.
Female Male ( )
[I] : ( ) is used to indicate different wiring andconnector, etc. when the vehicle model, engine type, or specification is different.
[J] : Indicates a shielded cable.
[K] : Indicates and located on ground point.
[L] : The same code occuring on the next pageindicates that the wire harness is continuous.