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. FOREWORD This wiring diagram manual has been prepared to provide information on the electrical system of the 2004 COROLLA. Applicable models: ZZE130 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 2004 COROLLA Repair Manual Volume 1 Volume 2 Y 2004 COROLLA New Car Features Supplement RM1037U1 RM1037U2 NCF249U 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.
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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.
FOREWORD
This wiring diagram manual has been prepared to provide
information on the electrical system of the 2004 COROLLA.
Applicable models: ZZE130 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. 2004 COROLLA Repair Manual
Volume 1Volume 2
2004 COROLLA New Car FeaturesSupplement
RM1037U1RM1037U2
NCF249U
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.
2003All rights reserved. This book may not bereproduced or copied, in whole or in part, withoutthe written permission of Toyota MotorCorporation.
PART NUMBER OF CONNECTORS L. . . . . . . . . . . . . 210
OVERALL ELECTRICAL WIRING DIAGRAM M. . . . . 214
2004 COROLLA (EWD533U)
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.
2004 COROLLA (EWD533U)
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.
[A]
[B]
[H]
[D]
[F]
[E]
[ I ]
[L]
[M]
[J]
[K]
[G][C]
1
2
IB
IB
3
4
47
2 1 11
13
4
1
2
6
3
1
2
B18
BL
R LG
R
B18G R
3
4
Rea
r C
ombi
natio
n Li
ght R
HR
7
Rea
r C
ombi
natio
n Li
ght L
HR
6
High MountedStop Light
H17
Light Failure Sensor
Stop Light SW
ABS ECU
S 6
CombinationMeter
C 7
BV11 W B
(Shielded)
BV11
I 5G W
IB2
IB1
IE114
BO
50
8L 4
15ASTOP
7.5AGAUGE
From Power Source System (See Page 66)
Stop Light
GR
WB
WB
WB
WB
GB
YG
RL
R
GR
WR
GW
WB
GW
W/G
)
( S/D
)L
L
( ( S/D
)
Sto
p
Sto
p
Rea
r Li
ghts
2004 COROLLA (EWD533U)
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.
2004 COROLLA (EWD533U)
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 indicates thatit is insideJunction BlockNo.3
Example:
[H] : 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)
[I] : 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.
[J] : Indicates a shielded cable.
[K] : 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
[L] : 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.
[M] : Page No.
[N]
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
2004 COROLLA (EWD533U)
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 Brace LH)
: 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
2004 COROLLA (EWD533U)
7
B
[N] : Explains the system outline.
[O] : Indicates values or explains the function for reference during troubleshooting.
[P] : 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
[Q] : 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.
[R] : 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.
[S] : 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.
[T] : 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.
[U] : 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.
2004 COROLLA (EWD533U)
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.
5
5
5
5
4
4
4
4
4BA15
IB18
EA2
ID115
IC33
IA12
E 3
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–BW–B
W–B
W–B
W–B
W–BW–B W–B
W–B
W–B
W–B
W–B
W–B
BR
W–B
BRBR
BR
W–B (4A–GZE)
W–BW–B
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
4
4
3E5
3E6
3G13
3F3
3D1
3B7
W–B
W–B
W–BW–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
I 6
I 6
I 23C7
10
A
A
A
A
A
A
JunctionConnector
J 1
W–B
W–B
W–B
W–B
BR
W–B
W–B
W–B
W–B
W–B
W–B
I GROUND POINT
FAN MAIN Relay
FAN MAIN Relay
A/C Relay No.2
A/C Relay No.3
Radiator Fan Motor
Headlight Cleaner Relay
Headlight LH
Headlight RH
Front Fog Light LH
Brake Fluid Level SW
Front Fog Light RHFront Turn Signal Light RH
Front Clearance Light RH
Front Turn Signal Light LH
Front Clearance Light LH
Door Lock Control SW
Door Courtesy SW RH
Door Lock Motor RH
Door Lock Control Relay
Blower Resistor
Idle–Up SW
A/C Amplifier
Radio and Player
HEATER Relay
Auto Antenna Motor
A/C Control Assembly
Blower Motor
Blower SW
Parking Brake SW
Combination Meter
Combination SW
Cruise Control ECU
Remote Control Mirror SW
Turn Signal Flasher
Defogger SW
Unlock Warning SW
Power Window Master SW
Power Window ControlRelay
Door Courtesy SW LH
Door Lock Control SW
Door Lock Motor LH
Fuel Control SW
Woofer Speaker Amplifier
Combination Meter
Combination Meter
Fuel Sender
Cigarette Lighter
O/D Main SW
Clock
Combination SW
∗ The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
2004 COROLLA (EWD533U)
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.
AC
C
S 2
6
6 5
2
2
2
Battery 30A AM2
Starter
Short Pin
100A ALT
Fusible Link Block
60A ABS
10A ECU–B
7.5A DOME
15A EFI
10A HAZARD
20A RADIO NO.1
10A HORN
20A
10A
Fuse Page
214230112122
194187180166210
ABS
Cigarette LighterCombination Meter
Key Reminder and Seat Belt WarningLight Auto Turn OffTheft Deterrent and Door Lock Control
ABS and Traction ControlCruise ControlElectronically Controlled TransmissionMultiplex Communication System
STOP
System
DOMEHeadlightInterior Light
3 EA2 1 EA1
E 6
E 7
E 7
2
2
22
2
2
2
2
INJECTION Relay
STARTER Relay
B
B
B
B–O 1
1
2
2
3
4
3
4
W–B
W–B
B–W
B–W
E 7
E 7
B
B
W 1.25B FL MAIN
50A MAIN
7.5A AM2
15A HAZ–RADIO
2
2
2
2
2
W
W
EB1
EB1
7
6W–R
I 2 I 2
I 2
W W
W
W
W
1
1
1
1
40A DOOR LOCK CB
7.5A DOME
1 W–L
R
1
1
2
4 3
1
11
1
1 1
1
G
G
W–R
15A TAIL
20A DEFOGB–Y
8 4
3 2
Ignition SWI 8
B–Y1 1
P–L
Battery
15A RAD CIG
2
TAILRelay
Power Source
J POWER SOURCE (Current Flow Chart)
Engine Room R/B (See Page 20)
2
WW
BB
BB
B
W–R
WW
W
G–WA
M2
AM
1
IG2
IG1
W
W
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.
∗ 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
2004 COROLLA (EWD533U)
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.
A 1
L PART NUMBER OF CONNECTORS
A/C Ambient Temp. Sensor
Code
90980–11070
Part Number
D 4 Diode (Courtesy)
Code
90980–11608
A 2 A/C Condenser Fan Motor 90980–11237 D 5 Diode (Interior Light) 90980–10962
A 3 A/C Condenser Fan Relay 90980–10940 D 6 Diode (Moon Roof) 90980–11608
A 4 A/C Condenser Fan Resistor 90980–10928
90980–11271
D 7 Door Lock Control Relay 90980–10848
A 5 A/C Magnetic Clutch
90980–11413
D 8 Door Lock Control SW LH90980–11148
A 6 A/T Oil Temp. Sensor
90980–11151
D 9 Door Lock Control SW RH
A 7 ABS Actuator
90980–11009
Door Courtesy SW LH90980–11097
A 8 ABS Actuator
90980–10941
Door Courtesy SW RH
A 9 ABS Speed Sensor Front LH
90980–11002
Door Courtesy SW Front LH
ABS Speed Sensor Front RH
90980–11856
Door Courtesy SW Front RH90980–11156
Airbag Sensor Front LH Door Courtesy SW Rear LH
Airbag Sensor Front RH Door Courtesy SW Rear RH
A10
A11
A12
A13 Airbag Squib 90980–11194 Door Key Lock and Unlock SW LH90980–11170
90980–11070
D10
D11
D12
D13
D14
D15
D16
D17 Door Key Lock and Unlock SW RH
Part NumberPart NamePart Name
[A] [B] [C]
2004 COROLLA (EWD533U)
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.
To Ignition SWIG Terminal
Fuse
VoltmeterSW 1
Relay
SW 2 Solenoid
[A]
[B]
[C]
Ohmmeter
SW
Ohmmeter
Diode
Digital Type Analog Type
2004 COROLLA (EWD533U)
12
C TROUBLESHOOTING
VOLTAGE CHECK
(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
2004 COROLLA (EWD533U)
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)
2004 COROLLA (EWD533U)
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)
2004 COROLLA (EWD533U)
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
2004 COROLLA (EWD533U)
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.
2004 COROLLA (EWD533U)
17
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
A/C = Air Conditioning
A/T = Automatic Transaxle
ABS = Anti–Lock Brake System
ECU = Electronic Control Unit
ESA = Electronic Spark Advance
EVAP = Evaporative Emission
IAC = Idle Air Control
IC = Integrated Circuit
J/B = Junction Block
LED = Light Emitting Diode
LH = Left–Hand
M/T = Manual Transaxle
O/D = Overdrive
R/B = Relay Block
RH = Right–Hand
SFI = Sequential Multiport Fuel Injection
SRS = Supplemental Restraint System
SW = Switch
TEMP. = Temperature
TVIP = TOYOTA Vehicle Intrusion Protection
VSV = Vacuum Switching Valve
VVT = Variable Valve Timing
w/ = With
w/o = Without
2004 COROLLA (EWD533U)
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
2004 COROLLA (EWD533U)
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
2004 COROLLA (EWD533U)
20
F RELAY LOCATIONS
[Engine Compartment]
[Body]
2004 COROLLA (EWD533U)
21
F
[Instrument Panel]
2004 COROLLA (EWD533U)
22
F RELAY LOCATIONS
1 : Engine Room R/BEngine Compartment Left (See Page 20): Engine Room J/B Engine Compar tment Left (See Page 20)
2004 COROLLA (EWD533U)
23
Memo
2004 COROLLA (EWD533U)
24
F RELAY LOCATIONS
: Instrument Panel J/B Lower Finish Panel (See Page 21)
2004 COROLLA (EWD533U)
25
F
2004 COROLLA (EWD533U)
26
F RELAY LOCATIONS
[Instrument Panel J/B Inner Circuit]
2004 COROLLA (EWD533U)
27
F
2004 COROLLA (EWD533U)
28
F RELAY LOCATIONS
3 : RH R/B Right Side of the Instrument Panel Reinforcement : RH J/B
Right Side of the Instrument Panel Reinforcement (See Page 21)
2004 COROLLA (EWD533U)
29
F
[RH J/B Inner Circuit]
2004 COROLLA (EWD533U)
30
F RELAY LOCATIONS
: Center J/B Behind the Combination Meter (See Page 21)
2004 COROLLA (EWD533U)
31
F
[Center J/B Inner Circuit]
2004 COROLLA (EWD533U)
32
G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
A 1 A/C Magnetic ClutchA 2 A/T Shift Lever Position SW
Back–Up Light SWPark/Neutral Position SW
A 3 ABS Speed Sensor Front LHA 4 ABS Speed Sensor Front RHA 5 Airbag Sensor Front LHA 6 Airbag Sensor Front RHA 7 Ambient Temp. Sensor
D 3 Door Control ReceiverD 4 Door Courtesy SW Front LHD 5 Door Courtesy SW Front RHD 6 Door Courtesy SW Rear LHD 7 Door Courtesy SW Rear RHD 8 Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LHDoor Unlock Detection SW Front LH
D 9 Door Key Lock and Unlock SW Front RHDoor Lock Motor Front RHDoor Unlock Detection SW Front RH
D10 Door Lock Control SW Front LHD11 Door Lock Control SW Front LH
Power Window Master SWD12 Door Lock Control SW Front RHD13 Door Lock Motor Rear LHD14 Door Lock Motor Rear RH
F 8 Front Door Speaker LHF 9 Front Door Speaker RHF 10 Fuel Pump
P 5 Power Window Control SW Front RHP 6 Power Window Control SW Rear LHP 7 Power Window Control SW Rear RHP 8 Power Window Motor Front LHP 9 Power Window Motor Front RHP10 Power Window Motor Rear LHP 11 Power Window Motor Rear RHP12 Pretensioner LHP13 Pretensioner RH
HEAD Relay3–5 : Closed with the light control SW at Head position or the dimmer SW at Flash position
: Closed with the engine running and the parking brake lever is released (Parking brake SW off)
I10 Ignition SW1–3 : Closed with the ignition SW at ACC or ON position1–2 : Closed with the ignition SW at ON or ST position5–6 : Closed with the ignition SW at ON or ST position5–4 : Closed with the ignition SW at ST position
: Parts Location
Code See Page Code See Page Code See Page
G2 32 J6 35
I10 35 J7 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IA25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IB25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF25
IH25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IM 24
( )
1A22 Engine Wire and Engine Room J/B (Engine Compartment Left)
1B22 Engine Wire and Engine Room J/B (Engine Compartment Left)
1C22 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1D22 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA4 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
Service Hints
2004 COROLLA (EWD533U)
51
Memo
2004 COROLLA (EWD533U)
52
Starting and Ignition
1A1
30AMAIN
1
2
1
5 6
4
AM2 IG2
ST2
I10
IM6
15AAM2
IM3
IA42
5 1
3 2
IM1 IL11
MA1
B1
II17
4 2
3 1
IF4
IE
S 8
A
I 7
IA23 II212
AA AA
BE
P
N
9
6
I 9
I 2
IA510
B–R
21
T 3
2
1
II211
AGAG
AG
J 6
S 2(A), S 3(B)
C 8
A 2
J 2(
A) ,
J 3
( B)
J 2(
A)
R
B–WB–W
R
B–R B B
B
B B B B
B B B
R
B
R R
R R
(A/T)
( M/T
)
( A/T
)( A
/T)
( M/T
)
R
( A/T
)( A
/T)B–R
B–W B–R
(*1)(*1)
( *2)
SR
LY
STRelay
Battery
FL MAIN2. 0L
B
B
B B
B
B
B
B
B
B
(*1)
(*1)
(*2)
( *1
M/T
)
(* 1)
(*2)
( *1)
( *2
M/T
)
( *2)
( M/T
)
( A/T
)
(M/T)
(A/T)
( A/T
)
( A/T
)
( M/T
)
W–B
( *1)
R
(A/T)
W–B
B
Par
k/N
eutr
al P
ositi
on S
W
Clu
tch
Sta
rt S
W
Ignition SW
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
JunctionConnector
Starter
Sta
rter
Cut
Rel
ay TVIP
EC
U
2004 COROLLA (EWD533U)
53
EC
B8
E 2
GND
4
IGT
3
IGF
2
A11
1
+B
GND
4
IGF
2
IGT
3
1
+B
GND
4
IGF
2
IGT
3
1
+B
GND
4
IGF
2
IGT
3
1
+B
B9
B
B
(A/T)
(M/T)
1
A8 A9 A10
E 3 E 3 E 3
EA110
IC12
IL5
E 2 E 2
AF AF
BH
AF AF
I 5I 4I 3I 2
A23
N 1
J 2(A), J 3(B)
E 3(A), E 4(B)
B–W
R
( A/T
)
B–W
B–W
B–W
B–W
B–W
B–W
B–W
B–W
B–W B–W B–W
W–B
L–Y
W
W–B
L–Y
GR
W–B
L–Y
Y–G
W–B
L–Y
R–L
Y–G GR
L–Y
WR–LR
L–Y
L–Y
L–Y
W–B
W–BW–BW–B
W–B
( A/T
)
L–Y
* 1 : w/ TVIP System* 2 : w/o TVIP System
Engine Control Module
Ignition Coil andIgniter No. 1
Ignition Coil andIgniter No. 2
Ignition Coil andIgniter No. 3
Ignition Coil andIgniter No. 4
Junction Connector
Noi
se F
ilter
( Ign
ition
)
IGFIGT1 IGT2 IGT3 IGT4
STA
NSW
2004 COROLLA (EWD533U)
54
Starting and Ignition
I10 Ignition SW5–4 : Closed with the ignition SW at ST position5–6 : Closed with the ignition SW at ON or ST position
S2 (A), S3 (B) StarterPoints closed with the shift lever at P or N position and the ignition SW at ST position (A/T)Points closed with the clutch pedal depressed and the ignition SW at ST position (M/T)
: Parts Location
Code See Page Code See Page Code See Page
A2 32 I4 33 N1 33
C8 34 I5 33 S2 A 33
E3 A 34 I10 35 S3 B 33
E4 B 34 J2 A 35 S8 35
I2 33 J3 B 35 T3 35
I3 33 J6 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF 25
IL24
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EA1 38 Engine Wire and Engine Room Main Wire (Inside of the Engine Room R/B)
IA2
IA4 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA5
g ( )
II142 Engine Wire and Instrument Panel Wire (Blower Unit RH)
II242 Engine Wire and Instrument Panel Wire (Blower Unit RH)
: Ground Points
Code See Page Ground Points Location
EC 38 Left Side of the Cylinder Head
IE 40 Behind the Combination Meter
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E238 Engine Wire
I742 Instrument Panel Wire
E338 Engine Wire
I942 Instrument Panel Wire
I2 42 Instrument Panel Wire
Service Hints
2004 COROLLA (EWD533U)
55
Memo
2004 COROLLA (EWD533U)
56
Charging
1A1
B
100A
ALT
1
2
1B1
5A A
LT–S
1
2
1
30A
MA
IN
1
2
1
B–R
IA42
B–R
IM3
15AAM2
IM6
5 6AM2 IG2
ST2
B
WB–G
I10
IG L S B
IC REGULATOR
A2 A1 A3 B1
IL5
IK8
Cha
rge
32
31
C 9
3B9
3B10
II22
AB
BC
3B22
3B20
II214
10AGAUGE
From Power Source System(See Page 48)
IG2
R–W
R–W
Y
R–W
YB
–O
J 4(A), J 5(B)
G 1(A), G 2(B)
R–W Y
W
B–G
Battery
FL MAIN2. 0L
EA15
W
B–W
W
B–G
Com
bina
tion
Met
er
Generator
Ignition SW
JunctionConnector
2004 COROLLA (EWD533U)
57
G1 (A) Generator(A) 3–Ground : 13.2–14.0 volts with the engine running at 5000 rpm and 115°C (239°F)(A) 1–Ground : 0–4 volts with the ignition SW at ON position and the engine not running
: Parts Location
Code See Page Code See Page Code See Page
C9 34 G2 B 32 J4 A 35
G1 A 32 I10 35 J5 B 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IG 25
IKInstrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IM
1A22 Engine Wire and Engine Room J/B (Engine Compartment Left)
1B22 Engine Wire and Engine Room J/B (Engine Compartment Left)
3B 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EA1 38 Engine Wire and Engine Room Main Wire (Inside of the Engine Room R/B)
IA4 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
II2 42 Engine Wire and Instrument Panel Wire (Blower Unit RH)
Service Hints
2004 COROLLA (EWD533U)
58
Engine Control
Battery
1A1
30A
MA
IN
15A
EFI
1 1
IA42
IM3
15A
AM
2
IM6
5 6
4
AM2 IG2
ST2
3 2
5 1
3 2
5 1
1 1 IL5 IK8IC12
EA13 EA110
E 3
IG4 ID19 IG1
1 1
5
4
BH
II19EA19
I10
ED
I 7
IA23 II212
2
1
AA AA
BE
IA510
II211
AG
AG
P
N
9
6
IA21
I10
FL MAIN2. 0L
B
B
W–B
B
BB
B–R
G–R
W–B
B
G–R
B
B
R
R–W
B–W
B–O
B–W
R
R–W
R R
R R
R
BB
B
B
B–W
B–W
B–W B–O
B–W
R–W
R–W
R–W
B–R
B–R
B
2 2
1 1
B–WB–W
EFI
Rel
ay
B–W
( M/T
)
( A/T
)
( M/T
)
( A/T
)
( M/T
)( M
/T)
( A/T
)
( A/T
)
( M/T
)
(A/T)
(M/T)
(A/T)
C/O
PN
Rel
ayF
10
J 2(
A)
A 2
J 2(
A) ,
J 3(
B)
C 8
Par
k/N
eutra
lP
ositi
on S
W
Clu
tch
Sta
rt S
W
Fue
l Pum
p
Ignition SW
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
M
2004 COROLLA (EWD533U)
59
E 3
EC
E 2
E 3 E 3
E 2 E 2
AF AF AF
BH
AF
BB BB
AC AC
I10
2
1
I10
B–O
B–W
R–W
R
B
B
G–R
B
B–W
(A/T)
(M/T)
(A/T)
+B GND +B GND +B GND +B GND
DUTY
IGT IGF IGT IGF IGF IGT IGF IGT
GND VISC
1
1 4 1 4 1 4 1 4
3 2
3 2 3 2 2 3 2 3
R
( A/T
)
R–W R–L
Y–G L–Y
GR
L–Y
W
R–L
L–Y
L–Y
GR
L–Y
WW
–B
B–W
W–B
B–W
W–B
B–W
W–B
B–W
W–B
B–O
B–W
W–B
B–W
W–B
B–W
BBB
W–B
B
( A/T
)
B
( M/T
)
G–R
W–B
W–B
W–B
W–B
W–B
B–L
L–B
BB
W–B
I 2 I 3 I 4 I 5
L–Y
Y–G
J 2(A), J 3(B)
J 4(
A) ,
J 5
( B)
I 1 V 3
Idle
Air
Con
trol
Val
ve
Igni
tion
Coi
l and
Igni
ter
No.
1
Igni
tion
Coi
l and
Igni
ter
No.
2
Igni
tion
Coi
l and
Igni
ter
No.
3
Igni
tion
Coi
l and
Igni
ter
No.
4
Junction Connector
Junc
tion
Con
nect
or
VS
V (
EV
AP
)
B8
B9 D10
D3 A8 A11A10A9 A23
B5 A7 A6 A5 A12
IGT3 IGT4
E03 E01 E02
E 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module
FCSTA RSO
BATT IGT1 IGT2 IGFNSW
EVP
2004 COROLLA (EWD533U)
60
Engine Control
2
1
2
1
2
1
2
1
I10 I10 I10
II18
2
1
10AM–HTR/DEF I–UP
From Power Source System (See Page 48)
IL8
II217 II210
2
1
I10
IG
A
1
I10
1
2
B–O
B–W
B B B
BR
BR
B–O
B–W B–W
B–W
B–W
B–W
B–W
B–W
W
B–YYLWBY
L
W–B
L–R G
L–W
Y–B W
LB
W–B B BR
3 2 4
1 5
I 6 I 7 I 8 I 9 C 2
V 2
P 1
M 1
E 2
J 7
Cam
shaf
t Tim
ing
Oil
Con
trol
Val
ve (
VV
T)
Eng
ine
Coo
lant
Tem
p.
Sen
sor
Inje
ctor
No.
1
Inje
ctor
No.
2
Inje
ctor
No.
3
Inje
ctor
No.
4
JunctionConnector
Mas
s A
ir F
low
Met
er
Pow
er S
teer
ing
Oil
Pre
ssur
e S
W
VS
V (
Can
iste
r C
lose
d V
alve
)
VG E2G THA
+B E2
A1 A2 A3 A4 A15 A14 D13
C1 B28 B29 B24 B32 A20 A19
OCV–OCV+
CCV EC THW
E 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module
THAEVGVGPSW
#10 #20 #30 #40 ELS2
2004 COROLLA (EWD533U)
61
AH AH
BF BF
AH
ID21 ID22
ID26
BD
AB AB
II216
2
1
ID28
ID27
15ATAIL
From Power Source System (See Page 48)
IH7
OFF
Tail
Head
Ligh
tC
ontr
ol S
W
2 5
1 3
3 3
3 3
I 4
15ASTOP
IC14
1
2
IC5 IL1
3C13 3C11
II7
IJ6
B–O
BR
BR
B B
B
B–O
G–W G–W
G
Y
Y
BR
B
BR
BR
Y
Y
BR L
L
Y LG
BR
RR
B
G–W
G–B G
GG
–W
Y
L–W
Y
1 2 1 3
3 2
23 13
GSW2 IDL
BR
II27
BR
BR
J 2(
A) ,
J 3(
B)
V 4
J 2(
A) ,
J 3
( B)
T 1
V 5
( Can
ada)
(Canada)
( US
A)
( US
A)
(USA) (USA)
C12
TAIL
Rel
ay
G–W
G–W
R–W
( w/ C
ruis
e C
ontr
ol)
A13
C14
S 913
10
Airb
ag S
enso
r A
ssem
bly
Combination SW
Cru
ise
Con
trol E
CU
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
Sto
p Li
ght S
W
Thro
ttle
Pos
ition
Sen
sor
Vap
or P
ress
ure
Sen
sor
VS
V (
Vap
or P
ress
ure
Sen
sor)
A28 D21 A18 A21 D4
D12 C19 D14 D16
E2
E 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module
ELS F/PS IDLO
VC VTA TBPPTNK
STP
2004 COROLLA (EWD533U)
62
Engine Control
4B2 4B1 4B4
4B3
II1
6
I10
II218 II29
H 5
H 8
I11
FA
N N
O. 2
Rel
ayLG
–B
FA
N N
O. 1
Rel
ayLG
A/C
SW
G–W
M/G
CLT
Rel
ayY
–B
Pre
ssur
e S
WY
A/C
The
rmis
tor
B–L
1
2
AE AE
BA
2
1
B–O B–O
(*1)
(*1)
BR
BR
B
B B
B W
W W W W( *1)
( *1)
B
2 4
1 3
2 4
1 3
B BR
B B B
( *1) B BR
( *1)
( *1) W
( *1) W
P–B
P
B
+B E1
+B E1
HT OX
HT OX
C 3
C 1
J 2(
A) ,
J 3(
B)
BR
* 1 : Shielded
B( *1)
(* 1)
Cam
shaf
t Pos
ition
Sen
sor
Cra
nksh
aft
Pos
ition
Sen
sor
Hea
ted
Oxy
gen
Sen
sor
( Ban
k 1
Sen
sor
1)
Hea
ted
Oxy
gen
Sen
sor
( Ban
k 1
Sen
sor
2)Ju
nctio
n C
onne
ctor
Def
rost
er M
ode
Det
ectio
n S
W
YA
/C S
WD
efro
ster
Mod
e D
etec
tion
SW
D1B4 B23 C4 B21
D7 D6 C33
A/CS
31 CC2 A13 C32 27 A A34 A26
NE+
+B
E 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module
CFFAN ACLDACMG PRS THR NE– G22+
HT1A OX1A OX1BHT1B
2004 COROLLA (EWD533U)
63
II2
8
AA AA
BA BA BA BA
AA AA AA
EB
3B2 4C3
3B3 4C4
II11
IE
4B21
4B16
7. 5AOBD
From Power Source System (See Page 48)
IJ7
B–O B–O
R–Y
Y–R
B
V–W
(*1)
(*1)
BR
BR
BR
L–R
P–B P
L–R
P–B P BR
W–B
R–B
R–B
( *1)
BR B W
V–W B
Y–R
( *1)
( *1)
( *1)
BR
W–B
R–Y
BR
BR
BR
BR
BR
BR
2
7 13 15 5 4 16
SIL TC WFSE SG CG BAT
D 1
A
J 4(
A) ,
J 5(
B)
J 6
W–B
1
K 1
Data Link Connector 3
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
Kno
ck S
enso
r
B7 B1 B2
D18 D20 D19
D11C14D5C17
E1 EKNK TACH
E 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module
THWO W
SIL TC WFSE
KNK1 SPD
2004 COROLLA (EWD533U)
64
Engine Control
10AGAUGE
From Power Source System (See Page 48)
IG2
3B22
3B203B16
II214
AB
BC
4C8
4C9
I 2
IA614 II24
AC
BC
EB
Spe
edom
eter
Tach
omet
er
32 4
33 8 19 10 9
17 3 1 2
Y–R B
V–W
W–G
R–W
R–W
B–O
R–W
B–O
R–Y
Y–R
B
V–W
Mal
func
tion
Indi
cato
r La
mp
( w/o
AB
S)
R–W
( w/o
AB
S)
R–W
( w/o
AB
S)
SP1
BR
( w/o
AB
S)
( w/o
AB
S)
BR
( w/o
AB
S)
W–G
( w/o
AB
S)
W–G
( w/ A
BS
)
W–G
( w/ A
BS
)
W–G
V 1
S 1
J 2(
A) ,
J 3(
B)
J 4(
A) ,
J 5
( B)
C 9
Skid Control ECUwith Actuator
Com
bina
tion
Met
er
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
Vehicle Speed Sensor(Combination Meter)
2004 COROLLA (EWD533U)
65
The engine control system utilizes a microcomputer and maintains overall control of the engine, etc. An outline of enginecontrol is given here.
1. Input Signals(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 engine coolant temp. Thus the engine coolant temp. is input as a control signal to TERMINALTHW of the engine control module.
(2) Intake air temp. signal systemThe intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as acontrol signal to TERMINAL THA of the engine control module.
(3) Power steering oil pressure signal systemPower steering oil pressure is detected by the power steering oil pressure SW and is input as a control signal toTERMINAL PSW of the engine control module.
(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 inputinto 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 is detected by the ABS speed sensor and the signal is input to TERMINAL SPD of the engine controlmodule via the comb. meter and the skid control ECU with actuator. (w/ ABS)The vehicle speed is detected by the vehicle speed sensor installed in the transaxle and the signal is input toTERMINAL SPD of the engine control module via the comb. meter. (w/o ABS)
(7) NSW signal system (A/T)The Park/Neutral position SW detects whether the shift position is in neutral or not, and inputs a control signal toTERMINAL NSW of the engine control module.
(8) A/C SW signal systemThe operating voltage of the A/C SW is detected and is input as a control signal to TERMINAL A/CS of the enginecontrol module.
(9) 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.
(10) Intake air volume signal systemIntake air volume is detected by the mass air flow meter, and is input as a control signal to TERMINAL VG of the enginecontrol module.
(11) STA 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)Oxygen sensor signal systemThe oxygen density in the exhaust gases is detected and is input as a control signal into TERMINALS OX1A and OX1Bof the engine control module. To maintain stable detection performance by the oxygen sensor, a heater is used forwarming the sensor. The heater is also controlled by the engine control module (HT1A and HT1B).
(13)Engine knock signal systemEngine knocking is detected by the knock sensor and input as a control signal to TERMINAL KNK1 of the engine controlmodule.
(14)Electrical load signal systemWhen systems which cause a high electrical load such as the rear window defogger, taillight are turned on, a signal isinput to TERMINALS ELS and ELS2 as a control signal.
(15)Vapor pressure signal systemVapor pressure is detected by the vapor pressure sensor and is input as a control signal to TERMINAL PTNK of theengine control module.
System Outline
2004 COROLLA (EWD533U)
66
Engine Control
2. Control System∗ SFI system
The SFI system monitors the engine conditions through the signals, which are input from each sensor to the enginecontrol module. Based on this data and the program memorized in the engine control module, the most appropriate fuelinjection timing is decided and current is output to TERMINALS #10, #20, #30 and #40 of the engine control module,operating the injectors (to inject fuel). This is the system which finely controls the fuel injection in response to the drivingconditions, through the engine control module.
∗ ESA systemThe ESA system monitors the engine conditions using the signals, which are input to the engine control module from eachsensor. Based on this data and the program memorized in the engine control module, the most appropriate ignition timingis decided and current is output to TERMINALS IGT1, IGT2, IGT3 and IGT4 of the engine control module. This outputcontrols the ignition coil and igniter No. 1 , No. 2 , No. 3 and No. 4 to produce the most appropriate ignition timing for thedriving conditions.
∗ IAC systemThe IAC system increases the RPM and provides idle stability for fast idle–up when the engine is cold, and when the idlespeed has dropped due to electrical load and so on. The engine control module evaluates the signals from each sensor,and outputs current to TERMINAL RSO to control the idle air control valve.
∗ Knock control systemKnock control system controls the gate based on the engine rotation speed and detects knocking by the peak value of theknock sensor output during the gate open period, and then controls it to the most suitable ignition timing in proportion tothe driving condition.
∗ Evapoparge control systemThis system leads the vapor stuck to the canister to the serge tank in order not to agitate the air fuel by adjusting the fuelinjection volume.The signal at this time will be output from TERMINAL EVP of the engine control module to VSV (EVAP).
3. Diagnosis SystemWith the diagnosis system, when there is a malfunctioning in the engine control module signal system,the malfunctionsystem is recorded in the memory. The malfunctioning system can be found by reading the display (Code) of the malfunctionindicator 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 the data (Standard values)recorded in the engine control module memory or else stops the engine.
2004 COROLLA (EWD533U)
67
C/OPN Relay5–3 : Closed with the starter running and the engine running
EFI Relay5–3 : Closed with the ignition SW at ON or ST position
TBP–E1 : 9.0–14.0 volts (Ignition SW on)PTNK–E1 : 3.0–3.6 volts (Ignition SW at ON position and remove fuel cap)
OX1A, OX1B–E1 : Pulse generation (Maintain engine speed at 2500 rpm for two minutes after warming up.)HT1A, HT1B–E1 : 9.0–14.0 volts (Ignition SW at ON position)
II142 Engine Wire and Instrument Panel Wire (Blower Unit RH)
II242 Engine Wire and Instrument Panel Wire (Blower Unit RH)
2004 COROLLA (EWD533U)
69
: Ground Points
Code See Page Ground Points Location
EB38 Left Side of the Cylinder Head
EC38 Left Side of the Cylinder Head
ED 38 Front Left Suspension Tower
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
BH 44 Under the Left Quarter Pillar
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E238 Engine Wire
I7 42 Instrument Panel Wire
E338 Engine Wire
I1042 Engine Wire
I242 Instrument Panel Wire
I1142 Engine Wire
I442 Instrument Panel Wire
2004 COROLLA (EWD533U)
70
Headlight
From Power Source System (See Page 48)
IG2
3B8
3B10
3B16
R–W
10A
GA
UG
E
R–W
12
8
II22
L
1
3B22
3B12
OFF Low
Head
High
Dim
mer
SW
Tail
Flash
Ligh
tC
ontro
l SW
3C6
3C4
Y R
3C5
IE
AA
IA43
ED
C12
15 7 2
13 12 8
IE11 IE13 IE12
20 19 18
A18
1 4 3
G–Y
G–B
G–W
G–Y
G–O
G–R
Y R
Y
W–B
W–B
W–B
10 11
R
G–W
W–B
W–B
D 2
G 1
A
W–BW–B
R–W
J 6
R–W
3
R–B
10A
EC
U–B
IH1
R–B
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
CSB CSO CSE
ER
–Y
R–Y
16
( *1)
(* 1)
9
( *1)
1
15A
DO
ME
L–W
L–W
1
2
CLTB CLTS CLTE
Automatic LightControl Sensor
Combination SW
Daytime Running Light Relay
Gen
erat
or
JunctionConnector
T H HI
IG+B
CHG
4B
11
4B
21
2004 COROLLA (EWD533U)
71
From Power Source System (See Page 48)
40AHEADMAIN
1
1
11
R–B
R–B
P 3
2 5
1 3
1 1
1 1
IA24 1
10AHEAD LHLWR
1
2
1
10AHEAD RHLWR
1
2
1
1
2
1
2
IA41
61101314
IA515 IA515
B
B
2
1
B 2
J 1
G–B
W–R
R–W
R–W
R–B
R–Y
R–W
R–W
R–W
W–B
W–B
W–R
G–B(*1)
W–B
R–W
R–Y
R–Y
R–B
R–W R
R–B
R–B
R–B
W–B
R–W
D 2
R–B
R–B
R
R
HEADRelay
R–B
DRL
H 2
H 4
( *2)
( *2)
( *3)
( *3)
( *1)
* 1 : USA* 2 : w/ ABS* 3 : w/o ABS
L–W L–W
2
1
I 3
Bra
ke F
luid
Lev
elW
arni
ng S
W
Daytime Running Light Relay
Hea
dlig
ht L
H (
Low
)
Hea
dlig
ht R
H (
Low
)Junc
tion
Con
nect
or
ParkingBrake SW
4
G–O
FOG
Com
bina
tion
SW
PKB
TAIL DIM H–LPBRK
(*4)
* 4 : w/ Fog Light
12
S 1
Ski
d C
ontr
ol E
CU
with
Act
uato
r
PKB
2004 COROLLA (EWD533U)
72
Headlight
1
10AHEAD LHUPR
1
2
1
10AHEAD RHUPR
1
2
1
5 2
3 1
1 1
1 1
IA210IA66
ED EA
1
2
1
2
14
13
5 4 18
Hig
h B
eam
5 2
3 1
3 3
3 3
15ATAIL
From Power Source System (See Page 48)
IH7
R–W
L–W
R–B
4C19
4C20
IL4
IC7
G–WR–B G–W
R
W–R G
G–B
R
L–W
R–W G
L–W
R–B
L–W
RR
R–W
R
W–B
W–B
W–B
W–R
W–B
W–B
R–W R
W–B
W–R
G–B(*1)
W–B
C 9H 1
H 3
( *1)
( *1)
( *1)
(* 1)
( *1)
W–B
* 1 : USA
TAIL
Rel
ay
DIM
ME
R R
elay
E 4
Combination Meter
Hea
dlig
ht L
H (
Hig
h)
Hea
dlig
ht R
H (
Hig
h)
2004 COROLLA (EWD533U)
73
The current is always flowing from the HEAD MAIN fuse to HEAD relay (Coil side) to TERMINAL 6 of the daytime runninglight relay, from ECU–B fuse to TERMINAL 3 of the daytime running light relay and from the TAIL fuse to TAIL relay (Coilside) to TERMINAL 14 of the daytime running light relay (USA).When the ignition SW is turned on, the current flowing through the GAUGE fuse flows to TERMINAL 12 of the daytimerunning light relay.
1. Daytime Running Light OperationWhen the engine is started, voltage generated at TERMINAL L of the generator is applied to TERMINAL 8 of the daytimerunning light relay. If the parking brake lever is pulled up (Parking brake SW on) at this time, the relay is not activated so thedaytime running light system does not operate. If the parking brake lever is then released (Parking brake SW off), a signal isinput to TERMINAL 11 of the relay.This activates the daytime running light relay and the HEAD relay is turned to on, so the current flows from the HEAD MAINfuse to the HEAD relay (Point side) to HEAD LH LWR, HEAD RH LWR fuses to TERMINAL 2 of the headlights to TERMINAL1 to TERMINAL 1 of the daytime running light relay to TERMINAL 2 to GROUND, causing the headlights to light up(Headlights light up dimmer than normal brightness.). Once the daytime running light system operates and the headlightslight up, the headlights remain on even if the parking brake lever is pulled up (Parking brake SW on).If the engine stalls and the ignition SW remains on, the headlights remain light 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 the parking brake lever released (Parking brake SW off), the daytime running light systemoperates and headlights light up when the engine starts.
2. Headlight OperationWhen the light control SW is switched to Head position and the dimmer SW is set to Low position, causing the daytimerunning light relay and the HEAD relay to turn on, so the current flows from the HEAD MAIN fuse to HEAD relay (Coil side) toTERMINAL 6 of the daytime running light relay to TERMINAL 7 to TERMINAL 12 of the light control SW to TERMINAL 11 toGROUND. The current to HEAD relay (Point side) then flows to HEAD LH LWR, HEAD RH LWR fuses to TERMINAL 2 of theheadlights (Low) to TERMINAL 1 to TERMINAL 1 of the daytime running light relay to TERMINAL 2 to GROUND, causingthe headlights to light up at normal intensity.When the light control SW is switched to Head position and the dimmer SW is set to High position, the signal from thedimmer SW is input to the daytime running light relay. This activates the daytime running light relay and the HEAD relay isturned on, so the current flows from the HEAD MAIN fuse to HEAD relay (Point side) to TERMINAL 1 of the DIMMER relay toTERMINAL 2 to TERMINAL 13 of the daytime running light relay, activating the DIMMER relay. This causes current to flowfrom TERMINAL 3 of the DIMMER relay to TERMINAL 5 to HEAD LH UPR, HEAD RH–UPR fuses to TERMINAL 2 of theheadlights (High) to TERMINAL 1 to GROUND, causing the headlights to light up at high beam and the high beam indicatorlight to light up.When the dimmer SW is switched to Flash position, the signal from the dimmer SW is input to the daytime running light relay.This activates the daytime running light relay and the HEAD relay is turned on, so the current flows from the HEAD MAINfuse to HEAD relay (Point side) to TERMINAL 1 of the DIMMER relay to TERMINAL 2 to TERMINAL 13 of the daytimerunning light relay, activating the DIMMER relay, and also flows from the HEAD LH UPR, HEAD RH UPR fuses toTERMINAL 2 of the headlights to TERMINAL 1 to GROUND, causing the headlights to light up at high beam and the highbeam indicator light to light up.
3. Automatic Light Control Operation (USA)When the daytime running light is operating and the Automatic control sensor detects a decrease in the ambient light, theautomatic light control operation starts. At the same time, daytime running light relay is activated, so current flows from theTAIL fuse to the TAIL relay (Coil side) to TERMINAL 14 of the daytime running light relay, and the HEAD MAIN fuse to theHEAD relay (Coil side) to TERMINAL 6 of the daytime running light relay, activating both the TAIL relay and the HEAD relay,so that the taillights and headlights light up.When the automatic light control sensor detects an increase in the ambient light, the ignition SW is turned to off, the lightcontrol SW is turned to Head position, and the automatic light control operation stops.
System Outline
2004 COROLLA (EWD533U)
74
Headlight
HEAD Relay1–2 : Closed with the light control SW at Head position or the dimmer SW at Flash position
Closed with the engine running and the parking brake lever is released (Parking brake SW off)
D2 Daytime Running Light Relay12–Ground : Approx. 12 volts with the ignition SW at ON position
7–Ground : Approx. 12 volts with the light control SW at Head position or the dimmer SW at Flash position3, 6, 14–Ground : Always approx. 12 volts
11–Ground : Continuity with the parking brake lever pulled up8–Ground : 13.2–14.0 volts with the engine running at 5000 rpm and 115°C (239°F)2–Ground : Always continuity
16–Ground : Continuity with the dimmer SW at High or Flash position10–Ground : Continuity with the brake fluid level not enough or the parking brake lever pulled up
: Parts Location
Code See Page Code See Page Code See Page
A18 34 G1 32 J1 33
B2 32 H1 32 J6 35
C9 34 H2 32 P3 35
C12 34 H3 32 S1 33
D2 34 H4 32
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IG25
IH25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24
( )
3B28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA2
IA440 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA540 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA6
IE1 42 Instrument Panel Wire and Instrument Panel No.4 Wire (Behind the Combination Meter)
II2 42 Engine Wire and Instrument Panel Wire (Blower Unit RH)
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
ED 38 Front Left Suspension Tower
IE 40 Behind the Combination Meter
Service Hints
2004 COROLLA (EWD533U)
75
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E4 38 Engine Room Main Wire I3 42 Engine Room Main Wire
2004 COROLLA (EWD533U)
76
Fog Light
10AECU–B
From Power Source System (See Page 48)
IH1
10AGAUGE
IG2
3B22
3B12
OFF Low
Head
High
Dim
mer
SW
Tail
Flash
Ligh
tC
ontr
ol S
W
IE
11
AJ 6
W–B
12 8 9
C12
3C43C5
3C6
EA
15AFOG
1
1
2
1
2 3
1 5
1
1 1
OFF
On
Fog
Ligh
tS
WIA59
2
4C12
2
1
ED
1
2 F 2
F 1
R–W G
R–B
R–W
R–Y R
R–Y
R R
W–B
W–B
RR
R–Y
G–O
G–O
R
W–B
R
G
FOGRelay
Combination SW
Combination SW
Fro
nt F
og L
ight
LH
Fro
nt F
og L
ight
RH
JunctionConnector
7 16 4
3 12D 2
FOG
Daytime Running Light Relay
H HI
IG+B
2004 COROLLA (EWD533U)
77
FOG Relay3–5 : Closed with light control SW at Head position, dimmer SW at Low position and fog light SW at On position
: Parts Location
Code See Page Code See Page Code See Page
C12 34 F1 32 J6 35
D2 34 F2 32
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
3B28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA5 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
ED 38 Front Left Suspension Tower
IE 40 Behind the Combination Meter
Service Hints
2004 COROLLA (EWD533U)
78
Turn Signal and Hazard Warning Light
10AGAUGE
IG2
10AHAZARD
From Power Source System (See Page 48)
1
3B22
3B15
IG6IH13IH5IH11IK1IL9
IC1 ID17 ID12IC8 IG5IH12
4
3
4
3
2
3
2
3
BIEAED
W–B
IA58
3 2
2
24 25
F 3
F 4
R 9
R11
C 9
T 2
R–W
G–W
G–W
R–W
G–B
G–Y
G–B
G–Y
W–B
W–B
W–B
W–B
G–B
G–Y
1 4
LL LR
W–B
IG +B
Turn
Turn
G–Y
G–B
LH RH
2
1
G–B
G–Y
Com
bina
tion
Met
er
Fro
nt T
urn
Sig
nal L
ight
RH
Fro
nt T
urn
Sig
nal L
ight
LH
Rea
r C
ombi
natio
n Li
ght L
H
Rea
r C
ombi
natio
n Li
ght R
H
Turn Signal Flasher Relay
2004 COROLLA (EWD533U)
79
3 3C
3C2
21 3A
3A11
LH
RHTur
n S
W
2
3
IG
A
15 4B
4B21
17 4B
4B18
IE
W–B
J 7
7 5 6
6
8
5 7
H 7
C12
T 2
W–B
G–R
G–O
Y–B
Y–B
Y–B
W–B
W–B
W–B
W–B
GND EL ER HAZ
( *1)
( *2)
( *1)
* 1 : w/ Wireless Door Lock* 2 : w/o Wireless Door Lock
AJ 6
Combination SW
Hazard SW
JunctionConnector
JunctionConnector
Turn Signal Flasher Relay
2004 COROLLA (EWD533U)
80
Turn Signal and Hazard Warning Light
T2 Turn Signal Flasher Relay1–Ground : Approx. 12 volts with the ignition SW at ON position7–Ground : Always continuity4–Ground : Always approx. 12 volts
: Parts Location
Code See Page Code See Page Code See Page
C9 34 H7 35 R11 37
C12 34 J6 35 T2 35
F3 32 J7 35
F4 32 R9 37
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
ID 25 Floor Wire and Instrument Panel J/B (Lower Finish Panel)
IG25
IH25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)IK
24
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL24
3A
3B 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C
( g )
4B 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA5 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
ED 38 Front Left Suspension Tower
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
BI 44 Lower Back Panel
Service Hints
2004 COROLLA (EWD533U)
81
Memo
2004 COROLLA (EWD533U)
82
Taillight
OFF
Tail
Head
IE
A
4B11
4B21
2 5
1 3
3 3
3 3
15ATAIL
IB1
I 4
13
10
Ligh
tC
ontr
olS
W
G
( US
A)
G–B
( US
A)
G–W
( US
A)
BW
G–W
( US
A)
W–B
( US
A)
W–B
( US
A)
G
(Canada)
TAILRelay
J 6
C12
IL2 IC2 ID2
A
A
2
1F
3 2
1
ED EA
F 4
J 1
GG GG G
W–B
W–B
G
A
IH7
100AALT
1C1
1A1
Battery
G–W
G–W
(USA)
( Can
ada)
FL MAIN2. 0L
W–B
2
1
Combination SW
Fro
nt P
arki
ng L
ight
LH
Fro
nt P
arki
ng L
ight
RH
Junc
tion
Con
nect
or
JunctionConnector
14
15
D 2Daytime RunningLight Relay
TAIL
T
2004 COROLLA (EWD533U)
83
4
1
4
1
Tail
Tail
1
2
1
2
AC AC
BB BB
R 9
R11
L 1
L 2
BI BH
AC
J 8(A)
J 8(A), J 9(B)
G
W–B
W–B
W–B
W–B
W–B
W–B
G G G G
G G
JunctionConnector
Junction Connector
Lice
nse
Pla
te L
ight
LH
Lice
nse
Pla
te L
ight
RH
Rea
r C
ombi
natio
n Li
ght
LH
Rea
r C
ombi
natio
n Li
ght
RH
AA
AA
AA
2004 COROLLA (EWD533U)
84
Taillight
C12 Combination SW10–13 : Continuity with the light control SW at Tail or Head position
TAIL Relay5–3 : Closed with the light control SW at Tail or Head position
: Parts Location
Code See Page Code See Page Code See Page
C12 34 J1 33 L1 36
D2 34 J6 35 L2 36
F3 32 J8 A 36 R9 37
F4 32 J9 B 36 R11 37
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IB25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IC25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
ID 25 Floor Wire and Instrument Panel J/B (Lower Finish Panel)
IH 25Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
With the ignition SW turned on, the current flows to TERMINAL 8 of the wiper and washer SW, TERMINAL 2 of the frontwiper motor through the WIPER fuse, and the current flows to TERMINAL 2 of the washer motor through the WASHER fuse.
1. Low Speed PositionWith wiper SW turned to LO position, the current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 7to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND and causes to the front wiper motor to run at lowspeed.
2. High Speed PositionWith wiper SW turned to HI position, the current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 9to TERMINAL 4 of the front wiper motor to TERMINAL 5 to GROUND and causes to the wiper 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 8 of the front wiper and washer SW to TERMINAL 5 to GROUND. This flow of current operates the intermittentcircuit and the current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the frontwiper motor to TERMINAL 5 to GROUND and the functions.The intermittent operation is controlled by the charge/discharge function of the condenser installed in the relay, and theintermittent time is controlled by a time control SW (w/ intermittent volume SW) to change the charging time of thecondenser.
4. MIST PositionWith wiper SW turned to MIST position, the current flows from TERMINAL 8 of the front wiper and washer SW to TERMINAL7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND and causes to the front wiper motor to run at lowspeed.
5. Washer Continuous OperationWith the washer SW turned to on, the current flows from TERMINAL 2 of the washer motor to TERMINAL 1 to TERMINAL 4of the front wiper and washer SW to TERMINAL 5 to GROUND and causes to the washer motor to run, and the windowwasher jet operates. This causes the current to flow to washer continuous operation circuit in TERMINAL 8 of the front wiperand washer SW to TERMINAL 7 to TERMINAL 1 of the front wiper motor to TERMINAL 5 to GROUND and the washeroperates continuously.
C11 Combination SW5–Ground : Always continuity8–Ground : Approx. 12 volts with ignition SW at On position7–Ground : Approx. 12 volts with wiper and washer SW at LO position
: Approx. 12 volts with wiper and washer SW at MIST position: Approx. 12 volts every approx. 1 to 10 seconds intermittently with wiper and washer SW at INT position
6–Ground : Approx. 12 volts with ignition SW on unless wiper motor at STOP position9–Ground : Approx. 12 volts with ignition SW on and wiper and washer SW at HI position
F6 Front Wiper Motor2–3 : Closed unless wiper motor at STOP position
: Parts Location
Code See Page Code See Page Code See Page
C11 34 F6 32
F5 32 J6 35
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA2 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
System Outline
Service Hints
2004 COROLLA (EWD533U)
100
Wiper and Washer
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
IE 40 Behind the Combination Meter
2004 COROLLA (EWD533U)
101
Memo
2004 COROLLA (EWD533U)
102
Horn
10AHORN
From Power Source System (See Page 48)
1
2 3
1 5
1 1
1 1
4A12
4A13
1
C10
H 6
HORNRelay
B–W
G–Y
G–Y
B
B–W
G–Y
( *2)
G–Y
( *1)
( *1)
Hor
n
* 1 : w/ Wireless Door Lock
1
2
* 2 : w/o Wireless Door Lock
Combination SW
Horn
IA518
2004 COROLLA (EWD533U)
103
HORN Relay5–3 : Closed with the horn SW on.
: Parts Location
Code See Page Code See Page Code See Page
C10 34 H6 32
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
4A 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA5 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
Service Hints
2004 COROLLA (EWD533U)
104
Cigarette Lighter
15ACIG
From Power Source System (See Page 48)
IF8
1
2
IE
A
3A10
3A9
GR
GR
W–B
C 5
J 6
CigaretteLighter
JunctionConnector
2004 COROLLA (EWD533U)
105
C5 Cigarette Lighter2–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
C5 34 J6 35
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IF 25 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3A 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
Service Hints
2004 COROLLA (EWD533U)
106
Clock
15ADOME
1
15ACIG
IF8
IC7
IL4
4C20
4C16
3A10
3A5
3A18
3A11
IG
A
OFF
Tail
Head
IE
A
4B11
4B21
2 5
1 3
3 3
3 3
15ATAIL
From Power Source System (See Page 48)
IH7
1 4
3 2
13
10
Ligh
tC
ontr
olS
W
L–W
L–W
L–W
GR
GR
W–B
W–B
G
G
( US
A)
G–B
( US
A)
G–W
( US
A)
G–W
( Can
ada)
G–W
( US
A)
G–W
( US
A)
W–B
( US
A)
W–B
( US
A)
I 4G
(Canada)
TAILRelay
C 7
J 6 J 7
C12Combination SW
Clock
JunctionConnector
JunctionConnector
2
1
14
15
D 2Daytime RunningLight Relay
TAIL
T
2004 COROLLA (EWD533U)
107
C7 Clock4–Ground : Approx. 12 volts with the ignition SW at ACC or ON position1–Ground : Always approx. 12 volts3–Ground : Approx. 12 volts with the light control SW at Tail or Head position2–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
C7 34 D2 34 J7 35
C12 34 J6 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF25
IH25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24
( )
3A 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I4 42 Instrument Panel Wire
Service Hints
2004 COROLLA (EWD533U)
108
Power Outlet
15AP/POINT
IH6
3A10
3A6
1 5
2 3
3 3
3 3
3A12
3A11
IG IE
IF11
IF12
15ACIG
From Power Source System (See Page 48)
IF8
2
1
GR L
GR
W–B
W–B
L–Y
W–B
W–B
L–Y
P 4
P–POINTRelay
A AJ 7JunctionConnector
Power Outlet(Rear)
3A9
2
1
GR
W–B
C 5Power Outlet(Front)
A
Junc
tion
Con
nect
or
J 6
GR
2004 COROLLA (EWD533U)
109
P–POINT Relay3–5 : Closed with ignition SW at ACC or ON position
1–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
C5 34 J7 35
J6 35 P4 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
3A 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 42 Console Box Wire and Instrument Panel Wire (Under the Instrument Panel Center)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
Service Hints
2004 COROLLA (EWD533U)
110
Remote Control Mirror
SelectSW
OperationSW
RightLeftRightLeft
Right/Down
Left/Up
DownUpRightLeft
M MMM
15ACIG
From Power Source System (See Page 48)
IF8
3A10
3A8
4B22
4B21
IE
A
5 2 4 3 6 7
3C16
3C14 3C15
8
GR
L R LG R–W
BR
–W
W–B
W–B
BR
–W
BR
–W
BR
–W BR
–W
RLG
GR
HL HR VL VR M+ E
B
R 6
MH MV
M+
MH MV
M+
J 6
IC210 IC28 IJ110 IJ18
L
R–W
IJ19 IC29
BR
–W
2 2
1 3 1 3
R17
R18
JunctionConnector
Rem
ote
Con
trol
Mirr
or L
H
Rem
ote
Con
trol
Mirr
or R
H
Remote Control Mirror SW
2004 COROLLA (EWD533U)
111
R6 Remote Control Mirror SW8–6 : Continuity with the operation SW at Down or Right position6–7 : Continuity with the operation SW at Up or Left position
8–Ground : Approx. 12 volts with the ignition SW at ACC or ON position7–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
J6 35 R17 37
R6 35 R18 37
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IF 25 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3A28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IC2 40 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IJ1 42 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
Service Hints
2004 COROLLA (EWD533U)
112
Automatic Glare–Resistant EC Mirror with Compass
10AGAUGE
From Power Source System (See Page 48)
IE5
IG
IE1
IH10
B 1
6
A
7B
–LB
W–B
W–B
J 7
I12
JunctionConnector
Inner Mirror
( *1)
( *1)
B ( *2)
* 1 : w/ Moon Roof* 2 : w/o Moon Roof
2004 COROLLA (EWD533U)
113
I12 Inner Mirror7–Ground : Approx. 12 volts with the ignition SW at ON position6–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
I12 36 J7 35
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IH 25 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
: Ground Points
Code See Page Ground Points Location
IG 40 Right Kick Panel
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
B1 44 Roof Wire
Service Hints
2004 COROLLA (EWD533U)
114
Power Window
10AGAUGE
30APOWER
From Power Source System (See Page 48)
2 3
1 5
IF4 ID18
IE
A
IC16
4 5
IG
7
4B
10
4B6 4B9
4B7
IC11 IC32
4B8
6 7
B
B B
W–B B B B
W–B A
W–B
W–B
B B
B B
P 8
1 3 4 9
W–B
W–B Y G
D11
2
1
Y G
J 6
P/WRelay
JunctionConnector
Power Window Master SW
Power Window MotorFront LH
IC
Front LHB B
E E DU DD
Down
B
B
B
M
B 4
2004 COROLLA (EWD533U)
115
SU SU SU
D D D
SD SD SDB B B
UUU
Up
Dow
n
Up
Dow
n
Up
Dow
n
3 1
Y G
3 1
Y G G
1
Y
3
IC31 IC37 IC36 IC35 IC34 IC33
ID13 ID14
BB15BB14BB12BA15BA14BA12IJ25IJ24IJ26
18 15 12 13 10 16
G–R
L–W
R–G L–B
R–B
L–R
R–G L–B
R–B
L–R
R–G L–B
G–R
L–W B
P 9 P10 P11
B
5 2
4
5 2
4
5 2
4
P 5
P 6
P 7
D11
B
G–R
L–W B
R–B
L–R B
R–B
L–R
4 5 5 4 5 4
Pow
er W
indo
w C
ontr
olS
W F
ront
RH
Pow
er W
indo
w C
ontr
olS
W R
ear
LH
Pow
er W
indo
w C
ontr
olS
W R
ear
RH
Power Window Master SW
Power Window MotorFront RH
Power Window MotorRear LH
Power Window MotorRear RH
RRURLDRLUPD
Window Lock SW
Lock
Normal
Front RH Rear RHRear LH
PU RRD
B
B
B
MM M
2004 COROLLA (EWD533U)
116
Power Window
When the ignition SW is turned on, the current flows through the GAUGE fuse to TERMINAL 1 of the P/W relay toTERMINAL 2 to GROUND. This activates the relay and the current flows through the POWER fuse to TERMINAL 5 of therelay to TERMINAL 3 to TERMINAL B of the power window master SW, TERMINAL 4 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 (Front LH) in Up position, the current flowing toTERMINAL B of the power window master SW flows to TERMINAL DU of the master SW to TERMINAL 4 of the powerwindow motor to TERMINAL 5 to TERMINAL DD of the master SW to TERMINAL E to GROUND and rotates the powerwindow motor in the up direction. The window ascends only while the SW is being pulled. In down operation, the flows ofcurrent from TERMINAL B of the power window master SW to TERMINAL DD to TERMINAL 5 of the motor to TERMINAL 4to TERMINAL DU of the master SW to TERMINAL E to GROUND, flowing in the opposite direction to manual up operationand rotating the motor in reverse, thus opening the window.
2. Auto Down Operation (Driver’s Window)When the front LH window control SW in the power window master SW is pushed strongly on the down side, current flowsfrom TERMINAL B of the master SW to TERMINAL DD to TERMINAL 5 of the power window motor to TERMINAL 4 toTERMINAL DU of the master SW to TERMINAL E to GROUND. Because the hold circuit inside the master SW keeps therelay on the down side activated, the power window motor continues operating even if the power window master SW isreleased. When the driver’s window is fully opened, the hold circuit turns off and the relay on the down side turns off, andauto down operation is completed.
3. Stopping of Auto Down Operation (Driver’s Window)When the master SW (Front LH) is pulled to the up side during auto down operation, a ground circuit opens in the masterSW and current does not flow from TERMINAL DU of the master SW to TERMINAL E, so the motor stops, causing autodown operation to stop. If the master SW is pulled continuously, the motor rotates in the up direction in manual up operation.
4. Manual Operation (Front RH Window)With the power window control SW (Front RH) pulled to the up side, current flowing from TERMINAL 4 of the power windowcontrol SW flows to TERMINAL 3 to TERMINAL 4 of the power window motor to TERMINAL 5 to TERMINAL 1 of the powerwindow control SW to TERMINAL 2 to TERMINAL PD of the master SW to TERMINAL E to GROUND and rotates the powerwindow motor (Front RH) in the up direction. Up operation continues only while the power window control SW is pulled to theup side. When the window descends, the current flowing to the motor flows in the opposite direction, from TERMINAL 4 toTERMINAL 5, and the motor rotates in reverse. When the window lock SW is pushed to the lock side, the ground circuit tothe passenger’s window becomes open. As a result, even if Open/Close operation of the passenger’s window is attempted,the current from TERMINAL E of the power window master SW is not grounded and the motor does not rotate, so thepassenger’s window can not be operated and window lock occurs.
5. Manual Operation (Rear LH, Rear RH Window)With the power window control SW (Rear LH, rear RH) pulled to the up side, current flowing from TERMINAL 4 of the powerwindow control SW flows to TERMINAL 3 to TERMINAL 5 of the power window motor to TERMINAL 4 to TERMINAL 1 of thepower window control SW to TERMINAL 2 to TERMINAL RLD, RRD of the master SW to TERMINAL E to GROUND androtates the power window motor (Rear LH, rear RH) in the up direction. Up operation continues only while the power windowcontrol SW is pulled to the up side. When the window descends, the current flowing to the motor flows in the oppositedirection, from TERMINAL 5 to TERMINAL 4, and the motor rotates in reverse. When the window lock SW is pushed to thelock side, the ground circuit to the passenger’s window becomes open. As a result, even if Open/Close operation of thepassenger’s window is attempted, the current from TERMINAL E of the power window master SW is not grounded and themotor does not rotate, so the passenger’s window can not be operated and window lock occurs.
D11 Power Window Master SWB–Ground : Approx. 12 volts with the ignition SW at ON position
DU–Ground : Approx. 12 volts with the ignition SW on and master SW (Front LH window) at Up positionDD–Ground : Approx. 12 volts with the ignition SW on and master SW (Front LH window)
at Down or Auto Down positionE–Ground : Always continuity
Window Lock SWOpen with window lock SW at Lock position
System Outline
Service Hints
2004 COROLLA (EWD533U)
117
: Parts Location
Code See Page Code See Page Code See Page
D11 36 P6 37 P9 37
J6 35 P7 37 P10 37
P5 37 P8 37 P11 37
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
ID 25 Floor Wire and Instrument Panel J/B (Lower Finish Panel)
IJ2 42 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA1 44 Rear Door LH Wire and Floor Wire (Left Center Pillar)
BB1 44 Rear Door RH Wire and Instrument Panel Wire (Right Center Pillar)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
B4 44 Front Door LH Wire
2004 COROLLA (EWD533U)
118
Door Lock Control
From Power Source System (See Page 48)
25ADOOR
IF4
IEIG
IH10
3
6 5
IJ212IJ27
B6A5
B5A8
A3B3
IC14IC15
4A20 4A17 4A21 4A18
4A22 4A19
A9 A8
B 3
B 4
IC16IJ21
1
A A A A
9
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
L–W L
L–W L
L–W L
L–W L
L–W L
W–B
W–B
W–B
W–B
W–B
(*1)(*2)
(*1)(*2)
J 7 J 6
D10
( B) ,
D11
( A)
D12
I11(A)
Lock
Unl
ock
Lock
Unl
ock
Doo
r Lo
ck C
ontr
ol S
W F
ront
LH
Doo
r Lo
ck C
ontr
ol S
W F
ront
RH
Integration Relay
JunctionConnector
JunctionConnector
GND L1 UL1
+B
2004 COROLLA (EWD533U)
119
9 10 8
M
1 4
IC111 IC110 IC13 IC18 IC19
A6 A19 A1
11
6 5 7 1
M
4
IJ2 IJ210 IJ23 IJ28 IJ29
4A1
4A34A2
A7 A5 A18
7 8
L–Y
W R G L–B
W–R
G L–Y
W R L G L–B
W–R
G L–Y
W R L G L–B
W–R R L
W–B
W–B
W–B
L
R
L
G
I11(A)
D 8 D 9
Unl
ock
Lock
Unl
ock
Lock
Det
ectio
n
Det
ectio
n
* 1 : w/ Power Window* 2 : w/o Power Window
Door Key Lock and Unlock SW Front LHDoor Lock Motor Front LHDoor Unlock Detection SW Front LH
Door Key Lock and Unlock SW Front RHDoor Lock Motor Front RHDoor Unlock Detection SW Front RH
Integration Relay
UL3 LSWD ACTD L2 UL2 LSWP
2004 COROLLA (EWD533U)
120
Door Lock Control
4A8 4A4 4A9 4A5 4A7
4A6 4A10
IK5 IK2 ID20 ID9
BB18 BB13 BA18 BA13
1
M
4 1
M
4
R L R L
R L
R L R L
L
R
L
I11(A)
D14 D13
3 2
Door Lock Motor Rear LHDoor Lock Motor Rear RH
Integration Relay
ACT– ACT+
2004 COROLLA (EWD533U)
121
D 4
1
R–W
13 A
ID1
R–W
D 6
1
ID14
R–B
D 7
1
ID15
R–Y
D 5
1
65
4A15
4A16
IJ8
U 1
2
IE
L–B
L–B
W–B
4
A
1
J 6
I11(A)
Doo
r C
ourt
esy
SW
Fro
nt L
H
Doo
r C
ourt
esy
SW
Fro
nt R
H
Doo
r C
ourt
esy
SW
Rea
r LH
Doo
r C
ourt
esy
SW
Rea
r R
H
Integration Relay
JunctionConnector
Unl
ock
War
ning
SW
PRCTYDCTY PCTY KSW
2004 COROLLA (EWD533U)
122
Door Lock Control
The current always flows to TERMINAL 1 of the integration relay through the DOOR fuse.
1. Manual Lock OperationWhen the door lock control SW or door key lock and unlock SW are operated to Lock position, a lock signal is input toTERMINAL (A) 9 or (A) 7 of the integration relay and causes the relay to function. The current flows from TERMINAL 1 of therelay to TERMINAL 2 to the door lock motors to TERMINALS (A) 1 and 3 of the relay to TERMINAL 9 to GROUND and thedoor lock motors locks the door.
2. Manual Unlock OperationWhen the door lock control SW or door key lock and unlock SW are operated to Unlock position, an unlock signal is input toTERMINAL (A) 8, (A) 6 or (A) 5 of the integration relay and causes the relay to function. The current flows from TERMINAL 1of the relay to TERMINALS (A) 1 and 3 to the door lock motors to TERMINAL 2 of the relay to TERMINAL 9 to GROUNDand the door lock motors unlocks the door.
3. Double Operation Unlock OperationWhen the door key lock and unlock SW LH is turned to the unlock side, only the driver’s door is unlocked. By turning thedoor key lock and unlock SW LH to the unlock side, a signal is input to TERMINAL (A) 6 of the relay, and if the signal is inputagain within 3 seconds by turning the SW to the unlock side again, current flows from TERMINAL 3 of the integration relay tothe door lock motors to TERMINAL 2 of the relay to TERMINAL 9 to GROUND, causing the door lock motors to operate andunlock the doors.
4. Ignition Key Reminder Operation∗ Operating door lock knob (Operation of door lock motors)
With the ignition key in the cylinder (Unlock warning SW on), when the door is opened and locked using door lock knob(Door lock motor), the door is locked once but each door is unlocked soon by the function of the relay. As a result, thecurrent flows from TERMINAL 1 of the integration relay to TERMINALS (A) 1 and 3 to the door lock motors toTERMINAL 2 of the relay to TERMINAL 9 to GROUND and unlocks all the doors.
∗ Operating door lock control SW or door key lock and unlock SWWith the ignition key in the cylinder (Unlock warning SW on), when the door is opened and locked using door lockcontrol SW or key SW, the door is locked once but each door is unlocked by the function of SW contained in motors,and the signal is input to TERMINAL (A) 19 of the relay. According to this input signal, the current flows from TERMINAL1 of the relay to TERMINALS (A) 1 and 3 to the door lock motors to TERMINAL 2 of the relay to TERMINAL 9 toGROUND and unlocks all the doors.
∗ In case of key less lockWith the ignition the key in the cylinder (Unlock warning SW on), when the unlock function is disturbed, for examplepushing the door lock knob etc., the door holds on lock condition. After closing the door after, door courtesy SW inputsthe signal into TERMINAL 5 or 6 or (A) 13 of the integration relay. By this input signal, the relay works and current flowsfrom TERMINAL 1 of the relay to TERMINALS (A) 1 and 3 to the door lock motors to TERMINAL 2 of the relay toTERMINAL 9 to GROUND and unlocks all the doors.
System Outline
2004 COROLLA (EWD533U)
123
I11 (A) Integration Relay9–Ground : Always continuity5–Ground : Continuity with the driver’s door open1–Ground : Always approx. 12 volts2–Ground : Approx. 12 volts 0.2 seconds with following operation
∗ Door lock control SW locked∗ Locking the driver’s, front passenger’s door cylinder with the key
(A) 9–Ground : Continuity with the door lock control SW locked(A)13–Ground : Continuity with the front passenger’s door open(A)19–Ground : Continuity with the driver’s door lock knob unlocked(A) 8–Ground : Continuity with the door lock control SW unlocked(A) 5–Ground : Continuity with the front passenger’s door lock cylinder unlock with the key(A) 6–Ground : Continuity with the driver’s door lock cylinder unlocked with the key(A) 7–Ground : Continuity with the driver’s, front passenger’s door lock cylinder locked with the key(A) 1 or 3–Ground : Approx. 12 volts 0.2 seconds with following operation
∗ Door lock control SW unlocked∗ Door lock control SW locked with the ignition key in cylinder and the driver’s door open(Ignition key reminder function)∗ Door lock knob locked with the ignition key in cylinder and the driver’s door open(Ignition key reminder function)∗ Unlocking the driver’s, front passenger’s door cylinder with the key
D4, D5, D6, D7 Door Courtesy SW Front LH, RH, Rear LH, RH1–Ground : Closed with the door open
U1 Unlock Warning SW1–2 : Closed with the ignition key in cylinder
: Parts Location
Code See Page Code See Page Code See Page
D4 36 D9 36 D14 36
D5 36 D10 B 36 I11 A 35
D6 36 D11 A 36 J6 35
D7 36 D12 36 J7 35
D8 36 D13 36 U1 35
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
ID 25 Floor Wire and Instrument Panel J/B (Lower Finish Panel)
IF
IH 25Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IJInstrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IK 24
4A 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IC1 40 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IJ2 42 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA1 44 Rear Door LH Wire and Floor Wire (Left Center Pillar)
BB1 44 Rear Door RH Wire and Instrument Panel Wire (Right Center Pillar)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
Service Hints
2004 COROLLA (EWD533U)
124
Door Lock Control
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
B3 44 Front Door RH Wire B4 44 Front Door LH Wire
2004 COROLLA (EWD533U)
125
Memo
2004 COROLLA (EWD533U)
126
Wireless Door Lock Control
From Power Source System (See Page 48)
25ADOOR
IF4
IEIG
IH10
3
6 5
IJ212IJ27
B6A5
B5A8
A3B3
IC14IC15
4A20 4A17 4A21 4A18
4A22 4A19
A9 A8
B 3
B 4
IC16IJ21
1
A A A A
9
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
L–W L
L–W L
L–W L
L–W L
L–W L
W–B
W–B
W–B
W–B
W–B
(*1)(*2)
(*1)(*2)
J 7 J 6
D10
( B) ,
D11
( A)
D12
I11(A)
Lock
Unl
ock
Lock
Unl
ock
Doo
r Lo
ck C
ontr
ol S
W F
ront
LH
Doo
r Lo
ck C
ontr
ol S
W F
ront
RH
Integration Relay
JunctionConnector
JunctionConnector
GND L1 UL1
+B
2004 COROLLA (EWD533U)
127
9 10 8
M
1 4
IC111 IC110 IC13 IC18 IC19
A6 A19 A1
11
6 5 7 1
M
4
IJ2 IJ210 IJ23 IJ28 IJ29
4A1
4A34A2
A7 A5 A18
7 8
L–Y
W R G L–B
W–R
G L–Y
W R L G L–B
W–R
G L–Y
W R L G L–B
W–R R L
W–B
W–B
W–B
L
R
L
G
I11(A)
D 8 D 9
Unl
ock
Lock
Unl
ock
Lock
Det
ectio
n
Det
ectio
n
* 1 : w/ Power Window* 2 : w/o Power Window
Door Key Lock and Unlock SW Front LHDoor Lock Motor Front LHDoor Unlock Detection SW Front LH
Door Key Lock and Unlock SW Front RHDoor Lock Motor Front RHDoor Unlock Detection SW Front RH
Integration Relay
UL3 LSWD ACTD L2 UL2 LSWP
2004 COROLLA (EWD533U)
128
Wireless Door Lock Control
4A8 4A4 4A9 4A5 4A7
4A6 4A10
IK5 IK2 ID20 ID9
BB18 BB13 BA18 BA13
1
M
4 1
M
4
D 4
1
R–W
13 A
ID1
R–W
D 6
1
ID14
R–B
D 7
1
ID15
R–Y
D 5
1
65
R L R L
R L
R L R L
L
R
L
D14 D13
3 2
I11(A)
Doo
r C
ourt
esy
SW
Fro
nt L
H
Doo
r C
ourt
esy
SW
Fro
nt R
H
Doo
r C
ourt
esy
SW
Rea
r LH
Doo
r C
ourt
esy
SW
Rea
r R
H
Door Lock Motor Rear LHDoor Lock Motor Rear RH
Integration Relay
PCTYDCTY PRCTYACT+ACT–
2004 COROLLA (EWD533U)
129
4A15
4A16
IJ8
U 1
2
IE
ID8 10 ID
BH
AA
BA
13 ID
IC7
15ADOME
From Power Source System (See Page 48)
1
L–B
L–R
L–B
G–Y
L–Y
L–W
W–B
W–B
W–B
4 7 8
1
A
2 3 5
GND
KSW RDA PRG
1
2
1
RDA PRG +BD 3
J 6
J 8(A), J 9(B)
I11(A)
Y–B
Y–B
3 3C
3C1
T 2
8
A25
EHW
A10
18 IA5
1
1 5
2 3
1
HORNRelay
1 1
10AHORN
1
G–Y B
G–Y
G–Y
B–W
B–W
13 4A
4A11
A11R
3C6
R
3C5
7 6
4 IA2
1
2 5
1 3
1
HEADRelay
1 1
40AHEADMAIN
1
R–Y
R–B
R
R
D 2
R–Y
2
1
2
1
DaytimeRunningLight Relay
Door Control Receiver
Integration Relay
JunctionConnector
Junction Connector
Tur
n S
igna
l Fla
sher
Rel
ay
Unl
ock
War
ning
SW
HAZ HORN HRLY
H H–LP
2004 COROLLA (EWD533U)
130
Wireless Door Lock Control
Door lock control (Lock and unlock) and panic control (TVIP alarm and flash) is performed by remote control, without theignition key inserted in the door key cylinder, using low–power electrical waves emitted by a transmitter.
1. Wireless Door Lock or Unlock Normal OperationWith the ignition key not inserted into the ignition key cylinder (Unlock warning SW off) and all the doors completely closed,when the lock or unlock button (Transmitter) is pushed, the door control receiver receives the electrical waves from thetransmitter, and sends a signal to the integration relay causing it to operate.As a result, the integration relay judges whether the door is locked or unlocked based on the signal from the door lock motorand door unlock detection SW, and sends a signal to switch the condition from lock to unlock or vice versa, causing the doorlock motor to operate.
2. Visual Confirmation of Lock or UnlockIf all doors indicate that they are locked after the lock command, parking lights and taillights will flash once. If any doorindicates that it is open after the unlock command, parking lights and taillights will flash twice.
3. Wireless Door Unlock OperationPushing the unlock button (Transmitter) once, driver’s door is unlocked. Furthermore, pushing the button again within 3seconds, the other doors are unlocked.
4. Automatic Lock OperationWith the ignition key not inserted into the ignition key cylinder (Unlock warning SW off) and all the doors completely closed,after pushing the button (Transmitter) to unlock all the doors, if a door is not opened within 30 seconds, all the doors will beautomatically relocked.
5. Wireless Control Stop FunctionIf a door is open (Door courtesy SW on), a signal is input from the door courtesy SW to the integration relay stoppingwireless door lock or unlock.If the ignition key is in the ignition key cylinder (Unlock warning SW on), the unlock warning SW inputs a signal to theintegration relay stopping wireless door lock or unlock.
6. Repeat FunctionIn case an appropriate lock detection signal is not received after outputting a lock signal when pushing the lock button(Transmitter), 1 seconds later, the integration relay output the lock signal again.
7. Remote Panic OperationPanic will function when doors are locked or unlocked, open or closed. When the panic button (Transmitter) is pushed once,theft alarm sounds and headlights and taillights flash. Then, the panic or the unlock button (Transmitter) is pushed oncemore, sounding and flashing will stop. Panic will not function when ignition key is in ignition key cylinder.
System Outline
2004 COROLLA (EWD533U)
131
I11 (A) Integration Relay9–Ground : Always continuity5–Ground : Continuity with the driver’s door open1–Ground : Always approx. 12 volts2–Ground : Approx. 12 volts 0.2 seconds with following operation
∗ Door lock control SW locked∗ Locking the driver’s, front passenger’s door cylinder with the key
(A) 9–Ground : Continuity with the door lock control SW locked(A)13–Ground : Continuity with the front passenger’s door open(A)19–Ground : Continuity with the driver’s door lock knob unlocked(A) 8–Ground : Continuity with the door lock control SW unlocked(A) 5–Ground : Continuity with the front passenger’s door lock cylinder unlock with the key(A) 6–Ground : Continuity with the driver’s door lock cylinder unlocked with the key(A) 7–Ground : Continuity with the driver’s, front passenger’s door lock cylinder locked with the key(A) 1 or 3–Ground : Approx. 12 volts 0.2 seconds with following operation
∗ Door lock control SW unlocked∗ Door lock control SW locked with the ignition key in cylinder and the driver’s door open(Ignition key reminder function)∗ Door lock knob locked with the ignition key in cylinder and the driver’s door open(Ignition key reminder function)∗ Unlocking the driver’s, front passenger’s door cylinder with the key
D4, D5, D6, D7 Door Courtesy SW Front LH, RH, Rear LH, RH1–Ground : Closed with the door open
U1 Unlock Warning SW1–2 : Closed with the ignition key in cylinder
D3 Door Control Receiver5–Ground : Always approx. 12 volts1–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
D2 34 D9 36 J6 35
D3 36 D10 B 36 J7 35
D4 36 D11 A 36 J8 A 36
D5 36 D12 36 J9 B 36
D6 36 D13 36 T2 35
D7 36 D14 36 U1 35
D8 36 I11 A 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
ID 25 Floor Wire and Instrument Panel J/B (Lower Finish Panel)
IF
IH 25Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IJInstrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IK 24
3C 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4A 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
Service Hints
2004 COROLLA (EWD533U)
132
Wireless Door Lock Control
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA240 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA540 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IC1 40 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IJ2 42 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA1 44 Rear Door LH Wire and Floor Wire (Left Center Pillar)
BB1 44 Rear Door RH Wire and Instrument Panel Wire (Right Center Pillar)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
BH 44 Under the Left Quarter Pillar
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
B3 44 Front Door RH Wire B4 44 Front Door LH Wire
2004 COROLLA (EWD533U)
133
Memo
2004 COROLLA (EWD533U)
134
TVIP System
10AECU–IG
From Power Source System (See Page 48)
IF9
10AECU–B
IH1
I 7
I 25 2
3 1
IL11
IM1 IF4
II17
4 2
3 1
1A1
30AMAIN
1
IA42
IM3
15AAM2
IM6
5
4
AM2 IG2
ST2
IA23 II212
I 7
2
1
IA510 II211
I 9
IE
BB
–R B
W–B
B
W–B
B
R R
R
RR
B–W R–B
B–W R–B
BB
B B B
B
B–W
R
B–W
R–B
B–R
1
8 1
B
P
N
9
6
A 2
J 2
J 2
S 8
S 3
I10
C 8
G 3
J 6
FL MAIN2. 0L
Battery
B–R
( M/T
)
( A/T
)
( M/T
)
( A/T
)( A
/T)
( A/T
)( A
/T)
( M/T
)( M
/T)
( A/T
)
B–R
STRelay
A
A
G
A
G
TRIG S+B
1
2
IH10
A A
W–B
W–B
W–B
W–B
W–B
W–BA
W–B
W–B
W–B
Par
k/N
eutr
al P
ositi
on S
W
Clu
tch
Sta
rt S
W
Glass Breakage Sensor ECU
Ignition SW
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
JunctionConnector
Starter
Sta
rter
Cut
Rel
ay
2004 COROLLA (EWD533U)
135
I 8 I 8
2
3A19
3A11
IG
1
2
12
KSW CTY
19
DSWD
40
R
U 1
R–W
DSWL
35
1
L 4
ID211
R–W
R–W L–
B
A
A
R–W
J10
HORN
G–Y
5
W–B
T 3
R–W
W–BL
B–R
R–B
B–W
B–W
R–B
B–R
3 6
3 4 1
10 2 21 11 29 25
4 5
W
G 3
IG +B1 SRLY IOUT E IND
MIC GMIC
IOUT GND
W–B
L
W–B
W–B
R–W
W–B
( Shi
elde
d)
S 4
J 7
A
W–B
L–B
R
G–Y
Sec
urity
W–B
W–B
W–B
A W–BAW–B
W–B
W–B
Glass BreakageSensor ECU
Junction Connector
Junc
tion
Con
nect
orLu
ggag
e C
ompa
rtm
ent
Ligh
t S
W
Sec
urity
Indi
cato
r
TVIP ECU
Unl
ock
War
ning
SW
R–W
Microphone
2004 COROLLA (EWD533U)
136
TVIP System
Unl
ock
Lock
7
9 10
Unl
ock
Lock
8
6 5
IC16
D 8
D 9
I 1
8 7
4A1
4A2
IC111 IC110 IC13 IJ211 IJ210 IJ23
W–B
G L–Y
W G L–B
W–R
W–R
L–B
GWL–Y
GG L–
Y
W L–B
W–R
G
Det
ectio
n
Det
ectio
n
16 17 37 18 38
UL3 LSWD UL2 LSWP
IJ21
W–B
W–B
T 2
8
3C2
3C3
Y–B
8
HAZD
Y–B
EH
W
G–Y
RR
G–Y
R–W
W–B
T 3
L2
R
6
HEAD
R
5 3C
6 3C
W–B
R–W
W
IRSG
28
W
2
1
15ADOME
From Power Source System (See Page 48)
1
L–W
IE4
IC7
1
2
I13
4
7
Off
On
Doo
r
IG
3
IE
6
3
9
DMLP
R–W
R–W
R–B
L–W
4B21
4B19
W–B W–B
W–B
R–Y
R 7
R
Doo
r K
ey L
ock
and
Unl
ock
SW
Fro
nt L
HD
oor
Unl
ock
Det
ectio
n S
W F
ront
LH
Doo
r K
ey L
ock
and
Unl
ock
SW
Fro
nt R
HD
oor
Unl
ock
Det
ectio
n S
W F
ront
RH
Inte
rior
Ligh
t
Rhe
osta
t
TVIP ECU
Turn
Sig
nal F
lash
er R
elay
2004 COROLLA (EWD533U)
137
R–W
IL3 ID1 IK4
1
R–W
D 4
R
D 6
1
ID14
R–B
D 7
1
ID15
R–Y
D 5
1
A13
R–W
65
4A12
4A13
IA518
1
2 3
1 5
1
1 1
1
10AHORN
From Power Source System (See Page 48)
1
G–Y
R
G–Y
G–Y B
B–W
B–W
HORNRelay
H 6
I11(A)
6
H–LP
4 IA2
1
2 5
1 3
1
HEADRelay
1 1
40AHEADMAIN
1
R–Y
R–B
R
R
D 2
R–Y
R7
1 1
2 2
R–W
W
26 A
Day
time
Run
ning
Ligh
t R
elay
Doo
r C
ourt
esy
SW
Fro
nt L
H
Doo
r C
ourt
esy
SW
Fro
nt R
H
Doo
r C
ourt
esy
SW
Rea
r LH
Doo
r C
ourt
esy
SW
Rea
r R
H
Hor
n
Integration Relay
PRCTYDCTY PCTYTVSS
H
2004 COROLLA (EWD533U)
138
TVIP System
T3 TVIP ECU10–Ground : Approx. 12 volts with the ignition SW at ON position
The moon roof can be operated when the ignition SW is turned to ON position.
1. Slide Open OperationThe moon roof fully opens automatically by pressing the slide open button of the moon roof control SW once. If the moonroof control switch is pressed again when the moon roof is operating, the movement of the moon roof stops.The operation of slide open is not worked when the moon roof at tilt up position.
2. Slide Close OperationIf you keep pressing the slide close button of the moon roof control SW when the moon roof is open, the moon roof closeshalf and stops the operation once. If you keep pressing the slide close once again, the moon roof fully closes.
3. Tilt Up OperationIf you press the tilt up button of the moon roof control SW, the moon roof is tilted up. However, the moon roof is not tilted upwhen it is open
4. Tilt Down OperationIf you press the tilt down button when the tilt up of the moon roof control SW is pressed, the moon roof is tilted down.
P/W Relay5–3 : Closed with the ignition SW at ON position
M2 Moon Roof Control Relay and SW2–Ground : Approx. 12 volts with the ignition SW at ON position8–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
J6 35 M2 37
J7 35 M3 37
: 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
B2 44 Roof Wire
System Outline
Service Hints
2004 COROLLA (EWD533U)
142
Electronically Controlled Transmission
1A1
30AMAIN
15AEFI
1 1
15A
AM
2
IM3
IM6
IA42
5 6AM2 IG2
ST2
1
3 2
5 1
1
1 1
4B1
4B3
EA13 IA21 2
1AH AH
BF AB AB
ED
II16EA19
BB
–RB
–RB
B
W–B
B–W
R–W WBR Y
BR
BB
R–W P
R–Y
L–W
R–W
B–W B–O
B
BR
2 2
1 1
E 2
J 2(
A) ,
J 3
( B)
J 2(
A)
I10
Battery
EFIRelay
SLT+ SLT– S1 SL
R–W
R–W
B–W
FL MAIN2. 0L
EA110
IK
8
IL
5
B–W
S2
IC
12
B–O
BR
Y
L
E 1
1 4 3 2 6
Electronically Controlled Transmission Solenoid
Eng
ine
Coo
lant
Tem
p.
Sen
sor
Ignition SW
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
G W Y BGR
E2
A17 16 A 15 B B13
3 D A19A28 A18
D1
+B
E 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module
VC
SLT+ SLT– S1 SL
THWBATT
2004 COROLLA (EWD533U)
143
B–O
(*1)
( *1)
( *1)
AD AD
BB
II13
L
R–Y
LL
6 14
C14
J 2(
A) ,
J 3(
B)
BR
Y
L
3C11
3C13
IL1
IC5
15ASTOP
From Power Source System (See Page 48)
IC14
1
2
R–B
R–W
B–O
R–B
W–B
IG
3A11
B–O
3A17
4
2
II210
BR
EB
W–B
W–B
AA
BR
AA
W–BLG
–B
LL 2L RL
8 4 2
3
II12 II15 13 II2
R–B
LG–B
G–W
LGLG
LG–B
G–W
LG
G–W
IK9
BR
IK10
A A
S 9
A 2
R–W
J 7
A10
J 4(
A)
R–B
R–W
RB
31
2
AC AC
BB
LGV–W
W–B
W–B
W–B
W–B
EC
P–B
P–B
4 4C
4C3
D 1
13
J 4(
A) ,
J 5(
B)
TC
LG
V–W
* 1 : w/ Cruise Control
T 1
A/T
Shi
ft Le
ver
Pos
ition
SW
O/D
Mai
n S
W
Cruise Control ECU
Data LinkConnector 3
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
Junc
tion
Con
nect
or
Sto
p Li
ght
SW
Thro
ttle
Pos
ition
Sen
sor
ODECT
E 3(A), E 4(B), E 5(C), E 6(D)
B14 C18
E1EC
21 A C19
C29 B28 B7
C8 C9 C11
E02E01E03
7 A A6B5
20 D
C7C17
Engine Control Module
TC
ODLPSPDODMSOD1S2
R2LSTPVTA
2004 COROLLA (EWD533U)
144
Electronically Controlled Transmission
10AGAUGE
From Power Source System (See Page 48)
IG2
3B16
3B22
9 4C
4C8
3B20
II214
AB
BC
I 2
AC
BC
EB
B–O
R–W
R–W
R–W
R–W
LG V–W
W–G
W–G
W–G
W–G
BR
BR
R–W
R–W
B–O
R–W
2
3
17
1
32 4
3 10 9
V 1
S 1
O/D
OF
F
C 9
( *2)
J 4(A), J 5(B)
AB(*
2)( *
2)
J 2(A), J 3(B)
( *2)
( *2)
II24IA614
* 2 : w/o ABS
Spe
edom
eter
LG
V–W
V–W
Skid Control ECUwith Actuator
Combination Meter
JunctionConnector
JunctionConnector
Vehicle Speed Sensor(Combination Meter)
SP1
W–G
2004 COROLLA (EWD533U)
145
Previous automatic transaxle have selected each gear shift using mechanically controlled throttle hydraulic pressure,governor hydraulic pressure and lock–up hydraulic pressure. The electronically controlled transmission, however, controlsthe line pressure and lock–up pressure etc. electrically, through the solenoid valve. The engine control module controls eachsolenoid valve based on the input signals from each sensor, which makes smooth driving possible by shift selection for eachgear that 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 SPD 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, the current flows from TERMINAL S1 of the engine control module to TERMINAL 3 of the solenoid to GROUND, andfrom TERMINAL S2 of the engine control module to TERMINAL 6 of the electronically controlled transmission solenoid toGROUND, and continuity to the No.1 and No.2 solenoid causes the shift.For 2nd speed, the current flows from TERMINAL S1 of the engine control module to TERMINAL 3 of the solenoid toGROUND, and from TERMINAL S2 of the engine control module to TERMINAL 6 of the solenoid to GROUND, andcontinuity to solenoids 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 both No.1 and No.2 solenoid.
2. 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.
3. Overdrive Circuit∗ Overdrive on
When the engine is turned on from ignition off, the engine control module turns the O/D on. When the O/D main SW ispushed while the O/D is off, a signal is input into TERMINAL ODMS of the engine control module, and the O/D is turnedon by the engine control module. In this case, the engine control module controls the gear shift according to the vehicle’sdriving condition, using the O/D range. At this time, the O/D off indicator light is off.
∗ Overdrive offWhen the O/D main SW is pushed while the O/D is on, a signal is input into TERMINAL ODMS of the engine controlmodule, and the O/D is turned off. At this time, the current flows through the O/D off indicator light to TERMINAL ODLP ofthe engine control module. As a result, the O/D off indicator light turns on, and the engine control module controls the gearshift according to the vehicle’s driving condition, without using the O/D range.
E3 (A), E4 (B), E5 (C), E6 (D) Engine Control ModuleS1, S2–E1 : 9.0–14.0 volts with the ignition SW on and the solenoid on
0–1.5 volts with the ignition SW on and the solenoid offL–E1 : 7.5–14.0 volts with the ignition SW on and the shift lever at L position2–E1 : 7.5–14.0 volts with the ignition SW on and the shift lever at 2 positionR–E1 : 7.5–14.0 volts with the ignition SW on and the shift lever at R position
STP–E1 : 9.0–14.0 volts with the brake pedal depressedTHW–E2 : 0.2–1.0 volts with the engine coolant temp. 60°C (140°F) –120°C (248°F) and engine idlingVTA–E2 : 0.3–0.8 volts with the ignition SW on and the throttle valve fully closed
3.2–4.9 volts with the ignition SW on and the throttle valve fully openVC–E2 : 4.5–5.5 volts with the ignition SW on
ODMS–E1 : 9.0–14.0 volts with the ignition SW on0–3.0 volts with the ignition SW on and press continuously the O/D main SW
+B–E1 : 9.0–14.0 volts with the ignition SW onODLP–E1 : Approx. 12 volts with the ignition SW on and the O/D main SW turned off
A2 A/T Shift Lever Position SW3–2 : Closed with the shift lever in R position3–4 : Closed with the shift lever in 2 position3–8 : Closed with the shift lever in L position
System Outline
Service Hints
2004 COROLLA (EWD533U)
146
Electronically Controlled Transmission
: Parts Location
Code See Page Code See Page Code See Page
A2 32 E3 A 34 J4 A 35
A10 34 E4 B 34 J5 B 35
C9 34 E5 C 34 J7 35
C14 34 E6 D 34 S1 33
D1 34 I10 35 S9 35
E1 32 J2 A 35 T1 33
E2 32 J3 B 35 V1 33
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IG 25
IKInstrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3B 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C
( g )
4B30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EA1 38 Engine Wire and Engine Room Main Wire (Inside of the Engine Room R/B)
IA2
IA4 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA6
g ( )
II142 Engine Wire and Instrument Panel Wire (Blower Unit RH)
II242 Engine Wire and Instrument Panel Wire (Blower Unit RH)
: Ground Points
Code See Page Ground Points Location
EB38 Left Side of the Cylinder Head
EC38 Left Side of the Cylinder Head
ED 38 Front Left Suspension Tower
IG 40 Right Kick Panel
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I2 42 Instrument Panel Wire
2004 COROLLA (EWD533U)
147
Memo
2004 COROLLA (EWD533U)
148
Cruise Control
Spe
edom
eter
3B22
4C20
3B20
4C19
10AGAUGE
IG2
5 6AM2 IG2
ST2
4C7
4C8
1A1
30AMAIN
1
IA42
1M3
15AAM2
1M6
15ADOME
From Power Source System (See Page 48)
1
3B19
3B
16
CR
UIS
E
II214
B
B
3C19
3C20II14
IA55
2
1
IA514
3C17
IC7
IL4
3245
2
1 10 23
BB
–RB
–R
L–W
L–W
L–W
R–W B–O
R–W
R–W
R–W
LR
–W
R–W
L
L
V–W
V–W
G–R
B–W
L
G–R
V–W
L
R–W
J 4
C13
C 9
Battery
FL MAIN2. 0L
B
I10
IL5
IK8
B–W
( M/T
)
( M/T
)( M
/T)
( A/T
)
R–W
7
( A/T
)( A
/T)
( A/T
)
(A/T)
( M/T
)A 2
3
A/T ShiftLeverPosition SW
Com
bina
tion
Met
er
Cru
ise
Con
trol
Clu
tch
SW
Ignition SW
JunctionConnector
D
2
1
2004 COROLLA (EWD533U)
149
CRUISE
M
RES/ACC
SET/COAST
CANCEL
II13
AD
BB
10AECU–IG
From Power Source System (See Page 48)
IF9
3B5
3B6
15ASTOP
From Power Source System (See Page 48)
IC14
IL1
IL5
3C12
3C13
IA513IA54IA512
MC MO L
GND
CCS
ECC
IA53
4B14
4B12 4B214B13
IE
2
3 2
312
43
62
4 5 12 11 7 15 8 3 16
4 1
B14C18D16
4C3
4C2
101413
GND
L
G–R
V–W
G–Y
R–L
R–G
G–O
G–W
W–B
R–Y
W–B
W–B
G–W
G–W
W–B
W–B
P–B
P–B
LL
R–Y
L–W
R–W
B–W
B–W
L
G–O
R–GR–L
R–W
G–R
V–W
L
W–B
+B
C10 C 4
C14
D 1
E 4(B), E 5(C), E 6(D)
J 2(A), J 3(B)
S 9
( *1)
( *1)
( *1)
( *1)
13
TC
W–B
A
J 6
* 1 : A/T
Combination SW Cruise Control Actuator
Cruise Control ECU
Data LinkConnector 3
Engine Control Module
JunctionConnector
Junc
tion
Con
nect
or
Sto
p Li
ght S
W
OD1
IDL OD ECT TC
D PI SPD CCS MC MO L STP–
IDLO S2
2004 COROLLA (EWD533U)
150
Cruise Control
The current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.With the ignition SW turned to on, the current flows through the MAIN fuse to AM2 fuse to ignition SW (IG2) to TERMINAL 32of the combination meter and the current through the ECU–IG fuse flows to TERMINAL 2 of the cruise control ECU.When the ignition SW is on and the CRUISE SW is turned on, a signal is input from TERMINAL 2 of the cruise control SW toTERMINAL 1 of the cruise control ECU. As a result, the cruise control ECU functions and the current flows from the ECU–IGfuse to TERMINAL 2 of the cruise control ECU to TERMINAL 16 of the cruise control ECU to GROUND, and the cruisecontrol system is in a condition ready for operation.At the same time, the current flows through the MAIN fuse to AM2 fuse to ignition SW (IG2) to TERMINAL 32 of the cruiseindicator light to TERMINAL 23 to TERMINAL 5 of the cruise control ECU to TERMINAL 16 to GROUND, causing the cruiseindicator light to light up, indicating that cruise control is ready for operation.
1. Set OperationWhen the CRUISE 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 11 of the cruise control ECU, and the vehicle speed at thetime 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 12 of the cruise control ECU from the combination meter, and controls the cruise control actuator to maintainthe set speed.When the actual speed is lower than the set speed, the ECU causes the current to the cruise control actuator to flow fromTERMINAL 15 of the cruise control ECU to TERMINAL 1 of the cruise control actuator to TERMINAL 2 to TERMINAL 7 ofthe 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 driving speed is higher than the set speed, the currentto the cruise control actuator flows from TERMINAL 7 of the ECU to TERMINAL 2 of the cruise control actuator toTERMINAL 1 to TERMINAL 15 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 ACC 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 ACC 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. 40km/h, 25mph) after canceling the set speed by theCANCEL SW, pushing the RES SW will cause the vehicle to resume the 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 to positions except ”D” position (Park/Neutral position SW except ”D” position)(A/T), depressing the
clutch pedal (Cruise control clutch SW off)(M/T). ”Signal is not input to TERMINAL 4 of the ECU”∗ Depressing the brake pedal (Stop light SW on). ”Signal input to TERMINAL 3 of the ECU”∗ Pushing the CANCEL SW (CANCEL SW on). ”Signal input to TERMINAL 1 of the ECU”∗ Pushing the CRUISE SW off ”signal input to TERMINAL 1 of the ECU”.
7. Tap–Up Control FunctionWhen the difference between the actual vehicle speed and the set speed is less than 5 km/h (3 mph), the set speed can beincreased 1.6 km/h (1 mph) each time by operating the RES/ACC SW quickly within 0.6 seconds.
8. Tap–Down Control FunctionWhen the difference between the actual vehicle speed and the set speed is less than 5 km/h (3 mph), the set speed can belowered 1.6 km/h (1 mph) each time by operating the SET COAST SW quickly within 0.6 seconds.
System Outline
2004 COROLLA (EWD533U)
151
9. Auto Cancel FunctionA) If any of the following operating conditions occurs during cruise control operation, the set speed is erased, current flow tothe 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 CRUISE SW will turn on.∗ When current continues to flow to the motor inside the actuator in the throttle valve ”OPEN” direction.∗ The motor does not operate despite the motor drive signal being output.B) If any of the following operating conditions occurs during cruise control operation, the set speed is erased, current flow tothe magnetic clutch is stopped and the cruise control is released. (CRUISE SW turn off).When this occurs, the cancel state is cleared as the CRUISE SW will turn on again.∗ Over current to transistor driving the motor or the magnetic clutch.∗ Open circuit in the magnetic clutch.∗ Momentary interruption of vehicle speed signal.∗ Short circuit in the cruise control SW.C) If any of the following conditions occurs during cruise control operation, the set speed is erased and the cruise control isreleased. (The power to the 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 power to the cruise control system is momentarily cut off.
10. Automatic Transaxle Control Function (A/T)∗ In overdrive. If the vehicle speed becomes lower than the overdrive cut speed (Set speed minus approx. 4 km/h, 2.5 mph)
during cruise control operation, such as driving up a hill, the overdrive is released and the power is increased to prevent areduction in vehicle speed.
∗ After releasing the overdrive, if the vehicle speed becomes higher than the overdrive return speed (Set speed minusapprox. 2 km/h, 1.2 mph) and the ECU judges by the signals from the actuator’s potentiometer that the upward slope hasfinished, the overdrive is resumed after approximately 2 seconds.
∗ During cruise control driving, the cruise control operation signal is output from the cruise control ECU to the engine controlmodule. Upon receiving this signal, the engine control module changes the shift pattern to normal.To maintain smooth cruise control operation (on a downward slope etc.), the lock–up release of the transaxle when theidling point of the throttle position is ”ON” is forbidden.
C10 Combination SW2–3 : Continuity with the CRUISE SW on2–3 : Approx. 1540 Ω with the CANCEL SW on
Approx. 240 Ω with the RES/ACC SW onApprox. 630 Ω with the SET/COAST SW on
C14 Cruise Control ECU2–Ground : 12 volts with the ignition SW at ON position1–Ground : Approx. 1540 Ω with the CANCEL SW on in the control SW
Approx. 630 Ω with the SET/COAST SW on in the control SWApprox. 240 Ω with the RES/ACC SW on in the control SW
16–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
A2 32 D1 34 J3 B 35
C4 32 E4 B 34 J4 35
C9 34 E5 C 34 J6 35
C10 34 E6 D 34 S9 35
C13 34 I10 35
C14 34 J2 A 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
Service Hints
2004 COROLLA (EWD533U)
152
Cruise Control
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF25
IG25
IK Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3B28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA440 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA540 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
II142 Engine Wire and Instrument Panel Wire (Blower Unit RH)
II242 Engine Wire and Instrument Panel Wire (Blower Unit RH)
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
2004 COROLLA (EWD533U)
153
Memo
2004 COROLLA (EWD533U)
154
ABS
5 6AM2
ACC
IG2
ST2
15AAM2
IM3
IM6
IA42
1
30AMAIN
1A1
10AGAUGE
IG2
3B22
3B16
IK8
IL5
15ADOME
From Power Source System (See Page 48)
1
IC7
IL4
4C19
4C20
4
Bra
ke
AB
S
IA517
2
1
ED
4B21
4B18
IE
35
2
W–B
W–B
R–W
R–W
W–B
AJ 6
B 2
Spe
edom
eter
32 5
I10
BB
–RB
–RB
R–W
R–W
B–O
L–W
L–W
L–W
37 36
1
2
Battery
9
W–G
R
W–R
C 9
FLMAIN2. 0L
B–W
B–W
2
1
Bra
ke F
luid
Lev
elW
arni
ng S
W
Com
bina
tion
Met
er
Ignition SW
JunctionConnector
2004 COROLLA (EWD533U)
155
IA614 IA516 IA65
EA
E 1
1
2
1
2
1
2
1
2
10AECU–IG
IC13
15ASTOP
IC
1
2
30AABSNO. 1
From Power Source System (See Page 48)
1
40AABSNO. 2
114
3 16 2 24
IA611 IA612 IA64
4C3 3B2
4C1 3B1
12 13 7
1
IA515
D 1
D 2
10 11
R–B
R–W
R–WL–
R
P–BGR
GR
P–B
L–R
P–B
L–R
W–G R
W–R
W–B
W–B R G B W
B Y R W
BB Y W
W–B
W–G
B–W
R–W
G–W
R L
P 3
10 8 11 12
TS TC SIL
17 19 30 23 1 13 26 27 28 7 6 5 4
A 3
A 4
A19
A20
R
W–R
S 1
22
1 1
S 9
IB11 IB12 IB13 IB14
Skid Control ECUwith Actuator
AB
S S
peed
Sen
sor
Fro
nt L
H
AB
S S
peed
Sen
sor
Fro
nt R
H
AB
S S
peed
Sen
sor
Rea
r LH
AB
S S
peed
Sen
sor
Rea
r R
H
Data Link Connector 3
Daytime Running LightRelay
Par
king
Bra
ke S
W
StopLight SW
BC11 BD11
W W
B R
GND2 GND1 FL+ FL– FR+ FR– RL+ RL– RR+ RR–
+BSIG1 +BM TS TC
SP1 BRL WA
D/GSTP PKB
BRK PKB
BC12 BD12
2004 COROLLA (EWD533U)
156
ABS
ABS is a brake system designed to improve the operating ability and securing the stability of the vehicle by preventing thelock–up of the vehicle by controlling the wheel cylinder pressure of all the four wheels at the time of sudden braking.
1. Input Signals(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+, and RR+ of the skid control ECU andactuator.
(2) Stop light SW signalA signal is input to TERMINAL STP of the skid control ECU with actuator when brake pedal is depressed.
2. System OperationWhen the wheels are locked–up, the solenoid inside the actuator is controlled by the signal from the skid control ECU withactuator, and the brake fluid in the wheel cylinder will flow through the reservoir and reduce the hydraulic pressure.While the ABS is in operation, as the skid control ECU with actuator always outputs the operation signal to the pump insidethe actuator, and the brake fluid stored inside the reservoir will be sucked up by the pump inside the actuator and returned tothe master cylinder.When the hydraulic pressure of the wheel cylinder is decompressed or increased until the necessary hydraulic pressure, thesolenoid inside the actuator is controlled by the control signal from the skid control ECU with actuator and as a result,hydraulic pressure of the wheel cylinder will be closed at both the master cylinder and reservoir sides routes, and thehydraulic pressure of the wheel cylinder will be in the hold condition.If increase of the hydraulic pressure volume of the wheel cylinder becomes necessary, the control signals from the skidcontrol ECU with actuator control the solenoid inside the actuator, to resume to the normal condition. Thus the brake fluid ofthe master cylinder will be sent to the wheel cylinder and will increase the hydraulic pressure of the wheel cylinder. At thistime, in the case that the brake fluid is left in the reservoir, it will be sucked up by the pump inside the actuator and will besent to the wheel cylinder.
3B 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA4
IA5 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA6
g ( )
IB1 40 Engine Room Main Wire and Floor Wire (Cowl Side Panel LH)
BC1 44 Skid Control Sensor Wire LH and Floor Wire (Quarter Wheel House LH)
BD1 44 Skid Control Sensor Wire RH and Floor Wire (Quarter Wheel House RH)
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
ED 38 Front Left Suspension Tower
IE 40 Behind the Combination Meter
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E1 38 Engine Room Main Wire
2004 COROLLA (EWD533U)
158
Memo
2004 COROLLA (EWD533U)
159
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. This vehicle has power tilt and powertelescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.However, it is not possible to make a record of the memory contents. So when the work is finished, it will be necessaryto explain this fact tot the customer, and ask the customer to adjust the features and reset the memory. To avoid erasingthe memory in each memory 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, side airbag assembly, seat belt pretensioner,airbag sensor assembly, front airbag sensor assembly or side 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, side airbag assembly, seat belt pretensioner, airbag sensor assembly, front airbag sensor assembly and sideairbag 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, side airbag assembly, seat beltpretensioner, airbag sensor assembly, front airbag sensor assembly or side airbag sensor assembly in order to reuse it.
If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensorassembly, front airbag sensor assembly or side airbag sensor assembly has been dropped, or if there are cracks, dentsor other defects in the case, bracket or connector, 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.
2004 COROLLA (EWD533U)
160
SRS
5 6AM2 IG2
ST2
15AAM2
30AMAIN
IM6
1
IM3
1A1
IA42
A11A4A3
I 6
C8
IG13 IG11
IG
IG12IG14
3A153A14
3A11
1
1
1
2543423
A
LBE+LSP–LSP+
G–Y
L–W
B–W
GR–B
G–W
G–YBB
L–W
W–B
W–B
W–B
B
G–YB
L–W
BB
–RB
–RB
B–W
RBE+
2
I10
B 6
B 7
A12(A), A13(B), A14(C)
W–B
W–B
J 7
FL MAIN2. 0L
Battery
Airbag Sensor Assembly
Buckle SW LHSeat Position Sensor
Buckle SW RHOccupantDetection Sensor
Ignition SW
JunctionConnector
VS GND
Seat PositionSensor
Buc
kle
SW
Buc
kle
SW
Occ
upan
tD
etec
tion
Sen
sor
2004 COROLLA (EWD533U)
161
A6 A5 C1 C2
A2 A1 C5 C6
21 21
A12 A9 A10 A7
B14 B13 B16 B17
C7 C10 C9 C12
B10 B11 B8 B7
1 2 1 2 1 2 3 4 1 2 3 4
1 2 4 3 1 2 3 4
P2–P2+P–P+D2–D2+D–D+PR–PR+PL–PL+
G–Y
L–W
B–W
G–Y
L–W
B–W
Y–P
Y–G
R
Y–G
Y–R
Y–GY–VYY–BYY–BYY–B
Y–R
Y–G
Y–R
Y–G
GR
–L
L–W
LG–B
P–L GR
L–Y
LG P
VUPRFSRSSR–ESRVUPLFSLSSL–ESLSFR–SFR+SFL–SFL+
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
( *1)
S 6 S 7S10 S11
A12(A), A13(B), A14(C)
P12 P13 A16 A15
Airbag Sensor Assembly
Airbag Squib(Front Passenger Airbag Assembly)
Airbag Squib(Steering Wheel Pad)
Pretensioner LH Pretensioner RH
Side Airbag Sensor LH Side Airbag Sensor RHSide AirbagSquib LH
Side AirbagSquib RH
VUPRFSRSSR–ESRVUPLFSLSSL–ESL
* 1 : w/ Side Airbag
D+ D– D2+ D2– P+ P– P2+ P2–
2004 COROLLA (EWD533U)
162
SRS
G–Y
L–W
B–W
A12(A), A13(B), A14(C)
IA13
B15
IA14 IA11 IA12
B26 B9 B20
2 1 2 1
A 5 A 6
W–R BR
B–W
BR
–W
W–R BR
B–W
BR
–W
+SL –SL +SR –SR
+SL +SR–SL –SR
B5
IL5
II8
B28 B27 B23 B19 B12 B3
IH10 IF4 IJ6 IJ4 IJ5 IJ1
II10 II3 II7 II1 II2 II5
IG
4C5 3B4 4C15
4C3 3B2 4C13
IK8
4C14 4B18
4B21
IE
10AGAUGE
From Power Source System (See Page 48)
IG2
15ADOME
1
39 2
32 12 11 4 5
A
14 13 7 11
AA
W–B
B–Y
W–B
W–B
B–Y
L–R
P–BY
W–B
W–B
Y
W–B
W–B
P–B
L–R
B–Y
P–B
L–R
B–Y
B–O
B–O
B–W
L–W
G–Y
3B22
IC7
4C20
IL4
4C19
3B16
L–W
L–W
L–W
R–W
R–W
E2 E1 GSW2 TC SIL LA
IG2
D 1
J 6J 7
C 9
E 6
TC SIL A/B
SR
S
Airbag Sensor Assembly
Airbag Sensor Front LH Airbag Sensor Front RH
Combination Meter
Data Link Connector 3
Eng
ine
Con
trol
Mod
ule
JunctionConnectorJunction
Connector
F/PS
1
2
2004 COROLLA (EWD533U)
163
The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts.When the ignition SW is turned to ON, current from the MAIN fuse flows to AM2 fuse to ignition SW (IG2) to TERMINAL (B) 5of the airbag sensor assembly.If an accident occurs while driving, when the frontal impact exceeds a set level, the current from the TERMINAL (B) 5 of theairbag sensor assembly flows to TERMINALS (B) 14, (B) 16, (B) 10, (B) 8, (A) 2 and (C) 5 of the airbag sensor assembly tothe airbag squibs and the pretensioners to TERMINALS (B) 13, (B) 17, (B) 11, (B) 7, (A) 1 and (C) 6 of the airbag sensorassembly to TERMINAL (B) 20, (B) 27 or BODY GROUND to GROUND, so that the current flows to the front airbag squibsand the pretensioners, and causes them to operate.When the side impact also exceeds a set level, the current from the TERMINAL (B) 5 of the airbag sensor assembly flows toTERMINALS (A) 6 and (C) 1 of the airbag sensor assembly to the side airbag squibs to TERMINALS (A) 5 and (C) 2 of theairbag sensor assembly to TERMINAL (B) 20, (B) 27 or BODY GROUND to GROUND, causing side airbag squibs tooperate.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 the frontpassenger.Side airbags are instantaneously expanded to soften the shock of side to the driver and front passenger.The pretensioners make sure of the seat belt restrainability.
: Parts Location
Code See Page Code See Page Code See Page
A5 32 B6 34 J7 35
A6 32 B7 34 P12 37
A12 A 34 C9 34 P13 37
A13 B 34 D1 34 S6 35
A14 C 34 E6 34 S7 35
A15 34 I10 35 S10 37
A16 34 J6 35 S11 37
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF
IG
IH 25
IIInstrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IJInstrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3A28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3B28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4B30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA140 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IA440 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IG1 42 Instrument Panel Wire and Instrument Panel No.3 Wire (Front Side of the Parking Brake Lever)
System Outline
2004 COROLLA (EWD533U)
164
SRS
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
IG 40 Right Kick Panel
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I6 42 Instrument Panel No.3 Wire
2004 COROLLA (EWD533U)
165
Memo
2004 COROLLA (EWD533U)
166
Shift Lock
Shift LockSolenoid
10AECU–IG
IF9
3A11
3A16
3B5
7 3B
3C
3C10
13
IC
IL1
5
S 9
15ASTOP
From Power Source System (See Page 48)
IC14
IG
A
B–W
R–W
G–W
G–W
G–W
B–W
W–B
W–B
1 5 3
E IG STP
SLS+ SLS–
S 5J 7
1
2
JunctionConnector Shift Lock Control ECU
StopLight SW
2004 COROLLA (EWD533U)
167
When the ignition SW is turned to ON position, the current from the ECU–IG fuse flows to TERMINAL 5 of the shift lockcontrol ECU.
Shift Lock MechanismWith the ignition SW at ON position, when a signal that the brake pedal is depressed (Stop light SW on) and a signal that theshift lever is put in P position is input to the ECU, the ECU operates and the current flows from TERMINAL 5 of the ECU toTERMINAL SLS+ of the shift lock solenoid to TERMINAL SLS– to TERMINAL 1 of the ECU to GROUND. This causes theshift lock solenoid to turn on (Plate stopper disengages) and the shift lever can shift into position other than P.
S5 Shift Lock Control ECU5–Ground : Approx. 12 volts with the ignition SW at ON position1–Ground : Always continuity3–Ground : Approx. 12 volts with the brake pedal depressed
S9 Stop Light SW2–1 : Closed with the brake pedal depressed
: Parts Location
Code See Page Code See Page Code See Page
J7 35 S5 35 S9 35
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF 25Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3A
3B 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3C
( g )
: Ground Points
Code See Page Ground Points Location
IG 40 Right Kick Panel
System Outline
Service Hints
2004 COROLLA (EWD533U)
168
Light Reminder Buzzer and Key Reminder Buzzer
10AGAUGE
IG
15ATAIL
IH7
IL4
IC7
4C19
4C20
OFF
Tail
Head
Ligh
tC
ontr
ol S
W
15ADOME
From Power Source System (See Page 48)
1
IE
A
1
2
A
4B21
4B18
2 5
1 3
3 3
3 3
IL3
ID1
1
17 2 16
4 5 18
15
14
R–W
L–W
L–W
L–W
G
R–W
R–W
W–B
W–B
W–B
L–B
( *2)
3B16
3B22
2
R–W
G ( *4)
G–W ( *4)
G–W ( *3)
G–W
(*3)
G–B
(*3)
G–W
(*3)
G–W
(*3)
G
(*3)
C12
D 2
TAILRelay
Buzzer
U 1
D 4
J 6
C 9
* 1 : w/ Door Lock Control* 2 : w/o Door Lock Control* 3 : USA* 4 : Canada
2
1
4A15
4A14
L–B
(*1)
L–B
(*1)
I 4
13
10
Combination Meter
Combination SW
Day
time
Run
ning
Ligh
t R
elay
Door Courtesy SWFront LH
JunctionConnector
UnlockWarning SW
T
TAIL
2004 COROLLA (EWD533U)
169
The current is applied at all times to TERMINAL 5 of the combination meter through the DOME fuse.When the ignition SW is turned to ON position, the current flows to TERMINAL 4 of the combination meter through theGAUGE fuse. When the light control SW is turned to Tail or Head position, current is applied to TERMINAL 18 of thecombination meter through the TAIL fuse via the TAIL relay (USA) or the light control SW (Canada).
1. Light Reminder SystemWhen the light control SW is in Tail or Head position, the ignition SW turned to OFF from ON position, and the driver’s dooropened (Door courtesy SW on), the current flows to TERMINAL 4 of the combination meter stops. As a result, thecombination meter is activated and current flows from TERMINAL 5 of the combination meter to TERMINAL 2 to GROUND,the buzzer in the combination meter goes on to remind the light is lighting up.
2. Key Reminder SystemWhen the driver door is opened with the ignition SW off and ignition key remaining in the key cylinder (Unlock warning SWon), a signal is input from the unlock warning SW to TERMINAL 16 of the combination meter, and from the door courtesy SWfront LH to TERMINAL 17 of the combination meter. As a result, the buzzer in the combination meter goes on and warns thedriver that the key is remaining in the key cylinder.
C9 Combination Meter4–Ground : Approx. 12 volts with the ignition SW at ON position
18–Ground : Approx. 12 volts with the light control SW at Tail or Head position17–Ground : Continuity with the driver’s door open
2–Ground : Always continuity
D4 Door Courtesy SW Front LH1–Ground : Closed with the driver’s door open
U1 Unlock Warning SW2–1 : Closed with the ignition key in cylinder
: Parts Location
Code See Page Code See Page Code See Page
C9 34 D2 34 J6 35
C12 34 D4 36 U1 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
ID 25 Floor Wire and Instrument Panel J/B (Lower Finish Panel)
IG25
IH25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24
( )
3B 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4A
4B 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
4C
( )
: Ground Points
Code See Page Ground Points Location
IE 40 Behind the Combination Meter
System Outline
Service Hints
2004 COROLLA (EWD533U)
170
Light Reminder Buzzer and Key Reminder Buzzer
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I4 42 Instrument Panel Wire
2004 COROLLA (EWD533U)
171
Memo
2004 COROLLA (EWD533U)
172
Seat Belt Warning
SeatBelt
10AGAUGE
IG2
15ADOME
From Power Source System (See Page 48)
1
3B22 IC7
3B16 IL4
4C19
4C20
IG13 IG11
IG14
IG12
IG
A
3 3
1
1
1211
4 5
1
II25
C
C
EB
BR
BR
BR
W–B
W–B
W–BW
–B
W–B
L–W
G–Y
G–Y
L–W
W–B
R–W
L–W
L–W
L–W
R–W
R–W
W–B
B 7
B 6
J 7
J 3
C 9
1
2
3A15 3A14 3A11
Buc
kle
SW
LH
Buc
kle
SW
RH
Combination Meter
JunctionConnector
JunctionConnector
3B11
3
1
4B18
4B21
IE
A
BR
BR
26
PA
SS
EN
GE
R
R–W
L
JunctionConnector
J 6
F 7
Fron
t P
asse
nger
Sea
t Bel
tW
arni
ng L
ight
2 4
B
Occ
upan
t Det
ectio
n S
enso
r
Buc
kle
SW
Occ
upan
tD
etec
tion
Sen
sor
2004 COROLLA (EWD533U)
173
Current is always applied from the DOME fuse to TERMINAL 5 of the combination meter. When the ignition SW is turned toON position, the current from the GAUGE fuse flows to TERMINAL 4 of the combination meter and flows TERMINAL 1 of thefront passenger seat belt warning light.
Seat Belt Warning SystemWhen the ignition SW turned on, a signal is input to the combination meter. To determine whether the driver has fastened theseat belt, a signal is input from the buckle SW LH to TERMINAL 12 of the combination meter. When the seat belt is notfastened, the seat belt warning light in the combination meter blinks, and emits a warning sound.In addition, the front passenger is recognized by a sensor (Occupant detection sensor) is installed in the front passengerseat, and determines whether the seat belt is fastened. When not fastened, the signals from the occupant detection sensoris input to TERMINAL 11 of the combination meter, and the front passenger seat belt warning light blinks.
B6 Buckle SW LH3–1 : Open with the driver’s seat belt in use
C9 Combination Meter5–Ground : Always approx. 12 volts4–Ground : Approx. 12 volts with the ignition SW at ON position1–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
B6 34 F7 35 J7 35
B7 34 J3 35
C9 34 J6 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
B5 44 Floor Wire
Service Hints
2004 COROLLA (EWD533U)
176
Radio and Player
15ADOME
From Power Source System (See Page 48)
1
IC7
IL4
A4
A7 A2 A6 A1 A5
+B ANT+
GND FL+ FL– FR+ FR–
A8
1
L–W
B
BR
P V LG L
P( *
2)
V( *
2)
LG( *
2)
L(*2
)
LG ( *1) L
( *1)
L(*1
)
LG( *
1)
P( *
1)
V( *
1)
P V
IF
R 3(A), R 4(B)
A17
T 4 T 5
F 9F 8
* 1 : w/ Tweeter* 2 : w/o Tweeter
IC24 IC23 IJ14 IJ13
1 2
1 2 21
21
4C20
4C17
L–W
L–W
1
2
Antenna Amplifier
Front DoorSpeaker LH
Front DoorSpeaker RH
Radio and Player
Tweeter LH Tweeter RH
(*1)
( *1)
BE11 BE12 BF11 BF12
LG( *
1)
L(*1
)
L(*1
)
LG( *
1)
2004 COROLLA (EWD533U)
177
15ACIG
From Power Source System (See Page 48)
IF8
3A10
3A7
A3
B2 B6 B1 B3
ACC
RL+ RL– RR+ RR–
R 3(A), R 4(B)
GR
GR
B Y R WWRYB
R13 R14
ID12 ID16 ID11 ID15
1 12 2
Radio and Player
Rear Speaker LH Rear Speaker RH
2004 COROLLA (EWD533U)
178
Radio and Player
R3 (A) Radio and Player(A) 4–Ground : Always approx. 12 volts(A) 3–Ground : Approx. 12 volts with the ignition SW at ACC or ON position(A) 7–Ground : Always continuity
: Parts Location
Code See Page Code See Page Code See Page
A17 34 R3 A 35 R14 37
F8 36 R4 B 35 T4 37
F9 36 R13 37 T5 37
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF 25Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IL 24Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3A 28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
4C 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IC2 40 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
The current is applied at all times through the RDI FAN fuse to TERMINAL 5 of the FAN NO.1 relay.When the ignition SW is turned on, the current flows through the ECU–IG fuse to FAN NO.1 relay (Coil side) to TERMINAL 6of the engine control module. At the same time as this current flow, the current from ECU–IG fuse flows to the FAN NO.2relay (Coil side) to TERMINAL 3 of the pressure SW.
1. Low Speed OperationWhen the A/C system is operating, the FAN NO.1 Relay is turned on. As a result, the current flows from the RDI FAN fuse toFAN NO.1 relay (Point side) to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to TERMINAL 3 of the FAN NO.2 relayto TERMINAL 4 to TERMINAL 2 of the radiator fan resistor to TERMINAL 1 to GROUND, and the radiator fan motor rotatesat low speed.
2. High Speed OperationWhen the pressure SW is on or engine control module operated, the FAN NO.1 and NO.2 relay is turned on. As a result, thecurrent flows from the RDI FAN fuse to FAN NO.1 relay (Point side) to radiator fan motor to TERMINAL 3 of the FAN NO.2Relay to TERMINAL 5 to GROUND, and the radiator fan motor rotates at high speed.
Close above approx. 15.5 kgf/cm2 (220 psi, 1520 kpa)
: Parts Location
Code See Page Code See Page Code See Page
E6 34 R1 33
P2 33 R2 33
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA5 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
ED 38 Front Left Suspension Tower
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E4 38 Engine Room Main Wire
System Outline
Service Hints
2004 COROLLA (EWD533U)
188
Air Conditioning
B
L–W
OFFLO
B
B
L–W
B–W
R
B–W
B–W
W–B
W–B
3 3
W–B
3 3 3
10AGAUGE
IG2
3B12 3B13
3B183B22
40AHEATER
From Power Source System (See Page 48)
IM2
10AA/C
IM5
IC3 IF7
IG
IH11 IH12 IH16 IH15
W–B
L–W
B
R–W
W–B
R–W
B–W
B
R–W
HTR
Rel
ay
HI M2 M1
1 3
2 5
AA
A
R–W
L–W B
Blower Resistor
B 5
J 7
B 3
4 1 2
6
5
1
2
R–W
R–W
B–W
2
1
4
I 7
A
Blo
wer
Mot
or
Blower SW
JunctionConnector
B 4
B–W L–
B
R
W–B
1 3 2 4M
2004 COROLLA (EWD533U)
189
L–W
BR
YY
W–B
BR
BR
B–L
G–W Y
L–W
G–W
W–B
B–W Y–B
Y–B
B–W
1 1
Dua
l
1 1
EA14
C33 C31 C2
C32 A28A13
EA18
EA
IH13
II21
IH14
F
F
IA67
3A11
3A20
W–B
R–W
B
L–W
W–B
5
3 2
5 1
2 1
R–W
E2
E 3(A), E 5(B)
P 2
A 1
A/C
The
rmis
tor
M/G
CLT
Rel
ay
9 86 7 4 3
4
1
1
A/C
Mag
netic
Clu
tch
Engine Control Module
Pre
ssur
e S
W
M
FRS
RE
C
OnA/C
SW OffFRS
REC
Air InletControl SW
L–W
A/C SWA 8
Air Inlet Control SWDefroster Mode Detection SW
Air
Inle
t Con
trol
Ser
vo M
otor
A11
IG GNDFRS REC A/CAIND
Junc
tion
Con
nect
or
J 3
FACE
B/L
FOOT
F/D
DEF
Def
rost
er M
ode
Det
ectio
n S
W
2
B
PRS THR
ACMGACLD A/CS
BB
2004 COROLLA (EWD533U)
190
Air Conditioning
Current is applied at all times through the HEATER fuse to TERMINAL 5 of the HTR relay.When the ignition SW is turned on, the current flows through the GAUGE fuse to TERMINAL 2 of the HTR relay toTERMINAL 1 to TERMINAL 6 of the blower SW.
1. Heater Blower Motor Operation∗ Low speed operation
When the blower SW is moved to LO position, the current flows to TERMINAL 6 of the blower SW to TERMINAL 5 toGROUND, causing the HTR relay to turn on. This causes the current flows from the HEATER fuse to TERMINAL 5 ofthe HTR relay to TERMINAL 3 to the blower motor to the blower resistor to GROUND, rotating the blower motor at lowspeed.
∗ Medium speed operation (Operation at M1, M2)When the blower SW is moved to M1 position, the current flows to TERMINAL 6 of the blower SW to TERMINAL 5 toGROUND, causing the HTR relay to turn on. This causes the current flows from the HEATER fuse to TERMINAL 5 ofthe HTR relay to TERMINAL 3 to the blower motor to the blower resistor to TERMINAL 2 of the blower SW toTERMINAL 5 to GROUND. At this time, the blower resistance of the blower resistor is smaller than at low speed, so theblower motor rotates at medium low speed.When the blower SW is moved to M2 position, the current flows through the HTR relay to the blower motor to the blowerresistor to TERMINAL 1 of the blower SW to TERMINAL 5 to GROUND. At this time, resistance of the blower resistor issmaller than at M1 position, so the blower motor rotates at medium high speed.
∗ High speed operationWhen the blower SW is moved to HI position, the current flows to TERMINAL 6 of the blower SW to TERMINAL 5 toGROUND, causing the HTR relay to turn on.This causes the current flows from the HEATER fuse to TERMINAL 5 of the HTR relay to TERMINAL 3 to the blowermotor to TERMINAL 4 of the blower SW to TERMINAL 5 to GROUND, rotating the blower motor at high speed.
2. Air Conditioning OperationWhen the blower SW is set on, the current flows from the HTR fuse to the HTR relay (Point side) to the A/C fuse to theTERMINAL 2 of the A/C SW. If the A/C SW is turned on, at this time a signal is input into the engine control module. Thisactivates the engine control module and M/G CLT relay. So that current flows from the A/C fuse to M/G CLT relay (Point side)to A/C magnetic clutch. Causing the compressor to operate.
HTR Relay5–3 : Closed with the ignition SW at ON position and the blower SW on
P2 Pressure SW1–4 : Open with the refrigerant pressure at less than approx. 2.0 kgf/cm2 (28.4 psi, 196.1 kpa) or more than
approx. 32.0 kgf/cm2 (455 psi, 3138.1 kpa)
: Parts Location
Code See Page Code See Page Code See Page
A1 32 B3 34 E5 B 34
A8 34 B4 34 J3 35
A9 34 B5 34 J7 35
A11 34 E3 A 34 P2 33
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
System Outline
Service Hints
2004 COROLLA (EWD533U)
191
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
IF25
IG25
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
IM 24
( )
3A28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
3B28 Instrument Panel Wire and RH J/B (Right Side of the Instrument Panel Reinforcement)
: Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
EA1 38 Engine Wire and Engine Room Main Wire (Inside of the Engine Room R/B)
IA6 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)
IH1 42 Instrument Panel Wire and A/C Sub Wire (Left Upper Side of the Blower Unit)
II2 42 Engine Wire and Instrument Panel Wire (Blower Unit RH)
: Ground Points
Code See Page Ground Points Location
EA 38 Front Right Fender
IG 40 Right Kick Panel
: Splice Points
Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I7 42 Instrument Panel Wire
2004 COROLLA (EWD533U)
192
Heater
10AGAUGE
From Power Source System (See Page 48)
IG2
40AHEATER
IM2
3B22
3B12
1 3
2 5
4
3 3 3
3 3
R–W
B–W
R–W
OFFLOM1M2HI
IG
A AA
4
6
1 2
5
IH11 IH12 IH16 IH15
2
1
B 5
J 7
B 3
B–W
L–W
R
W–BB
L–W
W–B
W–B
W–B
B–W
B–W
L–W
W–B
Blower Resistor
HTRRelay
2
1
I 7
20 3A
11 3A
G–W
W–B
8
W–B
L–W
9
3B13
3B18
R–W
6 7
A
B
R–W
R–W
R–W
B–W
W–B
Blo
wer
Mot
or
Blower SW
JunctionConnector
12
5
M
FRS
RE
C
IG FRS RSC GND
FRS
REC
Air InletControl SW
Air Inlet Control SWA 8
Air
Inle
t C
ontr
olS
ervo
Mot
or
A11
B 4
M
1 3 2 4
B–W L–
B R
W–B
2004 COROLLA (EWD533U)
193
HTR Relay5–3 : Closed with the ignition SW at ON position and the blower SW on
: Parts Location
Code See Page Code See Page Code See Page
A8 34 B3 34 B5 34
A11 34 B4 34 J7 35
: Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
3 28 RH R/B (Right Side of the Instrument Panel Reinforcement)
: Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
C 2 Camshaft Timing Oil Control Valve (VVT) 90980–11162
C 3 Crankshaft Position Sensor 90980–10947
C 4 Cruise Control Actuator 90980–11150
C 5Cigarette Lighter
90980–10760C 5Power Outlet (Front)
90980–10760
C 6 Cigarette Lighter Illumination 90980–11148
C 7 Clock 90980–11950
C 8 Clutch Start SW 90980–10825
C 9 Combination Meter 90980–12169
C10 Combination SW 90980–12183
C11 Combination SW 90980–12008
C12 Combination SW 90980–12007
C13 Cruise Control Clutch SW 90980–10906
C14 Cruise Control ECU 90980–12094
D 1 Data Link Connector 3 90980–11665
D 2 Daytime Running Light Relay 90980–12034
D 3 Door Control Receiver 90980–11909
D 4 Door Courtesy SW Front LH
D 5 Door Courtesy SW Front RH90980–10871
D 6 Door Courtesy SW Rear LH90980–10871
D 7 Door Courtesy SW Rear RH
Door Key Lock and Unlock SW Front LH
D 8 Door Lock Motor Front LH
Door Unlock Detection SW Front LH90980–12226
Door Key Lock and Unlock SW Front RH90980–12226
D 9 Door Lock Motor Front RH
Door Unlock Detection SW Front RH
D10 Door Lock Control SW Front LH 90980–10797
D11Door Lock Control SW Front LH
90980–12122D11Power Window Master SW
90980–12122
D12 Door Lock Control SW Front RH 90980–10797
D13 Door Lock Motor Rear LH90980–12226
D14 Door Lock Motor Rear RH90980–12226
E 1Electronically Controlled TransmissionSolenoid 90980–10854
E 2 Engine Coolant Temp. Sensor 90980–10737
E 3 Engine Control Module 90980–12144
E 4 Engine Control Module 90980–12145
E 5 Engine Control Module 90980–12146
E 6 Engine Control Module 90980–12142
F 1 Front Fog Light LH90980–11156
F 2 Front Fog Light RH90980–11156
F 3Front Parking Light LH
F 3Front Turn Signal Light LH
90980–11020
F 4Front Parking Light RH
90980–11020
F 4Front Turn Signal Light RH
F 5 Front Washer Motor 90980–10981
F 6 Front Wiper Motor 90980–11599
F 7 Front Passenger Seat Belt Warning Light 90980–11296
F 8 Front Door Speaker LH90980–10935
F 9 Front Door Speaker RH90980–10935
F10Fuel Pump
90980–11077F10Fuel Sender
90980–11077
G 1 Generator 90980–11349
G 2 Generator 90980–09373
G 3 Glass Breakage Sensor ECU 90980–10799
H 1 Headlight LH (High) 90080–98039
H 2 Headlight LH (Low) 90080–98038
H 3 Headlight RH (High) 90080–98039
L
Code Part Name Part Number Code Part Name Part Number
2004 COROLLA (EWD533U)
211
H 4 Headlight RH (Low) 90080–98038
H 5 Heated Oxygen Sensor (Bank 1 Sensor 1) 90980–10869
H 6 Horn 90980–10619
H 7 Hazard SW 90980–10933
H 8 Heated Oxygen Sensor (Bank 1 Sensor 2) 90980–10794
H 9High Mounted Stop Light (Bulb Type) 90980–10860
H 9High Mounted Stop Light (LED Type) 90980–11367
I 1 Idle Air Control Valve 90980–11145
I 2 Ignition Coil and Igniter No.1
I 3 Ignition Coil and Igniter No.290980–11885
I 4 Ignition Coil and Igniter No.390980–11885
I 5 Ignition Coil and Igniter No.4
I 6 Injector No.1
I 7 Injector No.290980–11875
I 8 Injector No.390980–11875
I 9 Injector No.4
I10 Ignition SW 90980–11778
I11 Integration Relay 90980–12203
I12Inner Mirror
90980–11794I12Personal Light
90980–11794
I13 Interior Light 90980–10908
J 1 Junction Connector 90980–10803
J 2 Junction Connector90980–11915
J 3 Junction Connector90980–11915
J 4 Junction Connector90980–11661
J 5 Junction Connector90980–11661
J 6 Junction Connector 90980–11539
J 7 Junction Connector 90980–11686
J 8 Junction Connector90980–11661
J 9 Junction Connector90980–11661
J10 Junction Connector 90980–10803
K 1 Knock Sensor 90980–11875
L 1 License Plate Light LH
L 2 License Plate Light RH 90980–11148
L 3 Luggage Compartment Light
L 4 Luggage Compartment Light SW 90980–11097
M 1 Mass Air Flow Meter 90980–11317
M 2Moon Roof Control Relay and SW
90980–10799M 2Personal Light
90980–10799
M 3 Moon Roof Motor and Limit SW 90980–11011
N 1 Noise Filter (Ignition) 90980–10843
N 2 Noise Filter (Rear Window Defogger) 90980–10825
O 1 Oil Pressure SW 90980–11363
P 1 Power Steering Oil Pressure SW 90980–11428
P 2 Pressure SW 90980–10943
P 3 Parking Brake SW 90980–10871
P 4 Power Outlet (Rear) 90980–10760
P 5 Power Window Control SW Front RH
P 6 Power Window Control SW Rear LH 90980–10789
P 7 Power Window Control SW Rear RH
P 8 Power Window Motor Front LH
P 9 Power Window Motor Front RH90980–10797
P10 Power Window Motor Rear LH90980–10797
P11 Power Window Motor Rear RH
P12 Pretensioner LH90980–12253
P13 Pretensioner RH90980–12253
R 1 Radiator Fan Motor90980–10928
R 2 Radiator Fan Resistor90980–10928
R 3 Radio and Player 90980–10997
R 4 Radio and Player 90980–10996
R 5 Rear Window Defogger SW 90980–10789
R 6 Remote Control Mirror SW 90980–11657
R 7 Rheostat 90980–12217
R 9 Rear Combination Light LH 90980–10795
R10 Rear Combination Light LH 90980–11148
R11 Rear Combination Light RH 90980–10795
R12 Rear Combination Light RH 90980–11148
R13 Rear Speaker LH90980–11299
R14 Rear Speaker RH90980–11299
R15 Rear Window Defogger 90980–10914
R16 Rear Window Defogger 90980–10913
R17 Remote Control Mirror LH90980–10907
R18 Remote Control Mirror RH90980–10907
S 1 Skid Control ECU with Actuator 82824–12300
S 2 Starter 90980–09463
S 3 Starter 90980–11400
S 4 Security Indicator 90980–11013
S 5 Shift Lock Control ECU 90980–11909
S 6 Side Airbag Squib LH90980–11864
S 7 Side Airbag Squib RH90980–11864
S 8 Starter Cut Relay 82660–0C010
S 9 Stop Light SW 90980–11118
S10 Side Airbag Sensor LH90980–12225
S11 Side Airbag Sensor RH90980–12225
T 1 Throttle Position Sensor 90980–11261
T 2 Turn Signal Flasher Relay 90980–10799
T 3 TVIP ECU 90980–12169
T 4 Tweeter LH90980–10915
T 5 Tweeter RH90980–10915
U 1 Unlock Warning SW 90980–10860
V 1 Vehicle Speed Sensor (Combination Meter) 90980–11143
V 2 VSV (Canister Closed Valve) 90980–11162
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.
2004 COROLLA (EWD533U)212
V 3 VSV (EVAP) 90980–11156
V 4 Vapor Pressure Sensor 90980–11143
V 5 VSV (Vapor Pressure Sensor) 90980–11859
W 1 Washer Level Sensor 90980–11068
L
Code Part Name Part Number Code Part Name Part Number
2004 COROLLA (EWD533U)
213
M O
VE
RA
LL ELE
CT
RIC
AL W
IRIN
G D
IAG
RA
M
2004 CO
RO
LLA (E
WD
533U)
214
M
2004 CO
RO
LLA (E
WD
533U)
215
[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 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)
[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 wiring diagram 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 the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate them from other parts.
3C indicates thatit 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 page indicates that the wire harness is continuous.