(manual)+toyota+corolla+2004+wiring+manual(2)

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.

FOREWORDThis wiring diagram manual has been prepared to provideinformation on the electrical system of the 2004 COROLLA.

Applicable models: ZZE130 Series

For service specifications and repair procedures of the abovemodels other than those listed in this manual, refer to thefollowing 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 productinformation at the time of publication. However, specificationsand 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.

2004 COROLLA (EWD533U)1

2004 COROLLAELECTRICAL WIRING DIAGRAM

Section Code Page

INTRODUCTION A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

HOW TO USE THIS MANUAL B. . . . . . . . . . . . . . . . . . 3

TROUBLESHOOTING C. . . . . . . . . . . . . . . . . . . . . . . . . 12

ABBREVIATIONS D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

GLOSSARY OF TERMS AND SYMBOLS E. . . . . . . . 18

RELAY LOCATIONS F. . . . . . . . . . . . . . . . . . . . . . . . . . . 20

ELECTRICAL WIRING ROUTING G. . . . . . . . . . . . . . . 32

SYSTEM CIRCUITS H. . . . . . . . . . . . . . . . . . . . . . . . . . . 47

GROUND POINT I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

POWER SOURCE (Current Flow Chart) J. . . . . . . . . 198CONNECTOR LIST K. . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

PART NUMBER OF CONNECTORS L. . . . . . . . . . . . . 210

OVERALL ELECTRICAL WIRING DIAGRAM M. . . . . 214


A INTRODUCTIONThis 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 TROUBLESHOOTING 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 ROUTINGDescribes 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.


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

Rear

Com

bina

tion

Ligh

t RH

R 7

Rear

Com

bina

tion

Ligh

t LH

R 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

)

Stop

Stop

Rear

Li

ghts


B HOW TO USE THIS MANUAL* The system shown here is an EXAMPLE ONLY. It is different to the actual

circuit shown in the SYSTEM CIRCUITS SECTION.


B[A] : System Title[B] : Indicates a Relay Block. No shading is used and

only 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 harness

connector. 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 thecomponents 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 = BrownL = Blue V = Violet SB = Sky BlueR = Red G = Green LG = Light GreenP = Pink Y = Yellow GR = GrayO = OrangeThe 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 Bfor 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 components 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]


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 SW21 : Closed with the brake pedal depressed

L4 Light Failure Sensor1, 2, 7Ground : Approx. 12 volts with the stop light SW on

4, 8Ground : Approx. 12 volts with the ignition SW at ON position11Ground : Always continuity

: Parts Location

Code See Page Code See Page Code See PageC7 34 L4 36 R7 37H17 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)IB 20 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)3C 22 Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)

: Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)IE1 42 Floor Wire and Instrument Panel Wire (Left Kick Panel)BV1 50 Luggage Room Wire and Floor Wire (Luggage Room Left)

: Ground Points

Code See Page Ground Points LocationBL 50 Under the Left Center PillarBO 50 Back Panel Center

: Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice PointsI5 44 Cowl Wire B18 50 Luggage Room Wire

System Outline

Service Hints


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 partsstarting with that letter.

Example : L 4

Parts 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 instrument

panel.

[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 this

manual, 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 on

page 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.


B HOW TO USE THIS MANUALThe 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

WB

WB

WB

WB

WB

WB

WB

WB

WB WB

WB

WB WB

WB

WB WB WB

WB

WB

WB

WB

WB

WB

WB

WB WB WB

WB

BR

WB

BR BR

WB

WBWB

WB

WB

WB

WBWB WB

WB

WB

WB

WB

WB

BR

WB

BRBR

BR

WB (4AGZE)

WBWB

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

WB

WB

WBWB

WB

WB

WB

WB

WB

WB

WB

WB

WB

WB

WB

I 6

I 6

I 23C7

10

A

A

A

A

A

A

JunctionConnector

J 1

WB

WB

WB

W

B

BRWB

WB

WB

WB

WB

WB

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

IdleUp 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.


BThe 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.

ACC

S 2

6

6 5

2

2

2

Battery 30A AM2

Starter

Short Pin

100A ALT

Fusible Link Block

60A ABS

10A ECUB

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

BO 1

1

2

2

3

4

3

4

WB

WB

BW

BW

E 7

E 7

B

B

W 1.25B FL MAIN

50A MAIN

7.5A AM2

15A HAZRADIO

2

2

2

2

2

W

W

EB1

EB1

7

6WR

I 2 I 2

I 2

W W

W

W

W

1

1

1

1

40A DOOR LOCK CB

7.5A DOME

1 WL

R

1

1

2

4 3

1

11

1

1 1

1

G

G

WR

15A TAIL

20A DEFOGBY

8 4

3 2

Ignition SWI 8

BY1 1

PL

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

WR

WW

W

GWA

M2

AM1

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 57

1 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 81 2

AA

AAA A

A B BA A B C C C

D DD D

I14 I15 I16 J1 J2Dark Gray Gray Black


B HOW TO USE THIS MANUAL

[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)[B] : Junction Connector

Indicates 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

9098011070

Part Number

D 4 Diode (Courtesy)Code

9098011608

A 2 A/C Condenser Fan Motor 9098011237 D 5 Diode (Interior Light) 9098010962A 3 A/C Condenser Fan Relay 9098010940 D 6 Diode (Moon Roof) 9098011608A 4 A/C Condenser Fan Resistor 9098010928

9098011271

D 7 Door Lock Control Relay 9098010848

A 5 A/C Magnetic Clutch

9098011413

D 8 Door Lock Control SW LH9098011148

A 6 A/T Oil Temp. Sensor

9098011151

D 9 Door Lock Control SW RH

A 7 ABS Actuator

9098011009

Door Courtesy SW LH9098011097

A 8 ABS Actuator

9098010941

Door Courtesy SW RH

A 9 ABS Speed Sensor Front LH

9098011002

Door Courtesy SW Front LH

ABS Speed Sensor Front RH

9098011856

Door Courtesy SW Front RH9098011156

Airbag Sensor Front LH Door Courtesy SW Rear LH

Airbag Sensor Front RH Door Courtesy SW Rear RH

A10

A11

A12

A13 Airbag Squib 9098011194 Door Key Lock and Unlock SW LH9098011170

9098011070

D10

D11

D12

D13

D14

D15

D16

D17 Door Key Lock and Unlock SW RH

Part NumberPart NamePart Name

[A] [B] [C]


B

[A] : Part Code[B] : Part Name[C] : Part Number

Toyota 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


C TROUBLESHOOTINGVOLTAGE 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 voltage

between the check points.(b) Contact the two leads of an ohmmeter to each of the check

points.

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 k W /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


CFINDING 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 the

test 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)


C TROUBLESHOOTINGHOW 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 ORTERMINAL 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 NonWaterproof Type Connector

HINT : The needle insertion position varies according to theconnectors shape (number of terminals etc.), socheck the position before inserting it.

Case 1Raise the terminal retainer up to the temporary lockposition.

Case 2Open 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)


C

[B] For Waterproof Type ConnectorHINT : Terminal retainer color is different

according to connector body.Example:Terminal Retainer : Connector BodyBlack or White : GrayBlack or White : Dark GrayGray or White : Black

Case 1Type 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 connectors shape(Number of terminals etc.), so checkthe position before inserting it.

Case 2Type 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


C TROUBLESHOOTINGPush 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.


ABBREVIATIONS D

ABBREVIATIONSThe following abbreviations are used in this manual.

A/C = Air Conditioning

A/T = Automatic Transaxle

ABS = AntiLock 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 = LeftHand

M/T = Manual Transaxle

O/D = Overdrive

R/B = Relay Block

RH = RightHand

SFI = Sequential Multiport Fuel InjectionSRS = 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


E GLOSSARY OF TERMS AND SYMBOLS

BATTERYStores chemical energy andconverts it into electrical energy.Provides DC current for the autosvarious 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 lowvoltage DC currentinto highvoltage 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 highvoltage 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 manyLEDs, LCDs, or fluorescentdisplays, which provide a relative ordigital display.

FUEL

FUSIBLE LINKA heavygauge 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


ERELAY

Basically, 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.

circuits, therebystopping (1) orallowing (2) currentflow.

1. NORMALLY OPEN

2. NORMALLY CLOSED

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


F RELAY LOCATIONS[Engine Compartment]

[Body]


F[Instrument Panel]


F RELAY LOCATIONS1 : Engine Room R/B

Engine Compartment Left (See Page 20): Engine Room J/B Engine Compartment Left (See Page 20)


Memo


F RELAY LOCATIONS

: Instrument Panel J/B Lower Finish Panel (See Page 21)


F


F RELAY LOCATIONS[Instrument Panel J/B Inner Circuit]


F


F RELAY LOCATIONS3 : RH R/B Right Side of the Instrument Panel Reinforcement

: RH J/BRight Side of the Instrument Panel Reinforcement (See Page 21)


F[RH J/B Inner Circuit]


F RELAY LOCATIONS

: Center J/B Behind the Combination Meter (See Page 21)


F[Center J/B Inner Circuit]


G ELECTRICAL WIRING ROUTINGPosition of Parts in Engine Compartment

A 1 A/C Magnetic ClutchA 2 A/T Shift Lever Position SW

BackUp 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

B 1 BackUp Light SWB 2 Brake Fluid Level Warning SW

C 1 Camshaft Position SensorC 2 Camshaft Timing Oil Control Valve (VVT)C 3 Crankshaft Position SensorC 4 Cruise Control Actuator

E 1 Electronically Controlled Transmission SolenoidE 2 Engine Coolant Temp. Sensor

F 1 Front Fog Light LHF 2 Front Fog Light RHF 3 Front Parking Light LH

Front Turn Signal Light LHF 4 Front Parking Light RH

Front Turn Signal Light RHF 5 Front Washer MotorF 6 Front Wiper Motor

G 1 GeneratorG 2 Generator

H 1 Headlight LH (High)H 2 Headlight LH (Low)H 3 Headlight RH (High)H 4 Headlight RH (Low)H 5 Heated Oxygen Sensor (Bank 1 Sensor 1)H 6 Horn


GPosition of Parts in Engine Compartment

I 1 Idle Air Control ValveI 2 Ignition Coil and Igniter No.1I 3 Ignition Coil and Igniter No.2I 4 Ignition Coil and Igniter No.3I 5 Ignition Coil and Igniter No.4I 6 Injector No.1I 7 Injector No.2I 8 Injector No.3I 9 Injector No.4

J 1 Junction Connector

K 1 Knock Sensor

M 1 Mass Air Flow Meter

N 1 Noise Filter (Ignition)

O 1 Oil Pressure SW

P 1 Power Steering Oil Pressure SWP 2 Pressure SW

R 1 Radiator Fan MotorR 2 Radiator Fan Resistor

S 1 Skid Control ECU with ActuatorS 2 StarterS 3 Starter

T 1 Throttle Position Sensor

V 1 Vehicle Speed Sensor (Combination Meter)V 2 VSV (Canister Closed Valve)V 3 VSV (EVAP)

W 1 Washer Level Sensor


G ELECTRICAL WIRING ROUTINGPosition of Parts in Instrument Panel

A 8 A/C SWAir Inlet Control SWDefroster Mode Detection SW

A10 A/T Shift Lever IlluminationO/D Main SW

A 11 Air Inlet Control Servo MotorA12 Airbag Sensor AssemblyA13 Airbag Sensor AssemblyA14 Airbag Sensor AssemblyA15 Airbag Squib (Front Passenger Airbag Assembly)A16 Airbag Squib (Steering Wheel Pad)A17 Antenna AmplifierA18 Automatic Light Control Sensor

B 3 Blower MotorB 4 Blower ResistorB 5 Blower SWB 6 Buckle SW LH

Seat Position SensorB 7 Buckle SW RH

Occupant Detection Sensor

C 5 Cigarette LighterPower Outlet (Front)

C 6 Cigarette Lighter IlluminationC 7 ClockC 8 Clutch Start SWC 9 Combination MeterC10 Combination SWC11 Combination SWC12 Combination SWC13 Cruise Control Clutch SWC14 Cruise Control ECU

D 1 Data Link Connector 3D 2 Daytime Running Light Relay

E 3 Engine Control ModuleE 4 Engine Control ModuleE 5 Engine Control ModuleE 6 Engine Control Module


GPosition of Parts in Instrument Panel

F 7 Front Passenger Seat Belt Warning Light

G 3 Glass Breakage Sensor ECU

H 7 Hazard SWH 8 Heated Oxygen Sensor (Bank 1 Sensor 2)

I 10 Ignition SWI 11 Integration Relay

J 2 Junction ConnectorJ 3 Junction ConnectorJ 4 Junction ConnectorJ 5 Junction ConnectorJ 6 Junction ConnectorJ 7 Junction Connector

P 3 Parking Brake SWP 4 Power Outlet (Rear)

R 3 Radio and PlayerR 4 Radio and PlayerR 5 Rear Window Defogger SWR 6 Remote Control Mirror SWR 7 Rheostat

S 4 Security IndicatorS 5 Shift Lock Control ECUS 6 Side Airbag Squib LHS 7 Side Airbag Squib RHS 8 Starter Cut RelayS 9 Stop Light SW

T 2 Turn Signal Flasher RelayT 3 TVIP ECU

U 1 Unlock Warning SW


G ELECTRICAL WIRING ROUTINGPosition of Parts in Body

A19 ABS Speed Sensor Rear LHA20 ABS Speed Sensor Rear RH

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

Fuel Sender

H 9 High Mounted Stop Light

I 12 Inner MirrorPersonal Light

I 13 Interior Light

J 8 Junction ConnectorJ 9 Junction ConnectorJ 10 Junction Connector

L 1 License Plate Light LHL 2 License Plate Light RHL 3 Luggage Compartment LightL 4 Luggage Compartment Light SW


GPosition of Parts in Body

M 2 Moon Roof Control Relay and SWPersonal Light

M 3 Moon Roof Motor and Limit SW

N 2 Noise Filter (Rear Window Defogger)

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

R 9 Rear Combination Light LHR10 Rear Combination Light LHR11 Rear Combination Light RHR12 Rear Combination Light RHR13 Rear Speaker LHR14 Rear Speaker RHR15 Rear Window DefoggerR16 Rear Window DefoggerR17 Remote Control Mirror LHR18 Remote Control Mirror RH

S10 Side Airbag Sensor LHS 11 Side Airbag Sensor RH

T 4 Tweeter LHT 5 Tweeter RH

V 4 Vapor Pressure SensorV 5 VSV (Vapor Pressure Sensor)


G ELECTRICAL WIRING ROUTING: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points

: Location of Splice Points


GConnector Joining Wire Harness and Wire Harness

1 2 3 4 56 7 8 9 10

5 4 3 2 110 9 8 7 6

EA1

Code Joining Wire Harness and Wire Harness (Connector Location)EA1 Engine Wire and Engine Room Main Wire (Inside of the Engine Room R/B)


G ELECTRICAL WIRING ROUTING: Location of Connector Joining Wire Harness and Wire Harness

: Location of Ground Points



Code Joining Wire Harness and Wire Harness (Connector Location)IA1IA2IA4 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)IA5

g ( )

IA6IB1 Engine Room Main Wire and Floor Wire (Cowl Side Panel LH)IC1IC2 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)IC3

( )


G ELECTRICAL WIRING ROUTING: Location of Connector Joining Wire Harness and Wire Harness




Code Joining Wire Harness and Wire Harness (Connector Location)ID1

Instrument Panel Wire and Floor Wire (Left Kick Panel)ID2 Instrument Panel Wire and Floor Wire (Left Kick Panel)IE1 Instrument Panel Wire and Instrument Panel No.4 Wire (Behind the Combination Meter)IF1 Console Box Wire and Instrument Panel Wire (Under the Instrument Panel Center)IG1 Instrument Panel Wire and Instrument Panel No.3 Wire (Front Side of the Parking Brake Lever)IH1 Instrument Panel Wire and A/C Sub Wire (Left Upper Side of the Blower Unit)II1

Engine Wire and Instrument Panel Wire (Blower Unit RH)II2 Engine Wire and Instrument Panel Wire (Blower Unit RH)IJ1

Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)IJ2 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)IK1 Roof Wire and Instrument Panel Wire (Left Side of the Instrument Panel)


G ELECTRICAL WIRING ROUTING: Location of Connector Joining Wire Harness and Wire Harness: Location of Ground Points




1 2 34 5 6 7 8

1238 7 6 5 4

1 2 34 5 6 7 8

1238 7 6 5 4 1 2 2 1

1 2 12 1 2 12 1 2 12

BA1 BB1 BC1

BD1

Gray

BE1 BF1

Code Joining Wire Harness and Wire Harness (Connector Location)BA1 Rear Door LH Wire and Floor Wire (Left Center Pillar)BB1 Rear Door RH Wire and Instrument Panel Wire (Right Center Pillar)BC1 Skid Control Sensor Wire LH and Floor Wire (Quarter Wheel House LH)BD1 Skid Control Sensor Wire RH and Floor Wire (Quarter Wheel House RH)BE1 Speaker Tweeter LH Wire and Front Door LH Wire (Inside of the Front Door LH)BF1 Speaker Tweeter RH Wire and Front Door RH Wire (Inside of the Front Door RH)


Memo


SYSTEM CIRCUITS H

2004 COROLLAELECTRICAL WIRING DIAGRAM

SYSTEM CIRCUITSPage

ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188Automatic GlareResistant EC Mirror with Compass . . . . . . . . . . . . . . . . . . . 112BackUp Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118Electronically Controlled Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Fog Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76Headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90Key Reminder Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168Light Reminder Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168Moon Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140Power Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48Power Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114Radiator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186Radio and Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110Seat Belt Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78TVIP System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126


Power Source

1A1 1 2

1 2

1 2

1 2

1 2

1 2

1 2

1 2

1 2

1 2

1 21

1

1

1

1

1

1

1C1

1

1

1

1 2

IB1

IF12

1B1 G 2

IA42

IM3 6

IM

1D1

1

3

2

5

3

1

5

2

1

1

1

1

1

1

1

1

1 21

30A ABS NO. 1

40A ABS NO. 2

30A RDI FAN

15A FOG

100A ALT

5A ALTS

15A EFI

30A MAIN

10A HAZARD

40A HEAD MAIN

10A HORN

15A DOME

HEAD Relay

DIMMER Relay

30A POWER

15A AM2

25A DOOR

15A TAIL

15A STOP

15A P/POINT

10A ECUB

7. 5A OBD

25A AM1

R

L

BW

G

W

W

RW

BR

GW

BR

R

RY

WR

RB

R

RB

BW

LW

B

W

B

WW

BG

B

RR

B

FL M

AIN

2. 0L

Batte

ry1

B Generator


1

5

3

2

6

4

AM2

AM1

ACC

IG1

IG2

ST2

IF6

IA1

1

1

10A HEAD RH LWR

10A HEAD LH LWR

1

1

1

1

2

2

10A HEAD RH UPR

10A HEAD LH UPR

1

1

1

1

2

2

1 2

1 2 5

1

3

2

IF2

5

1

3

2

IF4 IH10

IE IG

J 7J 6

IM2

2

5

1

3

4

3

3

3

3 3

IM5

30A DEFOG

40A HEATER

IG1 Relay

DEF Relay

I10

HTR Relay

10A MHTR/DEF IUP

10A A/C

10A GAUGE

10A ECUIG

15A WASHER

25A WIPER

RW

R

RW

R

RB

R

W

B BW

R

BY

LR

LWRW

15A CIG

W

AA

A

WB

WB

WB

BW

WB B

Ignition SW

JunctionConnector

JunctionConnector

21Noise Filter


Power Source

HEAD Relay35 : 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 SW

13 : Closed with the ignition SW at ACC or ON position12 : Closed with the ignition SW at ON or ST position56 : Closed with the ignition SW at ON or ST position54 : Closed with the ignition SW at ST position

: Parts LocationCode See Page Code See Page Code See PageG2 32 J6 35I10 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)


Code See Page Junction Block and Wire Harness (Connector Location)IA

25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)IB 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)IF

25IH 25 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)IM 24

( )

1A22 Engine Wire and Engine Room J/B (Engine Compartment Left)1B 22 Engine Wire and Engine Room J/B (Engine Compartment Left)

1C22 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1D 22 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

: Connector Joining Wire Harness and Wire HarnessCode 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 LocationIE 40 Behind the Combination MeterIG 40 Right Kick Panel

Service Hints


Memo


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

BR

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

BWBW

R

BR 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

BW BR(*1)(*1)

( *2)

SRLY

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

)

WB

( *1)

R(A/T)

WB

B

Park

/Neu

tral P

ositio

n SW

Clut

ch St

art

SW

Ignition SW

Junc

tion

Conn

ecto

r

Junc

tion

Conn

ecto

r

JunctionConnector

Starter

Sta

rter

Cut

Rela

y TVIP

EC

U


EC

B8

E 2

GND4

IGT3

IGF2

A11

1

+B

GND4

IGF2

IGT3

1

+B

GND4

IGF2

IGT3

1

+B

GND4

IGF2

IGT3

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)

BW

R ( A/T

)

BW

BW

BW

BW

BW

BW

BW

BW

BW BW BW

WB

LY W W

B

LY

GR

WB

LY

YG

WB

LY

RL

YG

GR

LY

WRLR

LY

LY

LY

WB

WBWBWB

WB

( A/T

)

LY

* 1 : w/ TVIP System* 2 : w/o TVIP System

Engine Control Module

Ignition Coil andIgniter No. 1




Junction Connector

Noise

Fi

lter

( Ignit

ion)

IGFIGT1 IGT2 IGT3 IGT4

STA

NSW


Starting and Ignition

I10 Ignition SW54 : Closed with the ignition SW at ST position56 : 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 LocationCode See Page Code See Page Code See Page

A2 32 I4 33 N1 33C8 34 I5 33 S2 A 33

E3 A 34 I10 35 S3 B 33E4 B 34 J2 A 35 S8 35

I2 33 J3 B 35 T3 35I3 33 J6 35

: Relay Blocks

Code See Page Relay Blocks (Relay Block Location)1 22 Engine Room R/B (Engine Compartment Left)


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 25IL

24Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)

IM 24( )

1A 22 Engine Wire and Engine Room J/B (Engine Compartment Left)

: Connector Joining Wire Harness and Wire HarnessCode 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)IA2IA4 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)II2 42 Engine Wire and Instrument Panel Wire (Blower Unit RH)

: Ground Points

Code See Page Ground Points LocationEC 38 Left Side of the Cylinder HeadIE 40 Behind the Combination Meter

: Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice PointsE2

38 Engine WireI7

42 Instrument Panel WireE3 38 Engine Wire I9 42 Instrument Panel Wire

I2 42 Instrument Panel Wire

Service Hints


Memo


Charging

1A1

B

100A

AL

T

1

2

1B1

5A AL

TS

1

2

1

30A

MAI

N

1

2

1

BR

IA42

BR

IM3

15AAM2

IM6

5 6AM2 IG2

ST2B

WBG

I10

IG L S B

IC REGULATOR

A2 A1 A3 B1

IL5

IK8

Char

ge

32

31

C 9

3B9

3B10

II22

AB

BC

3B22

3B20

II214

10AGAUGE

From Power Source System(See Page 48)

IG2

RW

RW

Y

RW

YB

O

J 4(A), J 5(B)

G 1(A), G 2(B)

RW Y

W

BG

Battery

FL MAIN2. 0L

EA15

W

BW

W

BG

Com

binat

ion

Met

er

Generator

Ignition SW

JunctionConnector


G1 (A) Generator(A) 3Ground : 13.214.0 volts with the engine running at 5000 rpm and 115C (239F)(A) 1Ground : 04 volts with the ignition SW at ON position and the engine not running

: Parts LocationCode See Page Code See Page Code See PageC9 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)


Code See Page Junction Block and Wire Harness (Connector Location)IG 25IK

Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)IL 24 Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)IM1A

22 Engine Wire and Engine Room J/B (Engine Compartment Left)1B 22 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 HarnessCode 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


Engine Control

Battery

1A1

30A

MAI

N

15A

EFI

1 1

IA42

IM3

15A

AM2

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

WB

B

BB B

R

GR

WB

B

GR

B

B

R

RW

BW

BO

BW

R

RW

R R

R R

R

BB

B

B

BW

BW

BW

BO

BW

RW

RW

RW

BR

BR

B

2 2

1 1

BWBW

EFI R

elay

BW

( 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 R

elay

F10

J 2( A

)

A 2

J 2( A

) , J 3( B

)

C 8

Park

/Neu

tral

Posit

ion

SW

Clut

ch St

art S

W

Fuel

Pu

mp

Ignition SW

Junc

tion

Conn

ecto

r

Junc

tion

Conn

ect

or

M


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

BO

BW

RW

R

B

B

GR

B

BW

(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

)

RW

RL

YG

LY

GR LY W

RL

LY

LY

GR

LY

WW

B

BW

WB

BW

WB

BW

WB

BW

WB

BO

BW

WB

BW

WB

BW

BBB

WB

B ( A/T

)

B ( M/T

)G

R

WB

WB

WB

WB

WB

BL

LB

BB

WB

I 2 I 3 I 4 I 5

LY

YG

J 2(A), J 3(B)

J 4( A

) , J 5( B

)

I 1 V 3

Idle

Ai

r Con

trol V

alve

Igni

tion

Co

il and

Ignite

r No.

1

Igni

tion

Co

il and

Ignite

r No.

2

Igni

tion

Co

il and

Ignite

r No.

3

Igni

tion

Co

il and

Ignite

r No.

4

Junction Connector

Jun

ctio

n Co

nnec

tor

VSV

( EVA

P)

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


Engine Control

2

1

2

1

2

1

2

1

I10 I10 I10

II18

2

1

10AMHTR/DEF IUP


IL8

II217 II210

2

1

I10

IG

A

1

I10

1

2

BO

BW

B B B

BR

BR

BO

BW BW

BW

BW

BW

BW

BW

W

BYYLWBY

L

WB

LR G LW

YB

W

LB

WB 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

Cont

rol V

alve

( VVT

)

Engin

e Co

olant

Te

mp.

Se

nso

r

Injec

tor

No. 1

Injec

tor

No. 2

Injec

tor

No. 3

Injec

tor

No. 4

JunctionConnector

Mas

s Ai

r Fl

ow M

eter

Pow

er St

eerin

g O

ilPr

essu

re SW

VSV

( Can

ister

Cl

ose

d Va

lve)

VG E2G THA

+B E2

A1 A2 A3 A4 A15 A14 D13

C1 B28 B29 B24 B32 A20 A19

OCVOCV+

CCV EC THW


THAEVGVGPSW

#10 #20 #30 #40 ELS2


AH AH

BF BF

AH

ID21 ID22

ID26

BD

AB AB

II216

2

1

ID28

ID27

15ATAIL


IH7

OFF

Tail

Head

Ligh

tCo

ntro

l SW

2 5

1 3

3 3

3 3

I 4

15ASTOP

IC14

1

2

IC5 IL1

3C13 3C11

II7

IJ6

BO

BR

BR

B B

B

BO

GW GW

G

Y

Y

BR

B

BR BR

Y

Y

BR LL

Y LG

BR

RR

B

GW

GB G

GG

W

Y

LW

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)

( USA

)

( USA

)(USA) (USA)

C12

TAIL

Re

lay

GW

GW

RW

( w/ C

ruise

Co

ntro

l)

A13

C14

S 9

13

10

Airb

ag S

enso

r As

sem

bly

Combination SW

Crui

se Co

ntro

l ECU

Junc

tion

Conn

ecto

r

Junc

tion

Conn

ect

or

Stop

Li

ght S

W

Thro

ttle

Po

sitio

n Se

nsor

Vapo

r Pre

ssur

e Se

nsor

VSV

( Vap

or Pr

ess

ure

Se

nsor

)

A28 D21 A18 A21 D4

D12 C19 D14 D16

E2


ELS F/PS IDLO

VC VTA TBPPTNK

STP


Engine Control

4B2 4B1 4B4

4B3

II16

I10

II218 II29

H 5

H 8

I11

FAN

NO. 2

Rela

yLG

B

FAN

NO. 1

Rela

yLG

A/C

SWG

W

M/G

CL

T Re

lay

YB

Pres

sure

SW

Y

A/C

The

rmist

orB

L

1

2

AE AE

BA

2

1

BO BO

(*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

PB

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

Sens

or

Cran

ksha

ft Po

sitio

n Se

nso

r

Heat

ed O

xyge

n Se

nsor

( Ban

k 1

Sens

or 1)

Hea

ted

Oxyg

en Se

nso

r( B

ank

1 Se

nso

r 2)

Junc

tion

Conn

ecto

r

Def

rost

er M

ode

Dete

ctio

n SW

YA/

C SW

Def

rost

er M

ode

Dete

ctio

n SW

D1B4 B23 C4 B21

D7 D6 C33A/CS

31 CC2 A13 C32 27 A A34 A26NE+

+BE 3(A), E 4(B), E 5(C), E 6(D)Engine Control Module

CFFAN ACLDACMG PRS THR NE G22+

HT1A OX1A OX1BHT1B


II28

AA AA

BA BA BA BA

AA AA AA

EB

3B2 4C3

3B3 4C4

II11

IE

4B21

4B16

7. 5AOBD


IJ7

BO BO

RY

YR

B

VW

(*1)

(*1)

BR

BR

BR

LR

PB P

LR

PB P BR W

B

RB

RB

( *1)

BR B W VW B YR

( *1)

( *1)

( *1)

BR

WB

RY

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

WB

1

K 1

Data Link Connector 3

Junc

tion

Conn

ecto

r

Junc

tion

Conn

ecto

r

Kno

ck Se

nso

r

B7 B1 B2

D18 D20 D19

D11C14D5C17E1 EKNK TACH


THWO W

SIL TC WFSE

KNK1 SPD


Engine Control

10AGAUGE


IG2

3B22

3B203B16

II214

AB

BC

4C8

4C9

I 2

IA614 II24

AC

BC

EB

Spee

dom

eter

Tach

omet

er

32 4

33 8 19 10 9

17 3 1 2

YR B

VW

WG

RW

RW

BO

RW

BO

RY

YR

B

VW

Mal

func

tion

Indic

ator

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)

WG

( w/ A

BS)

WG

V 1

S 1

J 2( A

) , J 3( B

)

J 4( A

) , J 5( B

)

C 9

Skid Control ECUwith Actuator

Com

binat

ion

Me

ter

Junc

tion

Conn

ecto

r

Junc

tion

Conn

ecto

r

Vehicle Speed Sensor(Combination Meter)


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 builtin 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


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 idleup 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. FailSafe 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 failsafe system either controls the system by using the data (Standard values)recorded in the engine control module memory or else stops the engine.


C/OPN Relay53 : Closed with the starter running and the engine running

EFI Relay53 : Closed with the ignition SW at ON or ST position

E2 Engine Coolant Temp. Sensor12 : Approx. 15.04 kW (20C, 4F)

Approx. 5.74 kW ( 0C, 32F)Approx. 2.45 kW (20C, 68F)Approx. 0.318 kW (80C, 176F)

E3 (A), E4 (B), E5 (C), E6 (D) Engine Control ModuleVoltage at engine control module wiring connectors

+BE1 : 914 volts (Ignition SW at ON position)VCE1 : 4.55.5 volts (Ignition SW at ON position)

VTAE1 : 0.30.8 volts (Ignition SW on and throttle valve fully closed): 3.24.9 volts (Ignition SW on and throttle valve fully open)

EVGE1 : 3.33.9 volts (Ignition SW at ON position)THAE1 : 0.53.4 volts (Engine idling and intake air temp. 080C, 32176F)THWE1 : 0.21.0 volts (Engine idling and engine coolant temp. 60120C, 140248F)STAE1 : 614 volts (Engine cranking)

IGT1, IGT2, IGT3, IGT4E1 : Pulse generation (Engine idling)IGFE1 : Pulse generation (Engine idling)FCE1 : 914 volts (Ignition SW on and engine stopping)

03 volts (Engine idling)WE1 : 914 volts (Engine idling and warning light off)

A/CSE1 : 914 volts (Ignition SW on and A/C SW off)SPDE1 : Pulse generation (Driving approx. 20 km/h)ELSE1 : 7.514 volts (Ignition SW on and taillight on)

ELS2E1 : 7.514 volts (Ignition SW on and rear window defogger on)NSWE1 : 03 volts (Engine cranking)

#10, #20, #30, #40E1 : Pulse generation (Engine idling)NE+ NE : Pulse generation (Engine idling)

RSOE1 : Pulse generation (Engine idling)G2+ NE : Pulse generation (Engine idling)

TBPE1 : 9.014.0 volts (Ignition SW on)PTNKE1 : 3.03.6 volts (Ignition SW at ON position and remove fuel cap)

OX1A, OX1BE1 : Pulse generation (Maintain engine speed at 2500 rpm for two minutes after warming up.)HT1A, HT1BE1 : 9.014.0 volts (Ignition SW at ON position)

03.0 volts (Engine idling)KNK1E1 : Pulse generation (Engine idling)

EVPE1 : 9.014.0 volts (Ignition SW at ON position)TACHE1 : Pulse generation (Engine idling)

Service Hints


Engine Control : Parts Location

Code See Page Code See Page Code See PageA2 32 F10 36 J4 A 35A13 34 H5 32 J5 B 35C1 32 H8 35 J6 35C2 32 I1 33 J7 35C3 32 I2 33 K1 33C8 34 I3 33 M1 33C9 34 I4 33 P1 33C12 34 I5 33 S1 33C14 34 I6 33 S9 35D1 34 I7 33 T1 33E2 32 I8 33 V1 33

E3 A 34 I9 33 V2 33E4 B 34 I10 35 V3 33E5 C 34 J2 A 35 V4 37E6 D 34 J3 B 35 V5 37

: 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)


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)IGIH

25II 25

IJ Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)IK

( )

IL 24IM1A 22 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)3C 28 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)4C 30 Instrument Panel Wire and Center J/B (Behind the Combination Meter)

: Connector Joining Wire Harness and Wire HarnessCode 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)IA2IA4

40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)IA5 40 Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)IA6ID2 42 Instrument Panel Wire and Floor Wire (Left Kick Panel)II1

42 Engine Wire and Instrument Panel Wire (Blower Unit RH)II2 42 Engine Wire and Instrument Panel Wire (Blower Unit RH)


: Ground Points

Code See Page Ground Points LocationEB

38 Left Side of the Cylinder HeadEC 38 Left Side of the Cylinder Head

ED 38 Front Left Suspension TowerIE 40 Behind the Combination MeterIG 40 Right Kick PanelBH 44 Under the Left Quarter Pillar

: Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice PointsE2

38 Engine WireI7 42 Instrument Panel Wire

E3 38 Engine Wire I1042 Engine WireI2

42 Instrument Panel WireI11 42 Engine Wire

I4 42 Instrument Panel Wire


Headlight


IG2

3B8

3B10

3B16

RW

10A

GAUG

E

RW

12

8

II22

L

1

3B22

3B12

OFF Low

Head

High

Dim

mer

SW

Tail

Flash

Ligh

tCo

ntro

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

GY

GB

GW

GY

GO GR

Y R

Y

WB

WB

WB

10 11

R

GW WB

WB

D 2

G 1

A

WBWB

RW

J 6

RW

3

RB

10A

ECU

B

IH1

RB

( *1)

( *1)

( *1)

( *1)

( *1)

( *1)

CSB CSO CSE

ER

Y

RY

16

( *1)

(* 1)

9

( *1)

1

15A

DOM

E

LW

LW

1

2

CLTB CLTS CLTE

Automatic LightControl Sensor

Combination SW

Daytime Running Light Relay

Gen

erat

or

JunctionConnector

T H HI

IG+B

CHG

4B11

4B21



40AHEADMAIN

1

1

11

RB

RB

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

2IA41

61101314

IA515 IA515

B

B

2

1

B 2

J 1

GB

WR

RW

RW

RB

RY

RW

RW

RW

WB

WB

WR

GB(*1)

WB

RW

RY

RY

RB

RW R

RB

RB

RB

WB

RW

D 2

RB

RB

R R

HEADRelay

RB

DRL

H 2

H 4

( *2)

( *2)

( *3)

( *3)

( *1)

* 1 : USA* 2 : w/ ABS* 3 : w/o ABS

LW LW

2

1

I 3

Brak

e Fl

uid

Leve

lW

arn

ing

SW

Daytime Running Light Relay

Hea

dligh

t LH

( Low

)

Hea

dligh

t RH

( Low

)Jun

ctio

nCo

nnec

tor

ParkingBrake SW

4

GO

FOG

Com

binat

ion

SW

PKB

TAIL DIM HLPBRK

(*4)

* 4 : w/ Fog Light

12

S 1

Skid

Co

ntro

l ECU

with

Ac

tuat

orPKB


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

High

Bea

m

5 2

3 1

3 3

3 3

15ATAIL


IH7

RW

LW

RB

4C19

4C20

IL4

IC7GWRB G

W

R

WR G GB

R LW

RW G

LW

RB

LW

RR

RW

R

WB

WB

WB

WR

WB

WB

RW R

WB

WR

GB(*1)

WB

C 9H 1

H 3

( *1)

( *1)

( *1)

(* 1)

( *1)

WB

* 1 : USA

TAIL

Re

lay

DIM

MER

Re

lay

E 4

Combination Meter

Head

light

LH

( High

)

Head

light

RH

( High

)


The current is always flowing from the HEAD MAIN fuse to HEAD relay (Coil side) to TERMINAL 6 of the daytime runninglight relay, from ECUB 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 RHUPR 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 co

(manual)+toyota+corolla+2004+wiring+manual(2)

Documents

manual bthis manual

diagram manual

electrical system

system outline

system circuits h

corolla ewd533u3how

power supply

circuit connections