Inspect Horn Relay Assy Marking HORN

(a) Remove the horn relay from the engine room J/B.

(b) Inspect the horn relay continuity. Standard:

Terminal No.

Condition

Specified condition

1 o 2

Constant

Continuity

3 o 5

Apply B+ between terminals 1 and 2

If the result is not as specified, replace the relay.

This manual provides information on the electrical circuits installed on vehicles by dividing them into a circuit for each system.

The actual wiring of each system circuit is shown from the point where the power source is received from the battery as far as each ground point. (All circuit diagrams are shown with the switches in the OFF position.)

When troubleshooting any problem, first understand the operation of the circuit where the problem was detected (see System Circuit section), the power source supplying power to that circuit (see Power Source section), and the ground points (see Ground Point section). See the System Outline to understand the circuit operation.

When the circuit operation is understood, begin troubleshooting of the problem circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing sections to find each part, junction block and wiring harness connectors, wiring harness and wiring harness connectors, splice points, and ground points of each system circuit. Internal wiring for each junction block is also provided for better understanding 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 Electrical Wiring Diagram at the end of this manual.

Stop Light

* The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

From Power Source System (See Page 66)

15A STOP

7.5A GAUGE

Stop Light SW

Light Failure Sensor

i h17

I High Mounted Stop Light

I High Mounted Stop Light

Combination Meter

Light Failure Sensor

Ecu Pinout

ABS ECU

: System Title

: Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B

Example: CD Indicates Relay Block No.1

: ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different.

: Indicates related system.

: Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows ( ^ ). Outside numerals are pin numbers.

Female

Female

The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component's location, e.g, "E" for the Engine Compartment, "I" for the Instrument Panel and Surrounding area, and "B" for the Body and Surrounding area.

When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiring harness and wiring harness connector.

[F] : Represents a part (all parts are shown in sky blue).

The code is the same as the code used in parts position.

[G] : 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.

Example:

3C indicates that it is inside Junction Block No.3

Indicates the wiring color.

Wire colors are indicated by an alphabetical code.

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 the second letter indicates the color of the stripe.

The first letter indicates the basic wire color and the second letter indicates the color of the stripe.

: Indicates a wiring Splice Point (Codes are "E" for the Engine Room, "I" for the Instrument Panel, and "B" for the Body).

The Location of splice Point I 5 is indicated by the shaded section.

[J] : Indicates a shielded cable.

[K] : Indicates the pin number of the connector.

The numbering system is different for female and male connectors.

Example: Numbered in order from upper left to lower right

1

2

3

>

(

4

5

6

Numbered in order from upper right to lower left

Male

Female Indicates a ground point.

The first letter of the code for each ground point(s) indicates the component's location, e.g, "E" for the Engine Compartment, "I" for the Instrument Panel and Surrounding area, and "B" for the Body and Surrounding area.

- System Outline -

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 flows through the rear lights warning light to TERMINAL 4 of the light failure sensor.

Stop Light Disconnection Warning

When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the disconnection 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 lights warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning circuit on and holds the warning light on until the ignition SW is turned off.

Service Hints

S6 Stop Light SW

2-1 : Closed with the brake pedal depressed

L4 Light Failure Sensor

1, 2, 7-Ground : Approx. 12 volts with the stop light SW on 4, 8-Ground : Approx. 12 volts with the ignition SW at ON position 11-Ground: Always continuity

[P] Q : Parts Location

Code

See Page

Code

See Page

Code

See Page

C7

34

L4

36

R7

37

H17

36

R6

37

S6

35

Q : Relay Blocks

Code

See Page

Relay Blocks (Relay Block Location)

1

18

R/B No.1 (Instrument Panel Brace LH)

[R] ^^ : 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 Location

BL

50

Under the Left Center Pillar

BO

50

Back Panel Center

: Splice Points

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

[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.

T"11-Parts is 4th in order

'-Light 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 wiring harness 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.

The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between ground points ( and shown below) can also be checked this way.

I GROUND POINT

Toyota Rav4 Fuses 10a Dome

* The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

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 system are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully understood.

J POWER SOURCE (Current Flow Chart)

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.

Battery

30A AM2

Starter

Fusible Link Block

10A ECU-B

Short Pin

2

2

7.5A DOME

15A EFI

10A HAZARD

2

20A RADIO NO.1

10A HORN

60A ABS

©

Engine Room R/B (See Page 20)

~ft Deterrent and Door-i

Power Source

Fuse

System

Page

ABS

194

ABS and Traction Control

187

20A

STOP

Cruise Control

180

Electronically Controlled Transmission

166

Multiplex Communication System

210

Cigarette Lighter

214

Combination Meter

230

Headlight

112

10A

DOME

Interior Light

122

Light Auto Turn Off ^—•-----

~ft Deterrent and Door-i

40A DOOR LOCK CB

40A DOOR LOCK CB

Corolla Door Lock 1997

* The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

K CONNECTOR LIST

Dark Gray

Gray

Dark Gray

[Al I16

\ Black

[Al I16

\ Black

Fl

m

A

A

A | A

Gray

Dark Gray

Dark Gray

Gray

Black

Black

E

0

1

Topip

Auto Horn Terminal

Gray

Black

J2

A

B

B

y up

D

A

A

B

C|C|C|D

Dark Gray

Black

Dark Gray

Indicates connector to be connected to a part. (The numeral indicates the pin No.) Junction Connector

Indicates a connector which is connected to a short terminal.

Junction Connector

Junction Connector

2000 Toyota Camry Junction Connector

Same Color

Short Terminal

Junction connector in this manual include a short terminal which is connected to a number of wire harnesses. Always perform inspection with the short terminal installed. (When installing the wire harnesses, the harnesses can be connected to any position within the short terminal grouping. Accordingly, in other vehicles, the same position in the short terminal may be connected to a wire harness from a different part.)

Wire harness sharing the same short terminal grouping have the same color.

Same Color

Short Terminal

The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which start with the same letter.

[D] : Connector Color

Connectors not indicated are milky white in color.

L PART NUMBER OF CONNECTORS

Code

Part Name

Part Number

Code

Part Name

Part Number

A/C Ambient Temp. Sensor

90980-11070

Diode (Courtesy)

90980-11608

A/C Condenser Fan Motor

90980-11237

Diode (Interior Light)

90980-10962

A/C Condenser Fan Relay

90980-10940

Diode (Moon Roof)

90980-11608

A/C Condenser Fan Resistor

90980-10928

Door Lock Control Relay

90980-10848

A/C Magnetic Clutch

A/T Oil Temp. Sensor

90980-11271

Door Lock Control SW LH

90980-11413

Door Lock Control SW RH

90980-11148

ABS Actuat o[rB]

ABS Actuator

9098 [C] 151 90980-11009

Door Courtesy SW LH

Door Courtesy SW RH

90980-11097

ABS Speed Sensor Front LH

ABS Speed Sensor Front RH

Airbag Sensor Front LH

Airbag Sensor Front RH

90980-10941

Door Courtesy SW Front LH

90980-11002

Door Courtesy SW Front RH

90980-11856

Door Courtesy SW Rear LH

Door Courtesy SW Rear RH

90980-11156

90980-11194

nijjnjock SW LH

90980-11170^

Toyota Part Number are indicated.

Not all of the above part numbers of the connector are established for the supply.

ELECTRONIC CONTROLLED AUTOMATIC TRANSAXLE [ECT] (April, 2003)

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