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Body Electrical Diagnosis and Repair Course T502 B-1 COROLLA EM0340U HOW TO USE THIS MANUAL This manual provides information on the electrical circuits installed on vehicles by dividing

Body Electrical Diagnosis and Repair Course T502 B-1

COROLLA (EM0340U)

HOW TO USE THIS MANUAL

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 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

how to use an Electrical Wiring Manual

TOYOTA Collision Repair and Refinish

B-2

Appendix B

TOYOTA Collision Repair and Refinish

[B]

Rear Light

Stop Stop

7

Stop Light

2

(BAT)

15A STOP

(IG)

IB IB

7.5A GAUGE

4 3

1

[A]

S6

Stop Light SW

G – W 1 2

[D]

[C]

[E]

[F]

[G]

[N]

L4

Light Failure Sensor

3C

3C

15 IE1

IE1 14

7

15

4 8

13 4

50

[K]

[H]

[I]

[L]

[M]

[J]

11

H17

High Mounted Stop Light (Shielded)

L B O

B BV1 W – B

G – R BV1

1 2

6

3

3 4

1

1

1 2

COROLLA (EM0340U)

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.

Body Electrical Diagnosis and Repair Course T502 B-3

TOYOTA Collision Repair and Refinish

B-4

Appendix B

TOYOTA Collision Repair and Refinish

Body Electrical Diagnosis and Repair Course T502 B-5

TOYOTA Collision Repair and Refinish

B-6

Appendix B

TOYOTA Collision Repair and Refinish

Body Electrical Diagnosis and Repair Course T502 B-7

TOYOTA Collision Repair and Refinish

B-8

Appendix B

TOYOTA Collision Repair and Refinish

Body Electrical Diagnosis and Repair Course T502 B-9