Toyota Sequoia (2005). Manual - part 294

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–971

1165

DTC

C1311 / 12

Open or Short Circuit in Brake Inhibit
Relay Circuit

CIRCUIT DESCRIPTION

Built in the stop lamp circuit and prohibits the stop lamp from turning on under VSC control.

DTC No.

DTC Detecting Condition

Trouble Area

C1311 / 12

Open or short circuit is detected.

Brake inhibit relay

Brake inhibit relay circuit

DI93S–03

F19773

ABS & VSC Actuator
(Skid Control ECU)

G–Y

S14 
Stop Light SW

I18 Ignition SW

1

4

W

W–L

IG1

AM1

2

1

B–Y

Instrument Panel J/B

2

1

1L

1F

1F

1C

1C

1

2

4

6

STOP

AM1

ECU–IG

W

4

B–R

Sub J/B No.3

3C

8

3A

8

B–R

B–R

J37

A

J/C

J38

A

B8 Brake 
Inhibit Relay

B–R

L–O

L–O

IL1

7

L–O

S1

38

BSW

STP

S1

39

G–Y

IL2

13

1

2

3

4

G–Y

4B

1

1

1

4A

4C

J11

A

J10

C

J/C

C J10

G–Y

G–W

G–W

G–W

G–W

B

J33

J34

H

G–W

C

C

C

J44

C

J45

J

R8 Rear Combination Light RH

1

4

W–B

R7 Rear Combination Light LH

1

4

H9 High Mounted 
Stop Light

A

A

A

J19 
J/C

W–B

W–B

BD2

12

1

2

W–B

G–W

G–W

BD1

4

(*1)

(*1)

(*2)

(*2)

W–B

H9 
High Mounted 
Stop Light

1

2

J57
J/C

BP

BJ

F10 
Fusible 
Link
Block

ALT

8

5

B

Battery

*1: w/o Rear Spoiler
*2: w/   Rear Spoiler

J/C

G–W

J/C

G–W

Sub J/B No.4

Stop

Stop

DI–972

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1166

WIRING DIAGRAM

F13968

ON

1

3

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–973

1167

INSPECTION PROCEDURE

1

Check voltage between terminals 1 and 3 of the brake inhibit relay and body
ground.

PREPARATION:
Remove the brake inhibit relay from the connector.
CHECK:
(a)

Turn the ignition switch to the ON position.

(b)

Measure the voltage between terminal 1 of the brake in-
hibit relay harness side connector and body ground.

OK:

Voltage: 10 to 14 V

CHECK:
Measure the voltage between terminal 3 of the brake inhibit
relay harness side connector and body ground when the brake
pedal is depressed.
OK:

Voltage: 8 to 14 V

NG

Check and repair harness or connector.

OK

F17285

1

2

3

4

1

4

3

2

DI–974

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1168

2

Check brake inhibit relay.

CHECK:
Check continuity between the following terminals of the brake
inhibit relay.
OK:

Terminals 1 and 2

Continuity

(Reference value 62 

Ω

)

Terminals 3 and 4

Continuity

CHECK:
(a)

Apply battery positive voltage between terminals 1 and 2.

(b)

Check continuity between terminals.

Terminals 3 and 4

Open

NG

Replace brake inhibit relay.

OK

3

Check for open and short circuit in harness and connector between brake inhibit
relay and skid control ECU (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

If the same code is still indicated after the DTC is deleted, check the condition of each connection.
If the connections are normal, the skid control ECU may be defective.

NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page 

DI–897

).