Toyota Sequoia (2005). Manual - part 287

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–943

1137

INSPECTION PROCEDURE

1

Check engine control system.

CHECK:
Check engine control system (See page 

DI–43

).

RESULT:

DTC is not output

A

DTC is output

B

B

Repair engine control system according to the
output code (See page 

DI–58

).

A

2

Check DTC of translate ECU.

CHECK:
Check DTC of the translate ECU (See page 

DI–911

).

RESULT:

DTC is output (53, 65, 94)

A

DTC is not output

B

B

Go to step 4.

A

3

Check for open and short circuit in harness and connector between skid control
ECU and translate ECU (CAN1 circuit).

NG

Repair or replace harness or connector
(CAN1 circuit).

OK

DI–944

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1138

4

Replace the translate ECU and check if trouble occurs again.

PREPARATION:
(a)

Clear the DTC (See page 

DI–911

).

(b)

Turn the ignition switch OFF.

CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:

DTC is output

A

DTC is not output

B

B

END

A

Replace skid control ECU 
(See page 

BR–52

).

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

DI–897

).

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DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–945

1139

DTC

C1223 / 43

 Malfunction in ABS Control System

CIRCUIT DESCRIPTION

HINT:
This DTC is output when the VSC system detects a malfunction in the ABS system.

DTC No.

DTC Detecting Condition

Trouble Area

C1223 / 43

ABS control system is abnormal.

ABS control system

INSPECTION PROCEDURE

1

Check DTC (See page 

DI–911

).

PREPARATION:
(a)

Clear the DTC.

(b)

Turn the ignition switch OFF.

CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:

DTC is output

A

DTC is not output

B

B

No problem.

A

Repair circuit indicated by output code
(See page 

DI–921

).

DI93K–03

DI–946

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1140

DTC

C1231 / 31, C1335 / 35

Steering Angle Sensor Circuit

CIRCUIT DESCRIPTION

The steering angle sensor signal is sent to the skid control ECU via the CAN communication system. When
there is a malfunction in the communication system, the DTCs will be detected by the diagnosis function.

DTC No.

DTC Detecting Condition

Trouble Area

C1231 / 31

Data is not transmitted to the steering angle sensor for a

fixed time invalid steering angle sensor data.

Translate ECU

Steering angle sensor

Steering angle sensor communication circuit

Skid control ECU

CAN communication system

C1335 / 35

When the +BS terminal voltage is 9.5 V or more, data trans-

mission from the steering angle sensor is impossible for 1

sec. or more.

Translate ECU

Steering angle sensor

Steering angle sensor to translate ECU circuit

Skid control ECU

CAN1 communication system

DI93L–04