C1138

C1138 4WAS SYSTEM

Description

The ABS actuator and electric unit (control unit) and the 4WAS control unit exchange signals via the CAN
communication line.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn the ignition switch OFF
and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK SELF-DIAGNOSIS RESULTS

1.Turn the ignition switch OFF to ON.
2.Perform self-diagnosis for "ABS" with CONSULT.
Is DTC "C1138" detected?
YES- Proceed to diagnosis procedure. .
NO- INSPECTION END


Diagnosis Procedure


1. PERFORM 4WAS FRONT CONTROL UNIT AND 4WAS MAIN CONTROL UNIT SELF-DIAGNOSIS

Perform self-diagnosis for "4WAS(FRONT)" and "4WAS(MAIN/RAS/HICAS)" with CONSULT.
Is any DTC detected?
YES- Check the DTC.
NO- GO TO 2.

2. ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS

1.Erase self-diagnosis results for "ABS" with CONSULT.
2.Turn the ignition switch OFF.
3.Start the engine. Drive the vehicle for a while.
4.Make sure that 4WAS warning lamp turns OFF.
5.Stop the engine. Perform self-diagnosis for "ABS" with CONSULT.
Is DTC "C1138" detected?
YES- Replace ABS actuator and electric unit (control unit).
NO- Check the ABS actuator and electric unit (control unit) harness connector terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace error detected parts.


Special Repair Requirement


1. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit) or steering angle sensor and removing steering angle sensor. Special Repair Requirement.
- END