C1628

C1628 4WAS FRONT ACTUATOR





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.RECHECK DTC
With CONSULT-III
1. Start the engine.

CAUTION:
Never drive the vehicle.
2. Steer 360� leftward slowly. Then steer 360� rightward to return the steering wheel to the straight-ahead position. Repeat the same service for 1 minute or more.

NOTE:
The protection function mode (overheat protection) activates and the system stops if steering repeats for a long time.
3. Perform self-diagnosis for "4WAS(FRONT)".
Is DTC "C1628" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK FRONT WHEEL STEERING ANGLE SENSOR CIRCUIT (1)
1. Turn the ignition switch OFF.
2. Disconnect 4WAS front control unit harness connector.
3. Check the continuity between 4WAS front control unit harness connector and the ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace the harnesses and connectors.
2.CHECK FRONT WHEEL STEERING ANGLE SENSOR CIRCUIT (2)
1. Connect 4WAS front control unit harness connector.
2. Turn the ignition switch ON.

CAUTION:
Never start the engine.
3. Check the continuity between 4WAS front control unit harness connectors.





Is the inspection result normal?
YES - GO TO 3.
NO - Replace 4WAS front control unit. 4WAS Front Control Unit.
3.CHECK FRONT WHEEL STEERING ANGLE SENSOR CIRCUIT (3)
1. Turn the ignition switch OFF.
2. Disconnect 4WAS front actuator harness connector.
3. Disconnect 4WAS front control unit harness connector.
4. Check the continuity between 4WAS front actuator and 4WAS front control unit harness connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair replace error-detected parts.
4.CHECK FRONT WHEEL STEERING ANGLE SENSOR SIGNAL
With CONSULT-III
1. Connect 4WAS front actuator harness connector.
2. Connect 4WAS front control unit harness connector.
3. Start the engine.

CAUTION:
Never drive the vehicle.
4. Rotate the steering wheel slowly. Check "ACT PATTERN" item on "DATA MONITOR" for
"4WAS(FRONT)".
Does not the value of "DATA MONITOR" change?
YES - Replace 4WAS front actuator. Removal And Installation. After replacing, perform DTC confirmation procedure again. When DTC "1628" is detected, Replace
4WAS front control unit. 4WAS Front Control Unit.
- Before replacing 4WAS front control unit, record the self-diagnosis results (history). SEE Special Repair Requirement.
NO - Check 4WAS front actuator harness connector pin terminal for disconnection.




Special Repair Requirement
Before replacing 4WAS front control unit, record the self-diagnosis results (history).

CAUTION:
- Never erase the memory (history) of self-diagnosis results when replacing 4WAS front control unit after diagnosis.
- Erase the memory of the self-diagnosis results (record) after printing out or recording all the values of "DATA MONITOR".