C1633

C1633 4WAS FRONT CONTROL UNIT





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.RECHECK DTC
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform self-diagnosis for "4WAS(FRONT)".
Is DTC "C1633" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK 4WAS FRONT CONTROL UNIT (1)
With CONSULT-III
1. Start the engine.

CAUTION:
Never drive the vehicle.
2. Check "THERM TEMP" on "DATA MONITOR" for "4WAS(FRONT)".
3. Steer the steering wheel 360� leftward slowly and then steer 360� rightward. Return the steering wheel to the straight-ahead position. Repeat the same service for 3 minutes.
4. Check "THERM TEMP" on "DATA MONITOR" for "4WAS(FRONT)".
Is DATA MONITOR value difference between before and after the service 3� or less?
YES - 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 - GO TO 2.
2.CHECK 4WAS FRONT CONTROL UNIT (2)
With CONSULT-III
1. Start the engine.

CAUTION:
Never drive the vehicle.
2. Check "THERM TEMP" item on "DATA MONITOR" for "4WAS(FRONT)".
3. Steer the steering wheel 360� leftward slowly and then steer 360� rightward. Return the steering wheel to the straight-ahead position. Repeat the same service for 3 minutes.
4. Check "THERM TEMP" item on "DATA MONITOR" for "4WAS(FRONT)".





Is the inspection result normal?
YES - GO TO 3.
NO - 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.
3.CHECK INFORMATION
- Check that any item below is applicable when malfunction occurs.
- Entering and exiting the garage (Frequent steering)
- When steering the steering wheel for a long time
Is the item applicable?
YES - 4WAS system protection function mode (overheat protection)(4WAS system temporary stop)
NO - 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.




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".