C1633

C1633 4WAS FRONT CONTROL UNIT

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. RECHECK DTC

With CONSULT
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. .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK 4WAS FRONT CONTROL UNIT (1)

With CONSULT
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). Refer to
.
NO- GO TO 2.

2. CHECK 4WAS FRONT CONTROL UNIT (2)

With CONSULT
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). Refer to
.

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). Refer to
.


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".