C1627

C1627 4WAS FRONT ACTUATOR





Description
- Wiring connected to 4WAS front actuator is integrated with 4WAS front actuator.
- 4WAS front actuator rotates together with steering wheel.
- 4WAS front actuator mainly consists of five components. [4WAS front lock solenoid valve (lock structure), front wheel steering angle sensor, 4WAS front motor, gear shaft, and spiral cable]
- 4WAS front lock solenoid valve (lock structure) is controlled by the 4WAS front control unit, and locks/unlocks 4WAS front actuator.
- If a strong force (rotation direction) is applied to 4WAS front actuator, the locking mechanism (holder) absorbs the force and locks 4WAS front actuator.
- Front wheel steering angle sensor detects a turning angle of 4WAS front motor.
- 4WAS front motor controls number of revolutions by a command value from the 4WAS front control unit.
- Gear shaft is an output axis of 4WAS front motor. (Gear shaft = 4WAS front motor revolution + steering angle)
- Spiral cables mean the power line and signal lines of 4WAS front motor.




DTC Logic

DTC DETECTION LOGIC






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

CAUTION:
Stop 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 4WAS front control unit self-diagnosis.
Is DTC "C1627" detected?
YES - Proceed to diagnosis procedure. Refer to C1627.
NO - INSPECTION END




Diagnosis Procedure
1.PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis
Is any DTC detected other than "C1627"?
YES - Check the error system.
NO - GO TO 2.
2.PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis.
Is DTC "C1627" detected?
YES - Replace 4WAS front actuator. Refer to Service and Repair.
NO - GO TO 3.
3.CHECK INFORMATION
With CONSULT-III
Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. Refer to 4WAS Front Control Unit.
Is each data the standard value?
YES - Check each harness connector pin terminal for disconnection.
NO - Replace 4WAS front actuator. Refer to Service and Repair.




Special Repair Requirement

AFTER REPLACING 4WAS FRONT ACTUATOR
- Perform 4WAS front actuator adjustment after replacing 4WAS front actuator. Refer to Special Repair Requirement (Pattern 2) Special Repair Requirement (Pattern 3), "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 2)".

AFTER REPLACING 4WAS FRONT CONTROL UNIT
- Perform 4WAS front actuator adjustment after replacing 4WAS front control unit. Refer to Special Repair Requirement (Pattern 2) Special Repair Requirement (Pattern 3), "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 3)".