C1627
C1627 4WAS FRONT ACTUATORDescription
^ 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
C1627:
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 "Diagnosis Procedure".
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.
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 STC-142, "Reference Value". 4WAS Front Control Unit
Is each data the standard value?
YES >> Check each harness connector pin terminal for disconnection.
NO >> Replace 4WAS front actuator.
Special Repair Requirement
AFTER REPLACING 4WAS FRONT ACTUATOR
^ Perform 4WAS front actuator adjustment after replacing 4WAS front actuator. Refer to STC-28, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 2)". 4WAS Front Actuator Neutral Position Adjustment
AFTER REPLACING 4WAS FRONT CONTROL UNIT
^ Perform 4WAS front actuator adjustment after replacing 4WAS front control unit. Refer to STC-28, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 3)". 4WAS Front Actuator Neutral Position Adjustment