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

C1627:

DTC CONFIRMATION PROCEDURE

1. RECHECK DTC

With CONSULT-III
1. Start the engine.

CAUTION: Stop the vehicle.

2. Steer to 360° leftward slowly. Then steer to 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:"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:"4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 2)". Programming and Relearning

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