C1661

C1661 4WAS FRONT LOCK SOLENOID VALVE





Description
- Secure the inside of 4WAS front actuator temporarily. (It operates when performing active test with fail-safe function and CONSULT-III.)
- 4WAS front lock solenoid valve is activated in the active test (lock release). The secured 4WAS front actuator is released.
- 4WAS front control unit controls 4WAS front actuator. 4WAS front actuator releases the lock when the engine speed signal is "ON". 4WAS front actuator applies the lock when the engine speed signal is "OFF".




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 4WAS front control unit self-diagnosis.
Is DTC "C1661" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK 4WAS FRONT SOLENOID VALVE CIRCUIT
Check 4WAS front solenoid valve circuit. SEE Component Inspection (4WAS Front Lock Solenoid Valve).
Is the inspection result normal?
YES - GO TO 2.
NO - Replace 4WAS front actuator. Service and Repair.
2.CHECK INFORMATION
With CONSULT-III
1. Connect 4WAS front actuator harness connector.
2. Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. With 4WAS.
Is each data the standard value?
YES - Check each harness connector pin terminal for disconnection.
NO - Replace 4WAS front control unit. Exploded View.




Component Inspection (4WAS Front Lock Solenoid Valve)
1.CHECK 4WAS FRONT SOLENOID VALVE CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect 4WAS front actuator harness connector.
3. Check the resistance between 4WAS front actuator harness connectors.





4. Check the continuity between 4WAS front actuator harness connector and the ground.





Is the inspection result normal?
YES - INSPECTION END.
NO - Replace 4WAS front actuator. Service and Repair.




Special Repair Requirement

AFTER REPLACING 4WAS FRONT ACTUATOR
- Perform 4WAS front actuator adjustment after replacing 4WAS front actuator. Special Repair Requirement (Pattern 2).

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".

AFTER REPLACING 4WAS FRONT CONTROL UNIT
- Perform 4WAS front actuator adjustment after replacing 4WAS front control unit. Special Repair Requirement (Pattern 3).