C1661
C1661 4WAS FRONT LOCK SOLENOID VALVEDescription
^ 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
C1661:
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. Refer to "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
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 >> GO TO 2.
NO >> Replace 4WAS front actuator.
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. 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 control unit.
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.
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
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. Refer to STC-28, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 3)". 4WAS Front Actuator Neutral Position Adjustment