C1654

C1654 4WAS FRONT ACTUATOR RELAY





Description
- It performs control inside 4WAS front control unit.
- The actuator relay turns ON when turning the ignition switch ON.
- When turning the ignition switch from ON to OFF, the actuator relay remains ON and is turned OFF after a few minutes due to the 4WAS front control unit control.




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 "C1654" detected?
YES - Proceed to diagnosis procedure. Refer to C1654.
NO - INSPECTION END




Diagnosis Procedure
1. 4WAS FRONT MOTOR GROUND INSPECTION
1. Turn the ignition switch OFF.
2. Check the continuity between 4WAS front control unit harness connector and the ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace the harnesses and connectors.
2. 4WAS FRONT MOTOR POWER SUPPLY INSPECTION
1. Start the engine.

CAUTION:
Stop the vehicle.
2. Check the voltage between 4WAS front control unit harness connectors.





Is the measurement value "9 V" or less?
YES - Check the following items. Repair or replace the malfunctioning parts.
- 4WAS front control unit harness connector pin terminal and connection
- 40A fusible link (#I) open
- Short among 40A fusible link (#I) connector, 4WAS front control unit harness connector No. 11 terminal and the ground
- Open between the battery and 4WAS front control unit harness connector No. 11 terminal
- Battery
NO - GO TO 3.
3. 4WAS FRONT CONTROL UNIT SIGNAL INSPECTION
With CONSULT-III
1. Start the engine.

CAUTION:
Stop the vehicle.
2. Check "MOTOR VOLT" item on "DATA MONITOR" of 4WAS front control unit.
Does the item on "DATA MONITOR" indicate "16 V" or more?
YES - Perform the symptom diagnosis for the charging system. Refer to Symptom Related Diagnostic Procedures.
NO - Replace 4WAS front control unit. Refer to Exploded View.




Special Repair Requirement

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 Special Repair Requirement (Pattern 2) Special Repair Requirement (Pattern 3), "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : Special Repair Requirement (Pattern 3)".