C1904

C1902, C1903, C1904, C1910, C1913 4WAS REAR MOTOR OUTPUT





Description
- 4WAS rear motor activates 4WAS rear actuator.
- Maintain the toe-stiffness of rear wheels against the road external force because the irreversible sufficiency performance hypoid gear is used.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.RECHECK DTC
With CONSULT-III
1. Perform "SELF DIAGNOSTIC MODE" item on "ACTIVE TEST" of 4WAS main control unit.

CAUTION:
Perform the active test while stopping the vehicle.
2. Perform 4WAS main control unit self-diagnosis.
Is DTC "C1902", "C1903", "C1904", "C1910" or "C1913" detected?
YES - Proceed to diagnosis procedure. Refer to C1902.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK 4WAS REAR MOTOR CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect 4WAS main control unit harness connector.
3. Disconnect 4WAS rear motor harness connector.
4. Check the continuity between 4WAS main control unit harness connector and 4WAS rear motor harness connector.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace the harnesses and connectors.
2.CHECK 4WAS REAR MOTOR
Check the continuity between 4WAS rear motor connector terminals.





Is the inspection result normal?
YES - GO TO 3.
NO - Replace 4WAS rear actuator. Refer to Exploded View.
3.PERFORM ACTIVE TEST (4WAS MAIN CONTROL UNIT)
With CONSULT-III
1. Connect 4WAS main control unit harness connector.
2. Connect 4WAS rear motor harness connector.
3. Perform "SELF DIAGNOSTIC MODE" item on "ACTIVE TEST" of 4WAS main control unit.

CAUTION:
Perform the active test while vehicle is stopped.
4. Check "MOTOR VOLTAGE", "MOTOR CURRENT" and "MTR CRNT OPE" while performing the active test.





Is "MONITOR" the standard value?
YES - GO TO 4.
NO - Replace 4WAS rear actuator. Refer to Exploded View.
4.PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
Perform 4WAS main control unit self-diagnosis.
Is any DTC "C1902", "C1903", "C1904", "C1910" or "C1913" detected?
YES - Replace 4WAS main control unit. Refer to Exploded View.
NO - GO TO 5.
5.CHECK INFORMATION
With CONSULT-III
Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. Refer to 4WAS Main Control Unit.
Is each data the standard value?
YES - Check each harness connector pin terminal for disconnection.
NO - Replace 4WAS main control unit. Refer to Exploded View.




Component Inspection (4WAS Rear Motor)
1.CHECK 4WAS REAR MOTOR
1. Turn the ignition switch OFF.
2. Disconnect 4WAS main control unit harness connector and 4WAS rear motor harness connector.
3. Check the continuity between 4WAS rear motor connector terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace 4WAS rear actuator. Refer to Exploded View.




Special Repair Requirement

BEFORE REPLACING 4WAS MAIN CONTROL UNIT
- Record the self-diagnosis results (history).

CAUTION:
- Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit after diagnosis.
- Erase the memory of the self-diagnosis results (record) after printing out or recording all the values of "DATA MONITOR".