C1902

C1902, C1903, C1904, C1910, C1913 RAS MOTOR OUTPUT

Description

- RAS motor activates RAS 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. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. DTC REPRODUCTION PROCEDURE

With CONSULT
1.Perform "SELF DIAGNOSTIC MODE" item on "ACTIVE TEST" of "4WAS(MAIN)/RAS/HICAS".

CAUTION:
Perform the active test while vehicle is stopped.
2.Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Without CONSULT
1.Start the engine.
2.Perform the self-diagnosis. Diagnosis Description.
Is DTC "C1902", "C1903", "C1904", "C1910", "C1913" or "RAS warning lamp flickering pattern:13" detected?
YES- Proceed to diagnosis procedure. .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK RAS MOTOR CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect RAS control unit harness connector.
3.Disconnect RAS motor harness connector.
4.Check the continuity between RAS control unit harness connector and RAS motor harness connector.





5.Check the continuity between RAS control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace the harnesses and connectors.

2. CHECK RAS MOTOR

Check RAS motor. .
Is the inspection result normal?
YES- GO TO 3.
NO- Replace RAS actuator assembly. Exploded View.

3. PERFORM ACTIVE TEST

With CONSULT
1.Connect RAS control unit harness connector.
2.Connect RAS motor harness connector.
3.Perform "SELF DIAGNOSTIC MODE" item on "ACTIVE TEST" of "4WAS(MAIN)/RAS/HICAS".

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





Without CONSULT
1.Disconnect RAS control unit harness connector.
2.Disconnect RAS motor harness connector.
3.Start the engine.
4.Check the voltage between RAS control unit harness connector and ground.





Is the standard value?
YES- GO TO 4.
NO- Replace RAS actuator assembly. Exploded View.

4. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Turn the ignition switch ON.
2.Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Without CONSULT
1.Connect RAS control unit harness connector.
2.Connect RAS motor harness connector.
3.Start the engine.
4.Perform the self-diagnosis. Diagnosis Description.
Is DTC "C1902", "C1903", "C1904", "C1910" or "RAS warning lamp flickering pattern:13" detected?
YES- Replace RAS control unit. RAS Control Unit.
NO- GO TO 5.

5. CHECK INFORMATION

With CONSULT
1.Select "DATA MONITOR" of "4WAS(MAIN)/RAS/HICAS".
2.Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. With Rear Active Steer.
Is each data the standard value?
YES- Check each harness connector pin terminal for disconnection.
NO- Replace RAS control unit. RAS Control Unit.


Component Inspection


1. CHECK RAS MOTOR

1.Turn the ignition switch OFF.
2.Disconnect RAS motor harness connector.
3.Check the continuity between RAS motor connector terminals.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace RAS actuator assembly. Exploded View.


Special Repair Requirement


BEFORE REPLACING RAS CONTROL UNIT

- Record the self-diagnosis results (history).

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