C1911

C1911, C1912 RAS MOTOR POWER SUPPLY





Description
The power supply for RAS motor.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Without CONSULT-III
1. Start the engine.
2. Perform the self-diagnosis. Diagnosis Description.
Is DTC "C1911", "C1912" or "RAS warning lamp flickering pattern:12" detected?
YES - Proceed to diagnosis procedure. C1911.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK RAS CONTROL UNIT POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect RAS control unit harness connector.
3. Check the voltage between RAS control unit harness connector and ground.





4. Turn the ignition switch ON.

CAUTION:
Never start the engine.
5. Check the voltage between RAS control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NG - Check the following items. Repair or replace the malfunctioning parts.
- 10A fuse (#45) open
- Short among 10A fuse (#45) connector, RAS control unit harness connector No. 27 terminal and the ground
- Open between the ignition switch and RAS control unit harness connector No. 27 terminal
- Ignition switch
2.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (1)
1. Turn the ignition switch OFF.
2. Remove RAS motor relay.
3. Check the continuity between RAS motor relay harness connector and ground.





4. Check the continuity between RAS motor relay harness connector and RAS control unit harness connector.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace the harnesses and connectors.
3.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (2)
Check the voltage between RAS motor relay harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Check the following items. Repair or replace the malfunctioning parts.
- 20A fuse (#37) open
- Short among 20A fuse (#37) connector, RAS motor relay harness connector No. 3 terminal and the ground
- Open between the battery and RAS motor relay harness connector No. 3 terminal
4.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (3)
1. Connect RAS control unit harness connector.
2. Turn the ignition switch ON.

CAUTION:
Never start the engine.
3. Check the voltage between RAS control unit harness connector and ground.





4. Turn the ignition switch OFF.
Is the inspection result normal?
YES - GO TO 5.
NO - Replace RAS control unit. RAS Control Unit.
5.CHECK RAS MOTOR RELAY
Check the RAS motor relay. C1911.
Is the inspection result normal?
YES - GO TO 6.
NO - Replace RAS motor relay.
6.CHECK RAS MOTOR POWER SUPPLY
1. Install RAS rear motor relay.
2. Turn the ignition switch ON.

CAUTION:
Never start the engine.
3. Check the voltage between RAS control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 7.
NO - Replace RAS control unit. RAS Control Unit.
7.PERFORM SELF-DIAGNOSIS (RAS CONTROL UNIT)
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform "4WAS(MAIN)/RAS/HICAS" self-diagnosis.
Without CONSULT-III
1. Start the engine.
2. Perform the self-diagnosis. Diagnosis Description.
Is DTC "C1911", "C1912" or "RAS warning lamp flickering pattern:12" detected?
YES - Proceed to diagnosis procedure. C1911.
NO - GO TO 8.
8.CHECK INFORMATION
With CONSULT-III
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 RELAY
1. Turn the ignition switch OFF.
2. Disconnect RAS motor relay harness connector.
3. Apply 12 V to RAS motor relay connector No. 1 terminal and No. 2 terminal.

CAUTION:
- Never make the terminals short.
- Connect the fuse between the terminals when applying the voltage.
4. Check the continuity between RAS motor relay connector.





5. Check the resistance between RAS motor relay connector.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace RAS motor relay.




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".