C1912

C1911, C1912 RAS MOTOR POWER SUPPLY





Description
The power supply for RAS motor.




DTC Logic

DTC DETECTION 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 RAS control unit self-diagnosis.
Without CONSULT-III
1. Start the engine.
2. Perform the self-diagnosis. Refer to Diagnosis Description.
Is DTC "C1911", "C1912" or "RAS warning lamp flickering pattern:12" detected?
YES - Proceed to diagnosis procedure. Refer to 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. Remove the noise suppressor.
2. Check continuity between the noise suppressor harness connector and ground.





3. Check the continuity between the noise suppressor harness connector and RAS motor relay harness connector.





4. Check the continuity between the noise suppressor harness connector and RAS control unit harness connector.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace the harnesses and connectors.
5.CHECK RAS MOTOR POWER SUPPLY CIRCUIT (4)
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 6.
NO - Replace RAS control unit. Refer to Exploded View.
6.CHECK RAS MOTOR RELAY
1. Check the RAS motor relay. Refer to C1911.
Is the inspection result normal?
YES - GO TO 7.
NO - Replace RAS motor relay.
7.CHECK NOISE SUPPRESSOR
Check the noise suppressor. Refer to C1911.
Is the inspection result normal?
YES - GO TO 8.
NO - Replace the noise suppressor.
8.CHECK RAS MOTOR POWER SUPPLY
1. Install RAS rear motor relay.
2. Install the noise suppressor.
3. Turn the ignition switch ON.

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





Is the inspection result normal?
YES - GO TO 9.
NO - Replace RAS control unit. Refer to Exploded View.
9.PERFORM SELF-DIAGNOSIS (RAS CONTROL UNIT)
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform RAS control unit self-diagnosis.
Without CONSULT-III
1. Start the engine.
2. Perform the self-diagnosis. Refer to Diagnosis Description.
Is DTC "C1911", "C1912" or "RAS warning lamp flickering pattern:12" detected?
YES - Proceed to diagnosis procedure. Refer to C1911.
NO - GO TO 10.
10.CHECK INFORMATION
With CONSULT-III
Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. Refer to RAS Control Unit.
Is each data the standard value?
YES - Check each harness connector pin terminal for disconnection.
NO - Replace RAS control unit. Refer to Exploded View.




Component Inspection (RAS Motor Relay)
1.CHECK RAS MOTOR RELAY
1. 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.
2. Check the continuity between RAS motor relay connector.





3. Check the resistance between RAS motor relay connector.





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




Component Inspection (Noise Suppressor)
1.CHECK NOISE SUPPRESSOR
Check continuity between the noise suppressor connector.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace the noise suppressor.




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".