C1917

C1917, C1918 REAR WHEEL STEERING ANGLE SENSOR





Description
- It detects the steering angle condition of rear wheel.
- 2 systems (main and sub sensor) are equipped.




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 "C1917", "C1918" or "RAS warning lamp flickering pattern:24" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK REAR WHEEL STEERING ANGLE SENSOR (1)
With CONSULT-III
1. Start the engine.

CAUTION:
Check condition with the vehicle stopped.
2. Select "DATA MONITOR" of "4WAS(MAIN)/RAS/HICAS".
3. Check "RR ST ANG-MAI" and "RR ST ANG-SUB" item on "DATA MONITOR" of RAS control unit.





Is the inspection result normal?
YES - GO TO 2.
NO - Replace RAS actuator assembly. Exploded View.
2.CHECK REAR WHEEL STEERING ANGLE SENSOR (2)
Check the voltage between RAS control unit harness connector and ground.





Is the differential between terminal voltage No. 4 and No.7 approximately 1 V or more?
YES - Replace RAS control unit. RAS Control Unit.
NO - GO TO 3.
3.CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
Check the rear wheel steering angle sensor. SEE Component Inspection.
Is the inspection result normal?
YES - GO TO 4.
NO - Replace RAS actuator assembly. Exploded View.
4.CHECK REAR WHEEL STEERING ANGLE SENSOR GROUND CIRCUIT
1. Disconnect RAS control unit harness connector.
2. Check for continuity between RAS control unit harness connector terminal and rear wheel steering angle sensor harness connector.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace each harness and connector.
5.PERFORM SELF-DIAGNOSIS
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 "C1917", "C1918" or "RAS warning lamp flickering pattern:24" detected?
YES - Replace RAS control unit. RAS Control Unit.
NO - GO TO 6.
6.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 standard?
YES - Check pin terminal and connection of each harness connector for non-standard conditions.
NO - Replace RAS control unit. RAS Control Unit.




Component Inspection
1.CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
1. Turn the ignition switch OFF.
2. Disconnect rear wheel steering angle sensor harness connector.
3. Check resistance between rear wheel steering angle sensor connector.





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".