C1918

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.RECHECK DTC
With CONSULT-III
1. Start the engine.

CAUTION:
Stop the vehicle.
2. Perform the active test.
3. Perform 4WAS main control unit self-diagnosis.
Is DTC "C1917" or "C1918" detected?
YES - Proceed to diagnosis procedure. Refer to C1917.
NO - INSPECTION END




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

CAUTION:
Check the condition with the vehicle stopped.
2. Check "RR ST ANG-MAI" and "RR ST ANG-SUB" item on "DATA MONITOR" of 4WAS main control unit.





Is the inspection result normal?
YES - GO TO 2.
NO - Replace 4WAS rear actuator. Refer to Exploded View.
2.CHECK REAR WHEEL STEERING ANGLE SENSOR (2)
Check the voltage between 4WAS main control unit harness connector terminal and ground.





Is the differential between terminal voltage No. 4 and No.7 approximately 1 V or more?
YES - Replace 4WAS main control unit. Refer to Exploded View.
NO - GO TO 3.
3.CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
1. Turn the ignition switch OFF.
2. Disconnect rear wheel steering angle sensor harness connector.
3. Check the resistance between rear wheel steering angle sensor connector terminals.





Is the inspection result normal?
YES - GO TO 4.
NO - Replace 4WAS rear actuator. Refer to Exploded View.
4.CHECK REAR WHEEL STEERING ANGLE SENSOR GROUND CIRCUIT
1. Disconnect 4WAS main control unit harness connector.
2. Check for continuity between 4WAS main control unit harness connector terminal and rear wheel steering angle sensor harness connector terminal.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace each harness and connector.
5.PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)
With CONSULT-III
1. Connect 4WAS main control unit harness connector.
2. Connect rear wheel steering angle sensor harness connector.
3. Perform 4WAS main control unit self-diagnosis.
Is DTC "C1917" or "C1918" detected?
YES - Replace 4WAS main control unit. Refer to Exploded View.
NO - GO TO 6.
6.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 standard?
YES - Check the pin terminal and connection of each harness connector for non-standard conditions.
NO - Replace 4WAS main control unit. Refer to Exploded View.




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