C1918

C1917, C1918 REAR WHEEL STEERING ANGLE SENSOR





DTC Logic

DTC DETECTION LOGIC






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

CAUTION:
Never drive the vehicle.
2. Select "SELF DIAGNOSTIC MODE" item on "ACTIVE TEST" for "4WAS(MAIN)/RAS/HICAS".
3. Perform self-diagnosis for "4WAS(MAIN)/RAS/HICAS".
Is DTC "C1917" or "C1918" 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 engine.

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





Is the inspection result normal?
YES - GO TO 2.
NO - Replace 4WAS rear actuator. Removal And Installation.
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. 4WAS Main Control Unit.
- Before replacing 4WAS main control unit, record the self-diagnosis results(history). STC-
150, "Special Repair Requirement".
NO - GO TO 3.
3.CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
Check the resistance between rear wheel steering angle sensor connector terminals. SEE Component Inspection, "Component Inspection".
Is the inspection result normal?
YES - GO TO 4.
NO - Replace 4WAS rear actuator. Removal And Installation.
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. 4WAS Main Control Unit.
- Before replacing 4WAS main control unit, record the self-diagnosis results(history). STC-
150, "Special Repair Requirement".
NO - GO TO 6.
6.CHECK INFORMATION
With CONSULT-III
Check the "DATA MONITOR" value of each DTC detected with the self-diagnosis function. 4WAS Main Control Unit, "Reference Value".
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. 4WAS Main Control Unit.
- Before replacing 4WAS main control unit, record the self-diagnosis results(history). SEE Special Repair Requirement.




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. Removal And Installation.




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".