C1915

C1915, C1916 REAR WHEEL STEERING ANGLE SENSOR





DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.RECHECK DTC
With CONSULT-III
1. Turn the ignition switch from OFF to ON.
2. Perform self-diagnosis for "4WAS(MAIN)/RAS/HICAS".
Is DTC "C1915" or "C1916" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK 4WAS REAR ACTUATOR
1. Turn the ignition switch OFF.





2. Measure "A" and "B" of 4WAS rear actuator as shown in the figure.

CAUTION:
Measure it on the level ground or in the condition that left and right wheel are lifted up.
Is the differential of "A" and "B" 5.4 mm (0.213 in) or less?
YES - GO TO 2.
NO - Replace 4WAS rear actuator. Removal And Installation.
2.CHECK REAR WHEEL STEERING ANGLE SENSOR (1)
With CONSULT-III
1. Start engine.

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





Is the inspection result normal?
YES - GO TO 3.
NO - Replace 4WAS rear actuator. Removal And Installation.
3.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-
147, "Special Repair Requirement".
NO - GO TO 4.
4.CHECK REAR WHEEL STEERING ANGLE SENSOR (3)
Check the resistance between rear wheel steering angle sensor connector terminals. SEE Component Inspection SEE Special Repair Requirement, "Component Inspection".
Is the inspection result normal?
YES - GO TO 5.
NO - Replace 4WAS rear actuator. Removal And Installation.
5.CHECK REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY 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 6.
NO - Repair or replace each harness and connector.
6.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 "C1915" or "C1916" detected?
YES - Replace 4WAS main control unit. 4WAS Main Control Unit.
- Before replacing 4WAS main control unit, record the self-diagnosis results(history). STC-
147, "Special Repair Requirement".
NO - GO TO 7.
7.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 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".