Inspection 6 Rear Main Signal and Rear Sub Signal Malfunction

TROUBLE DIAGNOSIS


Inspection 6 Rear Main Signal and Rear Sub Signal Malfunction

1.CHECK RAS CONTROL UNIT CONNECTOR
1. Turn ignition switch OFF, disconnect RAS control unit harness connector and rear wheel steering angle sensor harness connector, and check terminal for deformation, disconnection, looseness, etc.
2. Reconnect harness connector securely, and perform self-diagnosis.





Is above displayed on self-diagnosis display?
YES - GO TO 2.
NO - Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the terminal.
2.CHECK (1): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, and disconnect rear wheel steering angle sensor harness connector B487.





2. Check continuity rear wheel steering angle sensor harness connector B487 and ground.

Terminal 4 - Ground: Continuity should exist.





3. Turn ignition switch ON, and then check voltage rear wheel steering angle sensor harness connector B487 and ground.

Terminal 1 - Ground: Approx. 5 V

OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.CHECK (2): REAR WHEEL STEERING ANGLE SENSOR POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B487 and RAS control unit harness connector B476.





2. Check continuity each harness connector of rear wheel steering angle sensor harness connector B487 (A) and RAS control unit harness connector B476 (B).





OK or NG
OK - RAS control unit malfunction. Replace RAS control unit.
NG - Harness between rear wheel steering angle sensor and
RAS control unit open or shorted. Repair or replace harness.
4.CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL
1. Connect rear wheel steering angle sensor harness connector B487.





2. Check voltage RAS control unit harness connector B476 when starting the engine and turning the steering wheel from neutral position clockwise/counterclockwise by 180�.





OK or NG
OK - RAS control unit malfunction. Replace RAS control unit.
NG - GO TO 5.
5.CHECK REAR WHEEL STEERING ANGLE SENSOR OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF, disconnect rear wheel steering angle sensor harness connector B487 and RAS control unit harness connector B476.





2. Check continuity between each harness connector of rear wheel steering angle sensor harness connector B487 (A) and RAS control unit harness connector B476 (B).





OK or NG
OK - Rear wheel steering angle sensor malfunction. Replace rear wheel steering angle sensor.
NG - Harness between rear wheel steering angle sensor and RAS control unit open or shorted. Repair or replace harness.