C1143

C1143, C1144 STEERING ANGLE SENSOR





Description
The steering angle sensor detects the rotation amount, angular velocity and direction of the steering wheel, and transmits the data to the ABS actuator and electric unit (control unit) via CAN communication.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.





Is above displayed on the self-diagnosis display?
YES - Proceed to diagnosis procedure. Refer to "Diagnosis Procedure".
NO - Inspection End




Diagnosis Procedure
1. CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminals.
4. Reconnect connector and perform self-diagnosis. Refer to Scan Tool Testing and Procedures.
Is any item displayed on the self-diagnosis display?
YES - GO TO 2
NO - Poor connection of connector terminals. Repair or replace connector.
2. CHECK STEERING ANGLE SENSOR HARNESS





1. Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.
2. Turn ignition switch OFF.
3. Disconnect steering angle sensor connector.
4. Check continuity between steering angle sensor harness connector M53 terminal 1 and ground.










5. Turn ignition switch ON.
6. Check voltage between steering angle sensor connector M53 terminal 4 and ground.





Is the inspection result normal?
YES - GO TO 3
NO - Repair or replace malfunctioning components.
3. CHECK DATA MONITOR
1. Turn ignition switch OFF.
2. Connect steering angle sensor connector and ABS actuator and electric unit (control unit) connector.
3. Select "STR ANGLE SIG" in "Data Monitor" and check steering angle sensor signal.





Is the inspection result normal?
YES - Replace ABS actuator and electric unit (control unit). Refer to Removal And Installation.
NO - Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to Service and Repair and "Special Repair Requirement".




Component Inspection
1. CHECK DATA MONITOR
Select "STR ANGLE SIG" in "DATA MONITOR" and check steering angle sensor signal.





Is the inspection result normal?
YES - Inspection End
NO - Go to diagnosis procedure. Refer to "Diagnosis Procedure".




Special Repair Requirement
1. ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actuator and electric unit (control unit). Refer to Special Repair Requirement.
END