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 C1143.
NO - Inspection End.




Diagnosis Procedure
Regarding Wiring Diagram information, refer to Coupe or VDC/TCS/ABS.
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 VDC/TCS/ABS.
Is the inspection result normal?
YES - Inspection End.
NO - GO TO 2
2.CHECK STEERING ANGLE SENSOR HARNESS
1. Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.
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 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.
- Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".
3.CHECK DATA MONITOR
1. Turn ignition switch OFF.
2. Connect the steering angle sensor and ABS actuator and electric unit (control unit) connectors.
3. Select "STR ANGLE SIG" in "Data Monitor" and check steering angle sensor signal.





Is the inspection result normal?
YES - Perform self-diagnosis.
NO - Replace spiral cable (steering angle sensor) and adjust neutral position of steering angle sensor. Refer to Service and Repair.
- Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".




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 C1143.



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 Service and Repair.
- END