C1143

C1143 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 DETECTION LOGIC:

DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
1. Turn the ignition switch ON.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis.
Is DTC "C1143" detected?
YES - Proceed to diagnosis procedure. Refer to C1143.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Disconnect steering angle sensor connector.
4. Check terminal for deformation, disconnection, looseness, etc.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace damaged parts.
2.CHECK STEERING ANGLE SENSOR POWER SUPPLY
1. Check the voltage between steering angle sensor harness connector and ground.





2. Turn the ignition switch ON.

CAUTION:
Never start the engine.
3. Check the voltage between steering angle sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 3.
3.CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 10 A fusible link (45).
3. Disconnect IPDM E/R harness connector.
4. Check continuity between steering angle sensor harness connector and IPDM E/R harness connector.





Is the inspection result normal?
YES - Perform the trouble diagnosis for ignition power supply circuit.
NO - Repair or replace damaged parts.
4.CHECK STEERING ANGLE SENSOR GROUND
Check continuity between steering angle sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace damaged parts.
5.CHECK DATA LINE
Check "STRG BRANCH LINE CIRCUIT". Refer to CAN.
Is the inspection result normal?
YES - Replace ABS actuator and electric unit (control unit).
NO - Repair or replace damaged parts.




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 steering angle sensor or the ABS actuator and electric unit (control unit). Refer to Description.
- END