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 CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
1. Turn the ignition switch ON.
2. Perform self-diagnosis for "ABS" with CONSULT-III.
Is DTC "C1143" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




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





2. Turn 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.
- TYPE A: Ignition Power Supply.
- TYPE B: Ignition Power Supply.
NO - Repair or replace error-detected 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 error-detected parts.
5.CHECK DATA LINE
Check "STRG BRANCH CIRCUIT". CAN.
Is the inspection result normal?
YES - Replace ABS actuator and electric unit (control unit).
NO - Repair or replace error-detected 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). Description.
- END