C1143

C1143 STEERING ANGLE SENSOR





DTC Logic

DTC DETECTION LOGIC






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




Diagnosis Procedure
1.CHECK STEERING ANGLE SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect steering angle sensor harness connector.
3. Check voltage between steering angle sensor harness connector and ground.





4. Turn the ignition switch ON.

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





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Check 10 A fuse (#46).
3. Disconnect IPDM E/R harness connector.
4. Check continuity between steering angle sensor harness connector and IPDM E/R harness connector.





5. Check continuity between steering angle sensor harness connector and ground.





Is the inspection result normal?
YES - Perform trouble diagnosis for ignition power supply. Ignition Power Supply, "Wiring Diagram - IGNITION
POWER SUPPLY -".
NO - Repair or replace error-detected parts.
3.CHECK STEERING ANGLE SENSOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Check continuity between steering angle sensor harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace error-detected parts.
4.CHECK TERMINAL
- Check steering angle sensor pin terminals for damage or loose connection with harness connector.
- Check IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace error-detected parts.
5.CHECK CAN COMMUNICATION LINE
Check "STRG BRANCH LINE CIRCUIT". CAN.
Is the inspection result normal?
YES - Replace ABS actuator and electric unit (control unit). Removal And Installation.
NO - Repair or replace error-detected parts. Precaution For Harness Repair.