C1143

C1143 STEERING ANGLE SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Turn the ignition switch OFF to ON.
2.Perform self-diagnosis for "ABS".
Is DTC "C1143" detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the ignition switch OFF.
2.Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
3.Check the steering angle sensor harness connector for disconnection or looseness.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace error-detected parts, securely lock the harness connector, and GO TO 2.

2. PERFORM SELF-DIAGNOSIS

Perform self-diagnosis for "ABS" again.
Is DTC "C1143" detected?
YES- GO TO 3.
NO- INSPECTION END

3. CHECK STEERING ANGLE SENSOR POWER SUPPLY

1.Turn the ignition switch OFF.
2.Disconnect steering angle sensor harness connector.
3.Check the voltage between steering angle sensor harness connector and ground.





4.Turn the ignition switch ON.

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





Is the inspection result normal?
YES- GO TO 5.
NO- GO TO 4.

4. CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Check the 10A fuse (#3).
3.Check the continuity and short circuit between steering angle sensor harness connector terminal (4) and
10A fuse (#3).
Is the inspection result normal?
YES- Perform trouble diagnosis for ignition power supply. Ignition Power Supply.
NO- Repair or replace error-detected parts.

5. CHECK STEERING ANGLE SENSOR GROUND CIRCUIT

1.Turn the ignition switch OFF.
2.Check the continuity between steering angle sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace error-detected parts.

6. CHECK TERMINAL

Check the steering angle sensor pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- GO TO 7.
NO- Repair or replace error-detected parts.

7. CHECK CAN COMMUNICATION LINE

Check the "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 VDC.