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 -> ON.

CAUTION:
- Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
- Set the vehicle to READY/Start the engine.
2.Repeat step 1 two or more times.
3.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 ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.
3.Check 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 connector, and GO TO 2.

2. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Turn the ignition switch OFF -> ON.

CAUTION:
- Be sure to wait of 10 seconds after turning ignition switch OFF or ON.
- Set the vehicle to READY/Start the engine.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
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 voltage between steering angle sensor harness connector and ground.





4.Turn the ignition switch ON.

CAUTION:
Never set the vehicle to READY/Never start the engine.
5.Check 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 IGNITION POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Check 10A fuse (#1).
3.Disconnect fuse block (J/B) harness connector.
4.Check continuity between ABS actuator and electric unit (control unit) harness connector and fuse block (J/B).





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.
NO- Repair or replace error-detected parts.

5. 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 6.
NO- Repair or replace error-detected parts.

6. CHECK TERMINAL

1.Check steering angle sensor pin terminals for damage or loose connection with harness connector.
2.Check use block (J/B) 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 "STRG BRANCH LINE CIRCUIT". CAN.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace error-detected parts. CAN.

8. CHECK DATA MONITOR

With CONSULT
1."ABS", "DATA MONITOR" and "STR ANGLE SIG" according to this order.
2.Check that the indication changes with the steering angle when the steering wheel is turned left/right from the neutral position. Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). Removal and Installation.
NO- Replace steering angle sensor. Service and Repair.