C1143

C1143, C1144 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. PRECONDITIONING

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

2. DTC REPRODUCTION PROCEDURE

1.Turn the ignition switch OFF to ON.
2.Perform self-diagnosis for "ABS" with CONSULT.
Is DTC "C1143" or "C1144" detected?
YES- Proceed to diagnosis procedure. .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK VEHICLE STATE

Check vehicle for any suspension/steering misalignment or damage.
Is the inspection result normal?
YES- GO TO 2.
NO- Correct any damage found.

2. CHECK CONNECTOR

1.Turn the ignition switch OFF.
2.Disconnect steering angle sensor harness connector.
3.Check terminal for deformation, disconnection, looseness, etc.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace error-detected parts.

3. CHECK STEERING ANGLE SENSOR POWER SUPPLY

1.Check voltage between steering angle sensor harness connector and ground.





2.Turn the ignition switch ON.

CAUTION:
Never start the engine.
3.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 POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Check 10 A fuse (1).
3.Check continuity and short circuit between steering angle sensor harness connector terminal (1) and 10 A
fuse (1).
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.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 CAN COMMUNICATION LINE

Check "STRG BRANCH LINE CIRCUIT". CAN.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). VDC/TCS/ABS.
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 ABS actuator and electric unit (control unit) or steering angle sensor and removing steering angle sensor. Refer to BRC76, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".
- END