C1143
C1143 STEERING ANGLE SENSORDescription
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
C1143:
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
1. Turn the ignition switch ON.
2. Perform ABS actuator and electric unit (control unit) self-diagnosis.
Is DTC "C1143" detected?
YES >> Proceed to diagnosis procedure. Refer to "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) connector.
3. Disconnect steering angle sensor connector.
4. Check terminal for deformation, disconnection, looseness, etc.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace damaged parts.
2.CHECK STEERING ANGLE SENSOR HARNESS
1. Turn ignition switch ON.
CAUTION:
Never start the engine.
2. Check the voltage between steering angle sensor harness connector and ground.
3. Turn the ignition switch OFF.
4. Check the continuity between steering angle sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK DATA MONITOR
1. Connect steering angle sensor connector and ABS actuator and electric unit (control unit) connector.
2. Check steering angle sensor signal. Refer to "Component Inspection".
Is the inspection result normal?
YES >> Replace ABS actuator and electric unit (control unit).
NO >> Replace steering angle sensor and adjust neutral position of steering angle sensor.
Component Inspection
1.CHECK DATA MONITOR
Select "STR ANGLE SIG" in "DATA MONITOR" and check steering angle sensor signal.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to diagnosis procedure. Refer to "Diagnosis Procedure".
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). Refer to BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION: Description". Testing and Inspection
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