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 power 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 power switch OFF ON.

CAUTION:
- Be sure to wait of 10 seconds after turning power switch OFF or ON.
- Set the vehicle to READY.
2.Repeat step 1 two or more times.
3.Perform self-diagnosis for "ABS".
Is DTC "C1143" detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the power 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 connector, and GO TO 2.

2. PERFORM SELF-DIAGNOSIS

With CONSULT
1.Turn the power switch OFF ON.

CAUTION:
- Be sure to wait of 10 seconds after turning power switch OFF or ON.
- Set the vehicle to READY.
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 power switch OFF.
2.Disconnect steering angle sensor harness connector.
3.Check the voltage between steering angle sensor harness connector and ground.





4.Turn the power switch ON.

CAUTION:
Never set the vehicle to READY.
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 power switch OFF.
2.Check the 10A fuse (#4).
3.Check the continuity and short circuit between steering angle sensor harness connector terminal (4) and
10A fuse (#4).
Is the inspection result normal?
YES- Perform trouble diagnosis for power switch ON power supply. Refer to "Wiring Diagram ON POWER SUPPLY -" On Power Supply.
NO- Repair or replace error-detected parts.

5. CHECK STEERING ANGLE SENSOR GROUND CIRCUIT

1.Turn the power 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". Refer to "Diagnosis Procedure" CAN.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace error-detected parts. Refer to "Precautions for Harness Repair" 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. Refer to "Reference Value" Pinout Values and Diagnostic Parameters.
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). Refer to "Removal and Installation" Removal And Installation.
NO- Replace steering angle sensor. Refer to "Removal and Installation" Service and Repair.