Brake Control System

C1143 STEERING ANGLE SENSOR

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. CHECK SELF-DIAGNOSTIC RESULT

With CONSULT.
1.Turn ignition switch OFF to ON.
2.Perform self-diagnostic result.
Is DTC C1143 detected?
YES- Proceed to diagnosis procedure. Refer to "Diagnosis Procedure" .
NO- Inspection End.


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" [1][2]Antilock Brakes / Traction Control Systems.

1. CONNECTOR INSPECTION

1.Turn ignition switch OFF.
2.Disconnect ABS actuator and electric unit (control unit) and steering angle sensor connectors.
3.Check connectors and terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace as necessary.

2. CHECK STEERING ANGLE SENSOR MOUNTING CONDITION

Check steering angle sensor mounting condition.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace malfunctioning components.

3. CHECK STEERING ANGLE SENSOR POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect steering angle sensor connector.
3.Turn ignition switch ON.
4.Check voltage between steering angle sensor connector M54 terminal 4 and ground.





Is the inspection result normal?
YES- GO TO 5.
Revision: March 20122013 Infiniti JX
NO- GO TO 4.

4. CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect IPDM E/R connector E119.
3.Check continuity between steering angle sensor connector M54 terminal 4 and IPDM E/R connector E119
terminal 35.





4.Check continuity between steering angle sensor connector M54 terminal 4 and ground.





Is the inspection result normal?
YES- Perform trouble diagnosis for ignition power supply.
NO- Repair or replace malfunctioning components.

5. CHECK STEERING ANGLE SENSOR GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Check continuity between steering angle sensor connector M54 terminal 1 and ground.





Is the inspection result normal?
YES- GO TO 6.
NO- Repair or replace malfunctioning components.

6. CHECK CAN COMMUNICATION LINE

Check "STRG BRANCH LINE CIRCUIT". Refer to "Diagnosis Procedure" CAN System (Type 1) (Type 1) or "Diagnosis Procedure" CAN System (Type 2) (Type 2).
Is the inspection result normal?
YES- Replace ABS actuator and electric unit (control unit). Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace malfunctioning components.
Revision: March 20122013 Infiniti JX