Nissan Sentra Service Manual: C1143 Steering angle sensor

Nissan Sentra Service Manual / Brakes / Brake control system / Dtc/circuit diagnosis / C1143 Steering angle sensor

DTC Logic

DTC DETECTION LOGIC

DTC	Display Item	Malfunction detected condition	Possible causes
C1143	ST ANG SEN CIRCUIT	When a malfunction is detected in steering angle sensor.	Harness or connector Steering angle sensor ABS actuator and electric unit (control unit) Fuse Ignition power supply system CAN communication line

DTC CONFIRMATION PROCEDURE

1.CHECK SELF DIAGNOSTIC RESULT

With CONSULT

Turn ignition switch ON.
Perform self diagnostic result.

Is DTC C1143 detected? YES >> Proceed to diagnosis procedure. Refer to BRC-80, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

Regarding Wiring Diagram information, refer to BRC-44, "Wiring Diagram".

1.CONNECTOR INSPECTION

Turn ignition switch OFF.
Disconnect ABS actuator and electric unit (control unit) and steering angle sensor connectors.
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

Turn ignition switch OFF.
Disconnect steering angle sensor connector.
Turn ignition switch ON.
Check voltage between steering angle sensor connector M14 terminal 4 and ground.

Is the inspection result normal?

Is the inspection result normal? Yes >> go to 4.

No >> check the following:

Repair or replace harness.
Fuse

4.Check steering angle sensor ground circuit

Turn ignition switch off.
Check continuity between steering angle sensor connector m14 terminal 1 and ground.

Is the inspection result normal?

Is the inspection result normal? Yes >> go to 5.

No >> repair or replace malfunctioning components.

5.Check can communication line

Check вЂњstrg branch line circuitвЂќ. Refer to lan-66, "diagnosis procedure" (type 1) or lan-79, "diagnosis procedure" (type 2).

Is the inspection result normal? Yes >> replace abs actuator and electric unit (control unit). Refer to brc-110, "removal and installation".

No >> repair or replace malfunctioning components.

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