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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Brake Control System (DTC/Circuit Diagnosis) (Without ICC) (Except Hybrid)) >> DTC/Circuit Diagnosis >> DTC C1143: Steering Angle Sensor >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. ADJUST THE NEUTRAL POSITION OF STEERING ANGLE SENSOR

    CONON With CONSULT

    Perform neutral position adjustment of steering angle sensor. Refer to DESCRIPTION .

    GO TO STEP 2  .

  2. PERFORM SELF-DIAGNOSIS (1)

    CONON With CONSULT

    1. Turn the ignition switch OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF.

    2. Start the engine.
      NOTE:

      Wait at least 10 seconds after starting the engine.

    3. Perform "Self Diagnostic Result" of "ABS".

    Is DTC "C1143" detected?

    YES - 1 

    "C1143" is displayed as "CRNT": GO TO STEP 3  .

    YES - 2 

    "C1143" is displayed as "PAST": Inspection End (Erase "Self Diagnostic Result" of "ABS").

    NO 

    Inspection End.

  3. CHECK CONNECTOR

    1. Turn the ignition 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 STEP 5  .

    NO 

    Repair / replace harness or connector, securely lock the connector, and GO TO STEP 4  .

  4. PERFORM SELF-DIAGNOSIS (2)

    CONON With CONSULT

    1. Turn the ignition switch OFF.
      NOTE:

      Wait at least 10 seconds after turning ignition switch OFF.

    2. Start the engine.
      NOTE:

      Wait at least 10 seconds after starting the engine.

    3. Perform "Self Diagnostic Result" of "ABS".

    Is DTC "C1143" detected?

    YES 

    GO TO STEP 5  .

    NO 

    Inspection End.

  5. CHECK STEERING ANGLE SENSOR POWER SUPPLY

    1. Turn the ignition switch OFF.
    2. Disconnect steering angle sensor harness connector.
    3. Check the voltage between steering angle sensor harness connector and ground.
      Steering angle sensor - Voltage
      (Approx.)
      Connector Terminal
      M54 4 Ground 0 V
    4. Turn the ignition switch ON.
      NOTE:

      Start the engine.

    5. Check the voltage between steering angle sensor harness connector and ground.
      Steering angle sensor - Voltage
      (Approx.)
      Connector Terminal
      M54 4 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 6  .

  6. CHECK STEERING ANGLE SENSOR POWER SUPPLY CIRCUIT

    1. Turn the ignition switch OFF.
    2. Check fuse 49 (10A).
    3. Disconnect IPDM E/R harness connector.
    4. Check the continuity between steering angle sensor harness connector and IPDM E/R harness connector.
      Steering angle sensor IPDM E/R Continuity
      Connector Terminal Connector Terminal
      M54 4 E119 35 Yes
    5. Check the continuity between steering angle sensor harness connector and ground.
      Steering angle sensor - Continuity
      Connector Terminal
      M54 4 Ground No

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for ignition power supply.

    NO 

    Repair / replace harness, connector, or fuse.

  7. CHECK STEERING ANGLE SENSOR GROUND CIRCUIT

    1. Turn the ignition switch OFF.
    2. Check the continuity between steering angle sensor harness connector and ground.
      Steering angle sensor - Continuity
      Connector Terminal
      M54 1 Ground Yes

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair / replace harness or connector.

  8. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT

    Check the ABS actuator and electric unit (control unit) power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Repair / replace harness, connector, fuse, or fusible link.

  9. CHECK TERMINAL

    1. Check the steering angle sensor pin terminals for damage or loose connection with harness connector.
    2. Check the IPDM E/R pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES 

    GO TO STEP 10  .

    NO 

    Repair / replace harness, connector, or terminal.

  10. CHECK CAN COMMUNICATION LINE

    Check the CAN communication line. Refer to TROUBLE DIAGNOSIS FLOW CHART .

    Is the inspection result normal?

    YES 

    GO TO STEP 11  .

    NO 

    Repair / replace harness or connector.

  11. CHECK DATA MONITOR

    CONON With CONSULT

    1. Select "DATA MONITOR" of "ABS", check "STR ANGLE SIG".
    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 .

    Is the inspection result normal?

    YES 

    Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .

    NO 

    Replace the steering angle sensor. Refer to REMOVAL AND INSTALLATION .

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