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Home >> Infiniti >> 2021 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Brake Control System (DTCS) >> Abs [Abs Actuator And Electric Unit (Control Unit)] >> DTC C1111: Abs Motor, Motor Relay System >> DTC Diagnosis Procedure
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DTC Diagnosis Procedure

  1. CHECK CONNECTOR 
    1. Turn the ignition switch OFF.
    2. Check the ABS actuator and electric unit (control unit) harness connector for disconnection or looseness.

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair / replace harness or connector, securely lock the connector, and GO TO 2.

  2. PERFORM SELF-DIAGNOSIS 

    SYMBOL With CONSULT

    1. Turn the ignition switch OFF -> ON, and wait 30 seconds.
    2. Drive the vehicle at approximately 50 km/h (31 MPH) or more for approximately 2 minutes.
      NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
    3. Stop the vehicle.
    4. Turn the ignition switch OFF.
      NOTE: Wait at least 10 seconds after turning ignition switch OFF.
    5. Start the engine.
      NOTE: Wait at least 10 seconds after start the engine.
    6. Perform self-diagnosis for "ABS".

    Is DTC "C1111" detected?

    YES

    GO TO 3.

    NO

    INSPECTION END

  3. 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 circuit. Refer to Diagnosis Procedure .

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair / replace harness, connector, terminal, fuse, or fusible link, and GO TO 4.

  4. ERASE SELF-DIAGNOSIS RESULT (1) 

    SYMBOL With CONSULT

    1. Drive the vehicle at approximately 50 km/h (31 MPH) or more for approximately 2 minutes.
      NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
    2. Stop the vehicle.
    3. Erase self-diagnosis result for "ABS".
    4. Turn the ignition switch OFF -> ON -> OFF.
      NOTE: Wait at least 10 seconds after turning ignition switch OFF or ON.

    INSPECTION END

  5. CHECK MOTOR/ACCUMULATOR ASSEMBLY 
    1. Turn the ignition switch OFF.
    2. Check the motor/accumulator assembly. Refer to HYDRAULIC BOOSTER ASSEMBLY : Inspection .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Replace motor/accumulator assembly. Refer to HYDRAULIC BOOSTER ASSEMBLY : Removal & Installation .

  6. CHECK TERMINAL 

    Check the ABS actuator and electric unit (control unit) terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES

    Replace the ABS actuator and electric unit (control unit). Refer to ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) : Removal & Installation .

    NO

    Repair / replace harness, connector, or terminal, and GO TO 7.

  7. ERASE SELF-DIAGNOSIS RESULT (2) 

    SYMBOL With CONSULT

    1. Drive the vehicle at approximately 50 km/h (31 MPH) or more for approximately 2 minutes.
      NOTE: Vehicle must be driven after repair or replacement to erase the previous DTCs.
    2. Stop the vehicle.
    3. Erase self-diagnosis result for "ABS".
    4. Turn the ignition switch OFF -> ON -> OFF.
      NOTE: Wait at least 10 seconds after turning ignition switch OFF or ON.

    INSPECTION END

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