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Home >> Infiniti >> 2017 >> Q50 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 195 (Brake Control System (With VDC) (Diagnostic Trouble Codes (DTCS) C1113-U110D And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY (1)

    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      + - Voltage
      ABS actuator and electric unit (control unit)
      Connector Terminal
      E24 16 Ground Approx. 0 V
    4. Turn the ignition switch ON
      NOTE:

      Set the vehicle to READY/Start the engine.

    5. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      + - Voltage
      ABS actuator and electric unit (control unit)
      Connector Terminal
      E24 16 Ground 10 - 16 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY CIRCUIT

    1. Turn the ignition switch OFF.
    2. Check the 10A fuse (#22).
    3. Disconnect fuse block (J/B) harness connector.
    4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and fuse block (J/B) harness connector.
      ABS actuator and electric unit (control unit) Fuse block (J/B) Continuity
      Connector Terminal Connector Terminal
      E24 16 E64 1E Existed
    5. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
      ABS actuator and electric unit (control unit) - Continuity
      Connector Terminal
      E24 16 Ground No existed

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for ignition power supply.

    NO 

    Repair / replace harness, connector, or fuse.

  3. CHECK MOTOR AND MOTOR RELAY POWER SUPPLY

    1. Turn the ignition switch OFF.
    2. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      + - Voltage
      ABS actuator and electric unit (control unit)
      Connector Terminal
      E24 1 Ground 10 - 16 V

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT

    1. Turn the ignition switch OFF.
    2. Check the 50A fusible link (#N).
    3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal (1) and 50A fusible link (#N).

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for 12V battery power supply.

    NO 

    Repair / replace harness, connector, or fusible link.

  5. CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY

    1. Turn the ignition switch OFF.
    2. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      + - Voltage
      ABS actuator and electric unit (control unit)
      Connector Terminal
      E24 2 Ground 10 - 16 V

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    GO TO STEP 6  .

  6. CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY CIRCUIT

    1. Turn the ignition switch OFF.
    2. Check the 30A fusible link (#L).
    3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal (2) and 30A fusible link (#L).

    Is the inspection result normal?

    YES 

    Perform trouble diagnosis for 12V battery power supply.

    NO 

    Repair / replace harness, connector, or fusible link.

  7. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT

    Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.

    ABS actuator and electric unit (control unit) - Continuity
    Connector Terminal
    E24 3 Ground Existed
    4

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair / replace harness, connector, or terminal.

  8. CHECK TERMINAL

    1. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
    2. Check the fuse block (J/B) pin 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 REMOVAL AND INSTALLATION .

    NO 

    Repair / replace harness, connector, or terminal.

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