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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System (VDC/TCS/Abs) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY 
    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.
      ABS actuator and electric unit (control unit) - Voltage
      Connector Terminal
      E41 28 Ground Approx. 0 V
    4. Turn the ignition switch ON.
      CAUTION: Never start the engine.
    5. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      ABS actuator and electric unit (control unit) - Voltage
      Connector Terminal
      E41 28 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 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 (#45).
    3. Disconnect IPDM E/R harness connector.
    4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R harness connector.
      ABS actuator and electric unit (control unit) IPDM E/R Continuity
      Connector Terminal Connector Terminal
      E41 28 E5 25 Existed

      Is the inspection result normal? 

      YES: Perform the trouble diagnosis for ignition power supply circuit. Refer to "WIRING DIAGRAM - IGNITION POWER SUPPLY - ".

      NO: Repair or replace error-detected parts.

  3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) BATTERY POWER SUPPLY 
    1. Turn the ignition switch OFF.
    2. Check the 50A fusible link (#N) and 30A fusible link (#M).
    3. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
      ABS actuator and electric unit (control unit) - Voltage
      Connector Terminal
      E41 2 Ground Battery voltage
      3

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Perform the trouble diagnosis for battery power supply circuit. Refer to "WIRING DIAGRAM - BATTERY POWER SUPPLY - ".

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

    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
    E41 1 Ground Existed
    4

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Repair or replace error-detected parts.