LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System -- G37 Coupe >> DTC/Circuit Diagnosis >> Optical Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK OPTICAL SENSOR POWER SUPPLY INPUT
    1. Turn the ignition switch ON.
    2. Turn the lighting switch AUTO.
    3. Check the voltage between the optical sensor harness connector and the ground.
      VOLTAGE REFERENCE CHART

      Terminals Voltage (Approx.)
      (+) (-)
      Optical sensor Ground
      Connector Terminal
      M94 1 5 V

      Is the measurement value normal? 

      YES: GO TO 2.

      NO: GO TO  4.

  2. CHECK OPTICAL SENSOR GROUND INPUT

    Check the voltage between the optical sensor harness connector and the ground.

    VOLTAGE REFERENCE CHART

    Terminals Voltage (Approx.)
    (+) (-)
    Optical sensor Ground
    Connector Terminal
    M94 3 0 V

    Is the measurement value normal? 

    YES: GO TO 3.

    NO: GO TO  6.

  3. CHECK OPTICAL SENSOR SIGNAL OUTPUT

    With illuminating the optical sensor, check the voltage between the optical sensor harness connector and the ground.

    VOLTAGE REFERENCE CHART

    Terminals Condition Voltage (Approx.)
    (+) (-)
    Optical sensor Ground Optical sensor
    Connector Terminal
    M94 2 When illuminating 3.1 V or more (1)
    When shutting off light 0.6 V or less
    (1) Illuminate the optical sensor. The value may be less than the standard if brightness is weak.

    Is the measurement value normal? 

    YES: GO TO  7.

    NO: Replace the optical sensor.

  4. CHECK OPTICAL SENSOR OPEN CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect the optical sensor connector and BCM connector.
    3. Check continuity between the optical sensor harness connector and the BCM harness connector.
      CONTINUITY REFERENCE CHART

      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M94 1 M123 138 Existed

      Does continuity exist? 

      YES: GO TO 5.

      NO: Repair the harnesses or connectors.

  5. CHECK OPTICAL SENSOR SHORT CIRCUIT

    Check the continuity between the optical sensor harness connector and the ground.

    CONTINUITY REFERENCE CHART

    Optical sensor Ground Continuity
    Connector Terminal
    M94 1 Not existed

    Does continuity exist? 

    YES: Repair the harnesses or connectors.

    NO: Replace BCM.

  6. CHECK OPTICAL SENSOR GROUND OPEN CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect the optical sensor connector and BCM connector.
    3. Check continuity between the optical sensor harness connector and the BCM harness connector.
      CONTINUITY REFERENCE CHART

      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M94 3 M123 137 Existed

      Does continuity exist? 

      YES: Replace BCM.

      NO: Repair the harnesses or connectors.

  7. CHECK OPTICAL SENSOR SIGNAL OPEN CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect the optical sensor connector and BCM connector.
    3. Check continuity between the optical sensor harness connector and the BCM harness connector.
      CONTINUITY REFERENCE CHART

      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M94 2 M123 113 Existed

      Does continuity exist? 

      YES: GO TO 8.

      NO: Repair the harnesses or connectors.

  8. CHECK OPTICAL SENSOR SHORT CIRCUIT

    Check the continuity between the optical sensor harness connector and the ground.

    CONTINUITY REFERENCE CHART

    Optical sensor Ground Continuity
    Connector Terminal
    M94 2 Not existed

    Does continuity exist? 

    YES: Repair the harnesses or connectors.

    NO: Replace BCM.

scientia non olet · About LEMON Manuals