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Home >> Infiniti >> 2012 >> G25 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Exterior Lighting System) >> DTC/Circuit Diagnosis >> Optical Sensor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OPTICAL SENSOR POWER SUPPLY INPUT
    1. Turn power switch ON.
    2. Turn lighting switch AUTO.
    3. Check voltage between optical sensor harness connector and ground.
      TERMINALS VOLTAGE REFERENCE CHART

      (+) (-) Voltage (Approx.)
      Optical sensor
      Connector Terminal
      M16 1 Ground 5 V

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: GO TO  4.

  2. CHECK OPTICAL SENSOR GROUND INPUT

    Check voltage between optical sensor harness connector and ground.

    TERMINALS VOLTAGE REFERENCE CHART

    (+) (-) Voltage (Approx.)
    Optical sensor
    Connector Terminal
    M16 3 Ground 0 V

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: GO TO  6.

  3. CHECK OPTICAL SENSOR SIGNAL OUTPUT

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

    TERMINALS VOLTAGE REFERENCE CHART

    (+) (-) Condition Voltage (Approx.)
    Optical sensor
    Connector Terminal
    M16 2 Ground Optical sensor 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 inspection result normal? 

    YES: GO TO  7.

    NO: Replace the optical sensor.

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

      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M16 1 M68 17 Existed

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair or replace harness.

  5. CHECK OPTICAL SENSOR SHORT CIRCUIT

    Check continuity between optical sensor harness connector and ground.

    TERMINALS CONTINUITY REFERENCE CHART

    Optical sensor Ground Continuity
    Connector Terminal
    M16 1 Not existed

    Is the inspection result normal? 

    YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair or replace harness.

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

      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M16 3 M68 18 Existed

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

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

      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M16 2 M68 14 Existed

      Is the inspection result normal? 

      YES: GO TO 8.

      NO: Repair or replace harness.

  8. CHECK OPTICAL SENSOR SHORT CIRCUIT

    Check continuity between optical sensor harness connector and ground.

    TERMINALS CONTINUITY REFERENCE CHART

    Optical sensor Ground Continuity
    Connector Terminal
    M16 2 Not existed

    Is the inspection result normal? 

    YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair or replace harness.

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