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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Exterior Lighting System (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Optical Sensor >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

  1. CHECK OPTICAL SENSOR POWER SUPPLY INPUT

    1. Turn ignition switch ON.
    2. Turn lighting switch AUTO.
    3. Check voltage between optical sensor harness connector and ground.
      + - Voltage
      Optical sensor
      Connector Terminal
      M91 1 Ground 4.65 - 5.5 V

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 4  .

  2. CHECK OPTICAL SENSOR GROUND INPUT

    Check voltage between optical sensor harness connector and ground.

    + - Voltage
    Optical sensor
    Connector Terminal
    M91 3 Ground 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 6  .

  3. CHECK OPTICAL SENSOR SIGNAL OUTPUT

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

    + - Condition Voltage
    (Approx.)
    Optical sensor
    Connector Terminal
    M91 2 Ground Optical sensor When illuminating 3.1 V or more *
    When shutting off light 0.6 V or less

    * : Illuminate the optical sensor. The value may be less than the standard if brightness is weak.

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Replace optical sensor. Refer to REMOVAL AND INSTALLATION .

  4. CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT (OPEN)

    1. Turn ignition switch OFF.
    2. Disconnect optical sensor connector and BCM connector.
    3. Check continuity between optical sensor harness connector and BCM harness connector.
      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M91 1 M13 3 Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace harness.

  5. CHECK OPTICAL SENSOR POWER SUPPLY CIRCUIT (SHORT)

    Check continuity between optical sensor harness connector and ground.

    Optical sensor - Continuity
    Connector Terminal
    M91 1 Ground 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 CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect optical sensor connector and BCM connector.
    3. Check continuity between optical sensor harness connector and BCM harness connector.
      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M91 3 M13 17 Existed

    Is the inspection result normal?

    YES 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

  7. CHECK OPTICAL SENSOR SIGNAL CIRCUIT (OPEN)

    1. Turn ignition switch OFF.
    2. Disconnect optical sensor connector and BCM connector.
    3. Check continuity between optical sensor harness connector and BCM harness connector.
      Optical sensor BCM Continuity
      Connector Terminal Connector Terminal
      M91 2 M13 4 Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace harness.

  8. CHECK OPTICAL SENSOR SIGNAL CIRCUIT (SHORT)

    Check continuity between optical sensor harness connector and ground.

    Optical sensor - Continuity
    Connector Terminal
    M91 2 Ground Not existed

    Is the inspection result normal?

    YES 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

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