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Optical Sensor System Inspection

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OUTPUT SIGNAL 

    Select "BCM" in CONSULT-II. Using "OPTICAL SENSOR" data from "DATA MONITOR", check difference in the voltage when the auto light sensor is illuminated and not illuminated.

    Illuminated 

    Optical sensor : 3.1V or more 

    Not illuminated 

    Optical sensor : 0.6V or less 

    CAUTION: Optical sensor must be securely subjected to work lamp light. If the optical sensor is insufficiently illuminated, the measured value may not satisfy the standard.
    Fig 1: Displaying DATA MONITOR Screen
    G03112710Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK >>INSPECTION END. 
    2. NG >>GO TO 2. 
  2. CHECK POWER SUPPLY CIRCUIT CONTINUITY 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector and optical sensor connector.
    3. Check harness continuity (open circuit) between harness connector of BCM and harness connector of optical sensor.
      BCM AND OPTICAL SENSOR CONTINUITY CONDITIONS (OPEN CIRCUIT)

      Terminals Continuity
      BCM Optical sensor
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M2 45(P) M63 1(P) Yes
      Fig 2: Checking Power Supply Circuit Continuity
      G03112711Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check harness continuity (short circuit) between harness connector of BCM and ground.
      BCM AND GROUND CONTINUITY CONDITIONS (SHORT CIRCUIT)

      Terminals Continuity
      BCM Ground
      Connector Terminal (Wire color)
      M2 45(P) No

    OK or NG

    1. OK >>GO TO 3. 
    2. NG >>Repair harness or connector. 
  3. CHECK OUTPUT CIRCUIT CONTINUITY 
    1. Check harness continuity (open circuit) between harness connector of BCM and harness connector of optical sensor.
      BCM AND OPTICAL SENSOR CONTINUITY CONDITIONS (OPEN CIRCUIT)

      Terminals Continuity
      BCM Optical sensor
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M2 38 (Y/PU) M63 2 (Y/PU) Yes
      Fig 3: Checking Output Circuit Continuity
      G03112712Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check harness continuity (short circuit) between harness connector of BCM and ground.
      BCM AND GROUND CONTINUITY CONDITIONS (SHORT CIRCUIT)

      Terminals Continuity
      BCM Ground
      Connector Terminal (Wire color)
      M2 38 (Y/PU) No

    OK or NG

    1. OK >>GO TO 4. 
    2. NG >>Repair harness or connector. 
  4. CHECK GROUND CIRCUIT CONTINUITY 
    1. Check harness continuity (open circuit) between harness connector of BCM and harness connector of optical sensor.
      BCM AND HARNESS CONNECTOR OF OPTICAL SENSOR CONTINUITY CONDITIONS (OPEN CIRCUIT)

      Terminals Continuity
      BCM Optical sensor
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M3 53 (B) M63 3 (B) Yes
      Fig 4: Checking Ground Circuit Continuity
      G03112713Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check harness continuity (short circuit) between harness connector of BCM and ground.
      BCM AND GROUND CONTINUITY CONDITIONS (SHORT CIRCUIT)

      Terminals Continuity
      BCM Ground
      Connector Terminal (Wire color)
      M3 53 (B) No

    OK or NG

    1. OK >>GO TO 5. 
    2. NG >>Repair harness or connector. 
  5. CHECK SENSOR VOLTAGE 
    1. Connect BCM connector.
    2. Turn ignition switch ON.
    3. Check voltage between harness connector of BCM and ground.
      BCM AND GROUND VOLTAGE SPECIFICATION

      Terminals Voltage
      BCM Ground
      Connector Terminal (Wire color)
      M2 45 (P) Approx.5V
      Fig 5: Checking Voltage Between Harness Connector Of BCM And Ground
      G03112714Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK >>Replace the optical sensor.
    2. NG >>Replace BCM. Refer to REMOVAL AND INSTALLATION OF BCM in BODY CONTROL MODULES ARTICLE. .
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