2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Optical Sensor System Inspection

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OPTICAL SENSOR INPUT SIGNAL 

    With CONSULT-II

    Select "BCM" on CONSULT-II. With "OPTICAL SENSOR" data monitor, check difference in the voltage when the optical sensor is illuminated and not illuminated.

    Illuminated 

    OPTICAL SENSOR: 3.0V or less 

    Not illuminated 

    OPTICAL SENSOR: 3.1V or more 

    NOTE: Optical sensor must be completely subjected to work lamp light. If the optical sensor is insufficiently illuminated, the measured value may not satisfy the standard.

    Without CONSULT-II

    GO TO 2.

    OK or NG 

    1. OK: INSPECTION END.
    2. NG: GO TO 2.
    Fig 1: Checking Optical Sensor Input Signal
    G03512589Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK OPTICAL SENSOR SIGNAL GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector and optical sensor connector.
    3. Check continuity (open circuit) between BCM harness connector M18 terminal 18 (P) and optical sensor harness connector M402 terminal 3 (P).

      18 (P) - 3 (P): Continuity should exist. 

    4. Check continuity (short circuit) between BCM harness connector M18 terminal 18 (P) and ground.

      18 (P) - Ground: Continuity should not exist. 

    Fig 2: Checking Optical Sensor Signal Ground Circuit
    G03512590Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair harness or connector.
  3. CHECK OPTICAL SENSOR SIGNAL CIRCUIT 
    1. Check continuity (open circuit) between BCM harness connector M20 terminal 58 (W/R) and optical sensor harness connector M402 terminal 4 (W/R).

      58 (W/R) - 4 (W/R): Continuity should exist. 

    2. Check continuity (short circuit) between BCM harness connector M20 terminal 58 (W/R) and ground.

      58 (W/R) - Ground: Continuity should not exist. 

    OK or NG 

    1. OK: Replace optical sensor. Refer to ."REMOVAL AND INSTALLATION OF OPTICAL SENSOR  ". Recheck sensor output with CONSULT-II. If NG, replace BCM. Refer to REMOVAL AND INSTALLATION OF BCM
    2. NG: Repair harness or connector.
    Fig 3: Checking Optical Sensor Signal Circuit
    G03512591Courtesy of NISSAN MOTOR CO., U.S.A.
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