2003 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE

Optical Sensor System Inspection

WARNING: This page is about a different car, the 2006 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.

    Fig 1: CONSULT-II Display - DATA MONITOR
    G04188601Courtesy of NISSAN MOTOR CO., U.S.A.

    Illuminated 

    OPTICAL SENSOR: 3.1V or more 

    Not illuminated 

    OPTICAL SENSOR: 0.6V or less 

    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 

    OK: Inspection End.

    NG: GO TO 2.

  2. CHECK OPTICAL SENSOR SIGNAL GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connectors and optical sensor connector.
    3. Check continuity (open circuit) between BCM harness connector M18 terminal 18 and optical sensor harness connector M402 terminal 3.

      18 - 3: Continuity should exist. 

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

      18 - Ground: Continuity should not exist. 

      5. Fig 2: Checking Continuity Between BCM Harness Connector M18 Terminal 18, Optical Sensor Harness Connector M402 Terminal 3 And Ground
      G04188602Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 3.

    NG: Repair harness or connector.

  3. CHECK OPTICAL SENSOR SIGNAL CIRCUIT 
    1. Check continuity (open circuit) between BCM harness connector M20 terminal 58 and optical sensor harness connector M402 terminal 4.

      58 - 4: Continuity should exist. 

    2. Check continuity (short circuit) between BCM harness connector M20 terminal 58 and ground.
      Fig 3: Checking Continuity Between BCM Harness Connector M20 Terminal 58, Optical Sensor Harness Connector M402 Terminal 4 And Ground
      G04188603Courtesy of NISSAN MOTOR CO., U.S.A.

      58 - Ground: Continuity should not exist. 

    OK or NG 

    OK: Replace optical sensor. Refer to "REMOVAL AND INSTALLATION ". Recheck sensor output with CONSULT-II. If NG, replace BCM. Refer to "BCM ".

    NG: Repair harness or connector.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.