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All Step Lamps Do Not Operate

WARNING: This page is about a different car, the 2008 Infiniti FX45 and 2008 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK EACH DOOR SWITCH 

    CONSULT-III DATA MONITOR

    1. Select "INT LAMP" of BCM data monitor item.
    2. Check that switches listed in display item list turn ON-OFF linked with switch operation.
    EACH DOOR SWITCH

    Switch name CONSULT screen
    Driver side door switch DOOR SW - DR
    Passenger side door switch DOOR SW - AS
    Rear RH side door switch DOOR SW - RR
    Rear LH side door switch DOOR SW - RL

    OK or NG 

    OK: GO TO 2.

    NG: Inspect malfunctioning switch system.

  2. CHECK STEP LAMP INPUT 
    1. Turn ignition switch OFF.
    2. Check voltage between front step lamp (driver side and passenger side) harness connector and ground.

      1 - Ground : Battery voltage. 

        (+) (-) Voltage (Approx.)
      Front step lamp connector Terminal
      Driver side D9 1 Ground Battery voltage
      Passenger side D39 1
      Fig 1: Identifying Voltage Between Front Door Driver Side Step Lamp Harness Connector D9 Terminal 1 And Ground
      G05222245Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between rear step lamp (LH and RH) harness connector and ground.
      (+) (-) Voltage (Approx.)
      Rear step lamp connector Terminal
      LH D60 1 Ground Battery voltage
      RH D80 1

    OK or NG 

    OK: GO TO 3.

    NG: GO TO  4.

  3. CHECK STEP LAMP CIRCUIT 
    1. Disconnect BCM connector and front door driver side step lamp connector.
    2. Check continuity between BCM harness connector and front step lamp harness connector.
      BCM connector Terminal Front step lamp connector Terminal Continuity
      M4 47 Driver side D9 2 Yes
      Passenger side D39 2
      Fig 2: Identifying Continuity Between BCM Connector Terminal 47 And Front Door Driver Side Step Lamp Connector Terminal 2
      G05222246Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check continuity between BCM harness connector and rear step lamp harness connector.
      BCM connector Terminal Front step lamp connector Terminal Continuity
      M4 47 LH D80 2 Yes
      RH D60 2

    OK or NG 

    OK: Replace BCM if step lamp does not work after setting the connector again. Refer to "REMOVAL AND INSTALLATION OF BCM ".

    NG: Repair harness or connector.

  4. CHECK STEP LAMP CIRCUIT 
    1. Disconnect BCM connector and front door driver side step lamp connector.
    2. Check continuity between BCM harness connector and front step lamp harness connector.
      BCM connector Terminal Front step lamp connector Terminal Continuity
      M4 41 Driver side D9 1 Yes
      Passenger side D39 1
      Fig 3: Identifying Continuity Between BCM Connector Terminal 41 And Front Door Driver Side Step Lamp Connector Terminal 1
      G05222247Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check continuity between BCM harness connector and rear step lamp harness connector.
      BCM connector Terminal Rear step lamp connector Terminal Continuity
      M4 41 LH D80 1 Yes
      RH D60 1

    OK or NG 

    OK: Replace BCM if step lamp does not work after setting the connector again. Refer to "REMOVAL AND INSTALLATION OF BCM ".

    NG: Repair harness or connector.

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