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Home >> Infiniti >> 2004 >> G35 x >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> 2004.5 - Headlamp (For USA) - Sedan >> Headlamp (For USA) >> Preliminary Check >> Check Power Supply And Ground Circuit

Check Power Supply And Ground Circuit

  1. CHECK FUSES 
    • Check fuses for blown-out.
      TERMINAL CHART

      Unit Power source Fuse and fusible link No.
      BCM Battery F
      18
      Ignition switch ON or START position 1
      Ignition switch ACC or ON position 6
      IPDM E/R Battery 72
      74
      76
      86

    Refer to "WIRING DIAGRAM - H/LAMP - ".

    OK or NG

    1. OK: GO TO 2.
    2. NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to POWER SUPPLY ROUTING CIRCUIT .
  2. CHECK POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector.
    3. Check voltage between BCM harness connector and ground.
      POWER SUPPLY CIRCUIT TERMINAL CHART

      Terminals Ignition switch position
      (+) (-) OFF ACC ON
      Connector Terminal (Wire color)
      M1 11 (LG) Ground 0V Battery voltage Battery voltage
      38 (W/L) 0V 0V Battery voltage
      M2 42 (GY) Battery voltage Battery voltage Battery voltage
      55 (W/R) Battery voltage Battery voltage Battery voltage

    OK or NG

    1. OK: GO TO 3.
    2. NG: Check harness for open or short between BCM and fuse.
      Fig 1: Checking Voltage Between BCM Harness Connector And Ground
      G03327869Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK GROUND CIRCUIT 

    Check continuity between BCM harness connector and ground.

    GROUND CIRCUIT TERMINAL CHART

    Terminals Continuity
    Connector Terminal (Wire color) Ground Yes
    M2 52 (B)

    OK or NG

    1. OK: INSPECTION END
    2. NG: Check ground circuit harness.
      Fig 2: Checking Continuity Between BCM Harness Connector And Ground
      G03327870Courtesy of NISSAN MOTOR CO., U.S.A.
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