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Home >> Infiniti >> 2006 >> FX35 RWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Wiper, Washer & Horn >> Front Wiper And Washer System >> Preliminary Check >> Check Power Supply And Ground Circuit

Check Power Supply And Ground Circuit

  1. CHECK FUSE 

    Check for blown fuses.

    POWER SOURCE REFERENCE

    Unit Power source Fuse and fusible link No.
    Front washer pump Ignition switch ON or START 84
    Front wiper motor, front wiper relay, front wiper HI relay Battery 73
    BCM Battery M
    22
    Ignition switch ON or START 1

    Refer to "WIRING DIAGRAM - WIPER - ".

    OK or NG 

    OK : GO TO 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.
      IGNITION SWITCH POSITION REFERENCE

      (+) (-) Ignition switch position
      BCM connector Terminal OFF ON
      M3 38 Ground Approx. 0 V Battery voltage
      M4 42 Battery voltage Battery voltage
      55 Battery voltage Battery voltage
      Fig 1: Identifying Voltage Between BCM Harness Connector And Ground
      G04078682Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK : GO TO 3.

      NG : Repair harness or connector.

  3. CHECK GROUND CIRCUIT 

    Check continuity between BCM harness connector and ground.

    BCM CONNECTOR TERMINAL CONTINUITY REFERENCE

    BCM connector Terminal Ground Continuity
    M4 49 Yes
    52

    OK or NG 

    OK : INSPECTION END

    NG : Repair harness or connector.

    Fig 2: Identifying Continuity Between BCM Harness Connector And Ground
    G04078683Courtesy of NISSAN MOTOR CO., U.S.A.
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