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Home >> Infiniti >> 2014 >> QX60 Base, FWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> LAN System (Can Gateway) (Except Hybrid) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE 

    Check that the following fuse are not blown.

    Signal name Fuse No.
    Battery power supply 25
    Ignition power supply 31

    Is the fuse fusing? 

    YES: Replace the blown fuse after repairing the affected circuit if a fuse is blown.

    NO: GO TO 2.

  2. CHECK POWER SUPPLY CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Disconnect the connector of CAN gateway.
    3. Check voltage between CAN gateway harness connector and ground.
      Terminals Condition Standard voltage Reference voltage (Approx.)
      (+) (-)
      CAN gateway Ground Ignition switch
      Connector Terminal
      M5 3 OFF 6 - 16 V Battery voltage
      9 ON 4.5 - 16 V Battery voltage

      Is the measurement value normal? 

      YES: GO TO 3.

      NO: Repair harness or connector.

  3. CHECK GROUND CIRCUIT 

    Check continuity between CAN gateway harness connector and ground.

    CAN gateway Ground Continuity
    Connector Terminal
    M5 5 Existed
    11

    Does continuity exist? 

    YES: INSPECTION END

    NO: Repair harness or connector.

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