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Home >> Infiniti >> 2017 >> QX70 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 236 (LAN System (Can Gateway) (DTC/Circuit Diagnosis) (Hybrid)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

  1. Check Fuse

    Check That The Following Fuse Are Not Blown.

    Signal Name Fuse No.
    Battery Power Supply 17
    Ignition Power Supply 14

    Is The Fuse Blown (Open)?

    Yes 

    Replace The Blown Fuse After Repairing The Affected Circuit If A Fuse Is Blown.

    No 

    Go To Step 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 Voltage
      (Standard)      		 Voltage
      (Reference Value)
      (+) (-)
      Can Gateway Ground Ignition Switch
      Connector Terminal
      M24 3 Off 6 - 16 V Battery
      Voltage
      9 On 4.5 - 16 V Battery
      Voltage

    Is The Measurement Value Normal?

    Yes 

    Go To Step 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
    M24 5 Existed
    11

    Does Continuity Exist?

    Yes 

    Inspection End

    No 

    Repair Harness Or Connector.

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