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Home >> Infiniti >> 2017 >> QX70 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 168 (Body Control System (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 AND FUSIBLE LINK

    Check that the following fuse and fusible link are not blown (open).

    Signal name Fuse and fusible link No.
    Battery power supply 78 (10 A)
    T (40 A)

    Is the fuse or fusible link blown (open)?

    YES 

    Replace the blown (open) fuse or fusible link after repairing the affected circuit if a fuse or fusible link is blown (open).

    NO 

    GO TO STEP 2. 

  2. CHECK POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect BCM connectors.
    3. Check voltage between BCM harness connector and ground.
      (+) (-) Voltage
      BCM
      Connector Terminal
      M17 131 Ground 9 - 16 V
      139

    Is the measurement value normal?

    YES 

    GO TO STEP 3. 

    NO 

    Repair harness or connector.

  3. CHECK GROUND CIRCUIT

    Check continuity between BCM harness connector and ground.

    BCM Ground Continuity
    Connector Terminal
    M17 134 Existed
    143

    Does continuity exist?

    YES 

    INSPECTION END

    NO 

    Repair harness or connector.

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