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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Audio, Visual & Navigation System (Base Audio Without Navigation) (DTC/Circuit Diagnosis)) >> DTC / Circuit Diagnosis >> Power Supply And Ground Circuit >> Av Control Unit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX50. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK FUSE

    Check for blown fuses.

    Power source Fuse No.
    Battery 34
    Ignition switch ACC or ON 19

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK POWER SUPPLY CIRCUIT

    Check voltage between AV control unit harness connectors and ground.

    Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
    Battery power supply M214 19 OFF Battery voltage
    ACC power supply M214 7 ACC Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Check harness between AV control unit and fuse.

  3. CHECK GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect AV control unit connectors.
    3. Check continuity between AV control unit harness connectors and ground.
      Signal name Connector No. Terminal No. Ignition switch position Continuity
      Ground M214 20 OFF Existed

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Repair harness or connector.

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