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Home >> Infiniti >> 2011 >> G25 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Audio System, Visual System & Navigation System (Base Audio Without Navigation) - G37 Convertible) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Av Control Unit >> AV CONTROL UNIT : Diagnosis Procedure

AV CONTROL UNIT : Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Infiniti G37. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE

    Check for blown fuses.

    FUSES REFERENCE CHART

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

    Is the inspection result normal? 

    YES: Go to 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.

    VOLTAGE REFERENCE CHART

    Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
    Battery power supply M201 19 OFF Battery voltage
    ACC power supply M201 7 ACC Battery voltage

    Is the inspection result normal? 

    YES: Go to 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.
      CONTINUITY REFERENCE CHART

      Signal name Connector No. Terminal No. Ignition switch position Continuity
      Ground M201 20 OFF Existed

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Repair harness or connector.

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