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AV CONTROL UNIT: Diagnosis Procedure

  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 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 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.
      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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