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AV CONTROL UNIT : Diagnosis Procedure

  1. CHECK FUSE

    Check for blown fuses.

    FUSES REFERENCE CHART

    Power source Fuse No.
    Battery 34
    Ignition switch ACC or ON 19
    Ignition switch ON or START 3

    Is the inspection result normal? 

    YES: GO TO 2.

    NO: Be sure to eliminate the 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 Voltage (Approx.)
    Battery power supply M84 19 OFF Battery voltage
    M85 22
    24
    ACC power supply M84 7 ACC Battery voltage
    M85 25
    Ignition signal M85 35 ON 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 M85 21 OFF Existed
      23
      43

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Repair harness or connector.

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