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Home >> Nissan-Datsun >> 2009 >> 370Z Base, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Entertainment Systems >> Audio System, Visual System, Navigation System >> BOSE Audio With Navigation >> Component Diagnosis >> Vertical Synchronizing (VP) Signal Circuit >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK CONTINUITY VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect front display unit connector and AV control unit connector.
    3. Check continuity between front display unit harness connector and AV control unit harness connector.
      CONTINUITY REFERENCE CHART

      Front display unit AV control unit Continuity
      Connector Terminal Connector Terminal
      M75 20 M86 69 Existed
    4. Check continuity between front display unit harness connector and ground.
      CONTINUITY REFERENCE CHART

      Front display unit Ground Continuity
      Connector Terminal
      M75 20 Not existed

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair harness or connector.

  2. CHECK VERTICAL SYNCHRONIZING (VP) SIGNAL
    1. Connect front display unit connector and AV control unit connector.
    2. Turn ignition switch ON.
    3. Check signal between front display unit harness connector and ground using an oscilloscope.
      SIGNAL WAVEFORM REFERENCE CHART

      (+) (-) Condition Reference value
      Front display unit
      Connector Terminal
      M75 20 Ground -
      G04923331Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: Replace AV control unit.

      NO: Replace front display unit.

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