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Home >> Infiniti >> 2012 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Audio, Visual & Navigation System (Base Audio Without Navigation) -- G37 Convertible) >> DTC/Circuit Diagnosis >> Vertical Synchronizing (VP) Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2010 Infiniti G37. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CONTINUITY VERTICAL SYNCHRONIZING (VP) SIGNAL CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector and AV control unit connector.
    3. Check continuity between display unit harness connector and AV control unit harness connector.
      CONTINUITY CHART

      Display unit AV control unit Continuity
      Connector Terminal Connector Terminal
      M71 20 M202 50 Existed
    4. Check continuity between display unit harness connector and ground.
      CONTINUITY CHART

      Display unit Ground Continuity
      Connector Terminal
      M71 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 display unit connector and AV control unit connector.
    2. Turn ignition switch ON.
    3. Check signal between display unit harness connector and ground.
      DISPLAY UNIT CONNECTOR TERMINALS REFERENCE CHART

      (+) (-) Reference value
      Display unit
      Connector Terminal
      M71 20 Ground
      G04923331Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: Replace AV control unit. Refer to "EXPLODED VIEW ".

      NO: Replace display unit. Refer to "EXPLODED VIEW ".

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