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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Audio, Visual & Navigation System >> DTC/Circuit Diagnosis >> Composite Image Signal Circuit (Av Control Unit To Front Display Unit) >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK CONTINUITY COMPOSITE IMAGE SIGNAL CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect AV control unit connector and front display unit connector.
    3. Check continuity between AV control unit harness connector and front display unit harness connector.
      CONTINUITY SPECIFICATION

      AV control unit Front display unit Continuity
      Connector Terminal Connector Terminal
      M210 68 M215 18 Existed
    4. Check continuity between AV control unit harness connector and ground.
      CONTINUITY SPECIFICATION

      AV control unit Ground Continuity
      Connector Terminal
      M210 68 Not existed

      Is the inspection result normal? 

      YES: Go to 2.

      NO: Repair harness or connector.

  2. CHECK COMPOSITE IMAGE SIGNAL
    1. Connect AV control unit connector and front display unit connector.
    2. Turn ignition switch ON.
    3. Check signal between AV control unit harness connector and ground.
      SIGNAL REFERENCE

      (+) (-) Condition Reference value
      AV control unit
      Connector Terminal
      M210 68 Ground At DVD image is displayed.
      G04890020Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: Replace front display unit. Refer to "REMOVAL AND INSTALLATION ".

      NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

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