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Home >> Infiniti >> 2011 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 51 (Audio System, Visual System & Navigation System (BOSE Audio With Navigation) -- G37 Convertible) >> DTC/Circuit Diagnosis >> DTC U1243: Display Unit >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT

    Check display unit power supply and ground circuit. Refer to "DISPLAY UNIT : DIAGNOSIS PROCEDURE ".

    Is the inspection result normal? 

    YES: Go to 2.

    NO: Repair malfunctioning parts.

  2. CHECK CONTINUITY COMMUNICATION 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.
      TERMINALS CONTINUITY REFERENCE CHART

      Display unit AV control unit Continuity
      Connector Terminals Connector Terminals
      M75 9 M210 89 Existed
      10 73
    4. Check continuity between display unit harness connector and ground.
      TERMINALS CONTINUITY REFERENCE CHART

      Display unit Ground Continuity
      Connector Terminals
      M75 9 Not existed
      10

      Is the inspection result normal? 

      YES: Go to 3.

      NO: Repair harness or connector.

  3. CHECK COMMUNICATION 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.
      TERMINALS SIGNAL REFERENCE CHART

      (+) (-) Condition Reference value
      Display unit
      Connector Terminal
      M75 9 Ground When adjusting display brightness.
      G07161574Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: Go to 4.

      NO: Replace AV control unit. Refer to "EXPLODED VIEW ".

  4. CHECK COMMUNICATION SIGNAL

    Check signal between display unit harness connector and ground.

    TERMINALS SIGNAL REFERENCE CHART

    (+) (-) Condition Reference value
    Display unit
    Connector Terminal
    M75 10 Ground When adjusting display brightness.
    G07161575Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: INSPECTION END

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

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