LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2011 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 53 (Audio System, Visual System & Navigation System (Base Audio Without Navigation) - G37 Convertible) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> Display Unit >> DISPLAY UNIT : Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DISPLAY UNIT : Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK POWER SUPPLY CIRCUIT (DISPLAY SIDE)

    Check voltage between display unit harness connector and ground.

    VOLTAGE REFERENCE CHART

    Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
    Inverter VCC M71 2 ACC 9.0 V
    Signal VCC 3

    Is the inspection result normal? 

    YES: Go to  4.

    NO: Go to 2.

  2. CHECK POWER SUPPLY CIRCUIT (CONTINUITY)
    1. Turn ignition switch OFF.
    2. Disconnect the harness connector between display unit and AV control unit.
    3. Check continuity between display unit harness connector M71 and AV control unit harness connector.
      CONTINUITY REFERENCE CHART

      Signal name Display unit (M71) AV control unit (M202) Continuity
      Inverter VCC 2 48 Existed
      Signal VCC 3 36 Existed
    4. Check continuity between display unit harness connector and ground.
      CONTINUITY REFERENCE CHART

      Signal name Display unit (M71) - Continuity
      Inverter VCC 2 Ground Not existed
      Signal VCC 3 Ground Not existed

      Is the inspection result normal? 

      YES: Go to 3.

      NO: Repair harness or connector.

  3. CHECK POWER SUPPLY CIRCUIT (AV CONTROL UNIT SIDE)
    1. Connect the AV control unit harness connector.
    2. Turn ignition switch ACC.
    3. Check voltage between AV control unit harness connector and ground.
      VOLTAGE REFERENCE CHART

      Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
      Inverter VCC M202 48 ACC 9.0 V
      Signal VCC 36

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Replacement of AV control unit.

  4. CHECK GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector.
    3. Check continuity between display unit harness connectors and ground.
      CONTINUITY REFERENCE CHART

      Signal name Connector No. Terminal No. Ignition switch position Continuity
      Ground M71 1 OFF Existed

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Repair harness or connector.

scientia non olet · About LEMON Manuals