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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 >> Tel Adapter Unit >> TEL ADAPTER UNIT : Diagnosis Procedure
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TEL ADAPTER UNIT : Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK FUSE

    Check for blown fuses.

    FUSES REFERENCE CHART

    Power source Fuse No.
    Battery 34
    Ignition switch ACC or ON 19

    Is the inspection result normal? 

    YES: Go to 2.

    NO: Be sure to eliminate cause of malfunction before installing new fuse.

  2. CHECK POWER SUPPLY CIRCUIT

    Check voltage between TEL adapter unit harness connector and ground.

    VOLTAGE REFERENCE CHART

    Signal name Connector No. Terminal No. Ignition switch position Value (Approx.)
    Battery power supply B237 1 OFF Battery voltage
    ACC power supply B237 2 ACC Battery voltage

    Is the inspection result normal? 

    YES: Go to 3.

    NO: Check harness between TEL adapter unit and fuse.

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

      Signal name Connector No. Terminal No. Ignition switch position Continuity
      Ground B237 4, 14 OFF Existed

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Repair harness or connector.

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