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Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Door & Lock -- G37 Coupe >> DTC/Circuit Diagnosis >> Outside Key Antenna >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 1
    1. Turn ignition switch OFF.
    2. Check signal between BCM harness connector and ground using oscilloscope.
      OUTSIDE KEY ANTENNA INPUT SIGNAL 1 REFERENCE CHART

      (+) (-) Condition Signal (Reference value)
      BCM
      Connector Terminal
      LH M122 76, 77 Ground Door request switch is pressed When Intelligent Key is in the antenna detection area.
      G07169428
      RH 74, 75
      Rear bumper M121 38, 39 When Intelligent Key is not in the antenna detection area.
      G07169429

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION "

      NO: GO TO 2.

  2. CHECK OUTSIDE KEY ANTENNA CIRCUIT
    1. Disconnect BCM connector and malfunctioning outside key antenna connector.
    2. Check continuity between malfunctioning outside handle or outside key antenna harness connector and BCM harness connector.
      TERMINALS CONTINUITY REFERENCE CHART

      Outside handle/outside key antenna BCM Continuity
      Connector Terminal Connector Terminal
      LH D14 1 M122 77 Existed
      2 76
      RH D44 1 75
      2 74
      Rear bumper B63 1 M121 39
      2 38
    3. Check continuity between malfunctioning outside handle or outside key antenna harness connector and ground.
      TERMINALS CONTINUITY REFERENCE CHART

      Outside handle/outside key antenna Ground Continuity
      Connector Terminal
      LH D14 1 Not existed
      2
      RH D44 1
      2
      Rear bumper B63 1
      2

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness.

  3. CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 2
    1. Replace malfunctioning outside key antenna. (New antenna or other antenna)
    2. Connect BCM connector and malfunctioning outside key antenna (New antenna or other antenna) connector.
    3. Check signal between BCM harness connector and ground using oscilloscope.
      OUTSIDE KEY ANTENNA INPUT SIGNAL 2 REFERENCE CHART

      (+) (-) Condition Signal (Reference value)
      BCM
      Connector Terminal
      LH M122 76, 77 Ground Door request switch is pressed When Intelligent Key is in the antenna detection area.
      G07169430
      RH 74, 75
      Rear bumper M121 38, 39 When Intelligent Key is not in the antenna detection area.
      G07169431

      Is the inspection result normal? 

      YES-1: Replace outside key antenna LH (driver side). Refer to "DRIVER SIDE : REMOVAL AND INSTALLATION ".

      YES-2: Replace outside key antenna RH (passenger side). Refer to "PASSENGER SIDE : REMOVAL AND INSTALLATION ".

      YES-3: Replace outside key antenna (rear bumper). Refer to "REAR BUMPER : REMOVAL AND INSTALLATION ".

      NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

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