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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Door & Lock (Diagnostic Trouble Codes (DTCS), Symptom Tests And R & I) >> DTC/Circuit Diagnosis >> DTC B2627: Outside 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.
      (+) (-) Condition Signal
      (Reference value)
      BCM
      Connector Terminal
      M71 78, 79 Ground When the driver door request switch is operated with ignition switch OFF When Intelligent Key is in the antenna detection area (The distance between Intelligent Key and antenna: 80 cm or less)
      GNSJMKIA5955GB-955Courtesy of NISSAN NORTH AMERICA, INC.
      When Intelligent Key is not in the antenna detection area (The distance between Intelligent Key and antenna: Approx. 2 m)
      GNSJMKIA5954GB-954Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 2  .

  2. CHECK OUTSIDE KEY ANTENNA CIRCUIT

    1. Disconnect BCM connector and outside key antenna (driver side) connector.
    2. Check continuity between BCM harness connector and outside key antenna (driver side) harness connector.
      BCM Outside key antenna (driver side) Continuity
      Connector Terminal Connector Terminal
      M71 78 D12 1 Existed
      79 2
    3. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M71 78 Not existed
      79

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace harness.

  3. CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 2

    1. Replace outside key antenna (driver side). (New antenna or other antenna)
    2. Connect BCM connector and outside key antenna (driver side) connector.
    3. Check signal between BCM harness connector and ground using oscilloscope.
      (+) (-) Condition Signal
      (Reference value)
      BCM
      Connector Terminal
      M71 78, 79 Ground When the driver door request switch is operated with ignition switch OFF When Intelligent Key is in the antenna detection area (The distance between Intelligent Key and antenna: 80 cm or less)
      GNSJMKIA5955GB-955Courtesy of NISSAN NORTH AMERICA, INC.
      When Intelligent Key is not in the antenna detection area (The distance between Intelligent Key and antenna: Approx. 2 m)
      GNSJMKIA5954GB-954Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES 

    Replace outside key antenna (driver side).

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

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