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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 B2628: 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 82, 83 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 (back door) connector.
    2. Check continuity between BCM harness connector and outside key antenna (back door) harness connector.
      BCM Outside key antenna (back door) Continuity
      Connector Terminal Connector Terminal
      M71 82 D153 1 Existed
      83 2
    3. Check continuity between BCM harness connector and ground.
      BCM Ground  
      Continuity
      Connector Terminal
      M71 82 Not existed
      83

    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 (back door). (New antenna or other antenna)
    2. Connect BCM and outside key antenna (back door) connector.
    3. Check signal between BCM harness connector and ground using oscilloscope.
      (+) (-) Condition Signal
      (Reference value)
      BCM
      Connector Terminal
      M71 82, 83 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 (back door).

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

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