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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door & Lock (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> DTC B2627: Outside Antenna >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL 1

    Check signal between BCM harness connector and ground using oscilloscope.

    (+) (-) Condition Signal
    (Reference value)
    BCM
    Connector Terminal
    M16 121, 122 Ground When pressing the front door request switch (driver side) with all doors are locked and ignition switch OFF When Intelligent Key is not in the antenna detection area
    GNSJSMIA1506GB-506Courtesy of NISSAN NORTH AMERICA, INC.
    When Intelligent Key is in the antenna detection area
    GNSJSMIA1507GB-507Courtesy 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. Turn ignition switch OFF.
    2. Disconnect BCM connector and front one touch unlock sensor assembly (driver side) connector.
    3. Check continuity between BCM harness connector and front one touch unlock sensor assembly (driver side) harness connector.
      BCM Front one touch unlock sensor assembly (driver side) Continuity
      Connector Terminal Connector Terminal
      M16 121 D10 4 Existed
      122 1
    4. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M16 121 Not existed
      122

    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 front door outside handle grip LH. (New antenna or other antenna)
    2. Connect BCM connector and front one touch unlock sensor assembly (driver side) connector.
    3. Check signal between BCM harness connector and ground using oscilloscope.
      (+) (-) Condition Signal
      (Reference value)
      BCM
      Connector Terminal
      M16 121, 122 Ground When pressing the front door request switch (driver side) with all doors are locked and ignition switch OFF When Intelligent Key is not in the antenna detection area
      GNSJSMIA1506GB-506Courtesy of NISSAN NORTH AMERICA, INC.
      When Intelligent Key is in the antenna detection area
      GNSJSMIA1507GB-507Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES 

    Replace front door outside handle grip LH.

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

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