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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 B2628: 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
    M15 101, 102 Ground When pressing the trunk lid opener request switch with all doors are locked and ignition switch OFF When Intelligent Key is not in the antenna detection area
    GNSJSMIA1504GB-504Courtesy of NISSAN NORTH AMERICA, INC.
    When Intelligent Key is in the antenna detection area
    GNSJSMIA1505GB-505Courtesy 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 outside key antenna (rear bumper) connector.
    3. Check continuity between BCM harness connector and outside key antenna (rear bumper) harness connector.
      BCM Outside key antenna (rear bumper) Continuity
      Connector Terminal Connector Terminal
      M15 101 B96 2 Existed
      102 1
    4. Check continuity between BCM harness connector and ground.
      BCM Ground  
      Continuity
      Connector Terminal
      M15 101 Not existed
      102

    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 (rear bumper). (New antenna or other antenna)
    2. Connect BCM and outside key antenna (rear bumper) connector.
    3. Check signal between BCM harness connector and ground using oscilloscope.
      (+) (-) Condition Signal
      (Reference value)
      BCM
      Connector Terminal
      M15 101, 102 Ground When pressing the trunk lid opener request switch with all doors are locked and ignition switch OFF When Intelligent Key is not in the antenna detection area
      GNSJSMIA1504GB-504Courtesy of NISSAN NORTH AMERICA, INC.
      When Intelligent Key is in the antenna detection area
      GNSJSMIA1505GB-505Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES 

    Replace outside key antenna (rear bumper).

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .