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Home >> Nissan-Datsun >> 2009 >> Sentra SE-R >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Body, Lock & Security System >> Service Information >> Intelligent Key System >> Inside Key Antenna Check
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Inside Key Antenna Check

  1. CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
    1. Turn ignition switch OFF.
    2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
      CONNECTOR REFERENCE

      Connector Item Terminals Condition Signal (V) (Reference value)
      (+) (-)
      M42 Rear parcel shelf antenna 33 Ground Any door is open → All doors are closed
      G04916785Courtesy of NISSAN MOTOR CO., U.S.A.
      Front console antenna 15 Ground Ignition switch is pushed.
      Instrument panel antenna 13
      Fig 1: Checking Signal Between Intelligent Key Unit Connector And Ground
      G04916848Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Inside key antenna is OK.

      NG: GO TO 2.

  2. CHECK INSIDE KEY ANTENNA
    1. Disconnect Intelligent Key unit connector and inside key antenna connectors.
    2. Check continuity between inside key antenna harness connector M25 (B) (instrument panel), B18 (B) (front console), B45 (B) (rear parcel shelf) terminals 1, 2 and Intelligent Key unit harness connector M42 (A) terminals 13, 14, 15, 16, 33 and 34.
      CONTINUITY CHART

      Item Connector Terminal Connector Terminal Continuity
      Instrument panel antenna B: M25 2 A: M42 13 Yes
      1 14
      Front console antenna B: B18 1 15
      2 16
      Rear parcel shelf antenna B: B45 1 33
      2 34
    3. Check continuity between Intelligent Key unit harness connector M42 (A) terminals 13, 14, 15, 16, 33, 34 and ground.
      Fig 2: Checking Continuity Between Intelligent Key Unit Harness Connector M42 Terminals And Ground
      G04916849Courtesy of NISSAN MOTOR CO., U.S.A.
      CONTINUITY CHART

      Item Connector Terminals Continuity
      Intelligent Key unit A: M42 13 Ground No
      14
      15
      16
      33
      34

      OK or NG 

      OK: GO TO 3.

      NG: Repair or replace harness between inside key antenna and Intelligent Key unit.

  3. CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
    1. Replace inside key antenna. (New antenna or other antenna)
    2. Connect Intelligent Key unit connector.
    3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
      CONNECTOR REFERENCE

      Connector Item Terminals Condition Signal (V) (Reference value)
      (+) (-)
      M42 Rear parcel shelf antenna 33 Ground Any door is open → All doors are closed
      G04916785Courtesy of NISSAN MOTOR CO., U.S.A.
      Front console antenna 15 Ground Ignition switch is pushed.
      Instrument panel antenna 13
      Fig 3: Checking Signal Between Intelligent Key Unit Connector And Ground
      G04916848Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Replace inside key antenna.

      NG: Replace Intelligent Key unit. Refer to "REMOVAL AND INSTALLATION OF INTELLIGENT KEY UNIT ".

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