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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2076 (Body, Lock & Security System) >> Intelligent Key System >> Door Switch Check >> Inside Key Antenna Check
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Inside Key Antenna Check

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  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.
      INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

      Connector Item Terminals Condition Signal (V) (Reference value)
      (+) (-)
      M52 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 (B) M76 (instrument panel), M174 (front console), B110 (rear parcel shelf) terminals 1, 2 and Intelligent Key unit harness connector (A) M52 terminals 13, 14, 15, 16, 33 and 34.
      INSIDE KEY ANTENNA HARNESS CONNECTOR (B) M76 (INSTRUMENT PANEL), M174 (FRONT CONSOLE), B110 (REAR PARCEL SHELF) TERMINALS 1, 2 AND INTELLIGENT KEY UNIT HARNESS CONNECTOR (A) M52 TERMINALS 13, 14, 15, 16, 33 AND 34

      Item Connector Terminal Connector Terminal Continuity
      Instrument panel antenna B: M76 1 A: M52 13 Yes
      2 14
      Front console antenna B: M174 1 15
      2 16
      Rear parcel shelf antenna B: B110 1 33
      2 34
    3. Check continuity between Intelligent Key unit harness connector (A) M52 terminals 13, 14, 15, 16, 33, 34 and ground.
      INTELLIGENT KEY UNIT HARNESS CONNECTOR (A) M52 TERMINALS 13, 14, 15, 16, 33, 34 AND GROUND

      Item Connector Terminals Continuity
      Intelligent Key unit A: M52 13 Ground No
      14
      15
      16
      33
      34
    Fig 2: Checking Continuity Between Intelligent Key Unit Harness Connector (A) M52 Terminals 13 And Ground
    G04916849Courtesy of NISSAN MOTOR CO., U.S.A.

    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.
      INSIDE KEY ANTENNA POWER SUPPLY SIGNAL

      Connector Item Terminals Condition Signal (V) (Reference value)
      (+) (-)
      M52 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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