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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1748 (Body, Lock & Security System (Sedan)) >> Intelligent Key System >> Check Inside Key Antenna
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Check Inside Key Antenna

WARNING: This page is about a different car, the 2006 Infiniti G35. 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 oscilloscope.
    TERMINALS SIGNALS REFERENCE

    Connector Item Terminal (Wire color) Condition Signal (V) (Reference value)
    (+) (-)
    M75 Trunk room 13 (B) Ground Any door is open --> All doors are closed
    G04077024
    Center console 15 (G) Ground Ignition switch is pushed.
    Dash board 35 (LG)
    Fig 1: Identifying Signal Between Intelligent Key Unit Connector And Ground
    G04122454Courtesy 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 M172 (center console), M69 (dashboard), B114 (trunk room) terminals 1, 2 and Intelligent Key unit harness connector M75 terminals 13, 14, 15, 16, 35 and 36.
      TERMINALS CONTINUITY REFERENCE

      Item Connector Terminal (Wire color) Connector Terminal (Wire color) Continuity
      Trunk room B114 1 (B) M75 13 (B) Yes
      2 (W) 14 (W)
      Center console M172 1 (G) 15 (G)
      2 (R) 16 (R)
      Dashboard M69 1 (LG) 35 (LG)
      2 (PU) 36 (PU)
      Fig 2: Identifying Continuity Between Inside Key Antenna Harness Connector Terminals 1, 2 And Ground
      G04122455Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check continuity between inside key antenna harness connector M172 (center console), M69 (dashboard), B114 (trunk room) terminals 1, 2 and ground.
      TERMINALS CONTINUITY REFERENCE

      Item Connector Terminal (Wire color) Continuity
      Trunk room B114 1 (B) Ground No
      2 (W)
      Center console M172 1 (G)
      2 (R)
      Dashboard M69 1 (LG)
      2 (PU)

      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.
    TERMINALS SIGNALS REFERENCE

    Connector Item Terminal (Wire color) Condition Signal (V) (Reference value)
    (+) (-)
    M75 Trunk room 13 (B) Ground Any door is open --> All doors are closed
    G04077024
    Center console 15 (G) Ground Ignition switch is pushed.
    Dash board 35 (LG)
    Fig 3: Identifying Signal Between Intelligent Key Unit Connector And Ground
    G04122457Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK: Replace inside key antenna.
    • NG: Replace Intelligent key unit.
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