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Outside Key Antenna Check

  1. CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Check signal between Intelligent Key unit connector M42 terminals 17, 19, 37 and ground with an oscilloscope.
      SIGNAL REFERENCE CHART

      Connector Item Terminals Condition Signal (Reference value)
      (+) (-)
      M42 Rear bumper antenna 17 Ground Request switch is pushed
      G07140431Courtesy of NISSAN MOTOR CO., U.S.A.
      Front outside antenna LH 19
      Front outside antenna RH 37
      Fig 1: Checking Signal Between Intelligent Key Unit Connector M42 Terminals 17, 19, 37 And Ground
      G07140432Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Outside key antenna is OK.

      NG: GO TO 2.

  2. CHECK OUTSIDE KEY ANTENNA CIRCUIT
    1. Disconnect Intelligent Key unit connector and outside key antenna connector.
    2. Check continuity between each outside key antenna harness connector D4 (B) (LH) or D103 (B) (RH), rear bumper antenna connector B49 (C) terminals 1, 2 and Intelligent Key unit harness connector M42 (A) terminals 17, 18, 19, 20, 37, and 38.
      VOLTAGE AND CONTINUITY SPECIFICATIONS

      Item Connector Terminal Connector Terminal Continuity
      Rear bumper antenna C: B49 1 A: M42 17 Yes
      2 18
      Front outside antenna LH B: D4 1 19
      2 20
      Front outside antenna RH B: D103 1 37
      2 38
    3. Check continuity between each outside key antenna harness connector terminals 1, 2 and ground.
      Fig 2: Checking Continuity Between Each Outside Key Antenna Harness Connector Terminals And Ground
      G07140433Courtesy of NISSAN MOTOR CO., U.S.A.
      VOLTAGE AND CONTINUITY SPECIFICATIONS

      Item Connector Terminal Continuity
      Rear bumper antenna C: B49 1 Ground No
      2
      Front outside antenna LH B: D4 1
      2
      Front outside antenna RH B: D103 1
      2

      OK or NG 

      OK: GO TO 3.

      NG: Replace harness between outside key antenna and Intelligent Key unit.

  3. CHECK OUTSIDE KEY ANTENNA POWER SUPPLY
    1. Replace outside key antenna. (New antenna or other antenna)
    2. Connect Intelligent Key unit connector and outside key antenna connector.
    3. Check signal between Intelligent Key unit connector terminals 17, 19, 37 and ground with an oscilloscope.
      SIGNAL REFERENCE CHART

      Connector Item Terminals Condition Signal (Reference value)
      (+) (-)
      M42 Rear bumper antenna 17 Ground Request switch is pushed
      G07140434Courtesy of NISSAN MOTOR CO., U.S.A.
      Front outside antenna LH 19
      Front outside antenna RH 37
      Fig 3: Checking Signal Between Intelligent Key Unit Connector Terminals 17, 19, 37 And Ground
      G07140435Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Replace outside key antenna.

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

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