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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1058 (Door & Lock (With Intelligent Key System)) >> DTC/Circuit Diagnosis >> Outside Key Antenna >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK OUTSIDE KEY ANTENNA INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Check signal between Intelligent Key unit connector M164 terminals 17, 19, 37 and ground with an oscilloscope.
    Connector Item Terminals Condition Signal (Reference value)
    (+) (-)
    M164 Rear bumper antenna 17 Ground Request switch is pushed
    G04916787
    Front outside antenna LH 19
    Front outside antenna RH 37
    Fig 1: Checking Signal Between Intelligent Key Unit Connector M164 Terminals 17, 19, 37 And Ground Using Oscilloscope
    G04916843Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: Outside key antenna is OK.

    NO: 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 (B) D15 (driver side) or D115 (passenger side), rear bumper antenna connector (C) C127 terminals 1, 2 and Intelligent Key unit harness connector (A) M164 terminals 17, 18, 19, 20, 37, and 38.
      Item Connector Terminal Connector Terminal Continuity
      Rear bumper antenna C: C127 1 A: M164 17 Yes
      2 18
      Front outside antenna LH B: D15 2 19
      1 20
      Front outside antenna RH B: D115 2 37
      1 38
    3. Check continuity between each outside key antenna harness connector terminals 1, 2 and ground.
    Item Connector Terminal Continuity
    Rear bumper antenna C: C127 1 Ground No
    2
    Front outside antenna LH B: D15 1
    2
    Front outside antenna RH B: D115 1
    2
    Fig 2: Checking Continuity Between Outside Key Antenna Harness Connector D15 Terminals 1, 2 And Ground
    G05713142Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: GO TO 3

    NO: Repair or 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 M164 terminals 17, 19, 37 and ground with an oscilloscope.
    Connector Item Terminals Condition Signal (Reference value)
    (+) (-)
    M164 Rear bumper 17 Ground Request switch is pushed
    G04916787
    Front outside antenna LH 19
    Front outside antenna RH 37
    Fig 3: Checking Signal Between Intelligent Key Unit Connector M164 Terminals 17, 19, 37 And Ground Using Oscilloscope
    G04916843Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: Replace outside key antenna.

    NO: Replace Intelligent Key unit. Refer to "REMOVAL AND INSTALLATION ".

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