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Key Switch (Intelligent Key Unit Input) Check

  1. CHECK KEY SWITCH INPUT SIGNAL

    With CONSULT-III 

    Check key switch ("KEY SW") in "DATA MONITOR" mode with CONSULT-III.

    DATA MONITOR REFERENCE

    Monitor item Condition
    KEY SW Insert mechanical key into ignition switch: ON
    Remove mechanical key from ignition switch: OFF

    Without CONSULT-III 

    1. Turn ignition switch OFF.
    2. Disconnect Intelligent Key unit connector.
    3. Check voltage between Intelligent Key unit and ground.
      TERMINALS VOLTAGE REFERENCE

      Terminals Condition of key switch Voltage (V) (Approx).
      (+) (-)
      Intelligent Key unit connector Terminal
      M52 7 Ground Insert mechanical key into ignition switch Battery voltage
      Remove mechanical key from ignition switch 0
      Fig 1: Checking Voltage Between Intelligent Key Unit And Ground
      G05933190Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK : Key switch circuit is OK.

      NG : GO TO 2.

  2. CHECK KEY SWITCH POWER SUPPLY CIRCUIT
    1. Remove mechanical key from ignition switch.
    2. Disconnect key switch and ignition knob switch connector.
    3. Check voltage between key switch and ignition knob switch and ground.
      TERMINALS VOLTAGE REFERENCE

      Terminals Voltage (V) (Approx).
      (+) (-)
      Key switch and ignition knob switch connector Terminal
      M73 2 Ground Battery voltage
      Fig 2: Checking Voltage Between Key Switch And Ignition Knob Switch And Ground
      G05933191Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK : GO TO 3.

      NG : Repair or replace key switch and ignition knob switch power supply circuit.

  3. CHECK KEY SWITCH

    Check continuity of key switch and ignition knob switch.

    TERMINALS CONTINUITY REFERENCE

    Terminal Condition of key switch Continuity
    Key switch and ignition knob switch
    1 2 Insert mechanical key into ignition switch Yes
    Remove mechanical key from ignition switch No
    Fig 3: Checking Continuity Of Key Switch And Ignition Knob Switch
    G05933192Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO 4.

    NG : Replace key cylinder assembly (built-in key switch).

  4. CHECK KEY SWITCH CIRCUIT
    1. Disconnect Intelligent Key unit connector.
    2. Check continuity between Intelligent Key unit and key switch and ignition knob switch.
      TERMINALS CONTINUITY REFERENCE

      A B Continuity
      Intelligent Key unit connector Terminal Key switch and ignition knob switch connector Terminal
      M52 7 M73 1 Yes
    3. Check continuity between Intelligent Key unit and ground.
      TERMINALS CONTINUITY REFERENCE

      A Ground Continuity
      Intelligent Key unit connector Terminal
      M52 7 No
      Fig 4: Checking Continuity Between Intelligent Key Unit And Ground
      G05933193Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK : Check the condition of harness and harness connector.

      NG : Repair or replace harness between Intelligent Key unit and key switch and ignition knob switch.

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