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Key Switch (Intelligent Key Unit Input) Check

WARNING: This page is about a different car, the 2007 Nissan Versa. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK KEY SWITCH INPUT SIGNAL 

    With CONSULT-II 

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

    MONITOR ITEM CONDITION

    Monitor item Condition
    KEY SW Insert mechanical key into ignition switch: ON
    Remove mechanical key from ignition switch: OFF
    Fig 1: DATA MONITOR Mode In CONSULT-II Screen
    G04814456

    Without CONSULT-II 

    1. Turn ignition switch OFF.
    2. Disconnect Intelligent Key unit connector.
    3. Check voltage between Intelligent Key unit and ground.
      CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

      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 2: Checking Key Switch (Intelligent Key Unit Input)
      G04814457

    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.
      CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

      Terminals Voltage (V) (Approx.)
      (+) (-)
      Key switch and ignition knob switch connector Terminal
      M73 2 Ground Battery voltage

    OK or NG 

    OK >> GO TO 3.

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

    Fig 3: Checking Key Switch Power Supply Circuit
    G04814458
  3. CHECK KEY SWITCH 

    Check continuity of key switch and ignition knob switch.

    CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

    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

    OK or NG 

    OK >> GO TO 4.

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

    Fig 4: Checking Key Switch
    G04814459
  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.
      CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

      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.
      CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

      A Ground Continuity
      Intelligent Key unit connector Terminal
      M52 7 No
      Fig 5: Checking Key Switch Circuit
      G04814460

    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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