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Check Key Switch

  1. CHECK KEY SWITCH INPUT SIGNAL 

    With CONSULT-II 

    Check ignition key switch "KEY ON SW" in "DATA MONITOR" mode with CONSULT-II.

    • When key is inserted in ignition key cylinder

      KEY ON SW : ON 

    • When key is removed from ignition key cylinder

      KEY ON SW : OFF 

      Fig 1: Identifying CONSULT II DATA MONITOR Screen
      G04907059Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    Check voltage between BCM connector and ground.

    Fig 2: Identifying Checking Voltage Between BCM Connector And Ground
    G05220783Courtesy of NISSAN MOTOR CO., U.S.A.
    BCM CONNECTOR AND GROUND

    Connector Terminal Condition of key switch Voltage (V) Approx.
    (+) (-)
    M3 37 (B/W) Ground Key is inserted in IGN key cylinder. Battery voltage
    Key is removed from IGN key cylinder. 0

    OK or NG 

    OK: Key switch circuit is OK.

    NG: GO TO 2. (With Intelligent Key)

    NG: GO TO  3. (Without Intelligent Key)

  2. CHECK KEY SWITCH (WITH INTELLIGENT KEY) 
    1. Disconnect key switch and ignition knob switch connector.
    2. Check continuity between key switch or key switch and ignition knob switch terminals 3 and 4.
      Fig 3: Identifying Continuity Between Key Switch And Ignition Knob Switch Connector Terminals 3 And 4
      G04916738Courtesy of NISSAN MOTOR CO., U.S.A.
      KEY SWITCH (WITH INTELLIGENT KEY)

      Terminal Condition of key switch Continuity
      3 4 Key is inserted in IGN key cylinder. Yes
      Key is removed from IGN key cylinder. No

    OK or NG 

    OK: Check the following.

    • 15A fuse (No. 22, located in fuse and fusible link block)
    • Harness for open or short between key switch and fuse
    • Harness for open or short between BCM and key switch

    NG: Replace key switch or key switch and ignition knob switch.

  3. CHECK KEY SWITCH (WITHOUT INTELLIGENT KEY) 
    1. Disconnect key switch connector.
    2. Check continuity between key switch terminals 1 and 2.
      Fig 4: Identifying Continuity Between Key Switch Terminals 1 And 2
      G04877059Courtesy of NISSAN MOTOR CO., U.S.A.
      KEY SWITCH (WITHOUT INTELLIGENT KEY)

      Terminal Condition of key switch Continuity
      1 2 Key is inserted in IGN key cylinder. Yes
      Key is removed from IGN key cylinder. No

    OK or NG 

    OK: Check the following.

    • 15A fuse (No. 22, located in fuse and fusible link block)
    • Harness for open or short between key switch and fuse
    • Harness for open or short between BCM and key switch

    NG: Replace key switch or key switch and ignition knob switch.

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