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Check Key Switch

WARNING: This page is about a different car, the 2005 Infiniti G35. 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 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: OF 

      Fig 1: Consult-II Data Monitor Display
      G02354228Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    Check voltage between BCM connector and ground.

    Fig 2: BCM Connector And Ground Voltage Table
    G02354229Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 3: Checking Voltage Between BCM Connector And Ground
    G02354230Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Key switch circuit is OK.
    2. NG: GO TO 2. (with Intelligent Key)
    3. NG: GO TO  3 . (without Intelligent Key)
  2. CHECK KEY SWITCH (WITH INTELLIGENT KEY) 
    1. Turn ignition switch OFF.
    2. Disconnect key switch connector.
    3. Check continuity between key switch and ignition knob switch terminal 3 and 4.
      Fig 4: Key Switch And Ignition Knob Switch Continuity Table
      G02354231Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 5: Checking Continuity Between Key Switch And Ignition Knob Switch Terminal 3 And 4
      G02354232Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Check the following.
      • 15A fuse (No.33, located in fuse and fusible link block)
      • Harness for open or short between key switch and ignition knob switch and fuse.
      • Harness for open or short between BCM and key switch and ignition knob switch.
    2. NG: Replace key switch.
  3. CHECK KEY SWITCH (WITHOUT INTELLIGENT KEY) 
    1. Turn ignition switch OFF.
    2. Disconnect key switch connector.
    3. Check continuity between key switch terminal 1 and 2.
      Fig 6: Key Switch Terminal 1 And 2 Continuity Table
      G02354233Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 7: Checking Continuity Between Key Switch Terminal 1 And 2
      G02354234Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Check the following.
      • 10A fuse (No.21, 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.
    2. NG: Replace key switch.
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