Check Key Switch

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

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
  1. KEY ON SW : ON
- When key is removed from ignition key cylinder
  1. KEY ON SW : OFF
Fig 1: DATA MONITOR - CONSULT II Display
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between BCM connector and ground.

Fig 2: Connector Terminals Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Voltage Between BCM Connector And Ground
Courtesy 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)
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 4: Connector Terminals Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Continuity Between Key Switch Or Key Switch And Ignition Knob Switch Terminals 3 And 4
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  1. 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
  2. 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 6: Connector Terminals Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 7: Checking Continuity Between Key Switch Terminals 1 And 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  OK or NG
  1. 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
  2. NG : Replace key switch or key switch and ignition knob switch.