Check Key Switch

WARNING: This page is about a different car, the 2004 Infiniti G35. 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 cylinder switch "KEY ON SW"in "DATE MONITOR"mode with CONSULT-II

Fig 1: Displaying DATA MONITOR Screen
Courtesy of NISSAN MOTOR CO., U.S.A.
- 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
Without CONSULT-II

Check voltage between BCM connector and ground.

Fig 2: Displaying Terminal Voltage Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Key switch circuit is OK.
2. NG : GO TO 2 .
Fig 3: Checking Voltage At BCM
Courtesy of NISSAN MOTOR CO., U.S.A.
Check key switch .
1. Disconnect key switch connector.
2. Check continuity between key switch terminals 1 and 2.
  
  Fig 4: Displaying Terminal Continuity Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : Check the following.
  - 10A fuse [No. 21, located in fuse block (J/B)]
  - 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.
Fig 5: Checking Continuity Between Key Switch Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.