Check Key Switch

CHECK KEY SWITCH INPUT SIGNAL
Check ignition key switch IGN ON SW in DATA MONITOR mode with CONSULT- II.
- When key is inserted in ignition key cylinder
  IGN KEY SW: ON
- When key is removed from ignition key cylinder
  IGN KEY SW: OFF
  
  Fig 1: CONSULT-II DATA MONITOR Display Screen
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check voltage between BCM connector M37 terminal 62 (B/R) and ground.

Fig 2: Terminal Voltage Based On Conditions
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 Between BCM And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK KEY SWITCH
Check continuity between key switch connector M28 terminals 3 and 4.

Fig 4: Terminal Continuity Based On Conditions
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 Connector Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.