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.

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: CONSULT-II Data Monitor Display
  Courtesy 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
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.

CHECK KEY SWITCH (WITHOUT INTELLIGENT KEY)

Turn ignition switch OFF.
Disconnect key switch connector.

Check continuity between key switch terminals 1 and 2.

CHECK CONTINUITY BETWEEN KEY SWITCH TERMINALS

Key switch condition	Continuity
Key switch is "ON". (Key is inserted in IGN key cylinder.)	Yes
Key switch is "OFF". (Key is removed from IGN key cylinder.)	No

OK or NG

OK: Check the following.
- 10A fuse [No. 21, located in fuse block (J/B)]
- Harness for open or short between key switch and fuse
  
  Fig 4: Checking Continuity Between Key Switch Terminals 1 And 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
- Harness for open or short between BCM and key switch
NG: Replace key switch.