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

Fig 1: Displaying CONSULT-II DATA MONITOR Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

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
Without CONSULT-II

Check voltage between BCM connector M1 terminal 37 (B/P) and ground.

Fig 2: Checking Voltage At BCM
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Displaying Key Switch Signal Specifications
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.

Fig 4: Checking Continuity Between Key Switch Terminals 1 & 2

Courtesy of NISSAN MOTOR CO., U.S.A.

KEY SWITCH CONTINUITY

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.
- 15A fuse [No. 22, 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
NG: Replace key switch.