Check Key Switch

WARNING: This page is about a different car, the 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH INPUT SIGNAL
Check voltage between BCM connector M3 terminal 62 (B/P) and ground.

Fig 1: Checking BCM Connector Terminal Voltage And Ground Table
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Key switch is OK.
2. NG : GO TO 2
Fig 2: Checking Voltage Between BCM Connector Terminal And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK KEY SWITCH
Check continuity between key switch connector M25 terminals 1 and 2.

Fig 3: Checking Key Switch Continuity Table
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 4: Checking Continuity Between Key Switch Connector M25 Terminals 1 And 2
Courtesy of NISSAN MOTOR CO., U.S.A.