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
With CONSULT-II

Check ignition key cylinder switch "IGN ON SW" in "DATA MONITOR" mode with CONSULT-II
- When key is inserted in ignition key cylinder
  1. IGN KEY SW : ON
- When key is removed from ignition key cylinder
  1. IGN KEY SW : OFF
    
    Fig 1: Checking Key Switch Input Signal With CONSULT-II
    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 Specification
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Key Switch Input Signal Without CONSULT-II
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK : Key switch circuit is OK.

NG : Go to 2.
Check Key Switch
1. Disconnect key switch connector.
2. Check continuity between key switch terminals 1 and 2.
  
  Fig 4: Key Switch Continuity Check Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Key Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
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
- Harness for open or short between BCM and key switch
NG : Replace key switch.