Check Key Switch

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH
With CONSULT-II

Check key switch "IGN KEY SW" in "DATA MONITOR" mode with CONSULT-II.

Key is inserted in ignition key cylinder :IGN KEY SW ON

Key is removed from ignition key cylinder :IGN KEY SW OFF

Without CONSULT-II

Check voltage between BCM connector and ground.

OK or NG
1. OK: Key switch is OK.
2. NG: GO TO 2.
Fig 1: Checking Key Switch Without CONSULT-II (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: Checking Key Switch Without CONSULT-II (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK KEY SWITCH CIRCUIT
1. Disconnect key switch connector.
2. Check continuity between BCM connector M4 terminal 69 (PU/W) and key switch connector M64 terminal 4 (PU/W).
  
  Fig 3: Checking Key Switch Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  69 (PU/W) - 4 (PU/W) :Continuity should exist.
3. Check continuity between BCM connector M4 terminal 69 (PU/W) and ground.
  69 (PU/W) - Ground :Continuity should not exist.
OK or NG
1. OK: GO TO 3.
2. NG: Repair or replace harness.
CHECK KEY SWITCH
Check continuity between key switch terminals 3 and 4.

Fig 4: Checking Key Switch (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Key Switch (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Check the following.
  - 10A fuse [No. 32, located in fuse block (J/B) No. 2]
  - Harness for open or short between key switch and fuse
2. NG: Replace key switch.