Key Switch Check

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II

Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT-II. Refer to "DATA MONITOR ".

Fig 1: CONSULT-II Data Display DATA MONITOR
Courtesy of NISSAN MOTOR CO., U.S.A.
- When key is inserted to ignition key cylinder:
  - KEY ON SW: ON
- When key is removed from ignition key cylinder:
  - KEY ON SW: OFF
Without CONSULT-II

Check voltage between BCM connector M18 terminal 37 and ground.

Fig 2: Voltage Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Voltage Between BCM Connector M18 Terminal 37 & Ground
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. Turn ignition switch OFF.
2. Disconnect key switch.
3. Check continuity between key switch terminals 1, 2.
  
  Fig 4: Continuity Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Continuity Between Key Switch Terminals 1 & 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG?
- OK: Repair or replace harness.
- NG: Replace key switch. Refer to "STEERING COLUMN ".