Key Switch Check

With CONSULT-III 

Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT-III. Refer to "CONSULT-III FUNCTION (BCM) ".

• When key is inserted into ignition key cylinder:

  KEY ON SW : ON 

• When key is removed from ignition key cylinder:

  KEY ON SW : OFF 

  Without CONSULT-III 

  Check voltage between BCM connector and ground.

  VOLTAGE AND CONTINUITY SPECIFICATIONS
  
  

  Connector	Terminals		Condition	Voltage (V) (Approx.)
  	(+)	(-)
  M18	37	Ground	Key is inserted.	Battery voltage
  			Key is removed.	0

  Fig 1: Checking Voltage Between BCM Connector Terminal 37 And Ground

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

  OK or NG 

  OK: Key switch circuit is OK.

  NG: GO TO 2.

1. Turn ignition switch OFF.
2. Disconnect key switch connector.
3. Check key switch.
   VOLTAGE AND CONTINUITY SPECIFICATIONS
   
   

   Terminals	Condition	Continuity
   1 - 2	Key is inserted.	Yes
   	Key is removed.	No

   Fig 2: Checking Key Switch

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

   OK or NG 

   OK: Check the following.

   • 10A fuse [No. 19, 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.