Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM - WITHOUT INTELLIGENT KEY SYSTEM ".

1. CHECK KEY SWITCH INPUT SIGNAL

   With CONSULT

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

   • 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

   Check voltage between BCM connector M18 terminal 37 and ground.

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

   Fig 1: Checking Voltage Between BCM Connector M18 Terminal 37 And Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal? 

   YES: Key switch (insert) circuit is OK.

   NO: GO TO 2

2. CHECK KEY SWITCH (INSERT)
   1. Turn ignition switch OFF.
   2. Disconnect key switch connector.
   3. Check continuity between key switch terminals.

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

      Is the inspection result normal? 

      YES: Repair or replace harness or fuse.

      NO: Replace key switch.

      Fig 2: Checking Continuity Between Key Switch Terminals 1 And 2

      Courtesy of NISSAN NORTH AMERICA, INC.