Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK FUSE 

   Check if the key switch and key lock solenoid (key switch) 10A fuse [No. 3, located in the fuse block (J/B)] is blown.

   Is the fuse blown? 

   YES: Be sure to repair the cause of malfunction before installing new fuse.

   NO: GO TO 2

2. CHECK BCM INPUT SIGNAL 

   Check voltage between BCM harness connector M18 terminal 37 and ground.

   Terminals			Condition	Voltage (Approx.)
   (+)		(-)
   BCM connector	Terminal
   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: Inspection End.

   NO: GO TO 3

3. CHECK KEY SWITCH AND KEY LOCK SOLENOID (KEY SWITCH) CIRCUIT 
   1. Disconnect BCM connector M18 and key switch and key lock solenoid (key switch).
   2. Check continuity between BCM harness connector M18 terminal 37 and key switch and key lock solenoid (key switch) harness connector M27 terminal 4.

      BCM		Key switch and key lock solenoid (key switch)		Continuity
      Connector	Terminal	Connector	Terminal
      M18	37	M27	4	Yes

   3. Check continuity between BCM harness connector M18 terminal 37 and ground.

      BCM		Ground	Continuity
      Connector	Terminal
      M18	37		No

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Repair or replace harness.

4. CHECK KEY SWITCH AND KEY LOCK SOLENOID (KEY SWITCH) POWER SUPPLY CIRCUIT 

   Check voltage between key switch and key lock solenoid (key switch) harness connector M27 terminal 3 and ground.

   Terminals			Voltage (Approx.)
   (+)		(-)
   Key switch and key lock solenoid (key switch)	Terminal
   M27	3	Ground	Battery voltage

   Is the inspection result normal? 

   YES: Replace key switch and key lock solenoid (key switch).

   NO: Repair or replace harness.