Diagnosis Procedure

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

1. CHECK DOOR KEY CYLINDER SWITCH LH

   With CONSULT

   Check front door lock assembly LH (key cylinder switch) ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in DATA MONITOR mode with CONSULT.

   • When key inserted in left front key cylinder is turned to LOCK:

     KEY CYL LK-SW: ON 

   • When key inserted in left front key cylinder is turned to UNLOCK:

   KEY CYL UN-SW: ON 

   Without CONSULT

   1. Turn ignition switch OFF.
   2. Check voltage between main power window and door lock/unlock switch connector D7 terminals 4, 6 and ground.

      Connector	Terminals		Condition of left front key cylinder	Voltage (V) (Approx.)
      	(+)	(-)
      D7	4	Ground	Neutral/Unlock	5
      			Lock	0
      	6		Neutral/Lock	5
      			Unlock	0

      Fig 1: Checking Voltage Between Main Power Window And Door Lock/Unlock Switch Connector D7 Terminals 4, 6 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Key cylinder switch signal is OK.

      NO: GO TO 2

2. CHECK DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
   1. Turn ignition switch OFF.
   2. Disconnect front door lock assembly LH (key cylinder switch).
   3. Check continuity between front door lock assembly LH (key cylinder switch) connector D14 terminal 4 and body ground.

      Connector	Terminals	Continuity
      D14	4 - Ground	Yes

      Fig 2: Checking Continuity Between Front Door Lock Assembly LH Connector D14 Terminal 4 And Body Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace harness.

3. CHECK DOOR KEY CYLINDER SWITCH LH

   Check continuity between front door lock assembly LH (key cylinder switch) terminals.

   Terminals	Condition	Continuity
   3 - 4	Key is turned to LOCK or neutral.	No
   	Key is turned to UNLOCK.	Yes
   4 - 5	Key is turned to UNLOCK or neutral.	No
   	Key is turned to LOCK.	Yes

   Fig 3: Checking Continuity Between Front Door Lock Assembly LH Terminals

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal? 

   YES: GO TO 4

   NO: Replace front door lock assembly LH (key cylinder switch). Refer to "REMOVAL AND INSTALLATION ".

4. CHECK DOOR KEY CYLINDER HARNESS

   Check continuity between main power window and door lock/unlock switch connector D7 (A) terminals 4, 6 and front door lock assembly LH (key cylinder switch) connector D14 (B) terminals 3, 5 and body ground.

   Connector	Terminals	Connector	Terminals	Continuity
   A: Main power window and door lock/unlock switch	4	B: Front door lock assembly LH (key cylinder switch)	5	Yes
   	6		3	Yes
   	4, 6	Ground		No

   Fig 4: Checking Continuity Between Main Power Window And Door Lock/Unlock Switch Connector (A) Terminals And Front Door Lock Assembly LH Connector (B) Terminals And Body Ground

   Courtesy of NISSAN NORTH AMERICA, INC.

   Is the inspection result normal? 

   YES: Replace main power window and door lock/unlock switch.

   NO: Repair or replace harness.