Front Door Key Cylinder Switch Check

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FRONT DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)
With CONSULT-II

Check front door key cylinder switch ("KEY CYL LK-SW"/"KEY CYL UN-SW") in "DATA MONITOR" mode with CONSULT-II.

Fig 1: Checking Front Door Key Cylinder Switch Input Signal (Lock/Unlock Signal) - With CONSULT-II
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II
1. Check the signal between smart entrance control unit harness connector M122 terminal 33 (BR) and ground with oscilloscope when key inserted in front key cylinder is turned "LOCK" or "UNLOCK".
2. Make sure signals which are shown in the figure below can be detected during 10 sec. just after key is turned "LOCK" or "UNLOCK".
  
  Fig 2: Checking Front Door Key Cylinder Switch Input Signal (Lock/Unlock Signal) - Without CONSULT-II
  Courtesy of NISSAN MOTOR CO., U.S.A.
Refer to wiring diagram in WIRING DIAGRAM - VEHSEC .

OK or NG
1. OK: Front door key cylinder switch LH is OK.
2. NG: GO TO 2 .
CHECK FRONT DOOR KEY CYLINDER SWITCH
1. Disconnect front door key cylinder switch LH connector.
2. Check continuity between front door key cylinder switch LH terminals.
  
  Fig 3: Checking Front Door Key Cylinder Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Check the following.
  - Front door key cylinder switch LH ground circuit
  - Harness for open or short between power window main switch and front door key cylinder switch LH
2. NG: Replace front door key cylinder switch LH.