1. Check Door Lock/Unlock Switch Input Signal

With CONSULT-II

Check door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MONITOR mode in CONSULT-II. Refer to DATA MONITOR 

• When door lock/unlock switch is turned to LOCK:
  1. CDL LOCK SW: ON 
• When door lock/unlock switch is turned to UNLOCK:
  1. CDL UNLOCK SW: ON 

Fig 1: CONSULT-II Display

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

Without CONSULT-II

1. Remove key from ignition key cylinder.
2. Check the signal between BCM connector M18 terminal 22 and ground with oscilloscope when door lock/unlock switch is turned to LOCK or UNLOCK.
3. Make sure the signals which are shown in the figure below can be detected during 10 seconds just after the door lock/unlock switch is turned to LOCK or UNLOCK.

Fig 2: Signal Chart

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

Fig 3: Checking Signal

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

OK or NG 

1. OK >> Door lock and unlock switch circuit is OK.
2. NG >> GO TO 2.