Door Lock/Unlock Switch Check

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR LOCK/UNLOCK SWITCH OUTPUT SIGNAL

With CONSULT-III

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

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

Without CONSULT-III

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

BCM CONNECTOR M18 TERMINAL 22 AND GROUND

Connector	Terminals		Voltage (V) (Approx.)
Connector	(+ )	(-)	Voltage (V) (Approx.)
M18	22	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 1: Checking Signal Between BCM Connector M18 Terminal 22 And Ground

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

OK or NG

OK: Door lock and unlock switch circuit is OK.

NG: GO TO 2.

CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch RH.
3. Check continuity between main power window and door lock/unlock switch connector D8 terminal 17 and ground.
  17 - Ground: Continuity should exist.
  
  Fig 2: Checking Continuity Between Main Power Window And Door Lock/ Unlock Switch Connector D8 Terminal 17 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between power window and door lock/unlock switch RH connector D105 terminal 11 and ground
  11 - Ground: Continuity should exist.
  
  Fig 3: Checking Continuity Between Door Lock/Unlock Switch Connector Terminal 11 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: GO TO 4.

NG: Repair or replace harness.
CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Disconnect BCM.
2. Check continuity between BCM connector M18 terminal 22 and main power window and door lock/unlock switch connector D7 terminal 14.
  22 - 14: Continuity should exist.
  
  Fig 4: Checking Continuity Between BCM And Main Power Window And Door Lock/Unlock Switch Connector Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between BCM connector M18 terminal 22 and power window and door lock/unlock switch RH connector D105 terminal 16.
  22 - 16: Continuity should exist.
  
  Fig 5: Checking Continuity Between BCM And Power Window And Door Lock/Unlock Switch RH Connector Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between BCM connector M18 terminal 22 and ground.
  22 - Ground: Continuity should not exist.
  
  Fig 6: Checking Continuity Between BCM Connector M18 Terminal 22 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK: Replace main power window and door lock/unlock switch or power window and door lock/unlock switch RH.

NG: Repair or replace harness.