Door Lock/Unlock Switch Check

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

CHECK DOOR LOCK/UNLOCK SWITCH INPUT 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 the figure below can be detected during 10 seconds just after the door lock/unlock switch is turned to LOCK or UNLOCK.

TERMINALS VOLTAGE CHART

Connector	Terminal		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 And Ground With Oscilloscope

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 BCM OUTPUT SIGNAL
Check ("POWER WINDOW DOWN") in ACTIVE TEST mode for "MULTI REMOTE ENT" with CONSULT-III. Refer to "ACTIVE TEST ".

When "ACTIVE TEST" is performed, are the front windows lowered?

Yes or No

Yes: GO TO 3.

No: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".

Fig 2: CONSULT-III Display - ACTIVE TEST
Courtesy of NISSAN MOTOR CO., U.S.A.
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 D7 terminal 15 (without automatic back door system) or D8 terminal 17 (with automatic back door system) and ground.
  15 - Ground : Continuity should exist.
  
  17 - Ground : Continuity should exist.
  
  Fig 3: Checking Continuity Between Main Power Window And Door Lock/Unlock Switch Connector Terminals 15, 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.
OK or NG

OK: GO TO 4.

NG: Repair or replace harness.

Fig 4: Checking Continuity Between Power Window And Door Lock/Unlock Switch Terminal 11 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
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 12 (without automatic back door system) or terminal 14 (with automatic back door system).
  22 - 12 : Continuity should exist.
  
  22 - 14 : Continuity should exist.
  
  Fig 5: Checking Continuity Between BCM Connector Terminal 22 And Door Lock/Unlock Switch Connector D7 Terminal 12 Or 14
  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.
OK or NG

OK: Replace main power window and door lock/unlock switch or power window and door lock/unlock switch RH. Refer to "REMOVAL AND INSTALLATION ".

NG: Repair or replace harness.

Fig 6: Checking Continuity Between BCM Connector Terminal 22 And Power Window And Door Lock/Unlock Switch Connector Terminal 16
Courtesy of NISSAN MOTOR CO., U.S.A.