2004 mazda mpv sliding door will not unlock from inside or by remote, manual lock mechanism works up & down when unlocking other doors but will not open.

this features does not exist so says 360page lost users guide and
samehere


https://www.justanswer.com/mazda/4eexf-mazda-mpv-dx-door-locks-2001-mazda-mpv-fowled.html

This is a wild guess, but it sounds like the switch that controls the door is constantly trying to open the door. It could be the door switch. Try locking the door with the door switch and then hold the lock slightly down to see if it is a mechanical failure in the switch. If not, the remote system may be sending the unlock. You could always pull the fuse for the automatic locks and see if the key will lock/unlock without problem. But then you'd never have remote entry.

if you talking about door latch wont let door close.try to reset all door locks.first if you cant get door close.work unlock button with remote or door switch.then hold open door handle while you flat screw driver pull up latch in door latch should stay up so door will close.once get door close.try resetting all door locks by sitting inside vechicle with all doors close.remove key from ignition.open drivers door.wait 24 seconds.turn ignition switch on and back to lock position 3 times.press and release drivers door courtesy light 3 times.ensure doors lock and unlock.if not wait 40 seconds and repeat procedure.if this procedure fails. you have problem in the door latch and lock mechanism inside the door itself.

remove the solenoid and manually unlock the door. Sounds like the solenoid is jammed.

Your latch assembly may be frozen, or the door actuator faulty (a common problem on this vehicle).

Check out the following forum posts:

The basic problem:

http://forum.mpvclub.com/viewtopic.php?t=24351&highlight=door+actuator

Photos of the latch assembly:

http://forum.mpvclub.com/viewtopic.php?t=16431&highlight=panel+door+locked

How to disassemble the door panel (if you can open the door!):

http://www.mpvclub.com/diy.php?id=8

Programming
When
Remote control added or replaced. System malfunction.
How
Obtain all remote controls. Remove key from ignition switch. Close all doors. Open driver's door. Carry out the following within 24 seconds: Turn ignition switch ON and back to LOCK position 3 times. Remove key. Press and release driver's door courtesy light switch 3 times. Ensure doors lock and unlock. If not, wait 40 seconds and repeat procedure starting with driver's door already open. Press each remote control lock or unlock button twice. Ensure doors lock and unlock after each remote control operation. If not, proceed as follows: Press and release driver's door courtesy light switch once. Ensure doors lock and unlock twice. Repeat procedure starting with driver's door already open.
NOTE: A maximum of 3 remote controls can be programmed.

I'm assuming the locks work fine with the key. If so, it sounds as if the electric lock motor is bad or the unlock wire is broken. You would have to take door panel off and check with a test light to find what the exact problem is.

try putting key in ignition turn to on position
then press lock & unlock several times slowly if door locks cycle up & down after 1st press it lost code and is now resynconised.
now try remote with all doors closed and key out of ignition
if this dont work need to register key(program)back into system which dealer must do with Tech2 if round heart shapped remote

Courtesy of: forums.mazdaworld.org

Try this, it works on several 2002 models:


Step 1: Open drivers door and leave open.

Step 2: Lock and unlock the drivers door using the power door lock switch on the door.

Step 3: Insert key into the ignition.

Step 4: Turn key to on position and return to off position. (IMPORTANT - use ON position NOT ACC position). Do this 3 times within 10 seconds. Leave key in the ignition.

Step 5: Open and close the drivers door 3 times. (Door should be left open after this step).

Step 6: ECU should respond by locking and unlocking the doors.

Step 7: Press any button on remote #1. ECU responds by locking and unlocking the car doors.

Step 8: Press any button on remote #2 (etc.) Each time the ECU will respond by locking & unlocking the doors.

Step 9: Remove the key from the ignition and the ECU will respond a final time with a series of door locks and unlocks. You're done