Central locking unlocking itself

[phey708]

Hi i have this wierd and stupid problem with my central locking on my Seat Ibiza 1998 model.

Everytime i try and lock all the doors with the key, about 2 seconds later everything unlocks itself again for some reason. At the moment i am having to manually lock the doors one by one. Does anyone have a solution to this bugging problem? I might be right in thinking that one of the motors somewhere is failing, and as a result the central locking system thinks that a door is open when its not.

 

[truCido]

you got it spot on

 

[phey708]

Is there anyway that i can disconnect the motor from each door in my car to help narrow down which motor is being a spaz? Does anyone know how i can disconnect each motor from each door?

 

[Fl@pper]

system is pneumatic and runs on air pressure regulation, if it's locking then unlocking again then it is sensing a jammed lock somewhere that is building up pressure too quick

check out the pump in the driver rear 1/4 and unplug em to test each circuit to narrow it down

there's loads of threads listing what does what and others solutions/problems too

it will be pneumatic so there isn't really a schematic available as such

the motor may work but it's pressure sensitive

easiest way i have found to test them is dosconnecting all the hoses and operating the motor both lock/unlock and in doing so it will run for a while until you blobk the pipe off that way you know as a base line it's ok

add each pipe in turn to test each supply line and i think if you have a search i worked out the colours to what lock etc but ill look and see (found it)

from the junction in the OSR 1/4 (behind the rear lamp)

red is fuel flap solenoid (common to leak)
blue is doors
black is boot lock
green is supply from motor to junction pipe

pop em off one by one and test by suck/blow down em doesn't take much pressure to make em work and a scrap bit of washer pipe or fuel hose is handy unless you can squeeze a small childs head in the corner as i had no pipe to hand

any one of those seals split/broke or incorrectly working and the motor will go all day doing nothing

 

[phey708]

Cheers i will give that a try this saturday and see how i get on lol.