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[colin33]

HI Guys,

Hope you can help with this little puzzle...
This relates to my 2001 2.2 petrol Omega estate....

Last week the passenger door wouldn't lock or unlock most of the time with the central locking system, except every now and again it would operate correctly.

This week (today) none of the doors work from the central locking.  I can open the drivers door with the key, and the passenger door by pulling up the lock button, but I can't open either of the rear doors at all - the buttons won't come up manually.

I can open the tailgate with the key, except I have to leave the key in the lock with it fully round clockwise and press the button to release the catch.

The key is synchronised - I can still set/unset the alarm with the key, but no doors open.

I don't know if this is connected but the drivers door window raise lower button has stopped working as well, but all other windows and mirror adjustments work OK.

My thoughts - it is unlikely that all door motors have suddenly failed.  Could be a central controller fault, but I don't know how this bit works or what to do about it.  Possibly a wiring fault in the drivers door, but why would the passenger door start playing up?  And why wouldn't the rear doors continue to work?  Is there a central controller for the locking system that is u/s?

I have scanned the forum but not found anything similar, so any thoughts and assistance welcomed.

Colin

[Welung666]

Hi Colin, passenger side solonoid could be playing up to cause that door not to unlock. Stands a good chance the drivers door solonoid has a problem to as that has an extra microswitch inside to control the other doors. Could just be damp in the loom plug.

As you're not far away (I think Shipston-ish with the postcode) you could pop up and I'll have a look for you. I'm 10 minutes off junc. 4 of the M5

[tunnie]

http://www.omegaowners.com/forum/YaBB.pl?num=1175610013

[colin33]

Hi Colin, passenger side solonoid could be playing up to cause that door not to unlock. Stands a good chance the drivers door solonoid has a problem to as that has an extra microswitch inside to control the other doors. Could just be damp in the loom plug.

Thanks for this - where are the solenoids?  Are they part of the motor or elsewhere (these cars seem to hide bits all over the place!).
p.s. have moved a little further away than Shipston so thanks for the offer of help but I'm Dorset-based now (I must update my profile!)

Colin

[tunnie]

Hi Colin, passenger side solonoid could be playing up to cause that door not to unlock. Stands a good chance the drivers door solonoid has a problem to as that has an extra microswitch inside to control the other doors. Could just be damp in the loom plug.

Thanks for this - where are the solenoids?  Are they part of the motor or elsewhere (these cars seem to hide bits all over the place!).
p.s. have moved a little further away than Shipston so thanks for the offer of help but I'm Dorset-based now (I must update my profile!)

Colin

Click my link above

[colin33]

Hi Colin, passenger side solonoid could be playing up to cause that door not to unlock. Stands a good chance the drivers door solonoid has a problem to as that has an extra microswitch inside to control the other doors. Could just be damp in the loom plug.

Thanks for this - where are the solenoids?  Are they part of the motor or elsewhere (these cars seem to hide bits all over the place!).
p.s. have moved a little further away than Shipston so thanks for the offer of help but I'm Dorset-based now (I must update my profile!)

Colin

Click my link above

Thanks Tunnie, but to clarify - is the solenoid the motor or is there another part I should be looking for?

Colin

[Dave DND]

Solenoids are frequently called CDL Motors

Same thing - Same fault - Same replacement remedy

 

[colin33]

Thanks Guys,  all good stuff, and it looks like I am pulling the old bus apart at the weekend.

But before I get stuck in....given that none of the doors work from the central locking, I can open the drivers door with the key, and the passenger door by pulling up the lock button, but I can't open either of the rear doors at all - the buttons won't come up manually.  I can open the tailgate with the key, except I have to leave the key in the lock with it fully round clockwise (to about 110 degrees) and press the button to release the catch, leaving the key in it.

All this happened at the same time, so it all sounds like a single fault to me.  Makes me think that maybe one of the following is at work here -
1) as welung666 said the drivers side motor is u/s and is affecting all the doors
2) one of the motors is stuck where it shouldn't be and is affecting the whole system
3) there is a wiring fault in the drivers door that is affecting the whole system
4) there is a central ECU I have seen reference to that is u/s. But what and where is this?
5) there are 2 relays behind the glove box that I have seen reference to in the forum one or both are u/s

Any comments and guidance before I start digging would be welcome.  Thanks.

Colin.

[colin33]

I've just read Humpy's item about spurious events and Dave's reply that a low battery can cause all sorts of strange things to happen - could this be the problem here with my door locking failures?

[Dave DND]

most likely cause of your problem is a solenoid failure - either sticking or knackered

replacement is straightforward 

[tunnie]

as above, soleniod has failed. Usually only goes on the front 2 doors, as they get used the most (or slammed the most  )

Rears don't tend to go, as the doors are not used as much.

[colin33]

Thanks Guys, I'll strip it down and see what I find.

Colin.

[colin33]

Hi Guys,

Help please with getting the right replacement part before I strip the door down.

Tunnie's link quotes part number 90493702.

I have found two different versions - one claims to have this number and be from a Corsa with a 5 pin round plug.  Another claims to be part no. GM904493702 with a 3 pin plug.

Which will fit?

Colin

[colin33]

Hi again guys - still help needed with my central locking...

Previous advice suggested the motors needed changing which I have now done (both passenger and drivers front door motors) but this has not solved the problem.  In fact it has made no difference at all.

The problem remains that the central locking does not work at all - either by the key or by moving the internal lock.  And on any of the doors or the fuel cap.

I press the key to open and the alarm is cancelled, press to lock and the alarm sets, but that is all.  When I lock the car using the door lock and key the alarm sets.  So this part seems to be working OK.

So it looks to me like there is a common point which has failed, so is there a circuit board that operates the central locking or a relay that makes it all work?  If so where are they and what am I looking for?

Next step if this fails is to go to the main dealer and I really don't want to do this!!

Colin