V70: Central Locking Party

[Mr D]

A daring first post - central locking on my V70 is having a party (without me I might add) and after M-R-P got me on the forum I've lurked for long enough - question time oh oracles of truth - sanity check before asking questions involved

• Did a search on the forum
• Did a bit of googling for good measure
• Asked M-R-P
• Played hunt the fuse/relay
• Achieved total confusion

To explain better: lock the car and the following may (or may not) happen

• the front doors lock (but the back doors do not)
• the front doors lock but one of the back doors locks
• the front doors lock but the tailgate stays unlocked (I have lost a crate of beer to the midnight crazies this way )
• the car locks completely...leave for 5-10 minutes and one of the rear doors unlocks

Unlocking is a similar party

• Unlock the front doors, rear doors stay locked including tailgate
• Unlock the front doors, rear doors stay locked. Tailgate "half" unlocks (it catches before you can fully open it)
• Unlock the front doors, push the "lock button" on the driver's door and let it force the doors - this normally fixes the tailgate but rarely fixes the rear doors

Immobiliser has eaten a key already (not too bothered but I am down to the last one) and the alarm is only just alive ie it goes off when it shouldn't rather than when it's set.

So there we go - crazy central locking party - any suggestions to diagnosing this one or, if it comes to it, how I change it back to manual locking and still use the car?

[M-R-P]

Ello dude!
Finally made it then
Just to add to this...
the car had a whack down one side from a van, we changed the two affected doors - locks, windows 'n' all (see thread I started a while back) but nothing changed. I've looked for the central locking reset info but not found anything.
the alarm module is on it's way out but I don't think it can have an effect on the central locking (although it's a P2 and farting in the cabin at the wrong time can annoy it) I've not put the code reader to it you but I don't think the torque app will be able to read the door codes.

Any help you guys can offer would be brilliant.

[M-R-P]

I've just found this on VOC. It may work, if not there's another possibility...

Try performing a reset of the UEM (Upper Electronic Module), this controls the door locks and window operation:

- Close all of the doors and bonnet.
- Key in position II engine not running.
- Hold both the driver window and passenger window switches in the driver door panel in the closed or up position for 5 to 8 seconds after the windows are closed.
- Release buttons.
- Remove the ignition key.
- Operated the remote twice. lock/unlock lock/unlock.

This will reset the UEM brain. This can correct faulty operation of the sunroof and/or erratic door lock function.

Anybody tried this? All my locks etc work fine so no point in me trying it.

[Mr D]

Did that - the car hadn't "seen" my key fob for quite some time so while the problem isn't worse I do now have <whinge>alarm service needed</whinge> from the info system...

...ho hum