Alarm keeps going off !!
 

HELP!

My alarm keeps going off every 2 minutes.. I have now had to lift the bonnet and disconnect the alarm; it stopped beeping when I lock the car for some reason.( Confirmation Via Beep) and a couple of nights ago this started, and last night was the worst night’s sleep ever.. in the end at 3:30am I went out with screw driver in hand disconnected it" Much to my neighbours Joy" and proceeded back to bed with a high pitched noise whaling away inside my head for the forth coming hour ...

Any advice... I will Vag it later this evening and see what’s going on but has this happened before?
:Confused:

if you had any of the doors or boot ajar then that may have been the cause, or failing that it can be the back up battery in the alarm horn running low

Hmm but I have soft close.. it would just close the car, do they have a battery in the alarm do they?

If its the same as a D2 alarm horn they are "sealed for life" alarm horns with a battery in that eventually dies so you have to get hold of another one second hand with a better battery ideally or buy a new one :(

The car should beep? All my Audi's are silent :Confused:. I only get the visual 2 flash for open, 1 flash for lock.

I doubt that a low alarm battery would repeatedly sound with the car locked up; you need to plug in VCDS to see what has been triggered.

For reference/comparison a low D2 alarm battery will make it sound a few times shortly after you turn the ignition on.
I replaced the batteries in mine a while back but the "chirp" on locking is getting decidedly pathetic now.....:-(

All configurable. ;)

You can set it to chirp upon locking on Vagcom which a few of us have done on D3's

What module do you code? I did look for the option but not extensively.

Cheers

At a certain age (again, assuming the same alarm as a D2 '8), the battery also begins to leak, all over the alarm circuit board, causing all sorts of weird behaviour, until it eventually corrodes enough of the PCB to stop working altogether.

It's a very common problem I believe, for Audis in general. I replaced my alarm unit recently (with a brand new one), after opening it up to find something like this, only mine was worse, and far beyond repair.

Try this:-
forum.a8parts.co.uk/attachment.php?attachmentid=9549&d...

My D3 is now in its third alarm siren, I replaced the first one with using a secondhand one from A8parts. The second one failed also after a couple of months, now on my third and touch wood this has been fine so far.

The leaking batteries can cause all sorts of weird issues, as the acid leaks onto the main PCB and eats/short circuits tracks along the way.

Disconnecting the siren seems to stop the car going fully to sleep, so you need to sort this sooner as you'll be getting excess current draw with the car left alone.

Although less prone to battery issues, the D3 which uses the later alarm sirens is not immune it seams.

That's brilliant thanks, I'm quite familiar with vcds but a bit rusty as iv just jumped ship from bmw and inpa/dis, it's nice to have data logging back with vcds as its not available with inpa and makes problem solving on your own very difficult :-(

If it is the same part as a D2, a new one cost me £102 back in October. Plus another £57 to repair the mullered/corroded plug as the battery acid had eaten the terminals AND the plastic plug! The wiring on the D2 is ridiculously short so I bought 3 repair wires and a new plug and had my local indy make the joins as it really needed 2 sets of hands.

Mine did the 3 chirp on ignition on twice before i replaced it and it was already way too late....

I don't think it logged a fault code, but if it's going off it should record what the trigger was, unless the unit is shorting and setting itself off?