Repetitive alarm problem

[rednblack]

Has anyone experienced a problem with the alarm where it repeatedly goes of every 5 minutes or so? The weird thing is the lights don't flash either.

The first couple of times (when I heard it, cos it's fairly quiet) I looked out the window and thought it was another car down the road, but today I happened to be at the door when it went off.

If i deliberately set the alarm (by leaving the windows down before locking and then waving inside the car to set the motion sensors) the lights do flash - but not when I just leave it locked!

I've disconnected the battery so my neighbours can get some sleep, and so far it hasn't activated - but this obviously isn't ideal.

Any help or advice would be welcome. Cheers!

[kenney]

You need a fault code read to see what is activating the alarm

[benjie]

As above, a VCDS scan would probably tell you where to look.

With MkIV Golfs this was a common problem - washer water woul leak into the rear boot lock and send confusing signals to the ECU as to what's goin on and set the alarm.

Sounds similar here. If the lights don't flash, that's the car telling you it's not secured. The door LED may stay on permanently for a few seconds when you lock it too. Open all the doors and see if any of the door lights are out - this may be a clue as to what's causing the problem.

[rednblack]

Thanks for your replies - since I've reconnected the battery it seems to be ok, but I will see about getting a scan done anyway - does anyone know anywhere in the Bournemouth area who can do this?

Also, the lights flash when I lock the car, so everything seems to shut and lock up properly, but the interior light does not come on when either of the back doors are opened. Is this correct?

[bagpipingandy]

Thanks for your replies - since I've reconnected the battery it seems to be ok, but I will see about getting a scan done anyway - does anyone know anywhere in the Bournemouth area who can do this?

Also, the lights flash when I lock the car, so everything seems to shut and lock up properly, but the interior light does not come on when either of the back doors are opened. Is this correct?

I Had the same issues on my A4,

the alarm sounding was dud batteries in the alarm sirin unit (in the boot RH side) before repairing, I disconnected it for a while to prevent the alarm going off & previously had to leave the car unlocked,

The interiour lights should come on with the rear doors & could be a few things but it all could be pointing to a faulty CCM under the passanger seat, This can be due to water ingress from the Plenum Chamber, I aslo had a faulty CCM (seperate issue from the alarm sounding) but yours could be linked,

To check the interiour lights do the rear doors opened show up in the DIS in the centre of the dash? if so this means the micro switches are working and is more likely a CCM fault, A code read will confirm a CCM fault with a "no communuication" error.

The alarm sounding may also be due to a faulty CCM (fault code read, required) or flat battery's in the sirin unit, see a link to repair,

https://www.vwaudiforum.co.uk/forum/s...ad.php?t=49828

Andy

[Owly]

I can thoroughly recommend APD in Holton Heath for any repairs to your VAG vehicle.

http://www.apdperformance.co.uk/


Regards,


Owly

[rednblack]

Thanks again for your replies.
Alarm seems to be behaving itself but I did check the rear doors on the dis. They do show up but they flash rapidly - I'm not sure if this means anything.
I guess a scan will tell me more.

[bagpipingandy]

Thanks again for your replies.
Alarm seems to be behaving itself but I did check the rear doors on the dis. They do show up but they flash rapidly - I'm not sure if this means anything.
I guess a scan will tell me more.

Strange faults like this could point to the CCM failing, i have not heard of the DIS doors open flashing?!! A fault scan of CCM will shed some more info,

what does the red LED on the Drivers door do when locked?

Andy

[rednblack]

OK, I got a scan done today and they came up with the following faults:

(1134) Alarm Horn -H12
Short to Earth
(Sporadic fault)

(1134) Alarm Horn -H12
No Communication
(Sporadic Fault)

(1561) Rear Left Door
Does not disengage
(Sporadic Fault)

(1561) Rear Left Door
Deadlock does not disengage

(1562) Rear Right Door
Does not disengage
(Sporadic Fault)

(1561) Rear Right Door
Deadlock does not disengage

They told me I need a new alarm horn and wiring - total cost £138.60. Does this sound correct and a reasonable price?

Also, I experienced a slight lack of power in the accelerator on the way over (weather was wet) so asked them to look at that. They suggested it was due to the clutch slipping, which it wasn't (the revs weren't high when experiencing the lack of power) and said the alternator belt was about to snap and needed to be replaced asap. As I need to drive to London next week I got them to do it - they charged £180.84 (including the diagnosis) - is this reasonable for approx. 1.5hrs labour and a £12.50 part?

They seemed to know their stuff, but being a complete novice I'm not so sure. (By the way, it didn't cure the fault but car was fine when it dried up later on - could it be due to damp getting in somewhere?)

Thanks again.

[bagpipingandy]

A new Alarm horn is around £80-90 from Audi. Not sure what the wiring they are quoting as the car wiring harness just plugs straight into the horn, but also not sure about the rear door fault codes you are getting, perhaps the doors have broken/damaged wiring, and need replaced, so the £138 including wires? would be about right, but does this include fitting?

The link I showed you shows how to add batteries to the alarm sounder for around £20, as this is all that is required to fix it, but it does require some DIY botching in order to replace them!!, Audi just change the whole unit.

the cost to fit the belt may depend on how complex the engine is to get at such belt, what engine do you have?

Andy