Alarm problem!

[swampy]

Hi, I'm a newbie to the site which by the way is superb.
I drive a Passat Tdi 130 2001 avant. my problem is the alarm keeps going off for no apparent reason! even if the doors are unlocked it can go off!
Some times it will stop on its own. other times you have to disable it with the key fob, which has a new battery in.
Any advice would be appreciated as its doing my head in now and the neighbours Cheers in advance.

[seren]

Hi buddie iv got the same car and mine does it as well it is so annoying i some times have to leave it unlocked on the road some nights as my neighbours play up as well i had mine put on a diagnostic machine to clear any code errors it worked for a while but came back

[kenney]

HI In measured value blocks for the comfort control unit display group number 15 gives information as to which component triggered the alarm system last, and can therefore help the fault finding/rectification
Possible sources of alarm

Boot lid/tailgate contact switch
1

Rear right rotary latch switch
2

Rear left rotary latch switch
4

Front passenger rotary latch sw.
8

Driver's rotary latch sw.
14

Ignition
16

Interior monitoring
32

Bonnet contact switch
64

Driver's rotary latch switch
128

No alarm
255

[TheMadhatter]

Check the passenger foot well and rear passenger foot wells for any dampness or water. Lift up the front passenger foot well carpet and check underneath and in the ccu box. Check up behind the glove box and the wiring loom and connectors behind the trim on the left hand side of the passenger foot well for any dampness.

Random electrics are quite often because of a water leak from the pollen filter. This gets on the wiring loom and into the ccu unit, and causes all kinds of randomness in the electrics. Mine was the same as yours, Alarm going off at random intervals for seemingly no reason.

[swampy]

Cheers for replys lads, i'll check out the problem areas that have been mentioned.

[swampy]

Fao KENNEY< can you explain in laymans terms what you mean in your post as i'm new to VWs. or can any body else help!

Cheers

[kenney]

With diagnostic equipment you can find out what has activated the alarm,the last 4 times,if you get a reading of 1 1 1 1 tells you it has been the tailgate contact switch which has activated the alarm 4 times, if you get a reading 1 1 1 2 then it has been activated 3 times by the tailgate switch and the last activation was by the rear right rotary latch switch,When you have a reading like this you can go right to the source of the problem.Hope i have made myself clear?

[swampy]

Thanks for reply, got you now now i just need to find some one with the diagnostic equipment Cheers

[swampy]

Just been checking around the car again, i checked the boot lid contacts and one of the saloon door style metal contacts was stuck back, so i've freed them both off and lubricated them, hopefully this could be my problem as the usual suspect of the water leak problem doesn't seem to be my problem as every where appears dry! fingers crossed