VW Passat B5.5 Alarm issues - where are you tame mechanic

[Tom Standish]

Please help

the alarm on my passat 2003 will go iff at random and its really annoying

usually when i would lock it with the key fob the lights would flash to say it was locked.
its stopped doing this and now the alarm goes off at random.

Anyone got any ideas?

Someone said on his corsa you could do things like press a pedal and turn a key and it would list erro codes? can this be done on a passat?

PLEASE HELP

[martycossie]

passager foot well remove trim on the left side there grey conecter discont as they cored give clean

[4mo]

Possibly an issue with the comfort ecu (controls windows, central locking etc) located under the carpet below the passenger seat.

Very susceptible to issues if you have had water in the car (are there any passats that haven't) due to bulkhead drains blocking.

[Tame Technician]

Could well be the convenience module full of water.

If other convenience functions (interoir lights, electric windows, central locking etc) stop working, you know its a fault with the module.

It could be anything on the security system making it go off, fault bonnet or door open switch or oversensitive interior monitorying for example.

Only way to know whats setting it off is to have the fault memory read.

[BelperJim]

After re-closing the Doors, Boot and Bonnet the alarm did not go off again. This is however a recurring problem. This would suggest to me that it is one of the switches. Any suggestions for troubleshooting this?

(I'm a friend of Toms by the way )

[Tame Technician]

Tame Technician said:

Only way to know whats setting it off is to have the fault memory read.

If it says alarm triggered by boot open signal, then its the boot switch, if it says door, probably the door. If there all random, then its going to be much harder.

[Standish]

awesome cheers for the advice guys much appreciated

how is best to read the faults? can you do it yourself or do you need to take it to a garage?

[Tom Standish]

looked under the carpet of the passenger footwell and low and behold full of water

luckily not that bad so dried it all out and no more alarm issues - awesome!

CHEERS GUYS