Xoutpost.com - Alarm going off whenever it wants... HELP!

Xoutpost.com (https://xoutpost.com/forums.php)

- X5 (E53) Forum (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/)

- - Alarm going off whenever it wants... HELP! (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/33917-alarm-going-off-whenever-wants-help.html)

Quote:

Originally Posted by redvault (Post 856805)

I took the switch off but can't figure out how to dismantle it ti get to the metal pin. Can you please how this is done? Thanks.

sorry for the delay. No problem. When i get home ill take some pics of how to do it.

I know this is an old thread, but I have been trying to solve a mystery and this thread had some of the best options. But I still have a problem.

Alarm goes off randomly.
Replaced 7 year old battery on 11-30-13
Disconnected and removed hood sensor 12-01-13

Figured that was it... NOPE, about an hour later the alarm went off again.

Anything else I can try before bringing it to an expert...?

ed

Quote:

Originally Posted by edco (Post 967230)

The poor little hood switch always gets blamed...but it is in a location that can cause it to deteriorate over time.

But since a new battery didn't fix the problem...and disconnecting the hood switch didn't fix the problem...then look to other monitors in the DWA (anti-theft alarm siren) system that may be setting off the false triggering.

The problem could also be the siren itself...especially if the vehicles battery was failing over a period of time. The alarm siren's internal battery may have not have been getting charged during this period and now it could be failing... causing the false alarm triggers.

You can also take a look at the DWA red LED (the clown nose below the rear view mirror) to see if it is signalling an open monitor/sensor. See the chart below...lock the vehicle and take note of how the red LED is flashing:

http://bimmerboard.com/members/q/ori...us%20Flash.jpg

And read through the info below on the DWA system...all the monitors of the system are listed...and again, check the red LED to see if one may be open. If all else fails...hooking up to BMW DIS (diagnostics) will indicate which sensor is registering fault codes.

http://bimmerboard.com/members/q/ori...tem%20Info.jpg

(you have no signature that reveals what model/model year/build date you have...but the alarm siren location may be different in some of the face-lift models)

http://bimmerboard.com/members/q/ori...System%201.jpg

http://bimmerboard.com/members/q/ori...System%202.jpg

That is a great fix. But I had a similar problem with my X5,3.0,01 a few years back and it turned out to be the 5 year old battery. Replaced it and everything has been fine since.

It appears ( at least sofar ) that the tilt sensor was the problem. Been disconnected since Wed without a failure, but tonight it gets down to the cold temps we were getting last week, so I'll have a higher level of confidence that that is where the problem lies.

Thanks for the input

Ed