Citroen Xantia (1993 - 2000) - Alarm sounds within seconds of remote locking | Technical matters | Back Room Forum

Reviews
Best Cars To Buy
Ask HJ
- See all Ask HJ questions
Real MPG
- Find your Real MPG
- Best MPG Cars for 2025
News
Advice
Help & Tools
Free car valuation
- Get a FREE valuation
- How to sell your car
Cars For Sale
- Used cars for sale
- New cars for sale
Profile
Log out
Log in
New account

Sun 6 Jan 2008 21:09

Alarm sounds within seconds of remote locking - sb01

Hi Wise Ones
My Xantia has decided that the alarm is a lovely sound about five seconds after locking . . . I'm not convinced. Locking with the key - which doesn't activate the alarm - is fine, so I guess it's the alarm system itself.
Any suggestions where I should be looking for this noisy little gremlin?? - Don't really want to take it to a main dealer - cost will exceed the value of the car!
Thanks in advance for all of the answers I know will be forthcoming.

Reply | Report as offensive | Link

Sun 6 Jan 2008 21:37

Alarm sounds within seconds of remote locking - drivewell

Does the Xantia have ultrasonic sensors?. Possibly a failure there - might be able to disable if you can trace them on a wiring schematic.

Reply | Report as offensive | Link

Mon 7 Jan 2008 12:33

Alarm sounds within seconds of remote locking - RichardW

Yes, they have ultrasonic detectors (in the front doors, behind the door mirrors), and yes they go kaput and make the alarm go off. It's possible to set the alarm without them - press the alarm cancel button whilst turning the ingition off or something to test them.

Water ingress to the passenger foot well (via the heater intake duct) can also send the alarm haywire by soaking the ECU under the passenger seat (Mk1 cars).

Reply | Report as offensive | Link

Mon 7 Jan 2008 15:52

Alarm sounds within seconds of remote locking - sb01

Thanks for the steer - will look into the options suggested.
Might it be the key? I tried the spare key - hardly ever used in 8 years - and the locking and alarm worked first time . . . . but perhaps that was co-incidence. Any views?

Reply | Report as offensive | Link

Related questions

My new Audi Q5 hasn't come with the options that were promised - what do I do?

I have bought a new Q5 2017 and ordered some options on the car. However they aren't 100% complete as per list on the Audi website and brochure. I've paid for these options and now being told that that...

Should we reject our Land Rover Discovery Sport?

My sister bought a Land Rover Discover Sport two weeks ago. She went back to the dealer yesterday to have some scratches sorted out. However, when the car came back, we found that the scratches had been...

How much will it cost to fix my EcoBoost engine after the wet belt failed?

My Ford Fiesta with a 1.0 litre EcoBoost engine has engine noises and a low oil pressure message on the dash. My local garage has been servicing the car for the past 4 years and has never suggested a belt...

Can I get support from Ford over my wet belt failure?

The wet belt has gone on my 23 plate Ford Transit Custom. My warranty is up but is there any way I can get a good will payment from Ford and how do I go about it?