How do I stop the alarm going off Xantia II

[CitroJim]

The pics didn't expire, they were lost during a forum transition/upgrade recently, along I suspect with all other pictures that were forum attachments rather than links to external photo hosts..

Yes, sorry

It certainly was an artefact of that migration. Won’t happen again. lesson learned

[Rhothgar]

Most likely the ultrasonic transducers. Try setting with them disabled. press the alarm reset/ultrasonic disable button (the one with a crossed-out speaker symbol on it) just after switching off the ignition. Hold the button until the LED by the driver's door mirror (the one the normally flashes when the alarm is set) lights up solidly. Now lock normally.

If the alarm is now happy then QED..

A Lexia diagnostic will read the last 15 alarm triggers to aid your discovery of the cause.

The next best culprit is the boot switch. This is a little switch that is operated when the boot is shut. The brown connector for it can be found just under the boot carpet near the lock hasp. Disconnect the brown plug and the switch will be inoperative and will appear to the ECU as if the boot is always shut. The bonnet has a similar one.

Does the alarm 'peep' on setting? If it does then this indicates one circuit or another is faulty and the alarm is not setting correctly.

Who'd have thunk that 14 years later this might prove useful to me.

Thanks Jim.

I managed to get remote central locking working yesterday and was pleased as punch until it woke me up at 7:35am (which, I appreciate, is a lie-in for you!).

Went into CPH configuration in Lexia this morning and pressed F4 No when siren came up but alarm has just gone off again to that wasn't the fix. Shall see what Lexia says about the boot and bonnet switches.

[Rhothgar]

Lexia locks down the operational side of things when you are serialed into the respective ECU.

All switches are working apart from the bonnet switch (which doesn't exist in the Workshop Manual). All others are operating fine.

The switch was a bit ropey so treated that to some contact cleaner and all was good.

Because I've never used it I imagined that the switch would stay 'in' when pressed but it doesn't. That's probably correct. The light isn't lighting and I noticed that the voltage was only 9.75V so possibly some damage or high resistance in the wire.

Could see how to quick the bulb. Couldn't get to it. Will have a scout around the forum.

Keen to get all outstanding issues sorted on the car.

[Rhothgar]

And thanks to Mandrake.

I've cleared of a cobweb on the transmitter on NS Door. Maybe a quiescent spider came out of its slumber...

If not, it looks like I'll be swapping them out.

[CitroJim]

Maybe a quiescent spider came out of its slumber...

Is that a new species Roger? Hope they're not dangerous...

If not, it looks like I'll be swapping them out.

Yes, they do fail as they're in a quite hostile environment - lots of damaging sunlight and massive temperature swings...

To get an idea, see what that does to speaker cones after several years...

[Rhothgar]

Maybe a quiescent spider came out of its slumber...

Is that a new species Roger? Hope they're not dangerous...

If not, it looks like I'll be swapping them out.

Yes, they do fail as they're in a quite hostile environment - lots of damaging sunlight and massive temperature swings...

To get an idea, see what that does to speaker cones after several years...

It stayed silent overnight so the contact cleaner on the ultrasonic switch seems to have done the job coupled with pressing it on exit. Do you know if it persists after car unlocking ie if I unlock and door, does it persist? If I unlock and open a door, close and lock again, does it re-enable or does it only re-enable once the engine has been started or key put in the ignition?

You've got to appreciate that working remote central locking and alarm configurations is ultra hi-tech for me.

[mickthemaverick]

You've got to appreciate that working remote central locking and alarm configurations is ultra hi-tech for me.

Says the man who spends his evenings delving into EEPROMS and ECU software!!

The evidence is here!!

[Rhothgar]

You've got to appreciate that working remote central locking and alarm configurations is ultra hi-tech for me.

Says the man who spends his evenings delving into EEPROMS and ECU software!!

The evidence is here!!