Remote Battery Replacement / Alarm Problem

[lauro]

Can anyone assist my car is a 51 plate 2.0 xsara 5 door hatch HDI SX turdo diesel,

I need the procedure to reinitialize the key remote control after a new battery has been fitted, and I also have a problem with the alarm if I lock it with the remote the alarm will almost certainly go off at some point after leaving the car, if it is locked by the key in the door this problem does not occur.

The only pointers I can give are I have had a picture of what seems to be the bonnet open displaying on the dash display I was wondering if there is a switch on the bonnet that may be linked to the alarm system and that it could be a loose connection here or something else to do with the switch???? just strange that i have no problem with the alarm when I lock it manually with the key and it still and it still activates the alarm and immobilizer???  

 

any help greatly appreciated

thanks

 

Lauro.

[paul.h]

When you lock it with the key how do you know the alarm is activated ? The immobiliser only needs the key to be in the ignition switch to be seen by the car, so when the key is not in the ignition the immobiliser is set. If you lock the car with the remote and then unlock it with the key, does the alarm then go off which would show using just the key does not set the alarm.

 

 On our C5 there is a plunger switch under the bonnet on the front panel. It is pushed by the bonnet as it is closed for the alarm and bonnet open message - if you can find the one on your car it could be its internal contact is in poor condition/dirty or its electrical connector pins are dirty or it has a wiring fault. It may be part 63397 http://www.ebay.co.uk/itm/GENUINE-CITROEN-BONNET-LOCK-INTERRUPT-PART-NO-633927-FITS-VARIOUS-MODELS-/290965192094  To check if it is the switch that is the problem you could use a wire to bridge across its electrical connector and then try the alarm and see if the bonnet open message goes.

 

To initialise the remote, it should be something like - put the key in the ignition and turn it so the dash lights up, then immediately press and hold the lock button on the remote until the doors lock.