As far as I know, ther is nothing you can do yourself to make the alarm chirp. If it can be done, then it would need to be done by a dealer on your particular car.

If it occasioinally chirps at you at the moment, it means something is open when you lock it, i.e the rear boot is ajar if you try to blip lock the car. So don't walk away if you hear a toot on the horn, it means something is open!

Its all in the manual if you want to read about it.

JZ