try the interior light switches on the doors
could be door switches sticking it could be the above but it appears that on Frontera's approaching 10 years old the power sounder which activates when the battery is disconnected becomes faulty. the main fault is with the batteries inside the unit, I have removed mine to revent it sounding in the middle of the night
You have to program the alarm in order to get it to stop going off by either doing it yourself or by giving whoever is coming into your house the code. You can also contact the alarm company in order to get it to stop ringing.
Call an alarm repair man to fix it.
The alarm should turn off once you start the car. If the alarm is going off while you are driving, pull over and remove the fuse.
It has something to do with your alarm 'accentuator' - contact Toyota about this since it might be a recalled item.
stop waking up in the night
disconnect the battery
take a sledge hammer to the bonnet
Cause Vw sucks!!!!!!!!!!!!!!!!!!!!!!!!!!
Call the company who makes your alarm, and see if there is a problem that is causing it to go off all the time. They should be able to diagnose the problem, and fix it.
type in your code on the security pad
How to set alarm and time