How does the alarm get triggered?
In your Toyota, the alarm sounds when someone attempts to forcibly unlock or open any of the doors, including the hood and trunk. The body control module receives inputs from a number of sensors to determine whether or not the doors are closed and locked. This includes door unlock detector switches, door ajar switches and a glass breakage sensor. If the system is armed, and the control module determines there is a problem, it will flash the vehicle lights and sound the horn to deter theft.
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