The perimeter alarm is a deterrent against unauthorized access to your vehicle through the doors and the hood. If the alarm is triggered, the alarm horn sounds and the hazard flasher flashes.
Take all remote controls to an authorized dealer if there is any potential alarm problem with your vehicle.
Arming the Alarm
The alarm arms when you lock your vehicle.   See   Doors and Locks
Disarming the Alarm
Vehicles Without Keyless Entry
Disarm and silence the alarm by unlocking the doors with the key and switching your vehicle on with a correctly coded key, or by unlocking the doors with the remote control.
Vehicles With Keyless Entry
Disarm and silence the alarm by unlocking the doors and switching your vehicle on, or by unlocking the doors with the remote control.
Note:   A valid passive key must be within the detection range of that door.   See   Keyless Entry