Hyundai Sonata: Theft-alarm stage

Hyundai Sonata YF 2011-2014 Owner's Manual / Features of your vehicle / Theft-alarm system / Theft-alarm stage

The alarm will be activated if any of the following occurs while the system is armed.

A door is opened without using the transmitter (or smart key or mechanical key).
The trunk is opened without using the transmitter (or smart key).
The engine hood is opened.

The horn will sound and the hazard warning lights will blink continuously for approximately 30 seconds, and the alarm will repeat once more unless the system is disarmed. To turn off the system, unlock the doors with the mechanical key or transmitter or smart key.

Armed stage

Using the smart key Park the vehicle and stop the engine. Arm the system as described below. 1.Turn off the engine. 2.Make sure that all doors, the engine hood and trunk lid are closed and latched. ...

Opening the trunk with the alarm armed (if equipped)

When the alarm is armed, the alarm will not sound if the trunk lid is opened with the transmitter (or smart key). Once the trunk is opened and then closed, the trunk will be locked automatically ...