METHOD FOR OPERATING AUDIO, VIDEO, AND NAVIGATION (AVN) SYSTEM, AVN SYSTEM, AND VEHICLE INCLUDING THE SAME

An audio, video, and navigation (AVN) system (100) includes a battery voltage detection circuit configured to detect an output voltage of a main battery (20); an e-call power controller (210) configured to output power of a back-up battery (BUB) based on a result of detecting the output voltage; and a central controller (300) configured to receive the power of the BUB and to generate an accident occurrence message when an airbag inflation signal is received.