PURPOSE: A door control device using a vehicle network is provided to simplify the constitution by removing such parts as a door controller or a door solenoid relay and by controlling a swing door through the vehicle network in an express bus. CONSTITUTION: A door control device using a vehicle network(100) includes a door key switch(10), a door switch(20), a step roof switch(30), a swing door solenoid valve(40), a door buzzer(50), a step roof lamp(60), a front lamp right module(70), a room lamp module(80), and an in-panel switch module(90). The front lamp right module produces a buzzer sound by operating the door buzzer and opens a swing door by operating the swing door solenoid valve if the door key switch is turned on or the door switch is turned on. The room lamp module lights the step roof lamp if the door switch is turned on or the step roof switch is turned on. The in-panel switch module outputs the operating state of the door switch and the step roof switch to the front lamp right module and the room lamp module. The front lamp right module, the room lamp module, and the in-panel switch module transmit and receive information through a network line.
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