The trunk is unlocked if the button is pressed for more than 1 second. Also,
once the trunk is opened and then closed, the trunk will be locked automatically.
Driver's door is unlocked if the unlock button is pressed once. The hazard warning
lights will blink twice to indicate that the driver's door is unlocked. All doors
are unlocked if the unl ...
The horn sounds and hazard warning lights flash for about 30 seconds if this
button is pressed for more than 1.5 second. To stop the horn and lights, press any
button except the trunk button on th ...
Hyundai Elantra MD/UD: Trunk unlock (3)
