Hyundai Elantra HD: Remote keyless entry system operations
Lock (1)
All doors are locked if the lock button is pressed.
If all doors are closed, the hazard warning lights blink once to indicate that all doors are locked. However, if any door remains open, the hazard warning lights don’t blink. After this, if all doors are closed, the hazard warning lights blink.
Unlock (2)
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 unlock button is pressed twice within 4 seconds. The hazard warning lights will blink twice again to indicate that all doors are unlocked.
After depressing this button, the doors will be locked automatically unless you open any door within 30 seconds.
Trunk lid open (3)
The trunk lid opens if this button is pressed more than 0.5 second.
Alarm (4)
The horn sounds and hazard warning lights flash for about 30 seconds if this button is pressed. To stop the horn and lights, press any button on the transmitter.