Some vehicles are equipped with a deadlock system. Deadlocks prevent opening of a door from either inside or outside the vehicle once the deadlocks have been activated providing an additional measure of vehicle security.
To lock the vehicle using the deadlock function, the doors must be locked by using the transmitter or smart key. To unlock the vehicle, the transmitter or smart key must be used again.
WARNING
Do not lock the doors with the transmitter or the smart key with anybody left in the vehicle.The passenger in the vehicle cannot unlock the doors with the door lock button. For example, if the door is locked with the transmitter, the passenger in the vehicle cannot unlock the door without the transmitter.
Kia Cee'd JD Service Manual: Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the BCM unit (A) after loosening nuts.
...
Kia Cee'd JD Owners Manual: Key operations
Used to start the engine.
Used to lock and unlock the doors.
WARNING
We recommend that you use parts
for replacement from an authorized
Kia dealer. If an aftermarket key is
used, the ignition switch may not
return to ON after START. If this
happens, the starter will continue
to ...