When the interior light switch is in the DOOR position and all doors (and tailgate) are locked and closed, the room lamp will come on for 30 seconds if any of the below is performed.
At this time, if you press the door lock button, the lamps will turn off immediately.
Kia Cee'd JD Service Manual: Yaw-rate and Lateral G Sensor Repair procedures
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Pull the passenger seat towards the front till the end.
3.
Disconnect the yaw rate & lateral G sensor connector ...
Kia Cee'd JD Service Manual: Center Fascia Panel Repair procedures
Replacement
•
When prying with a flat-tip screwdriver, wrap it with protective
tape, and apply protective tape around the related parts, to
prevent damage.
...