Component Description: RCM
WARNING: This page is about a different car, the 2022 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
The shift by wire system uses the driver's safety belt buckle as one of several inputs used to determine driver presence. If the buckle is deemed faulted for any reason the system reads this as "unbuckled" so that any time the door transitions to "open" below a set speed the PCM commands a to return to park.