Circuit/System Description
WARNING: This page is about a different car, the 2020 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The B233LF Short Range Radar Sensor - Left Front, B233RF Short Range Radar Sensor - Right Front, and B233R Short Range Radar Sensor - Rear each performs a routine of self-check functions to determine if it is a normal operating state.