Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The side blind zone alert system utilized two control modules, the B218L Side Obstacle Detection Control Module - Left and the B218R Side Obstacle Detection Control Module - Right. Each B218 Side Obstacle Detection Control Module contains a radar. The B218L Side Obstacle Detection Control Module - Left and the B218R Side Obstacle Detection Control Module - Right communicate with one another on a private side obstacle detection CAN bus and with the rest of the vehicle on the CAN 4 bus.