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 Ethernet bus 4 is used to communicate Audio Video Bridge (AVB) data between K73 Telematic Control Module and A11 Radio. This Ethernet harness consists of a single twisted copper pair of wires (circuits 7210 & 7211) from point to point.