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 Ethernet bus 6 is used to communicate between A11 Radio and T3 Audio Amplifier. This Ethernet harness consists of a single twisted copper pair of wires (circuits 7214 & 7215) from point to point.