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 4 is used to communicate between K73 Telematic Control Module and A11 Radio or K56 Serial Data Gateway Module depending on the Radio type or vehicle configuration.

K56 Serial Data Gateway Module and K73 Communication Interface Module for vehicles equipped with IOR radio.
A11 Radio and K73 Communication Interface Module for vehicles equipped with other radios such as IOK, IOS, IOT, IOU, IOV.

This Ethernet harness consists of a single twisted copper pair of wires (circuits 7210 & 7211) from point to point.