Circuit/System Description
WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
The devices connected to the gateway isolated high speed GMLAN serial data circuits (circuit numbers 1304 & 1305) monitor for serial data communications during normal vehicle operation. The K56 Serial Data Gateway Module acts as the gateway module between devices on primary high speed GMLAN bus and devices on gateway isolated high speed GMLAN bus. The gateway isolated high speed GMLAN serial data bus uses terminating resistors that are in parallel with the gateway isolated high speed GMLAN (+) and (-) circuits.