I looked up the bus diagrams in AD. There are 3 K-CANs on the Gateway. Connector 1Bpin 48&49(y/r& y/bn), pin 50&51(O/G&G). connector 3B pin 7&8(O/G&G). Measuring at the gateway may point to the section that is faulted. Bus Testing info says that the K-CAN line... Login to read more.