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The methods shown in this video can be used when diagnosing network problems, although keep in mind not all networks are the same.
In this video we are working on a 2007 Audi A6, the engine is a 4.2l. There is some history with this vehicle. It was towed to a shop with an ECM "no comm" and would not start. They replaced the ECM and towed it to the dealer to have it programmed. The vehicle now starts and runs but has other faults stored that the shop wants addressed. The fault that we are addressing is stored in the Gateway module, and is 'Combination comfort bus single wire mode'. This video is in hindsight and I tried to get as close as possible as I could retracing my steps. There were some variables that changed this video and I wish I could have done it live, but in my opinion it still turned out good. I hope you guys enjoy this video and thanks for watching.