Ok, so it's a network that connects each computer in the vehicle, right? I can't really get the codes yet since I only had enough charge on the battery to get a few cranks. I have the manuals on order, but I plan to check all connections under the hood (it seems to have sprayed coolant or rusty water everywhere at some point) and I plan to fix the replacement battery terminal clamps (the ones that have a clamp for the wires....). I've got a middle-of-the-road scan tool (autoxray). Will that tell me about the bus?