The CCD bus is the communication system between all the modules on the vehicle.(Powertrain control module, transmission control module, air bag module, body control module, etc.) When either the connection between the modules or a module itself has an open or short the ENTIRE communication system goes down(No BUS on the odometer will indicate this) The PCM checks on the other modules and the system integrity all the time. The easiest way to find out whether or not you have a module not responding or a link between it is to one by one un-plug a module. With a module un-hooked, clear the codes and see if the CCD bus is back up. If it is, you found your problem. If not, plug it back in and try another. CCD bus problems are found by this method.
The pcm and cluster can not be tested in this way as they provide ground. I have run into an issue with a PCM that went down when temperature affected it. This can be confirmed by removing the pcm, putting it in the freezer and then re-installing to confirm. I have heard of cluster circuit boards with bad solder points. But since this problem is new and happening after the work you did, first recheck anything that was unplugged and possibly damaged or corroded.
Friday, August 17th, 2018 AT 1:40 PM