kbachler1

Hello everyone, I have a 2013 C-MAX Energi, and have started tracking down this issue in just the past week. Ford dealerships and Ford Parts and EV services don't seem to be particularly informed. I'm sure I've repeated a great deal of work outlined in this forum and perhaps others. It would be nice if someone could put together a comprehensive update of steps to go through to update a CMAX 3G TCU today. If such a post exists I'd appreciate a direction to it. In tracking things down, I learned about SSM 50914 that states that TCU HJ5Z-19K350-UM can be used to do the 4G upgrade. However, this part appears to be obsolete and not found anywhere. I note the post above, referring to UP, which I assume is the later TCU HJ5Z-19K350-UP. Part of the issue, of course, is that by using a TCU "off label" as it were, having Ford program it appears problematic. It appears that others have solved this issue. Besides confirmation of the above, I'd love to find out if any 5G TCU has been used for an upgrade. Among other things, (Samsung) Harman now has a "generic" TCU that can, supposedly, be programmed to a broad range of vehicles. See https://car.harman.com/solutions/connectivity/tcu-platform I also see that there has been a lot of work done on TCUs for the F150. I am currently working with a company to do several upgrades to my CMAX, but we are trying to find out where we can find a TCU that works, and how to program it. If anyone can summarize this, it would be most appreciated.