Exactly what happens when you try the engine?
Dave has nicely covered the process. I’ll emphasize to Make sure the TMCC address number is the same as the TMCC engine ID number. If it’s still the default “1,” that’s the TMCC address for adding it to DCS. If you have changed the TMCC ID number then the “TMCC address” in the DCS remote should be that number. Say you changed the TMCC ID to “5”. AssignTMCC Address 5 when adding it to the DCS remote. (By the way I think Legacy engines still default to a factory assigned ID of 1 for TMCC operation).
Unless something is different about Legacy engines, you don’t need a programming track to add a TMCC equipped engine to DCS. In fact the engine doesn’t even need to be powered up. TMCC engines don’t actually participate in the process of adding to the DCS remote. All you are doing when adding a TMCC engine is configuring the remote to send commands to the assigned TMCC ID number. As Dave says, you can add them while watching TV. In another state....
I have a dim memory of some EOB engines not responding to the DCS remote in 132 speed step mode unless that mode was specifically selected with the DCS throttle if it’s not responding to speed commands check that too.
RM