I have one PS/2 engine out of around 40 that when I learn it into the remote, power the track and the remote down, then power both back up and try to access the engine, I get CHECK TRACK. I can then relearn the engine into the remote just fine. Repeat the process and it happens again. This engine has been on the track and in weekly use for several years.
I have replaced the battery, which shows about 2.4 volts on my meter, twice.
I have taken the engine to a dealers track, it seems to work fine.
I have reflashed the handheld and the TIU to the latest version.
I have checked for crimped wire and I have run the engine without the shell.
I have done a factory reset using the remote control.
I am at a loss of what to try.