first off I strongly reccomend reading the instructions, cause this is covered in them..
if I remember correctly: its the same procedures as the tuneedit.
you hook it up to your bike, turn on the key ( not start it)
and open the tuneboy program ( not the tuneedit).. then once its opened and conencted etc. you can retireve error codes, and also clear them...
its pretty cool.. it will even tell you what your bike is thinking, like what temperature things are, if your kickstand is up or down etc etc...
cant remember all of it, but any sensor readings will or can be displayed.
Id love to have it hooked up wile ridign and display all of that stuff on a screen, but Id probably wreck