Ah... I see.
As you're a supporter, the easiest way to find the diagnosutic data is to download the XT660R Yamaha Service Manual from this thread:
http://www.xt660.com/showthread.php?t=84
It contains everything you'll need.
You will need a password (which you were given when you became a supporter). If you've forgotten it, them PM CaptMoto for a reminder.