If you look in your owners manual there is information for ordering the official Toyota factory repair manuals. It is (I believe) a four part set, one electrical manual, two engine/chassis manuals and a body manual. They are the ones the dealership techs use. There is also a link somewhere on this site for a PDF copy of the factory manuals.
Went back and found the link
http://www.scionxdforum.com/forum/showthread.php?t=769