From the website contact us page:-
As mentioned in the news feed, the diagrams are no longer available on this site. Toyota Motor Sales Inc. demanded that we remove them, citing copyright claims.
We think this change will not have a significant negative impact on Toyota DIY-ers, it just makes parts lookup more difficult as the diagrams are still easy to obtain (you want a Toyota CD set called Toyota EPC). Note however that we do not distribute this application.If your question is still unanswered, select "Contact us", option "Other".