URL for a 2017 under the hood diagram...

Tech info.Toyota.com

 

What do you mean be an "under the hood diagram"? Just the basic "these are the things under the hood, here's where the different fluids go in" kind of thing from the owners' manual? Or something more than that?

 

That was the same question I had when I first read the O Post. And many times it doesn't matter what is posted, the suggestions just get blasted for being not what was asked for, than what ya do?

I thought bisco s post was excellent too, given the amount of info about what under the hood was wanted.,,,, everything under the hood? good luck finding that one though....

 

Lots of diagrams in the owners manual. Depends what you are looking for.

Google will find it, probably toyota.com

 

Do you want the 4th gen Prius Toyota Repair Manual?

 

The techinfo.toyota.com link given in #2 was not a bad suggestion, even if the question is just for the kind of diagrams that are in the owners' manual. You can find that manual there too, if there's not one in the glove box, and it's even outside the paywall, unlike the repair manuals and other service info.

As for the service and repair info that's available there, other means of access also exist, some of which might not be paywalled, depending on where you are. They're described on this wiki page:

Toyota Service Information and Where To Find It | PriusChat