2014 Prius V Cruise Control wiring diagram

My dad has a 2014 Prius V with normal (not adaptive) cruise control. The cruise control light doesn't come on when you push the button on the stalk, and therefore the cruise doesn't work at all. A few other things don't work on this car as well, I'm thinking they might all be related. What's the quickest way to troubleshoot this issue? Anyone know where I can get a Prius V wiring diagram?
Other things that don't work:
1. PWR, ECO, EV mode switches on console
2. Energy display doesn't illuminate the engine when it's running or show any lines/arrows displaying power flow to/from motor, engine and battery.
I suspect they might all be related, but I'll probably need a wiring diagram to track it down. I checked all the fuses that sounded like they might be related to this system.
I guess the other possibility might be a mis-programmed computer module controlling this system.
Any help would be greatly appreciated.