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.

 

Sorry, should have mentioned no error codes except P3107, airbag comm fault. Airbag light is on, and vehicle has previous collision damage, so I airbag probably wasn’t replaced after wreck. Car runs and drives perfectly, gets low 40’s gas mileage.