My 05 prius needs the dealer scan tool to bleed the rear brakes, important in a world where salt corrodes their lines.
Tried it without the scan tool, upon booting the car turned on the red warning triangle and refused to move out of park. It noticed a lack of pressure during power-on self-check.
The front brakes bleed if someone does something with relays under the hood.
By the time your car needs servicing, the scanner will cost less.