Is there a hidden maintenance screen?

My quick consultation with the owner's manual actually implies that the screen is only available if you have the navigation system...

Attached is from my pdf of the owner's manual. My recollection from my Prius is that the above screen is accessed from the "Mainta-nence" button

 

If you have the nav system installed, that screen should be under Info-> Maintenance. It is just a place to store notes and dates when these items were done.

 

I have never used this..

useless if you ask me.

 

but to answer your question there are a few hidden screens.

1) turn on your car by pressing power button one time with your feet off the break
2) hold display (or info button if you don't have NAV) button and turn on lights on and off 3x
3) while in the menu screen press top left and bottom left .
4) you get a few more hidden display.

also from the

1) volume menu for your Nav press top left, bottom left & repeat one more time you get more hidden displays. mostly for Nav system

there is website with this and screenshots. but can't add links yet. do a search for vassfamily and Prius website has a bunch prius stuff.

hope that helps

 

able to add links now.. here is the link

Undocumented Custom Menus on the 2004 Toyota Prius