My wife has a 2012 Rav4. They were unable to reset the Maint. Req. light at the last oil change. I am very familiar with this and have been doing it on my Prius for 8 years. It will not reset. When I follow the proper procedure (while on trip A, hold the button in and press the power button), 5 dashes appear for an instant and then disappear and the trip A mileage reappears. For giggle and kicks, I have done it on the odometer setting and trip A. I only get the 5 dashes for an instant on trip A which leads me to believe that is the correct setting. Any ideas?