RES/ACC Switch
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
If cruise control operation is canceled by any of the various methods, but vehicle speed has not dropped below 25 MPH, the previously set speed can be resumed by depressing the RES/ACC switch and then releasing it.
While operating cruise control system, if RES/ACC switch is depressed and held, vehicle will accelerate. Speed can be increased gradually or in one MPH increments.