Resuming The Preset Speed
WARNING: This page is about a different car, the 2003 Lexus ES 300 and 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
If the preset speed is cancelled by pulling the control lever or by depressing the brake pedal, pushing he lever up in the RES/ACC direction will restore the speed set prior to cancellation. However, once the vehicle speed falls below about 25 mph (40 km/h), the preset speed will not be resumed.