2011 Toyota Prius Owners Manual - Page 255

2-4. Using other driving systems n Automatic cancelation of constant speed control The cruise control will stop maintaining the vehicle speed in the following situations: l Actual vehicle speed is more than approximately 10 mph (16 km/h) below the set vehicle speed. At this time, the memorized set speed is not retained. l Vehicle speed falls below approximately 25 mph (40 km/h). l Enhanced VSC is activated. n Vehicle-to-vehicle distance settings Select a distance from the table below. Note that the distances shown correspond to a vehicle speed of 50 mph (80 km/h). Vehicle-to-vehicle distance increases/decreases in accordance with vehicle speed. Distance options Long Medium Short n Radar sensor and grille cover Always keep the sensor and grille cover clean to ensure that the vehicle-to-vehicle distance control operates properly. (Some obstructions, such as snow, ice and plastic objects, cannot be detected by the obstruction sensor.) Dynamic radar cruise control is canceled if an obstruction is detected. Vehicle-to-vehicle distance Approximately 160 ft. (50 m) Approximately 130 ft. (40 m) Approximately 100 ft. (30 m) 2 When driving ITO24P130 n Warning lights, messages and buzzers for dynamic radar cruise control Warning lights, messages and buzzers are used to indicate a system malfunction or to inform the driver of the need for caution while driving. (→P. 517) 229 PRIUS_U (OM47685U) DVD