2007 Lexus IS 250 Owners Manual - Page 151

2-4. Using other driving systems n Automatically cancelling constant speed control The set speed is automatically canceled in the following situations. l Actual vehicle speed is more than 10 mph (16 km/h) below the preset vehicle speed At this time, the memorized set speed is not retained. l Vehicle speed falls below 25 mph (40 km/h) l 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 Vehicle-to-vehicle distance Approximately 164 ft. (50 m) Approximately 132 ft. (40 m) Approximately 100 ft. (30 m) 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 or plastic objects, cannot be detected by the obstruction sensor.) Dynamic radar cruise control is canceled if an obstruction is detected. Grille cover Radar sensor 138