2011 Lexus IS 350 User Guide - Page 188
2011 Lexus IS 350 Manual
Page 188 highlights
2-4. Using other driving systems n Accelerating The vehicle can accelerate normally. After acceleration, the set speed resumes. However, during vehicle-to-vehicle distance control mode, the vehicle speed may decrease below the set speed in order to maintain the distance to the vehicle ahead. n Automatically canceling vehicle-to-vehicle distance control Vehicle-to-vehicle distance control driving is automatically canceled in the following situations. l Vehicle speed falls below 24 mph (40 km/h) l VSC is activated. l The sensor cannot operate correctly because it is covered in some way. l The windshield wipers are operating at high speed. l The "ECT SNOW" switch is set to snow mode. 2 When driving If vehicle-to-vehicle distance control driving is automatically canceled for any other reason, there may be a malfunction in the system. Contact your Lexus dealer. 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 24 mph (40 km/h) l VSC is activated. 195