2002 Lexus LS 430 User Guide 1 - Page 276

5 Resuming the preset speed If the preset speed has been cancelled, when you push the lever up in the "RES/ACC" direction while "RADAR READY" shows up on the multi-information display and at a vehicle speed of about more than 40 km/h (25 mph), the speed set prior to cancellation will be restored. During follow-up cruising, if there are no vehicles running ahead because they have changed lanes, your vehicle will accelerate gradually up to the preset speed. At this time, pushing the control lever upward in the "RES/ACC" direction will quickly speed up your vehicle in vehicle-to-vehicle distance control mode. D Depending on the road configuration (curved roads, left and right continuous curved roads, driving at the start or end of the curve, narrow driving lanes due to road construction) or your vehicle condition (steering wheel maneuvering, position in the lane or unstable driving because of an accident or breakdown), vehicles in other lanes or surrounding objects will be detected, resulting in a control failure or the activated approach warning. This may also result in a very close distance between vehicles due to a failure to detect the vehicle ahead. Maneuvering the steering wheel in response to a violent lateral wind will cause similar conditions. CAUTION D Deceleration cruising function and approach warning do not operate when the vehicle ahead is at a stop or driving very slowly D While vehicle-to-vehicle distance control (follow-up cruising) is on, acceleration and deceleration are automatically performed in proportion to the speed of the vehicle ahead detected. However, if the vehicle ahead of you decelerates abruptly or if another vehicle cuts in ahead of you, your vehicle may collide with the vehicle ahead unless you manually depress the brake pedal to slow down your vehicle. If you need to accelerate because the vehicle ahead or you changes lanes, then depress the acceleration pedal.