2011 Ford Expedition Owner Guide 1st Printing - Page 249

Driving Electronic stability control (ESC) Electronic stability control (ESC) may enhance your vehicle's directional stability during adverse maneuvers, for example when cornering severely or avoiding objects in the roadway. ESC operates by applying brakes to one or more of the wheels individually and, if necessary, reducing engine power if the system detects that the vehicle is about to skid or slide laterally. During ESC events, the stability control light in the instrument cluster will flash. Certain adverse driving maneuvers may activate the ESC system, which include but are not limited to: • Taking a turn too fast • Maneuvering quickly to avoid an accident, pedestrian or obstacle • Driving over a patch of ice or other slippery surfaces • Changing lanes on a snow-rutted road • Entering a snow-free road from a snow-covered side street, or vice versa • Entering a paved road from a gravel road, or vice versa • Cornering while towing a heavily loaded trailer (refer to Trailer towing in the Tires, Wheels and Loading chapter). Roll Stability Control™ (RSC௡) Roll Stability Control™ (RSC௡) may help to maintain roll stability of the vehicle during adverse maneuvers. RSC௡ operates by detecting the vehicle's roll motion and the rate at which it changes and by applying the brakes to one or more wheels individually. During an event that activates the RSC௡ system, the stability control light in the instrument cluster will flash. Certain adverse driving maneuvers may activate the Roll Stability Control system, which include: • Emergency lane-change • Taking a turn too fast • Quick maneuvering to avoid an accident, pedestrian or obstacle Switching off traction control If the vehicle is stuck in snow, mud or sand, and seems to lose engine power, switching off the traction control features of the AdvanceTrac௡ with RSC௡ system may be beneficial because the wheels are allowed to 249 2011 Expedition (exd) Owners Guide, 1st Printing USA (fus)