2005 Ford Expedition Owner's Manual - Page 267

Driving down, the system will again function normally. Anti-lock braking is not affected by this condition and will function normally during the cool-down period. The AdvanceTrac with RSC system enhances your vehicle's stability during maneuvers that require all available tire traction, like in wet/snowy/icy road conditions and/or when performing emergency maneuvers. In an emergency lane-change, the driver will experience better overall vehicle traction, and have better control of the vehicle. The AdvanceTrac with RSC system helps the driver maintain steering control if the vehicle begins to slide excessively left or right or spin out. AdvanceTrac with RSC will attempt to correct the sliding motion by applying brake force at individual tires and, if necessary, by reducing engine power. Driving conditions, which may activate the AdvanceTrac with RSC system, include: • Taking a turn too fast • Maneuvering quickly to avoid an accident, pedestrian or obstacle • Hitting a patch of ice • 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 • Hitting a curb while turning • Driving on slick surfaces • Cornering while towing a heavily loaded trailer (refer to Trailer Towing in this chapter) The RSC feature works to further enhance the vehicle's overall stability during aggressive maneuvers. The RSC feature helps maintain roll stability of the vehicle during aggressive maneuvers by applying brake force to one or more wheels. The AdvanceTrac with RSC system automatically turns on when the engine is started. However, the system does not function when the vehicle is traveling in R (Reverse) or, if equipped with four-wheel drive, in 4L (4X4 LOW). In R (Reverse) or in 4L (4X4 LOW), ABS and the traction enhancement feature will continue to function. 267 2005 Expedition (exd) Owners Guide (post-2002-fmt) USA (fus)