Ford Expedition Owner's Manual page 249

• 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
spin. This will restore full engine power and will enhance momentum
through the obstacle. To switch off the traction control, press the
stability control button. Full features of the AdvanceTrac with RSC
system can be restored by pressing the stability control button again or
by turning off and restarting the engine.
If you switch off the traction control, the stability control off light will
illuminate steadily. Pressing the stability control button again will turn off
the stability control light.
In 4L (4X4 Low) if equipped, ABS and the brake traction control
features will continue to function; however ESC, RSC and engine traction
control are disabled.
In R (Reverse), ABS and the engine traction control and brake traction
control features will continue to function; however, ESC and RSC are
disabled.
2012 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)
Driving
249