FORD 2003 Expedition v.1 - Manual (Page 200)

If the AdvanceTrac
௢ system is activated and deactivated excessively in a
short period of time, the brake portion of the system will shut down to
allow the brakes to cool down. A limited AdvanceTrac
௢ function using
only engine power reduction will still help control the wheels from
over-spinning. When the brakes have cooled 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.
AdvanceTrac
௢ 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
௢ system helps the driver maintain steering control if
the vehicle begins to slide excessively left or right or spin out.
AdvanceTrac
௢ 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 AdvanceTrac
௢ 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 AdvanceTrac
௢ 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.
Driving
200