Ford Expedition Owner's Manual page 250

Driving
AdvanceTrac with RSC Features
Stability
control
Button
functions
light
Illuminated
Default at
during bulb
start-up
check
Button
Illuminated
pressed
solid
momentarily
Button
pressed
illuminated
again
Trailer sway control
Your vehicle may be equipped with trailer sway control. When properly
equipped, trailer sway control will use the vehicle's AdvanceTrac with
RSC system to detect and help reduce trailer sway by applying brake
force at individual wheels and, if necessary, by reducing engine power.
WARNING: Trailer sway control does not prevent a trailer from
swaying, it mitigates the sway from increasing once it has
occurred. If you are experiencing trailer sway it is likely that the trailer
is improperly loaded for the correct tongue weight or the speed of the
vehicle and trailer is too high. Pull the vehicle-trailer over to a safe
location to check the trailer weight distribution and tongue load and
reduce speed to a safe level while towing. If trailer sway is
experienced, SLOW DOWN.
During trailer sway control events, the stability control light in the
instrument cluster will flash momentarily. The cluster message center
will also display TRAILER SWAY REDUCE SPEED. In some cases when
trailer sway is detected, the vehicle speed is too high and may be above
a speed at which trailer sway will not grow continuously. This may cause
the system to activate multiple times, causing a gradual reduction in
speed.
Note: The trailer sway control will only activate at speeds greater than
40 mph (64 km/h).
250
2012 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)
RSC ESC
off
Enabled Enabled
Enabled Enabled
Not
Enabled Enabled
Engine Brake
traction traction
control control
Enabled Enabled
Partially Partially
enabled enabled
Enabled Enabled