Ford 2004 Expedition Owner's Manual page 209

• 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.
The AdvanceTrac button allows
the driver to control the availability
of the AdvanceTrac
AdvanceTrac system status is
indicated by a warning indicator
light with a "sliding car" icon in the instrument cluster that will flash
when the system is activated and an indicator light in the control button
that will illuminate when the system is turned off. In vehicles with a
message center, the message "ADVANCETRAC OFF" will be displayed.
If a failure is detected in the AdvanceTrac
indicator light in the instrument cluster will stay on. If the warning
indicator light in the instrument cluster remains on while the engine is
running, have the system serviced immediately.
Pressing the button once will disable the AdvanceTrac
enhancement and the engine power reduction portion of the traction
enhancement feature; the brake portion of the traction enhancement
feature will still function normally. Pressing and holding the button for
more than five seconds will disable the AdvanceTrac
enhancement and traction enhancement feature. If the vehicle is stuck
in snow or mud or when driving in deep sand, switching off the
AdvanceTrac system may be beneficial so the wheels are allowed to
spin. If your vehicle seems to lose engine power while driving in deep
sand or very deep snow, switching off the AdvanceTrac
enhancement feature will restore full engine power and will enhance
momentum through the obstacle.
Some drivers may notice a slight movement of the brake pedal when the
AdvanceTrac performs a system self-check. During AdvanceTrac
operation you may experience the following:
• A rumble or grinding noise
2004 Expedition (exd)
Owners Guide (post-2002-fmt)
USA English (fus)
system.
Driving
system, the warning
stability
stability
stability
209