2015 FORD EXPEDITION traction control

Tow/haul delays upshifts to reduce frequency of transmission shifting.
Tow/haul also provides engine braking in all forward gears when the
transmission is in the D (Drive) position; this engine braking will slow
the vehicle and assist the driver in controlling the vehicle when
descending a grade. Depending on driving conditions and load
conditions, the transmission may downshift, slow the vehicle and control
the vehicle speed when descending a hill, without the accelerator pedal
being pressed. The amount of downshift braking provided will vary based
upon the amount the brake pedal is pressed.
To deactivate the tow/haul feature and return to normal driving mode,
press the button on the end of the gearshift lever. The TOW HAUL light
will no longer be illuminated. Tow/haul will also deactivate when the
vehicle is powered down.
3 (Third)
Transmission operates in third gear only.
Used for improved traction on slippery roads.
2 (Second)
Transmission operates in 2nd gear only.
Use 2 (Second) to start-up on slippery roads.
1 (First)
•Transmission operates in 1st gear only.
•Provides maximum engine braking.
•Allows upshifts by moving gearshift lever.
•Will not downshift into 1 (First) at high speeds; allows for 1 (First)
when vehicle reaches slower speeds.
Forced downshifts
•Allowed in D (Drive) only.
•Press the accelerator to the floor.
•Allows transmission to select an appropriate gear.
196Transmission
2015 Expedition(exd)
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4WD switch positions
WARNING:Utility and four-wheel drive vehicles arenot
designed for cornering at speeds as high as passenger cars any
more than low-slung sports cars are designed to perform satisfactorily
under off-road conditions. Avoid sharp turns or abrupt maneuvers in
these vehicles.
Note:If your vehicle is equipped with AdvanceTrac® with RSC®, the
system will automatically turn off the stability enhancement feature
when you shift the 4WD system into 4L (4X4 LOW). You can manually
turn the system off by pressing the AdvanceTrac button, see the
Traction Controlchapter for more information. This will disable the
engine management feature, allowing the vehicle to maintain full power
and enhanced momentum through the obstacle. The brake traction
enhancement feature will still be enabled.
Note:The Control Trac® selector knob should not be changed while the
rear wheels are slipping.
The Control Trac® 4WD system functions in
four modes:
•2H (4X2)delivers power to the rear wheels
only. The message center will momentarily
display 4x2 when this mode is selected. This
mode is appropriate for normal on-road
driving on dry pavement and provides best
fuel economy.
•4A (4X4 AUTO)provides electronic control
four-wheel drive with power delivered to all
four wheels, as required, for increased traction. The message center
will display “4X4 AUTO” when this mode is selected. This mode is
appropriate for all on-road driving conditions, such as dry road
surfaces, wet pavement, snow or gravel.
•4H (4X4)provides electronically locked four-wheel drive power to
front and rear wheels. The message center will display 4X4 when this
mode is selected. This mode is not recommended for use on dry
pavement. This mode is only intended for severe winter or off-road
conditions, such as deep snow, ice or shallow sand.
204Four-Wheel Drive (If Equipped)
2015 Expedition(exd)
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Power is supplied to all four wheels through a transfer case. On 4WD
vehicles, the transfer case allows you to select 4WD when necessary.
Information on transfer case operation and shifting procedures can be
found in this chapter. Information on transfer case maintenance can be
found in theMaintenancechapter. You should become thoroughly
familiar with this information before you operate your vehicle.
4WD (when you select a 4WD mode) uses all four wheels to power the
vehicle. This increases traction, enabling you to drive over terrain and
road conditions that a conventional two-wheel drive vehicle cannot.
Basic Operating Principles In Special Conditions
•Do not use 4H or 4L on dry, hard surfaced roads. Doing so will
produce excessive noise, increase tire wear and may damage drive
components. 4H or 4L modes are only intended for consistently
slippery or loose surfaces.
•Drive slower in strong crosswinds which can affect the normal steering
characteristics of your vehicle.
•Be extremely careful when driving on pavement made slippery by
loose sand, water, gravel, snow or ice.
If your vehicle goes off the edge of the pavement
•If your vehicle goes off the edge of the pavement, slow down, but
avoid severe brake application, ease the vehicle back onto the
pavement only after reducing your speed. Do not turn the steering
wheel too sharply while returning to the road surface.
•It may be safer to stay on the apron or shoulder of the road and slow
down gradually before returning to the pavement. You may lose
control if you do not slow down or if you turn the steering wheel too
sharply or abruptly.
•It often may be less risky to strike small objects, such as highway
reflectors, with minor damage to your vehicle rather than attempt a
sudden return to the pavement which could cause the vehicle to slide
sideways out of control or roll over. Remember, your safety and the
safety of others should be your primary concern.
Four-Wheel Drive (If Equipped)207
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Mud and water
Note:Driving through deep water may damage the vehicle.
If you must drive through high water, drive slowly. Traction or brake
capability may be limited.
When driving through water, determine the depth; avoid water higher
than the bottom of the hubs (if possible) and proceed slowly. If the
ignition system gets wet, the vehicle may stall.
Once through water, always try the brakes. Wet brakes do not stop the
vehicle as effectively as dry brakes. Drying can be improved by moving
your vehicle slowly while applying light pressure on the brake pedal.
Be cautious of sudden changes in vehicle speed or direction when you
are driving in mud. Even 4WD vehicles can lose traction in slick mud. As
when you are driving over sand, apply the accelerator slowly and avoid
spinning your wheels. If the vehicle does slide, steer in the direction of
the slide until you regain control of the vehicle.
If the transmission, transfer case or front axle are submerged in water,
their fluids should be checked and changed, if necessary.
If the front or rear axle is submerged in water, the axle lubricant should
be replaced.
After driving through mud, clean off residue stuck to rotating driveshafts
and tires. Excess mud stuck on tires and rotating driveshafts causes an
imbalance that could damage drive components.
“Tread Lightly” is an educational
program designed to increase public
awareness of land-use regulations and
responsibilities in our nations
wilderness areas. Ford Motor
Company joins the U.S. Forest Service
and the Bureau of Land Management in encouraging you to help preserve
our national forest and other public and private lands by “treading lightly.”
Driving on hilly or sloping terrain
Note:Avoid driving crosswise or turning on steep slopes or hills.
Although natural obstacles may make it necessary to travel diagonally up
or down a hill or steep incline, you should always try to drive straight up
or straight down. . A danger lies in losing traction, slipping sideways and
possibly rolling over. Whenever driving on a hill, determine beforehand
the route you will use. Do not drive over the crest of a hill without
seeing what conditions are on the other side. Do not drive in reverse
over a hill without the aid of an observer.
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When climbing a steep slope or hill, start in a lower gear rather than
downshifting to a lower gear from a higher gear once the ascent has
started. This reduces strain on the engine and the possibility of stalling.
If you do stall out, do not try to turn around because you might roll over.
It is better to back down to a safe location.
Apply just enough power to the wheels to climb the hill. Too much
power will cause the tires to slip, spin or lose traction, resulting in loss of
vehicle control.
Descend a hill in the same gear you
would use to climb up the hill to
avoid excessive brake application
and brake overheating. Do not
descend in neutral; instead,
disengage overdrive or manually
shift to a lower gear. When
descending a steep hill, avoid
sudden hard braking as you could
lose control. When you brake hard,
the front wheels can’t turn and if
they aren’t turning, you won’t be able to steer. The front wheels have to
be turning in order to steer the vehicle.
If your vehicle has anti-lock brakes, apply the brakes steadily. Do not
pump the brakes.
Driving on snow and ice
WARNING:If you are driving in slippery conditions that require
tire chains or cables, then it is critical that you drive cautiously.
Keep speeds down, allow for longer stopping distances and avoid
aggressive steering to reduce the chances of a loss of vehicle control
which can lead to serious injury or death. If the rear end of the vehicle
slides while cornering, steer in the direction of the slide until you
regain control of the vehicle.
4WD vehicles have advantages over 2WD vehicles in snow and ice but
can skid like any other vehicle.
Should you start to slide while driving on snowy or icy roads, turn the
steering wheel in the direction of the slide until you regain control.
210Four-Wheel Drive (If Equipped)
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USA(fus)

PRINCIPLES OF OPERATION
The traction control system helps avoid drive wheel spin and loss of
traction.
If your vehicle begins to slide, the system applies the brakes to individual
wheels and, when needed, reduces engine power at the same time. If the
wheels spin when accelerating on slippery or loose surfaces, the system
reduces engine power in order to increase traction.
USING TRACTION CONTROL
In certain situations (for example, stuck in snow or mud), turning the
traction control off may be beneficial as this allows the wheels to spin
with full engine power.
Turn the traction control system off by pressing the
stability control button located on the center of the
instrument panel.
System indicator lights and messages
WARNING:If a failure has been detected within the traction
control system, the stability control light will illuminate steadily.
Verify that the traction control system was not manually disabled using
the stability control button. If the stability control light still illuminates
steadily, have the system serviced by an authorized dealer immediately.
Operating your vehicle with traction control disabled could lead to an
increased risk of loss of vehicle control, vehicle rollover, personal injury
and death.
The stability control light temporarily illuminates on engine
start-up and flashes when a driving condition activates the
stability system.
The stability control off light temporarily illuminates on engine
start-up and stays on when the traction control system is
turned off or if a problem occurs in the stability system.
Traction Control215
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PRINCIPLES OF OPERATION
WARNING:Vehicle modifications involving braking system,
aftermarket roof racks, suspension, steering system, tire
construction or wheel and tire size may change the handling
characteristics of the vehicle and may adversely affect the performance
of the AdvanceTrac® system. In addition, installing any stereo
loudspeakers may interfere with and adversely affect the AdvanceTrac®
system. Install any aftermarket stereo loudspeaker as far as possible
from the front center console, the tunnel, and the front seats in order
to minimize the risk of interfering with the AdvanceTrac® sensors.
Reducing the effectiveness of the AdvanceTrac® system could lead to
an increased risk of loss of vehicle control, vehicle rollover, personal
injury and death.
WARNING:Remember that even advanced technology cannot
defy the laws of physics. It’s always possible to lose control of a
vehicle due to inappropriate driver input for the conditions. Aggressive
driving on any road condition can cause you to lose control of your
vehicle increasing the risk of personal injury or property damage.
Activation of the AdvanceTrac® system is an indication that at least
some of the tires have exceeded their ability to grip the road; this could
reduce the operator’s ability to control the vehicle potentially resulting
in a loss of vehicle control, vehicle rollover, personal injury and death. If
your AdvanceTrac® system activates, SLOW DOWN.
The AdvanceTrac® with Roll Stability Control™ system helps you keep
control of your vehicle when on a slippery surface. The electronic
stability control portion of the system helps avoid skids and lateral slides
and roll stability control helps avoid a vehicle rollover. The traction
control system helps avoid drive wheel spin and loss of traction. See the
Traction Controlchapter for details on traction control system
operation.
216Stability Control
2015 Expedition(exd)
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AVehicle without AdvanceTrac with
RSC skidding off its intended route.
BVehicle with AdvanceTrac with
RSC maintaining control on a
slippery surface.
USING STABILITY CONTROL
AdvanceTrac®With RSC™
The system automatically activates when you start your engine. You can
turn off the electronic stability control and roll stability control portions
of the system below 35 mph (56 km/h). When the transmission is in
reverse (R), they are disabled. You can turn off the traction control
portion of the system independently. See theTraction Controlchapter.
AdvanceTrac with RSC Features
Button
functionsStability
control
OFF lightRoll
stability
controlElectronic
stability
controlTraction
control
system
Default at
start-upIlluminated
during bulb
checkEnabled Enabled Enabled
Button pressed
momentarilyIlluminated
solidEnabled Enabled
1Disabled1
Stability Control217
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