Ford Expedition (2018 year). Manual — part 52

PRINCIPLE OF OPERATION

WARNINGS

Hill descent control cannot control
descent in all surface conditions and
circumstances, such as ice or

extremely steep grades. Hill descent
control is a driver assist system and cannot
substitute for good judgment by the driver.
Failure to do so may result in loss of vehicle
control, crash or serious injury.

Hill descent control does not provide
hill hold at zero miles per hour (0
kilometers per hour). When stopped,

you must apply the parking brake or place
the vehicle in P (Park), or it may roll away.

Hill descent control allows you to set and
maintain vehicle speed while descending
steep grades in various surface conditions.

Hill descent control can maintain vehicle
speeds on downhill grades between 2 mph
(3 km/h) and 12 mph (20 km/h). Above 20
mph (32 km/h), the system remains
armed, but you cannot use the system to
set or maintain the descent speed.

Hill descent control requires a cooling
down interval after a period of sustained
use. The amount of time that the feature
can remain active before cooling varies
with conditions. The system provides a
warning in the message center and a tone
sounds when the system is about to
disengage for cooling. At this time,
manually apply the brakes as needed to
maintain descent speed.

USING HILL DESCENT
CONTROL

Press and release the hill
descent button on the
instrument panel. The button

illuminates and a chime sounds when you
switch this feature on.

To increase descent speed, press the
accelerator pedal until you reach the
desired speed. To decrease descent
speed, press the brake pedal until you
reach the desired speed.

Whether accelerating or decelerating, once
you reach the desired descent speed,
remove your feet from the pedals and hill
descent control maintains the chosen
vehicle speed.

Note:

You may observe noise from the ABS

pump motor during hill descent control
operation. This is a normal characteristic of
the ABS and should be no reason for
concern.

Hill Descent Modes

•

At speeds between 2 mph (3 km/h)
and 20 mph (32 km/h): When you
press this button, the light flashes
indicating this feature is active. Your
vehicle maintains the speed you desire
while in this mode.

•

At speeds between 20 mph (32 km/h)
and 40 mph (64 km/h): When you
press this button, the light is solid and
a message appears in the information
display indicating this feature is active.
Your vehicle does not maintain the
speed you desire and you cannot set
your descent speed.

•

At speeds above 40 mph (64 km/h):
When you press this button, the system
turns this feature off and no light or
message appears in the information
display. You need to switch this feature
back on to use.

Refer to Information Displays for hill
descent control messages. See
Information Messages

(page 119).

(If Equipped)

PRINCIPLE OF OPERATION

WARNINGS

To help avoid personal injury, always
use caution when in reverse (R) and
when using the sensing system.

The system may not detect objects
with surfaces that absorb reflection.
Always drive with due care and

attention. Failure to take care may result
in a crash.

Traffic control systems, inclement
weather, air brakes, external motors
and fans may affect the correct

operation of the sensing system.This may
cause reduced performance or false alerts.

The system may not detect small or
moving objects, particularly those
close to the ground.

Note:

Certain add-on devices installed

around the bumper or fascia may create
false beeps. For example, large trailer
hitches, bike or surfboard racks, license plate
brackets, bumper covers or any other device
that may block the normal detection zone
of the system.

Note:

Keep the sensors, located on the

bumper or fascia, free from snow, ice and
large accumulations of dirt. If the sensors
are covered, the system’s accuracy can be
affected. Do not clean the sensors with
sharp objects.

Note:

If your vehicle sustains damage to

the bumper or fascia, leaving it misaligned
or bent, the sensing zone may be altered
causing inaccurate measurement of
obstacles or false alarms. See your
authorized technician.

Note:

When a trailer is connected to your

vehicle, the rear parking aid may detect the
trailer and therefore provide warnings.
Disable the rear parking aid when a trailer
is connected to prevent these warnings.

Note:

The sensing system cannot be turned

off when a MyKey is present. See Principle
of Operation (page 60).

We recommend that you take some time
to get to know the system and its
limitations by reading this section.

The sensing system warns the driver of
obstacles within a certain range of your
vehicle. The system automatically turns
on each time you switch the ignition on.

When receiving a detection warning, the
radio volume reduces to a predetermined
level. After the warning goes away, the
radio volume returns to the previous level.

E139213

You can turn the system on or
off by pressing the parking aid
button. If your vehicle does not

have a parking aid button, the system can
be switched off through the information
display menu or from the pop-up message
that appears once you shift the
transmission into reverse (R). See General
Information

(page 109).

If a fault is present in the system, a warning
message appears in the information
display and does not allow you to switch
the system on. See Information
Messages

(page 119).

If a sensor is blocked and cannot function,
the system becomes disabled and a
warning message appears in the
information display. The system returns to
a normal state once the blockage is
cleared.

REAR PARKING AID

(If Equipped)

The rear sensors are only active when the
transmission is in reverse (R). As your
vehicle moves closer to the obstacle, the
rate of the audible warning increases.
When the obstacle is less than 12 in
(30 cm) away, the warning sounds
continuously. If the system detects a

stationary or receding object farther than
12 in (30 cm) from the corners of the
bumper, the tone sounds for only three
seconds. Once the system detects an
object approaching, the warning sounds
again.

E130178

Coverage area of up to 6 ft (1.8 m) from
the rear bumper. There may be decreased
coverage area at the outer corners of the
bumper.

The system detects certain objects while
the transmission is in reverse (R) :
•

Your vehicle is moving toward a
stationary object at a speed of 3 mph
(5 km/h) or less.

•

Your vehicle is not moving, but a
moving object is approaching the rear
of your vehicle at a speed of 3 mph
(5 km/h) or less.

•

Your vehicle is moving at a speed of
less than 3 mph (5 km/h) and a moving
object is approaching the rear of your
vehicle at a speed of less than 3 mph
(5 km/h).

The system provides audio warnings only
when your vehicle is moving or when your
vehicle is stationary and the detected
obstacle is less than 12 in (30 cm) away
from the bumper.

Obstacle Distance Indicator

(If

Equipped)

The system provides obstacle distance
indication through the information display.
The distance indicator displays when the
transmission is in reverse (R).

The indicator displays:
•

As the distance to the obstacle
decreases the indicator blocks
illuminate and move towards the
vehicle icon.

•

If there is no obstacle detected, the
distance indicator blocks are grayed
out.

FRONT PARKING AID

(If Equipped)

The front sensors are active when the
transmission is in any position other than
park (P) and your vehicle is traveling at low
speed.

E187330

Coverage area of up to 28 in (70 cm) from
the front bumper. The coverage area
decreases at the outer corners.

When your vehicle approaches an object,
a warning tone sounds. When your vehicle
moves closer to an object, the warning
tone repeat rate increases. The warning
tone sounds continuously when an object
is 12 in (30 cm) or less from the front
bumper.

You can switch the system off through the
information display menu or from the
pop-up message that appears once you
shift the transmission into reverse (R). See
General Information

(page 109). If your

vehicle has a parking aid button, you can
switch the system off by pressing the
button.

Obstacle Distance Indicator

(If

Equipped)

The system provides obstacle distance
indication through the information display.

The indicator displays:
•

As the distance to the obstacle
decreases the indicator blocks
illuminate and move towards the
vehicle icon.

•

If there is no obstacle detected, the
distance indicator blocks are grayed
out.

If the transmission is in reverse (R), the
front sensing system provides audio
warnings when your vehicle is moving and
the detected obstacle is moving towards
your vehicle. Once the vehicle is stationary,
the audio warning will be stopped after 2
seconds. Visual indication is always
present in reverse (R).

If the transmission is in drive (D) or any
other forward gear (for example, low (L),
sport (S) or any forward gear in a manual
transmission), the front sensing system
provides audio and visual warnings when
your vehicle is moving below a speed of
5 mph (8 km/h) and an obstacle is located
inside the detection area. Once the vehicle
is stationary, the audio warning will be
stopped after 2 seconds and the visual
indication stops after 4 seconds. If the
obstacles detected are within 12 in
(30 cm), the visual indication remains on.

If the transmission is in neutral (N), the
system provides visual indication only
when your vehicle is moving at 5 mph
(8 km/h) or below and an obstacle is
located inside the detection area. Once
your vehicle is stationary, the visual
indication will stop after 4 seconds.

SIDE SENSING SYSTEM

(If

Equipped)

The side sensing system uses the front and
rear side sensors to detect and map
obstacles within the vehicle's driving path,
located near the sides of your vehicle. The
side sensors are active when the
transmission is in any position other than
park (P).

Note:

Obstacles that enter the side

detection area without being detected and
mapped by the front or rear side sensors will
not be detected.

E187810

Coverage area is up to 24 in (60 cm) from
the sides of your vehicle.

When the system detects an object close
to the side of your vehicle, an audible
warning sounds. As your vehicle moves
closer to obstacles within the driving path
of your vehicle, the rate of the audible
warning increases.