warning light FORD EXPLORER 2019 Service Manual

USING HILL DESCENT
CONTROL
Principle of operation
WARNING: 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. WARNING:
Hill descent control
does not provide hill hold at zero miles
per hour (0 kilometers per hour). When
stopped, the parking brake must be
applied or the vehicle must be placed in
P
(Park) or it may roll away.
Hill descent control allows the driver 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 3 mph
(5 km/h)
and 20 mph (32 km/h). Above
20 mph (32 km/h), the system remains
armed, but descent speed cannot be set
or maintained.
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 chime
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 located in the
center of the terrain
management control. A light in the control
illuminates and a chime sounds when this
feature activates.
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 below
20 mph (32 km/h):
When you press the Hill Descent
Control and Hill Descent Control
activates, HILL DESCENT CONTROL
ACTIVE
appears in the message
center for several seconds.
• At speeds below
20 mph (32 km/h):
When you press the Hill Descent
Control switch and conditions are not
correct for hill descent activation, the
Hill Descent Control system enables,
the light on the button is solid and HILL
DESCENT CONTROL READY
displays in the message center for
several seconds.
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(If Equipped)

The adaptive cruise controls are on the
steering wheel.
Switching Adaptive Cruise Control
On
Press and release the button.
The indicator, current gap setting
and set speed appear in the
information display.
Setting the Adaptive Cruise Speed
Drive to the speed you prefer.
Press and release either button.
Take your foot off the accelerator pedal. The indicator, current gap setting and set
speed appear in the information display.
A vehicle graphic illuminates if there is a
vehicle detected in front of you.
Note:
When adaptive cruise control is
active, the speedometer may vary slightly
from the set speed displayed in the
information display.
Following a Vehicle WARNING: When following a
vehicle, your vehicle does not decelerate
automatically to a stop, nor does your
vehicle always decelerate quickly
enough to avoid a crash without driver
intervention. Always apply the brakes
when necessary. Failing to do so may
result in a crash, serious injury or death. WARNING: Adaptive cruise control
only warns of vehicles detected by the
radar sensor. In some cases there may
be no warning or a delayed warning. You
should always apply the brakes when
necessary. Failure to do so may result in
a crash, serious injury or death.
Note: When you are following a vehicle and
you switch on a direction indicator, adaptive
cruise control may provide a small
temporary acceleration to help you pass.
Note: The brakes may emit noise when
applied by the system.
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When you press the accelerator pedal, you
override the set speed and gap distance.
Use the accelerator pedal
normally to intentionally exceed
the set speed limit.
When you override the system, the green
indicator light illuminates and the vehicle
image does not appear in the information
display.
The system resumes operation when you
release the accelerator pedal. The vehicle
speed decreases to the set speed, or a
lower speed if following a slower vehicle.
Changing the Set Speed Press and release to increase the
set speed in small increments.
Press and release to decrease
the set speed in small
increments.
Press and hold either button to change the
set speed in large increments. Release the
button when you reach the speed you
prefer.
Press the accelerator or brake pedal until
you reach the speed you prefer. Press
either button.
The system may apply the brakes to slow
the vehicle to the new set speed. The set
speed displays continuously in the
information display when the system is
active.
Canceling the Set Speed Press and release the button or
tap the brake pedal.
The set speed does not erase. Resuming the Set Speed Press and release the button.
Your vehicle speed returns to the
previously set speed and gap setting. The
set speed displays continuously in the
information display when the system is
active.
Note: Only use resume if you are aware of
the set speed and intend to return to it.
Automatic Cancellation
The system is not functional at vehicle
speeds below 12 mph (20 km/h). The
information display indicates low engine
speed, an audible alarm sounds and the
automatic braking releases if the vehicle
drops below this speed.
Automatic cancellation can also occur
when:
• The tires lose traction.
• You apply the parking brake.
Note: If the engine speed drops too low, an
audible warning sounds and a message
appears in the information display.
Automatic braking releases.
Hilly Condition Usage
Note: An audible alarm sounds and the
system shuts down if it applies brakes for
an extended period of time. This allows the
brakes to cool. The system functions
normally again when the brakes have
cooled.
Select a lower gear during prolonged
downhill driving on steep slopes, such as
mountainous areas, when the system is
active. In such situations, the system needs
additional engine braking to reduce the
load on the vehicle ’s regular brake system
to prevent the brakes from overheating.
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Action
Cause
Do not use the system in these conditions
because it may not detect any vehicles
ahead.
Water, snow or ice on the surface of the
road may interfere with the radar signals.
Wait a short time or switch to normal cruise
control.
You are in a desert or remote area with no
other vehicles and no roadside objects.
Due to the nature of radar technology, it is possible to get a blockage warning with no
actual block. A false blocked condition either self clears, or clears after you restart your
vehicle.
Switching to Normal Cruise
Control WARNING: Normal cruise control
will not brake when your vehicle is
approaching slower vehicles. Always be
aware of which mode you have selected
and apply the brakes when necessary. The cruise control indicator light
replaces the adaptive cruise
control indicator light if you
select normal cruise control. The gap
setting does not display, and the system
does not respond to lead vehicles.
Automatic braking remains active to
maintain set speed.
You can change from adaptive cruise
control to normal cruise control through
the information display.
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USING DRIVER ALERT
Switching the System On and Off
Switch the system on or off using the
information display. See General
Information (page 104).
When activated, the system will monitor
your alertness level based upon your
driving behavior in relation to the lane
markings, and other factors.
System Warnings
Note: The system will not issue warnings
below approximately
40 mph (64 km/h).
The warning system has two stages. At
first, the system issues a temporary
warning that you need to take a rest. This
message will only appear for a short time.
If the system detects further reduction in
driving alertness, it may issue another
warning that will remain in the information
display for a longer time. You can press OK
on the steering wheel control to clear the
warning.
Resetting the System
You can reset the system by either:
• Switching the ignition off and on.
• Stopping the vehicle and then opening
and closing the driver ’s door. LANE KEEPING SYSTEM
(IF
EQUIPPED) WARNING:
You are responsible
for controlling your vehicle at all times.
The system is designed to be an aid and
does not relieve you of your responsibility
to drive with due care and attention.
Failure to follow this instruction could
result in the loss of control of your
vehicle, personal injury or death. WARNING:
Always drive with due
care and attention when using and
operating the controls and features on
your vehicle. WARNING:
In cold and severe
weather conditions the system may not
function. Rain, snow and spray can all
limit sensor performance. WARNING:
Large contrasts in
outside lighting can limit sensor
performance. WARNING:
The system will not
operate if the sensor cannot track the
road lane markings. WARNING:
The sensor may
incorrectly track lane markings as other
structures or objects. This can result in
a false or missed warning. WARNING:
The system may not
operate properly if the sensor is blocked.
Keep the windshield free from
obstruction.
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WARNING: If damage occurs in
the immediate area surrounding the
sensor, have your vehicle checked as
soon as possible.
Note: The system works above
40 mph
(64 km/h).
Note: The system works as long as the
camera can detect one lane marking.
Note: When you select aid or alert and aid
mode and the system detects no steering
activity for a short period, the system alerts
you to put your hands on the steering wheel.
The system may detect a light grip or
touch on the steering wheel as hands off
driving.
Note: The system may not function if the
camera is blocked, or if the windshield is
damaged or dirty. When you switch the system on and it
detects an unintentional drift out of your
lane is likely to occur, the system notifies
or assists you to stay in your lane through
the steering system and information
display. In Alert mode, the system provides
a warning by vibrating the steering wheel.
In Aid mode, the system provides steering
assistance by gently counter steering your
vehicle back into the lane. When the system is functioning in the
combined Alert and Aid mode, the system
first provides steering assistance by gently
counter steering your vehicle back into the
lane, followed by a warning that vibrates
the steering wheel if the vehicle is still out
of the lane markings.
Switching the System On and Off
Note:
The system on or off setting is stored
until it is manually changed, unless a MyKey
is detected. If the system detects a MyKey,
it defaults to on and the mode sets to alert. Press the button on the direction indicator
stalk to switch the system on or off.
System Settings
The system has optional setting menus
available. The system stores the last
known selection for each of these settings.
You do not need to readjust your settings
each time you switch the system on.
Mode:
This setting allows you to select
which of the system features you can
enable.
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Why is the feature not available (line markings are gray) when I can see the lane markings
on the road?
Your vehicle stays too close to the lane markings.
Driving at high speeds in curves.
The last alert warning or aid intervention occurred a short time ago.
Ambiguous lane markings, for example in construction zones.
Rapid transition from light to dark, or from dark to light.
Sudden offset in lane markings.
ABS or AdvanceTrac ™ is active.
There is a camera blockage due to dirt, grime, fog, frost or water on the windshield.
You are driving too close to the vehicle in front of you.
Transitioning between no lane markings to lane markings or vice versa.
There is standing water on the road.
Faint lane markings, for example partial yellow lane markings on concrete roads.
Lane width is too narrow or too wide.
The camera has not been calibrated after a windshield replacement.
Driving on tight roads or on uneven roads. Why does the vehicle not come back toward the middle of the lane, as expected, in the
Aid or Aid + Alert mode?
High cross winds are present.
There is a large road crown.
Rough roads, grooves or shoulder drop-offs.
Heavy uneven loading of the vehicle or improper tire inflation pressure.
The tires have been changed, or the suspension has been modified.
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BLIND SPOT INFORMATION
SYSTEM (IF EQUIPPED)
WARNING:
Do not use the blind
spot information system as a
replacement for using the interior and
exterior mirrors or looking over your
shoulder before changing lanes. The
blind spot information system is not a
replacement for careful driving. WARNING:
The system may not
operate properly during severe weather
conditions, for example snow, ice, heavy
rain and spray. Always drive with due
care and attention. Failure to take care
may result in a crash. The system is designed to detect vehicles
that may have entered the blind spot zone.
The detection area is on both sides of your
vehicle, extending rearward from the
exterior mirrors to approximately
13 ft
(4 m) beyond the rear bumper. The
detection area extends to approximately
59 ft (18 m)
beyond the rear bumper when
the vehicle speed is greater than 30 mph
(48 km/h) to alert you of faster
approaching vehicles. Note:
The system does not prevent contact
with other vehicles. It is not designed to
detect parked vehicles, pedestrians, animals
or other infrastructures.
Using the Blind Spot Information
System
Vehicles with Automatic Transmission
The system turns on when all of the
following occur:
• You start your vehicle.
• You shift into drive (D).
• The vehicle speed is greater than
6 mph (10 km/h)
.
Note: The system does not operate in park
(P) or reverse (R).
Vehicles with Manual Transmission
The system turns on when all of the
following occur:
• You start your vehicle.
• The vehicle speed is greater than
6 mph (10 km/h)
.
Note: The system does not operate in
reverse (R).
System Lights and Messages 231
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Extreme continuous steering may increase
the effort required for you to steer your
vehicle. This increased effort prevents
overheating and permanent damage to
the steering system. You do not lose the
ability to steer your vehicle manually.
Typical steering and driving maneuvers
allow the system to cool and return to
normal operation.
Steering Tips
If the steering wanders or pulls, check for:
•
Correct tire pressures.
• Uneven tire wear.
• Loose or worn suspension
components.
• Loose or worn steering components.
• Improper vehicle alignment.
Note: A high crown in the road or high
crosswinds may also make the steering
seem to wander or pull.
Adaptive Learning
The electronic power steering system
adaptive learning helps correct road
irregularities and improves overall handling
and steering feel. It communicates with
the brake system to help operate
advanced stability control and accident
avoidance systems. Additionally, whenever
the battery is disconnected or a new
battery installed, you must drive your
vehicle a short distance before the system
relearns the strategy and reactivates all
systems. PRE-COLLISION ASSIST (IF
EQUIPPED) WARNING:
You are responsible
for controlling your vehicle at all times.
The system is designed to be an aid and
does not relieve you of your responsibility
to drive with due care and attention.
Failure to follow this instruction could
result in the loss of control of your
vehicle, personal injury or death. WARNING:
The system does not
detect vehicles that are driving in a
different direction, pedestrians at night,
cyclists or animals. Failure to take care
may result in the loss of control of your
vehicle, serious personal injury or death. WARNING:
The system does not
operate during hard acceleration or
steering. Failure to take care may lead
to a crash or personal injury. WARNING:
The system may fail
or operate with reduced function during
cold and severe weather conditions.
Snow, ice, rain, spray and fog can
adversely affect the system. Keep the
front camera and radar free of snow and
ice. Failure to take care may result in the
loss of control of your vehicle, serious
personal injury or death. WARNING: In situations where the
vehicle camera has limited detection
capability, this may reduce system
performance. These situations include
but are not limited to direct or low
sunlight, vehicles at night without tail
lights, unconventional vehicle types,
pedestrians with complex backgrounds,
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running pedestrians, partly obscured
pedestrians, or pedestrians that the
system cannot distinguish from a group.
Failure to take care may result in the loss
of control of your vehicle, serious
personal injury or death.
WARNING: The pre-collision assist
system's brake support reduces collision
speed only if you brake your vehicle
before any collision. You must press your
brake pedal as you would in any typical
braking situation. WARNING: The system cannot
help prevent all crashes. Do not rely on
this system to replace driver judgment
and the need to maintain a safe distance
and speed.
Note: The system does not detect, warn or
respond to potential collisions with vehicles
to the rear or sides of your vehicle.
Using the Pre-Collision Assist
System
The system is active at speeds above
approximately
5 mph (8 km/h). The system alerts you of certain collision
risks. The system's sensor detects your
vehicle's rapid approach to other vehicles
traveling in the same direction as your
vehicle. When your vehicle rapidly approaches
another vehicle, a flashing visual warning
appears and an audible warning tone
sounds.
The brake support system assists you in
reducing any collision speed by
pre-charging the brakes. If the risk of
collision continues to increase after the
audio-visual warning, the brake support
prepares the brake system for rapid
braking. Brake support does not
automatically apply the brakes. If you press
the brake pedal, the system could apply
additional braking up to maximum braking
force, even if you lightly press the brake
pedal.
You can adjust the warning system's
sensitivity through your information
display.
See General Information (page
104).
Note: If you perceive Pre-Collision Assist
alerts as being too frequent or disturbing,
then you can reduce the alert sensitivity,
though the manufacturer recommends
using the highest sensitivity setting where
possible. Setting lower sensitivity would
lead to fewer and later system warnings.
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