FORD F-150 2021 Owners Manual

ELECTRONIC LOCKING DIFFERENTIAL – INFORMATION MESSAGES
Description and Action
Message
The electronic locking differential has been requested andwill engage when the speed condition is met.
To Engage Locking
Differential Slow to XX mph/km/h
Release the accelerator pedal in order to engage.
To Engage Locking
Differential Release Accelerator Pedal
An electronic locking differential system fault is present.Contact an authorized dealer as soon as possible.
Check Locking Differen-
tial
307
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Electronic Locking Differential (If Equipped)

BRAKE PRECAUTIONS
WARNING: Driving your vehicle
with the warning lamp on is dangerous.
A significant decrease in braking
performance may occur. It may take you
longer to stop your vehicle. Have your
vehicle checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
Wet brakes result in reduced braking
efficiency. Gently press the brake pedal a
few times when leaving a car wash or
driving from standing water to dry the
brakes.
Note: Depending on applicable laws and
regulations in the country for which your
vehicle was originally built, the stoplamps
could flash during heavy braking. Following
this the hazard warning flashers could also
turn on when your vehicle comes to a stop.
ANTI-LOCK BRAKING SYSTEM
ANTI-LOCK BRAKING SYSTEM
LIMITATIONS
The anti-lock braking system does not
eliminate the risk of crash when:
• You drive too closely to the vehicle in
front of you.
• Your vehicle is hydroplaning.
• You take corners too fast.
• The road surface is poor.
Note: If the system activates, the brake
pedal could pulse and travel further.
Maintain pressure on the brake pedal. BRAKE OVER ACCELERATOR
- RAPTOR
In the event the accelerator pedal
becomes stuck or entrapped, apply steady
and firm pressure to the brake pedal to
slow the vehicle and reduce engine power.
If you experience this condition, apply the
brakes and bring your vehicle to a safe
stop. Move the transmission to park (P),
switch the engine off and apply the parking
brake. Inspect the accelerator pedal for
any interference. If none are found and the
condition persists, have your vehicle towed
to the nearest authorized dealer.
Note:
Certain drive modes can disable
brake over accelerator for off-road driving.
BRAKE OVER ACCELERATOR
In the event the accelerator pedal
becomes stuck or entrapped, apply steady
and firm pressure to the brake pedal to
slow the vehicle and reduce engine power.
If you experience this condition, apply the
brakes and bring your vehicle to a safe
stop. Move the transmission to park (P),
switch the engine off and apply the parking
brake. Inspect the accelerator pedal for
any interference. If none are found and the
condition persists, have your vehicle towed
to the nearest authorized dealer.
LOCATING THE BRAKE FLUID
RESERVOIR
See
Under Hood Overview (page 504).
308
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Brakes

CHECKING THE BRAKE FLUID
WARNING: Do not use any fluid
other than the recommended brake fluid
as this will reduce brake efficiency. Use
of incorrect fluid could result in the loss
of vehicle control, serious personal injury
or death. WARNING:
Only use brake fluid
from a sealed container. Contamination
with dirt, water, petroleum products or
other materials may result in brake
system damage or failure. Failure to
adhere to this warning could result in the
loss of vehicle control, serious personal
injury or death. WARNING:
Do not allow the fluid
to touch your skin or eyes. If this
happens, rinse the affected areas
immediately with plenty of water and
contact your physician. WARNING:
The brake system
could be affected if the brake fluid level
is below the MIN mark or above the MAX
mark on the brake fluid reservoir. 1. Park your vehicle on a level surface.
2. Look at the brake fluid reservoir to see
where the brake fluid level is relative
to the MIN and the MAX marks on the
reservoir.
Note: To avoid fluid contamination, the
reservoir cap must remain in place and fully
tight, unless you are adding fluid.
Only use fluid that meets our
specifications.
See Capacities and
Specifications (page 574).
BRAKE FLUID SPECIFICATION
See Brake Fluid Specification
(page 613).
309
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing BrakesE170684

BRAKES –
TROUBLESHOOTING
BRAKES – WARNING LAMPS
If the ABS indicator illuminates
when you are driving, this
indicates a malfunction. Your
vehicle continues to have normal braking
without the anti-lock braking system
function. See an authorized dealer.
It also momentarily illuminates when you
switch the ignition on to confirm the lamp
is functional. If it does not illuminate when
you switch the ignition on, or begins to
flash at any time, have the system checked
by an authorized dealer. The brake indicator momentarily
illuminates when you switch the
ignition on to confirm the lamp
is functional. It may also illuminate when
you apply the parking brake and the
ignition is on. If it illuminates when your
vehicle is moving, make sure the parking
brake is disengaged. If the parking brake
is disengaged, this indicates low brake fluid
level or a brake system fault. See an
authorized dealer.
BRAKES – FREQUENTLY ASKED
QUESTIONS
Is it normal for my brakes to make
noise?
Occasional brake noise is normal. If a
metal-to-metal, continuous grinding,
or continuous squeal sound is present,
the brake lining could be worn-out.
Have the system checked by an
authorized dealer. There is an electrical motor sound
when I press on the brake pedal or
activate the park brake switch. Is this
normal?
Yes, those sounds are the electronic
brake booster or the electronic park
brake operating.
Note: Brake dust could accumulate on the
wheels, even under normal driving
conditions. Some dust is normal as the
brakes wear and does not contribute to
brake noise. See Cleaning Wheels (page
535).
310
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Brakes E270480

WHAT IS THE ELECTRIC
PARKING BRAKE
The electric parking brake is used to hold
your vehicle on slopes and flat roads.
APPLYING THE ELECTRIC
PARKING BRAKE
WARNING: Always fully apply the
parking brake and make sure you shift
into park (P). Failure to follow this
instruction could result in personal injury
or death. WARNING:
If you drive extended
distances with the parking brake applied,
you could cause damage to the brake
system. The switch is on the lower part
of the instrument panel.
1. Pull the switch up.
The red warning lamp flashes during
operation and illuminates when the parking
brake is applied.
Note: You can apply the electric parking
brake when the ignition is off.
Note: The electric parking brake could
apply when you shift into park (P).
See Park
(P) (page 281).
APPLYING THE ELECTRIC
PARKING BRAKE IN AN
EMERGENCY
You can use the electric parking brake to
slow or stop your vehicle in an emergency.
1. Pull the switch up and hold it. The electric parking brake continues to
slow your vehicle down unless you release
the switch.
The red warning lamp illuminates, a tone
sounds and the stoplamps turn on when
you use the electric parking brake in an
emergency.
Note:
Do not apply the electric parking
brake when your vehicle is moving, except
in an emergency. If you repeatedly use the
electric parking brake to slow or stop your
vehicle, you could cause damage to the
brake system.
MANUALLY RELEASING THE
ELECTRIC PARKING BRAKE
1. Switch the ignition on.
2. Press and hold the brake pedal.
3. Push the switch down.
The red warning lamp turns off.
Pulling Away on a Hill When Towing a
Trailer
1. Press and hold the brake pedal.
2. Pull the switch upward and hold it.
3. Shift into gear.
4. Press the accelerator pedal until engine
has developed sufficient torque to
prevent your vehicle from rolling down
the hill.
5. Release the switch and pull away in a normal manner.
AUTOMATICALLY RELEASING
THE ELECTRIC PARKING
BRAKE
1. Close the driver door.
2. Shift into gear.
311
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Electric Parking BrakeE267156

3. Press the accelerator pedal and pull
away in a normal manner.
ELECTRIC PARKING BRAKE
AUDIBLE WARNING
Sounds when the parking brake is on and
your vehicle is moving. If the warning tone
continues after you have released the
parking brake, this indicates a malfunction.
Have your vehicle checked as soon as
possible.
RELEASING THE ELECTRIC
PARKING BRAKE IF THE
VEHICLE BATTERY HAS RUN
OUT OF CHARGE WARNING: The electric parking
brake does not operate if the vehicle
battery has run out of charge.
Connect a booster battery to the vehicle
battery to release the electric parking brake
if the vehicle battery has run out of charge.
See
Jump Starting the Vehicle (page
486). ELECTRIC PARKING BRAKE –
TROUBLESHOOTING
ELECTRIC PARKING BRAKE –
WARNING LAMPS
Brake System It illuminates red when you apply
the parking brake and your
vehicle is on. If the lamp flashes
when the parking brake has been
released, this indicates the
parking brake system requires
service. Have your vehicle checked as
soon as possible.
Note: Lamps may vary depending on region.
Electric Parking Brake When the lamp illuminates
yellow, it indicates a malfunction
in the electric parking brake.
Have your vehicle checked as soon as
possible.
312
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Electric Parking BrakeE270480 E146190

ELECTRIC PARKING BRAKE – INFORMATION MESSAGES
Action
Message
The electric parking brake is set and a manual releaseis attempted without the brake pedal being pressed.
To Release: Press Brake and
Switch
The electric parking brake is set and an automaticrelease is attempted but cannot be performed. Perform a manual release.
Park Brake Use Switch to
Release
The electric parking brake is set and your vehicle speedexceeds 3 mph (5 km/h). Release the parking brake
before continuing driving.
Release Park Brake
The electric parking brake is not fully applied.
Park Brake Not Applied
The electric parking brake is not fully released.
Park Brake Not Released
The electric parking brake system has been put into aspecial mode that is used to allow service of the rear brakes. Contact an authorized dealer.
Park Brake Maintenance Mode
The electric parking brake system has detected a
condition that requires service. Some functionality
may still be available. Contact an authorized dealer.
Park Brake Limited Function
Service Required
The electric parking brake system has detected a
condition that requires service. Contact an authorized dealer.
Park Brake Malfunction Service
Now
313
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Electric Parking Brake

WHAT IS REVERSE BRAKING
ASSIST
The system uses sensors on the rear of
your vehicle to detect a possible collision
and applies the brakes to either reduce the
damage from impact, or to assist in
avoiding the collision.
HOW DOES REVERSE
BRAKING ASSIST WORK
Reverse Braking Assist functions when in
reverse (R) and traveling at a speed of
1–
7 mph (1.5– 12 km/h).
If the system detects an obstacle behind
your vehicle, it provides a warning through
the rear parking aid or cross traffic alert
system.
REVERSE BRAKING ASSIST
PRECAUTIONS 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:
To help avoid personal
injury, always use caution when in
reverse (R) and when using the sensing
system. 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. WARNING: 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. WARNING:
Some situations and
objects prevent hazard detection. For
example low or direct sunlight, inclement
weather, unconventional vehicle types,
and pedestrians. Apply the brakes when
necessary. Failure to follow this
instruction could result in the loss of
control of your vehicle, personal injury or
death. WARNING:
Do not use the system
with accessories that extend beyond the
front or rear of your vehicle, for example
a trailer hitch or bike rack. The system is
not able to make corrections for the
additional length of the accessories.
The system only applies the brakes for a
short period of time when an event occurs.
Act as soon as you notice the brakes apply
in order to remain in control of the vehicle.
Note: Certain add-on devices around the
bumper or fascia may create false alerts.
For example, large trailer hitches, bicycle or
surfboard racks, license plate brackets,
bumper covers or any other device that may
block the normal detection zone of the
system. Remove the add-on device to
prevent false alerts.
Note: The system does not react to small
or moving objects, particularly those close
to the ground.
Note: The system does not operate during
hard acceleration or steering.
314
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Reverse Braking Assist
(If Equipped)

Note:
If your vehicle sustains damage to
the bumper or fascia leaving it misaligned
or bent, it could alter the sensing zone
causing inaccurate measurement of
obstacles or false alerts.
Note: Vehicle loading and suspension
changes can impact the angle of the sensors
and may change the normal detection zone
of the system resulting in inaccurate
measurement of obstacles or false alerts.
Note: When you connect a trailer, the
system may detect the trailer and provide
an alert, or the system turns off. If the
system does not turn off, switch the system
off manually after you connect the trailer.
Note: You may experience reduced system
performance on road surfaces that limit
deceleration. For example, roads with ice,
loose gravel, mud or sand.
SWITCHING REVERSE
BRAKING ASSIST ON AND OFF
1. Press Features on the touchscreen. 2. Press
Driver Assistance.
3. Switch
Reverse Brake Assist on or off.
Note: The system is unavailable when rear
parking aid or cross traffic alert is off.
OVERRIDING REVERSE
BRAKING ASSIST
There could be instances when
unexpected or unwanted braking occurs.
Firmly pressing the accelerator pedal or
switching the feature off overrides the
system.
REVERSE BRAKING ASSIST
INDICATORS
If the system determines that a collision
with an obstacle may occur, full braking
may apply. Bring your vehicle to a stop a
safe distance away from the obstacle. A message and warning
indicator appear when the
system applies the brakes.
REVERSE BRAKING ASSIST – TROUBLESHOOTING
REVERSE BRAKING ASSIST – INFORMATION MESSAGES Action
Message
Make sure that all doors, liftgate and hoodare closed. Drive the vehicle on a straight road for a short period. Make sure the
parking aids and cross traffic alert systems
are on. If the message remains on, have the system checked as soon as possible.
Reverse Brake Assist Not Available See
Manual
Displays when a system error has occurred.Have your vehicle checked as soon as possible.
Reverse Brake Assist Fault
Displays when reverse brake assist is off.
Reverse Brake Assist Off
315
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Reverse Braking Assist
(If Equipped)E293490

REVERSE BRAKING ASSIST –
FREQUENTLY ASKED QUESTIONS
Why is reverse braking assist unavailable?
•
Make sure that all doors, liftgate and
hood are closed. Drive the vehicle on a
straight road for a short period. If the
message remains, contact an
authorized dealer.
• Make sure the cross traffic alert system
is on. See How Does Cross Traffic
Alert Work (page 393).
• Make sure the rear parking aid system
is on.
See What is the Rear Parking
Aid (page 334).
• Make sure traction control is on. See
Traction Control
(page 319).
• The vehicle has sustained a rear end
impact. Contact an authorized dealer
to have the sensors checked for proper
coverage and operation.
• An ABS, traction control or stability
control event may have occurred.
Reverse braking assist resumes
operation when the event is complete.
• Make sure the rear view camera and
360 degree camera are not dirty or
obstructed. If dirty, clean the camera.
If the message still appears after
cleaning the camera, wait a short time
and the message should clear. If the
message does not clear, contact an
authorized dealer.
• Make sure there are no blocked or
faulted sensors.
See How Does Cross
Traffic Alert Work (page 393).
• You recently had your vehicle serviced,
or the battery disconnected. Drive your
vehicle a short distance to resume
system operation.
• Reverse braking assist does not
function when you connect a trailer.
Operation resumes when you
disconnect the trailer. Note:
If the answers to why the system is
unavailable do not assist in returning reverse
braking assist to available, have the system
checked as soon as possible.
316
F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Reverse Braking Assist
(If Equipped)