Transmi FORD F-150 2021 Workshop Manual

FOUR-WHEEL DRIVE –
TROUBLESHOOTING
FOUR-WHEEL DRIVE – WARNING
LAMPS
Illuminates when a four-wheel
drive or power train fault is
present.
Note:
When a system fault is present, the
system can typically remain in whichever
mode was selected prior to the fault
condition occurring. It does not default to
two-wheel drive in all circumstances. When
this warning is displayed, have your vehicle
serviced by an authorized dealer.
FOUR-WHEEL DRIVE – INFORMATION MESSAGES - RAPTOR Action
Message
A four-wheel drive system fault is present.Have your vehicle checked as soon as possible.
Check 4x4
The four-wheel drive system is making ashift.
4x4 Shift in Progress
Displays when you attempt to switch to
four-wheel drive low mode and you do not shift the transmission to neutral (N).
For 4x4 LOW Shift to N
Displays when you attempt to switch tofour-wheel drive low mode and your
vehicle's speed is greater than 3 mph
(5 km/h).
For 4x4 LOW Slow to 3 MPH
For 4x4 LOW Slow to 5 km/h
Displays when you attempt to switch from
four-wheel drive low mode and you do notshift the transmission to neutral (N).
To Exit 4x4 LOW Shift to N
Displays when you attempt to switch fromfour-wheel drive low mode and your
vehicle's speed is greater than
3 mph
(5 km/h).
To Exit 4x4 LOW Slow to 3 MPH
To Exit 4x4 LOW Slow to 5 km/h
Displays when there is a transfer case geartooth blockage while shifting to or from
four-wheel drive low mode or to the neutral state. Place the transmission in a forward
gear, move your vehicle forward approxim-
ately
5 ft (1.5 m), and shift the transmission
back to neutral (N) to allow the transfer case to complete the range shift.
Shift Delayed Drive Forward
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(If Equipped)

Action
Message
Displays when the four-wheel drive systemdetects a mechanical shift block when
shifting out of four-wheel drive high. See
Four-Wheel Drive Limitations (page 292).
4x4 Unable to Disengage. See Manual
Displays when the four-wheel drive systemresumes normal function.
4x4 Restored
Displays when the four-wheel drive systemdetects driving conditions which tempor- arily require greater four-wheel drive
performance. The system automatically
resumes normal function after the system
no longer detects these driving conditions.
4X4 Temporarily Locked
Displays when the system requires an
additional transmission shift to neutral (N) to complete a transfer case shift.
Shift to Neutral
Displays when you command a four-wheeldrive shift during conditions which arepotentially harmful to the driveline components.
To Engage 4x4 Slow to 3 MPH
To Engage 4x4 Slow to 5 km/h
Displays when the four-wheel drive systemrequests that you release the accelerator
pedal to complete a four-wheel drive shift.
See Selecting a Four-Wheel Drive Mode (page 294).
To Engage 4x4 Release Accelerator Pedal
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Four-Wheel Drive
(If Equipped)

FOUR-WHEEL DRIVE – INFORMATION MESSAGES
Action
Message
A four-wheel drive system fault is present.Have your vehicle checked as soon as possible.
Check 4x4
The four-wheel drive system is making ashift.
4x4 Shift in Progress
Displays when you attempt to switch to
four-wheel drive low mode and you do not shift the transmission to neutral (N).
For 4x4 LOW Shift to N
Displays when you attempt to switch tofour-wheel drive low mode and your
vehicle's speed is greater than 3 mph
(5 km/h).
For 4x4 LOW Slow to 3 MPH
For 4x4 LOW Slow to 5 km/h
Displays when you attempt to switch from
four-wheel drive low mode and you do notshift the transmission to neutral (N).
To Exit 4x4 LOW Shift to N
Displays when you attempt to switch fromfour-wheel drive low mode and your
vehicle's speed is greater than
3 mph
(5 km/h).
To Exit 4x4 LOW Slow to 3 MPH
To Exit 4x4 LOW Slow to 5 km/h
Displays when there is a transfer case geartooth blockage while shifting to or from
four-wheel drive low mode or to the neutral state. Place the transmission in a forward
gear, move your vehicle forward approxim-
ately
5 ft (1.5 m), and shift the transmission
back to neutral (N) to allow the transfer case to complete the range shift.
Shift Delayed Drive Forward
Displays when the four-wheel system
detects elevated system temperature and temporarily stops providing power to thefront wheels. The system automatically
resumes normal function when the system temperature returns to normal.
4x4 Temporarily Disabled
Displays when the four-wheel drive systemdetects a mechanical shift block when
shifting out of four-wheel drive high. See
Four-Wheel Drive Limitations (page 292).
4x4 Unable to Disengage. See Manual
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Four-Wheel Drive
(If Equipped)

Action
Message
Displays when the four-wheel drive systemresumes normal function.
4x4 Restored
Displays when the four-wheel drive system
detects driving condition which temporarilyrequire greater four-wheel drive perform-ance. The system automatically resumes
normal function after the system no longer detects these driving conditions.
4X4 Temporarily Locked
Displays when the system requires an
additional transmission shift to neutral (N) to complete a transfer case shift.
Shift to Neutral
Displays when you command a four-wheeldrive shift during conditions which arepotentially harmful to the driveline components
To Engage 4x4 Slow to 3 MPH
To Engage 4x4 Slow to 5 km/h
Displays when the four-wheel drive systemrequests that you release the accelerator
pedal to complete a four-wheel drive shift.
See Selecting a Four-Wheel Drive Mode (page 294).
To Engage 4x4 Release Accelerator Pedal
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(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).
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Side Wind Stabilization
Side wind stabilization is an advanced
feature that works by carefully applying
the brakes on one side of the vehicle to
reduce the effect of a side wind gust on
the vehicle's path.
Torque Vectoring by Brakes
Torque vectoring control applies brake
torque on the inner driven wheel in a curve
for better traction to avoid an understeer,
or oversteer situation. Unlike electronic
stability control, enhanced torque
vectoring control does not slow the
vehicle. It helps control excessive wheel
slip and gives the vehicle improved
cornering agility.
Traction Control
Traction control enhances your vehicle
’s
ability to maintain traction of the wheels
by detecting and controlling wheel spin.
See What Is Traction Control (page 319). Vehicle without stability control
skidding off its intended route.
A
Vehicle with stability control
maintaining control on a slippery
surface.
B
SWITCHING STABILITY
CONTROL ON AND OFF
Stability Control turns on each time you
switch the ignition on.
You can switch the stability control off by
pressing and holding the stability and
traction control button off for 5-15
seconds, or you can press the button again
to switch the system on.
Shifting the transmission into reverse (R)
will disable the system.
You can switch the traction control system
off or on independently. See Switching
Traction Control On and Off (page 319).
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WHAT IS TRAIL CONTROL -
RAPTOR
WARNING: The system does not
control speed in low traction conditions
or extremely steep slopes. 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
personal injury.
Trail control lets you focus on steering
during low-speed and off-road use by
controlling your vehicle's acceleration and
braking to maintain the speed that you set.
You may hear a noise from the anti-lock
brake system pump motor when you use
the system. This is normal.
TRAIL CONTROL LIMITATIONS
- RAPTOR
Trail control is unavailable when any of the
following occur:
• Your vehicle speed is greater than
20 mph (32 km/h)
in two-wheel drive
high (2H) or four-wheel drive high (4H)
modes.
• Your vehicle speed is greater than
9 mph (15 km/h)
in four-wheel drive
low (4L) mode.
• Your vehicle speed is greater than
5 mph (8 km/h)
in reverse (R).
• The transmission is in park (P).
• The driver side door is open or your
seatbelt is off when the driver side door
is removed.
• Cruise control is on.
• Pro trailer backup assist is on. SWITCHING TRAIL CONTROL
ON AND OFF - RAPTOR Press the button.
The system switches off if you press the
button again or exceed 40 mph (64 km/h).
SETTING THE TRAIL CONTROL
SPEED - RAPTOR
Note: The buttons are located on the
steering wheel.
Drive to your preferred speed. Press button to increase the set
current speed.
Press button to decrease the set
current speed.
Note: The indicator changes color.
You can adjust the set speed in small or
large increments. Press the toggle button
upward or downward once to adjust the
set speed in small increments. Press and
hold the toggle button upward or
downward to adjust the set speed in large
increments.
You can also adjust the set speed by
braking.
Note: Pressing the brake pedal does not
switch off the system.
CANCELING THE SET SPEED -
RAPTOR Press the button.
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TRAIL CONTROL INDICATORS
- RAPTOR
TRAIL ONE PEDAL DRIVE (IF
EQUIPPED)
WHAT IS TRAIL ONE PEDAL DRIVE
Trail one pedal drive allows you to
accelerate and brake using only the
accelerator pedal. The system assists
when driving through difficult off-road
terrain. Pressing the accelerator pedal
down accelerates your vehicle and
releasing pressure on the accelerator
pedal, with your foot still on the pedal,
slows your vehicle down. Releasing the
accelerator pedal may allow your vehicle
to come to a complete stop, some
situations may require you to press the
brake pedal to come to a complete stop.
TRAIL ONE PEDAL DRIVE
PRECAUTIONS WARNING:
This system is an extra
driving aid. It does not replace your
attention and judgment, or the need to
apply the brakes. This system does NOT
automatically brake your vehicle. If you
fail to press the brake pedal when
necessary, you may collide with another
vehicle.
Shifting into drive (D) or reverse (R) does
not cause the vehicle to move.
You can press the brake pedal to increase
braking. This does not turn the system off. Trail one pedal drive could apply the
parking brake when your vehicle is not
moving and not in park (P).
Note:
Always check the transmission
selection before accelerating.
Note: Only use trail one pedal drive on
slippery or loose surfaces. Using trail one
pedal drive on dry, hard surfaces could
produce some vibration, driveline bind up
and potential excessive tire and vehicle
wear.
TRAIL ONE PEDAL DRIVE
LIMITATIONS
Trail one pedal drive is unavailable when
any of the following occur:
• Your vehicle is not in four-wheel drive
high (4H) or four-wheel drive low (4L)
modes.
• Using cruise control.
• Using trail control.
• You exceed
30 mph (48 km/h).
Releasing the accelerator pedal may allow
your vehicle to come to a complete stop,
some situations may require you to press
the brake pedal to come to a complete
stop.
SWITCHING TRAIL ONE PEDAL
DRIVE ON AND OFF
Switching Trail One Pedal Drive On Press the trail features button
when in four-wheel drive high or
four-wheel drive low to activate
trail one pedal drive.
Switching Trail One Pedal Drive
Off
Press the trail features button again to
switch trail one pedal drive off.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Trail ControlE272858 E332910

WHAT IS HILL DESCENT
CONTROL
Hill descent control allows the driver to set
and maintain vehicle speed while
descending steep slopes in various surface
conditions.
HOW DOES HILL DESCENT
CONTROL WORK
Hill descent control can maintain vehicle
speeds on downhill slopes between
2
– 20 mph (3– 32 km/h). Above 20 mph
(32 km/h), the system remains on but the
descent speed cannot be set or
maintained.
Note: The system does not function below
2 mph (3 km/h)
.
The system requires a cool down interval
after a period of sustained use. Hill descent
control 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.
Note: The amount of time that the system
can remain active before cooling varies with
conditions.
HILL DESCENT CONTROL
PRECAUTIONS WARNING:
The system does not
control speed in low traction conditions
or extremely steep slopes. 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
personal injury. 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:
The system does not
replace the parking brake. When you
leave your vehicle, always apply the
parking brake and shift the transmission
into park (P) for automatic transmission
or first gear for manual transmission.
SWITCHING HILL DESCENT
CONTROL ON AND OFF Press the button on the
instrument panel. A light
illuminates and a tone sounds
when the system is active.
SETTING THE HILL DESCENT
SPEED
To increase or decrease the descent speed,
press the accelerator or brake pedal, or use
the SET
+ and SET - buttons on the
steering wheel. Once you reach the
preferred speed remove your feet from the
pedals.
HILL DESCENT CONTROL
INDICATOR Illuminates when you switch hill
descent control on.
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Hill Descent Control
(If Equipped)E163171 E163171

HILL DESCENT CONTROL – TROUBLESHOOTING
HILL DESCENT CONTROL – INFORMATION MESSAGES
Action
Message
Your vehicle speed requirement for off-road modeentry has not been met.
For Hill Descent Reduce Speed
XX MPH/km/h or Less
You need to select a transmission gear for hill descentmode.
For Hill Descent Select Gear
Hill descent control mode is deactivated and you mustresume control.
Hill Descent Driver Resume
Control
A hill descent system fault is present.
Hill Descent Control Fault
The hill descent system is cooling due to overuse.
Hill Descent Control Off System
Cooling
The hill descent system cannot activate while CruiseControl is actively controlling speed.
Hill Descent Control not avail-
able with Cruise Control Active
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F-150 (TFD) Canada/United States of America, enUSA, Edition date: 202104, Second-Printing Hill Descent Control (If Equipped)