four wheel drive FORD F-150 2021 Service Manual

LOAD CARRYING
PRECAUTIONS
Keep your loaded vehicle weight
within its design rating capability,
with or without a trailer. Properly
loading your vehicle provides
maximum return of vehicle design
performance. Before you load your
vehicle, become familiar with the
following terms for determining
your vehicle
’s weight rating, with
or without a trailer, from the
vehicle ’s Tire and Loading
Information label or Safety
Compliance Certification label. WARNING: Vehicles with
a higher center of gravity (utility
and four-wheel drive vehicles)
handle differently than vehicles
with a lower center of gravity
(passenger cars). Avoid sharp
turns, excessive speed and
abrupt steering in these vehicles.
Failure to drive cautiously
increases the risk of losing
control of your vehicle, vehicle
rollover, personal injury and
death. WARNING:
The
appropriate loading capacity of
your vehicle can be limited either
by volume capacity (how much
space is available) or by payload
capacity (how much weight the
vehicle should carry). Once you
have reached the maximum payload of your vehicle, do not
add more cargo, even if there is
space available. Overloading or
improperly loading your vehicle
can contribute to loss of vehicle
control and vehicle rollover.
WARNING:
Exceeding the
Safety Compliance Certification
label vehicle weight limits can
adversely affect the
performance and handling of
your vehicle, cause vehicle
damage and can result in the
loss of control of your vehicle,
serious personal injury or death. WARNING:
Do not use
replacement tires with lower
load carrying capacities than the
original tires because they may
lower your vehicle's GVWR and
GAWR limitations. Replacement
tires with a higher limit than the
original tires do not increase the
GVWR and GAWR limitations. WARNING:
Do not exceed
the GVWR or the GAWR
specified on the certification
label. WARNING: Exceeding any
vehicle weight rating can
adversely affect the
performance and handling of
your vehicle, cause vehicle
damage and can result in the
loss of control of your vehicle,
serious personal injury or death.
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5. When with other vehicles, it is
recommended that communication is
used, and the lead vehicle notify other
vehicles of obstacles that could cause
potential vehicle damage.
6. Always keep available ground clearance in mind and pick a route that
minimizes the risk of catching the
underside of the vehicle on an obstacle.
7. When negotiating low speed obstacles,
applying light brake pressure in
conjunction with the throttle will help
prevent the vehicle from jerking and
will allow you to negotiate the obstacle
in a more controlled manner. Using 4L
will also help with this.
8. Off-roading requires a high degree of concentration. Even if your local law
does not prohibit alcohol use while
driving off-road, Ford strongly
recommends against drinking if you
plan to off-road.
Crossing Obstacles
• Review the path ahead before
attempting to cross any obstacle. It is
best if the obstacle is reviewed from
outside the vehicle so that there is a
good understanding of terrain condition
both in front of and behind the
obstacle.
• Approach obstacles slowly.
• If a large obstacle such as a rock
cannot be avoided, choose a path that
places the rock directly under the tire
rather than the undercarriage of the
vehicle. This will help prevent damage
to the vehicle.
• Ditches and washouts should be
crossed at a 45° angle, allowing each
wheel to independently cross the
obstacle. Hill Climbing WARNING:
Extreme care should
be used when steering the vehicle in
reverse down a slope so as not to cause
the vehicle to swerve out of control.
• Always attempt to climb a steep hill
along the fall line of the slope and not
diagonally.
• If the vehicle is unable to make it up
the hill, DO NOT attempt to turn back
down the slope. Place the vehicle in
low range and slowly back down in
reverse.
• When descending a steep slope, select
low gear and engage hill descent
control. Use the throttle and brake
pedals to control your descent speed.
Note: Hill descent control is functional in
reverse and should be used in this situation.
DRIVING OFF-ROAD - RAPTOR
Driving In Snow and Ice WARNING:
Do not become
overconfident in the ability of four-wheel
drive vehicles. Although a four-wheel
drive vehicle may accelerate better than
a two-wheel drive vehicle in low traction
situations, it won't stop any faster than
two-wheel drive vehicles. Always drive
at a safe speed.
Make sure you allow sufficient distance
between your vehicle and other vehicles
for stopping.
Driving In Sand
When driving over sand, try to keep all four
wheels on the most solid area of the trail.
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DRIVING THROUGH WATER
LIMITATIONS - RAPTOR
Maximum Wading
Depth
Model
32 in (810 mm)
All.
When you are driving though water do not
exceed 4 mph (7 km/h).
WATER WADING WARNING:
Do not attempt to
cross a deep, fast flowing body of water.
Failure to follow this instruction could
result in the loss of control of your
vehicle, personal injury or death.
As the water depth increases, you must
reduce your vehicle speed to avoid
potential vehicle damage. •
Always determine the depth before
attempting a water crossing. Never
drive through water that is higher than
the bottom of the wheel hubs.
• Slowly proceed and avoid splashing
water any more than is necessary. •
Be aware that obstacles and debris
may be beneath the water ’s surface.
• Keep the doors fully closed during the
water crossing.
• After driving through water and as soon
as it is safe to do so check the brakes,
horn, lights, and steering wheel to
confirm those systems are functioning
properly.
Note: Engine damage can occur if water
enters the air filter.
OFF-ROAD DRIVING AIDS -
RAPTOR
Selecting an Off-Road Drive Mode
Using the appropriate drive mode increases
your vehicle's control. See
Drive Mode
Control (page 371).
Using Four-Wheel Drive
Your vehicle has a four-wheel drive system
that offers various modes to help you
optimize traction on any off-road surface.
See
Four-Wheel Drive (page 291).
Using the Cameras Off-Road
Use the 360 degree camera to enhance
your off-road experience. See 360 Degree
Camera
(page 342).
Using the Rear Differential Lock
When engaged, the rear differential lock
provides additional traction to your vehicle
by forcing the two rear wheels to turn at
the same speed.
Note: Rear differential lock is only available
when the vehicle is in 4H or 4L. See
Electronic Locking Differential (page 301).
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WARNING: Always re-inflate tires
to recommended tire pressures before
the vehicle is operated on-road. The
recommended pressure is located on the
tire label or safety certification label,
located on the B-pillar, inside the driver's
door.
Driving off-road places more stress on your
vehicle than most on-road driving. After
driving off-road check for damage to your
vehicle and, if necessary, have your vehicle
fixed as soon as possible.
Inspect the underbody of your vehicle by
checking tires, body structure, steering,
suspension, and exhaust system for
damage.
Check the radiator for mud and debris and
clean as needed.
Remove accumulations of plants or brush.
These things could be a fire hazard or hide
damage to the fuel lines, brake hoses, and
propeller shafts.
After extended operation in mud, sand,
water, or similar dirty conditions, inspect
the underbody and clean your vehicle as
soon as possible.
If you experience unusual vibration after
driving in mud, slush or similar conditions,
check the wheels for impacted material.
Impacted material can cause vibrations
while driving and wheel imbalance.
Remove the material to resolve the
problem.
COLD WEATHER
PRECAUTIONS
The functional operation of some
components and systems can be affected
at temperatures below approximately
-13°F (-25°C)
. 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 your vehicle slides while
cornering, steer in the direction of the
slide until you regain control of your
vehicle.
On ice and snow, you should drive more
slowly than usual. Your vehicle has a four
wheel anti-lock brake system, do not pump
the brake pedal.
See Anti-Lock Braking
System Limitations (page 308).
BREAKING-IN
Your vehicle requires a break-in period. For
the first 1,000 mi (1,600 km), avoid driving
at high speeds, heavy braking, aggressive
shifting or using your vehicle to tow. During
this time, your vehicle may exhibit some
unusual driving characteristics.
DRIVING ECONOMICALLY
The following helps to improve fuel
consumption:
• There is no need to wait for your engine
to warm up. The vehicle is ready to
drive immediately after starting.
• Your fuel consumption should improve
throughout your hybrid's break-in
period.
• Accelerate and slow down in a smooth,
moderate fashion.
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TRANSPORTING THE VEHICLE
If you need to tow your vehicle, contact a
professional towing service or your
roadside assistance service provider.
Your manufacturer produces a towing
manual for all authorized tow truck
operators. Have your tow truck operator
refer to this manual for proper hook-up
and towing procedures.
We recommend the use of a wheel lift and
dollies or flatbed equipment to tow your
vehicle. Vehicle damage could occur if
towed incorrectly, or by any other means.
Front-wheel and rear-wheel drive vehicles
must have their designated drive wheels
off the ground regardless of towing
direction. Use tow dollies to prevent
damage to the transmission. All-wheel or four-wheel drive vehicles
require that all wheels be off the ground
using a wheel lift and dollies or flatbed
equipment. This prevents damage to the
transmission and drive system.
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TOWING YOUR VEHICLE
PRECAUTIONS
Use the following guidelines when towing
your vehicle. Failure to follow this
instruction could result in vehicle damage
not covered by the vehicle warranty.
Note:
Make sure you properly secure your
vehicle to the tow vehicle.
Note: If you are unsure of the vehicle ’s
configuration, contact an authorized dealer.
RECREATIONALLY TOWING
YOUR VEHICLE - 4X4 WARNING: Do not disconnect the
battery when recreationally towing your
vehicle. This prevents the transfer case
from shifting properly and could cause
the vehicle to roll, even if the
transmission is in park (P). WARNING:
Placing the transfer
case in its neutral position could cause
your vehicle to freely roll. Make sure you
press and hold the brake pedal and the
vehicle is in a secure, safe position when
you place the transfer case in its neutral
position.
Follow these guidelines if you have a need
for recreational towing. An example of
recreational towing would be towing your
vehicle behind a motorhome. These
guidelines are to make sure that you do
not damage the transmission. You can only tow your vehicle with all
wheels on the ground by placing the
transfer case in its neutral position and
engaging the recreational tow feature.
Perform the following steps after
positioning your vehicle behind the tow
vehicle and properly securing them
together.
Note:
Put your climate control system in
recirculated air mode to prevent exhaust
fumes from entering your vehicle.
Note: Failure to put the transfer case in its
neutral position can damage vehicle
components.
Note: You can check the towing status at
any time by opening the driver door or
turning the ignition to the accessory or on
position. Neutral Tow Enabled Leave
Transmission in Neutral
appears in the
instrument cluster display to confirm you
can recreationally tow your vehicle.
Note: If your vehicle has an anti-theft
alarm, make sure you switch perimeter
sensing on when towing. See
Setting the
Alarm Security Level (page 135).
Switching
Neutral Tow On
1. Start your vehicle.
2. Press the 2H button on the four-wheel
drive mode control.
3. Place your vehicle in temporary neutral
mode. See
Entering Temporary
Neutral Mode (page 286).
4. Switch your vehicle off by pressing the
push button ignition switch once or
turning the key as far toward the off
position as possible. A message
appears in the instrument cluster
display.
5. Switch your vehicle to accessory mode
by pressing the push button ignition
switch once without pressing the brake
pedal or by turning the key to the on
position.
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Note:
You may hear a noise as the transfer
case shifts out of its neutral position. This
is normal.
5. Make sure the instrument cluster displays Neutral Tow Disabled.
RECREATIONALLY TOWING
YOUR VEHICLE - 4X2
You cannot recreational tow your vehicle
with all wheels on the ground because
vehicle or transmission damage could
occur. You must recreational tow your
vehicle with all four wheels off the ground,
such as when using a car-hauling trailer.
Otherwise, you cannot recreational tow
your vehicle. EMERGENCY TOWING
If your vehicle becomes inoperable without
access to wheel dollies or a vehicle
transport trailer, it can be flat-towed with
all wheels on the ground, regardless of the
powertrain and transmission configuration,
under the following conditions:
•
Your vehicle is facing forward for
towing in a forward direction.
• Use the manual park release
procedure. See
Using Manual Park
Release (page 288). Failure to do so
may result in damage to the
transmission.
• Maximum speed is 35 mph (56 km/h).
• Maximum distance is
50 mi (80 km).
TOWING YOUR VEHICLE – TROUBLESHOOTING
TOWING YOUR VEHICLE – INFORMATION MESSAGES Description
Message
The transfer case is in the neutral position and your vehicleis safe to tow with all four wheels on the ground.
Neutral Tow Enabled
Leave Transmission in Neutral
There is a transfer case gear tooth blockage present. With
your vehicle on, shift the transmission into drive (D) and let the vehicle roll forward, up to
3 ft (1 m).
Shift Delayed Drive
Forward
The transfer case is not in the neutral position and your vehicleis not safe to tow with all four wheels on the ground.
Neutral Tow Disabled
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Protected Component
Rating
Item
Four-wheel drive.
25 A
64
Transmission controlmodule (diesel).
15 A
65
Transmission run/start.
20 A
67
Left-hand windshield wiper.
30 A
69
Four-wheel drive.
25 A
82
Supplemental heater(diesel).
50 A
83
Supplemental heater(diesel).
50 A
84
Supplemental heater(diesel).
50 A
85
Selective catalytic reductionsystem (diesel).
25 A
86
Trailer tow light module.
20 A
91
Powertrain control modulepower (hybrid).
15 A
95
Powertrain control modulepower (hybrid).
10 A
98
Coolant pumps (hybrid).Left-hand headlamps.
15 A
100
Right-hand headlamps.
15 A
101
Active front steering.
50 A
105
Trailer tow battery charge.
30 A
107
Spot lamps (police).
15 A
108
Fuel filter heater (diesel).
30 A
121
Rain sensor module.
5 A
124
USB smart charger.
10 A
125
Multi-contour seats relay(gas, diesel, hybrid).
25 A
134
Tailgate release.
10 A
138
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Note:
You may not find this
information on all tires because it
is not required by federal law. Speed rating
Letter
rating
81 mph (130 km/h)
M
87 mph (140 km/h)
N
99 mph (159 km/h)
Q
106 mph (171 km/h)
R
112 mph (180 km/h)
S
118 mph (190 km/h)
T
124 mph (200 km/h)
U
130 mph (210 km/h)
H
149 mph (240 km/h)
V
168 mph (270 km/h)
W
186 mph (299 km/h)
Y
Note: For tires with a maximum
speed capability over 149 mph
(240 km/h), tire manufacturers
sometimes use the letters ZR. For
those with a maximum speed
capability over 186 mph (299
km/h), tire manufacturers always
use the letters ZR.
H. U.S. DOT Tire Identification
Number (TIN): This begins with
the letters DOT and indicates that
the tire meets all federal
standards. The next two numbers
or letters are the plant code
designating where it was
manufactured, the next two are the tire size code and the last four
numbers represent the week and
year the tire was built. For
example, the numbers 317 mean
the 31st week of 1997. After 2000,
the numbers go to four digits. For
example, 2501 means the 25th
week of 2001. The numbers in
between are identification codes
used for traceability. This
information is used to contact
customers if a tire defect requires
a recall.
I.
M+S or M/S:
Mud and Snow, or
AT:
All Terrain, or
AS:
All Season.
J. Tire Ply Composition and
Material Used:
Indicates the
number of plies or the number of
layers of rubber-coated fabric in
the tire tread and sidewall. Tire
manufacturers also must indicate
the ply materials in the tire and the
sidewall, which include steel,
nylon, polyester, and others.
K. Maximum Load: Indicates the
maximum load in kilograms and
pounds that can be carried by the
tire. See the Safety Compliance
Certification Label (affixed to
either the door hinge pillar,
door-latch post, or the door edge
that meets the door-latch post,
next to the driver's seating
position), for the correct tire
pressure for your vehicle.
L. Treadwear, Traction and
Temperature Grades:
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•
Stand at a minimum of 12 ft
(3.66 m) away from the wheel
and tire assembly.
• Use both eye and ear
protection.
Important: Remember to replace
the wheel valve stems when the
road tires are replaced on your
vehicle.
It is recommended that the two
front tires or two rear tires
generally be replaced as a pair if
the worn tires still have usable
depth.
To avoid potential Four-Wheel
Drive (4WD) malfunction or
(4WD) system damage, it is
recommended to replace all four
tires rather than mixing
significantly worn tires with new
tires.
The tire pressure sensors mounted
in the wheels (originally installed
on your vehicle) are not designed
to be used in aftermarket wheels.
The use of wheels or tires not
recommended may affect the
operation of your tire pressure
monitoring system.
If the tire pressure monitoring
system indicator is flashing, your
system is malfunctioning. Your
replacement tire might be
incompatible with your tire
pressure monitoring system, or
some component of the system
may be damaged. USING SNOW CHAINS WARNING: Do not exceed 30 mph
(50 km/h)
. Failure to follow this
instruction could result in the loss of
control of your vehicle, personal injury or
death. WARNING:
Do not use snow chains
on snow-free roads. WARNING:
Only fit snow chains to
specified tires. WARNING:
If your vehicle is fitted
with wheel trims, remove them before
fitting snow chains. WARNING: If you choose to install
snow tires on your vehicle, they must be
the same size, construction, and load
range as the original tires listed on the
tire placard, and they must be installed
on all four wheels. Mixing tires of
different size or construction on your
vehicle can adversely affect your
vehicle's handling and braking, and may
lead to loss of vehicle control. WARNING:
Wheels and tires must
be the same size, load index and speed
rating as those originally fitted on the
vehicle. Use of any other tire or wheel
can affect the safety and performance
of your vehicle. Additionally, the use of
non-recommended tires and wheels can
cause steering, suspension, axle, transfer
case or power transfer unit failure.
Follow the recommended tire inflation
pressures found on the Safety
Compliance Certification label, or the
Tire Label on the B-Pillar or the edge of
the driver door. Failure to follow this
instruction could result in loss of vehicle
control, vehicle rollover, or personal injury
or death.
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