FORD F-150 2021 Owners 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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(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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(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)

WHAT IS THE ELECTRONIC
LOCKING DIFFERENTIAL
The electronic locking differential is a
device housed in the rear axle, and can
provide additional traction when needed.
HOW DOES THE ELECTRONIC
LOCKING DIFFERENTIAL
WORK - RAPTOR
You can activate the differential
electronically and shift it on the fly within
the operating speed range. The electronic
differential disengages when the vehicle
speed exceeds a set value and it reengages
when the vehicle speed goes below a set
value depending on drive mode. See
Switching the Electronic Locking
Differential On and Off (page 303). The
electronic locking differential is for use in
mud, rocks, sand, or any off-road condition
where you need maximum traction.
Note:
The electronic locking differential can
activate or deactivate automatically based
on speed, four-wheel drive mode, and drive
mode selection. See Switching the
Electronic Locking Differential On and
Off
(page 303).
Note: The electronic locking differential is
for off-road use only and is not for use on
dry pavement. Using the electronic locking
differential on dry pavement results in
increased tire wear, noise and vibration.
Note: The electronic locking differential is
not available in 2H. HOW DOES THE ELECTRONIC
LOCKING DIFFERENTIAL
WORK
You can activate the differential
electronically and shift it on the fly within
the operating speed range. The electronic
differential disengages when the vehicle
speed exceeds a set value, and reengages
when the vehicle speed goes below a set
value. See
Switching the Electronic
Locking Differential On and Off (page
303). It also engages based on certain
selected drive modes. See Selecting a
Drive Mode (page 373). The electronic
locking differential is for use in mud, rocks,
sand, or any off-road condition where you
need maximum traction.
Note: The electronic locking differential can
activate or deactivate automatically based
on speed, four-wheel drive mode, and drive
mode selection.
See Switching the
Electronic Locking Differential On and
Off
(page 303).
Note: The electronic locking differential is
for off-road use only and is not for use on
dry pavement. Using the electronic locking
differential on dry pavement results in
increased tire wear, noise and vibration.
ELECTRONIC LOCKING
DIFFERENTIAL PRECAUTIONS
Operating the Electronic Locking
Differential with a Spare or
Mismatched Tires
On vehicles with an electronic locking
differential, the size of the spare tire can
affect performance of the system. If there
is a significant difference between the two
rear tires, you may have limited electronic
locking differential functionality. If the
system has difficulty disengaging, release
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(If Equipped)

the accelerator pedal and turn the steering
wheel in the opposite direction when
rolling. We recommend engaging and
disengaging the electronic locking
differential at a stop when you mount a
spare on the rear axle.
SWITCHING THE ELECTRONIC
LOCKING DIFFERENTIAL ON
AND OFF - RAPTOR
The button to activate and deactivate the
electronic locking differential is in the
center of the drive mode rotary switch.
To manually activate or deactivate the
electronic locking differential, press the
electronic locking differential button.
Note:
The electronic locking differential can
activate or deactivate automatically based
on speed, four-wheel drive mode, and drive
mode selection. See Selecting a Drive
Mode (page 373).
Rear Electronic Locking Differential Engagement Speed and Availability Automatic Re-
Engagement Speed
Automatic Disen-
gagement Speed
Maximum Engage-
ment Speed
Drive Modes
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Normal (4A, 4H)
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Sport (4A, 4H)
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Slippery (4A, 4H)
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Tow/Haul (4A,4H)
No Speed Limit
No Speed Limit
No Speed Limit
Off-Road (4H) 1
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(If Equipped)E308146

Automatic Re-
Engagement Speed
Automatic Disen-
gagement Speed
Maximum Engage-
ment Speed
Drive Modes
No Speed Limit
No Speed Limit
No Speed Limit
Baja (4H)
No Speed Limit
No Speed Limit
No Speed Limit
Rock Crawl (4L) 1
1 Automatically engages when you select this drive mode. You have the ability to manually
override the automatic engagement by pressing the electronic locking differential button. Automatic Re-
Engagement Speed
Automatic Disen-
gagement Speed
Maximum Engage-
ment Speed
4WD Mode
No speed Limit
No speed Limit
No speed Limit
Four-Wheel Drive
Low (4L)
Note: The electronic locking differential
may not engage if you press your accelerator
pedal during an engagement attempt. A
message could display in the instrument
display guiding you to release the
accelerator pedal.
Note: If the electronic locking differential
has difficulty disengaging, release the
accelerator pedal and turn the steering
wheel in the opposite direction while rolling.
Note: The electronic locking differential is
for off-road use only and is not for use on
dry pavement. Using the electronic locking
differential on dry pavement results in
increased tire wear, noise and vibration.
SWITCHING THE ELECTRONIC
LOCKING DIFFERENTIAL ON
AND OFF - 4X4
The button to activate and deactivate the
electronic locking differential is in the
center of the drive mode rotary switch. 303
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To manually activate or deactivate the
electronic locking differential, press the
electronic locking differential button.
Note:
The electronic locking differential can
activate or deactivate automatically based
on speed, four-wheel drive mode, and drive
mode selection. See Selecting a Drive
Mode (page 373).
4X4 Rear Electronic Locking Differential Engagement Speed and Availability Automatic Re-
Engagement Speed
Automatic Disen-
gagement Speed
Maximum Engage-
ment Speed
Drive Modes
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Normal (2H, 4A 2
, 4H)
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Eco (2H, 4A 2
, 4H)
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Sport (2H, 4A 2
, 4H)
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Slippery (2H, 4A 2
,
4H)
No Speed Limit
No Speed Limit
No Speed Limit
Deep Snow/Sand
(4H, 4L) 1
No Speed Limit
No Speed Limit
No Speed Limit
Mud/Ruts (4H, 4L) 1
No Speed Limit
No Speed Limit
No Speed Limit
Rock Crawl (4L) 1
20 mph (30 km/h)
25 mph (41 km/h)
No Speed Limit
Tow/Haul Mode
1 Automatically engages when you select these drive modes. You have the ability to
manually override the automatic engagement by pressing the electronic locking differential
button.
2 If available for 4A drive modes.
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(If Equipped)E308146

Automatic Re-
Engagement Speed
Automatic Disen-
gagement Speed
Maximum Engage-
ment Speed
4WD Mode
No speed Limit
No speed Limit
No speed Limit
Four-Wheel Drive
Low (4L)
Note: The electronic locking differential
may not engage if you press your accelerator
pedal during an engagement attempt. A
message could display in the instrument
display guiding you to release the
accelerator pedal.
Note: If the electronic locking differential
has difficulty disengaging, release the
accelerator pedal and turn the steering
wheel in the opposite direction while rolling.
Note: The electronic locking differential is
for off-road use only and is not for use on
dry pavement. Using the electronic locking
differential on dry pavement results in
increased tire wear, noise and vibration.
SWITCHING THE ELECTRONIC
LOCKING DIFFERENTIAL ON
AND OFF - 4X2
The button to activate and deactivate the
electronic locking differential is located in
the center of the Drive mode rotary switch. To manually activate or deactivate the
electronic locking differential, press the
electronic locking differential button.
4X2 Rear Electronic Locking Differential Engagement Speed and Availability Automatic Re-Engagement
Speed
Automatic Disengagement
Speed
Maximum Engagement
Speed
20 mph (30 km/h)
25 mph (41 km/h)
20 mph (30 km/h)
Note: The electronic locking differential
may not engage if you press your accelerator
pedal during an engagement attempt. A
message could display in the instrument
display guiding you to release the
accelerator pedal. Note:
If the electronic locking differential
has difficulty disengaging, release the
accelerator pedal and turn the steering
wheel in the opposite direction while rolling.
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Note:
The electronic locking differential is
for off-road use only and is not for use on
dry pavement. Using the electronic locking
differential on dry pavement results in
increased tire wear, noise and vibration.
ELECTRONIC LOCKING
DIFFERENTIAL INDICATORS If both rear wheel axle shafts
lock together, the indicator in the
cluster is amber, providing
additional traction.
If you select the electronic locking
differential and the indicator in the cluster
is gray or turns from amber to gray while
driving, one of the following has occurred:
• The vehicle speed is too high.
• The accelerator pedal is too high during
an engagement attempt. •
The vehicle is experiencing an anti-lock
brake activation.
• The left and right wheel speed
difference is too high during an
engagement attempt.
If you select the electronic locking
differential and the indicator in the cluster
does not turn on, the following has
occurred:
• The system has malfunctioned and
accompanies a check locking
differential message in the information
display. See your dealer as soon as
possible.
Note: If the vehicle is experiencing an
anti-lock braking event, the electronic
locking differential could momentarily
disengage.
ELECTRONIC LOCKING DIFFERENTIAL – TROUBLESHOOTING
ELECTRONIC LOCKING DIFFERENTIAL – INFORMATION MESSAGES -
RAPTOR 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
Displays when the electronic locking differential is selected while in 2H.
Locking differential not
available in 2H
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