engine LINCOLN NAUTILUS 2021 Service Manual

Manually Shifting in Drive (D)
Use this feature when you need immediate
shift response, for example overtaking
another vehicle.
•
Pull the (+) paddle to switch the feature
on.
• Hold the plus paddle to switch the
feature off.
Note: This feature will turn off if paddles are
not used continuously while driving.
Manually Shifting in Sport (S) (If Equipped)
• Pull the (+) paddle to switch the feature
on.
• Hold the (+) paddle to switch the feature
off. Using SelectShift •
Pull the right paddle (+) to upshift.
• Pull the left paddle (-) to downshift.
The instrument cluster displays the current
gear.
Note: Your transmission could downshift or
upshift if you fully press the accelerator
pedal.
Note: Your transmission will downshift at low
engine speed, to prevent the engine from
stalling.
Note: This feature will not function if the
engine speed after a shift exceeds the
overspeed limiter. The current gear will flash
if a shift is not allowed. Note:
Engine damage can occur if you hold
high engine speed without shifting.
TEMPORARY NEUTRAL MODE
What Is Temporary Neutral Mode
This mode keeps your vehicle in neutral (N)
when you switch your vehicle off. Use this
mode if you exit your vehicle or switch your
vehicle off at an automatic car wash.
Note: Do not tow your vehicle in this mode.
Note: Automatic return to park (P) is delayed
when your vehicle is in this mode. See What
Is Automatic Return to Park (P)
(page 209).
Temporary Neutral Mode Limitations
Your vehicle could shift to park (P) after 30
minutes, or when the vehicle battery charge
level is low. Prolonged use of this mode can
cause the vehicle battery to run out of
charge.
208
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Automatic TransmissionE144821

Do not tow your vehicle in this mode. Failure
to follow these instructions could result in
vehicle damage not covered by the vehicle
warranty.
Entering Temporary Neutral Mode
1. Power your vehicle on.
2. Bring your vehicle to a complete stop.
3. Press and hold the brake pedal.
4. Shift into neutral (N).
Note:
An instructional message appears.
5. Press the neutral (N) button.
Note: A confirmation message appears
when your vehicle enters the mode.
6. Release the brake pedal.
Note: Your vehicle is free to roll.
7. Switch your vehicle off.
Note: Do not tow your vehicle in this mode.
Note: The neutral (N) indicator on the
transmission selector may flash in this mode. Exiting Temporary Neutral Mode
1. Press the brake pedal.
2. Shift into park (P), or power your vehicle
on and shift into drive (D) or reverse (R).
AUTOMATIC RETURN TO PARK (P)
What Is Automatic Return to Park (P)
Your vehicle shifts into park (P) if you attempt
to exit your vehicle without the transmission
in park (P).
How Does Automatic Return to Park
(P) Work
Your vehicle shifts into park (P) when your
vehicle is stationary and any of the following
occur:
• You switch the vehicle off.
• You open the driver door with your
seatbelt unlatched.
• You unlatch the driver seatbelt when the
driver door is open. Note:
Do not use automatic return to park
(P) when your vehicle is moving, except in
an emergency. See Stopping the Engine
When Your Vehicle is Moving (page 189).
Automatic Return to Park (P)
Limitations
Automatic return to park may not work if the
door ajar switch is malfunctioning.
See an authorized dealer if any of the
following occur:
• Door ajar indicator does not illuminate
with the driver door open.
• Door ajar indicator illuminates with the
driver door closed.
• Transmission not in park message
appears with the driver door closed, after
you shift out of park (P).
209
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Automatic Transmission

6.
With your foot fully applied on the brake
pedal, start your vehicle. Confirm that
your vehicle is in the park (P) position and
that the instrument cluster indicates park
(P).
7. If the instrument cluster is not displaying
the park (P) position or there is a
message stating Park Not Available,
Transmission Not In Park or Shift System
Fault, apply the parking brake before
exiting your vehicle. Have the system
checked.
AUTOMATIC TRANSMISSION
AUDIBLE WARNINGS
Transmission Not In Park (P) Audible
Warning
Sounds if you open the driver door before
shifting into park (P).
Park (P) Selection Audible Warning
Sounds when you shift into park (P). AUTOMATIC TRANSMISSION –
TROUBLESHOOTING
Automatic Transmission – Information
Messages You switched the
engine off and shift
select lever is in any position other than park (P).
Shift to Park
Transmission is toocold. Wait for it to
warm up before you drive.
Transmission
Warming Up Please Wait
The transmission isoverheating and
needs to cool. Stop in a safe place as
soon as it’ s possible.
Transmission Over
Temperature Stop Safely
Have system
checked as soon as possible.
Transmission
Service Required The transmission is
overheating and
needs to cool. Stop in a safe place as
soon as it’ s possible.
Transmission Too
Hot Press Brake
The transmission has
limited functionality. Have system
checked as soon as possible.
Transmission Limited
Function See Manual
A reminder to shift
into park. In addition, this message is
typical after recon- necting or rechar-
ging the battery until you cycle the igni-
tion to the on mode. See Changing the
12V Battery (page
345).
Transmission Not in
Park
212
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Automatic Transmission

Avoid abrupt steering, acceleration and
braking changes. Abrupt changes could
increase the risk of vehicle roll over, loss of
vehicle control and personal injury. Use all
available road surfaces to bring your vehicle
under control.
In the event of an emergency stop, avoid
skidding and do not attempt any sharp
steering wheel movements.
Driving In Sand
When driving over sand, try to keep all four
wheels on the most solid area of the trail.
Shift to a lower gear and drive steadily
through the terrain. Apply the accelerator
slowly and avoid excessive wheel slip. Do
not drive your vehicle in deep sand for an
extended period of time. This will cause the
system to overheat. A message appears in
the information display. See All-Wheel Drive
– Information Messages (page 217).
Note: If your vehicle gets stuck in sand, it
may be rocked out by shifting between
forward and reverse gears, stopping
between shifts in a steady pattern. Press
lightly on the accelerator in each gear. Note:
Do not rock your vehicle if the engine
is not at normal operating temperature, as
damage to the transmission may occur.
Note: Do not rock your vehicle for more than
a minute, as damage to the transmission
and tires may occur or the engine may
overheat.
Driving Through Mud and Water
Mud
Be cautious of sudden changes in vehicle
speed or direction when you are driving in
mud. Even all-wheel drive vehicles can lose
traction in mud. If your vehicle does slide,
steer in the direction of the slide until you
regain control of your vehicle.
After driving through mud, clean off residue
stuck to rotating driveshafts and tires. Excess
mud stuck on tires and rotating driveshafts
can cause an imbalance that could damage
drive components. Note:
If your vehicle gets stuck in mud, it
may be rocked out by shifting between
forward and reverse gears, stopping
between shifts in a steady pattern. Press
lightly on the accelerator in each gear.
Note: Do not rock your vehicle if the engine
is not at normal operating temperature, as
damage to the transmission may occur.
Note: Do not rock your vehicle for more than
a minute, as damage to the transmission
and tires may occur or the engine may
overheat.
Water
If you must drive through deep water, drive
slowly. The water could limit traction or brake
capability. See Driving Through Water (page
305
).
When driving through water, determine the
depth and avoid water higher than the center
of the wheel.
215
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing All-Wheel Drive
(If Equipped)

Once through water, always try the brakes.
Wet brakes will not stop your vehicle as
quickly as dry brakes. Apply light pressure
to the brake pedal while slowly moving the
vehicle to dry the brakes.
Note:
Driving through deep water could
cause damage to the transmission. If the
front or rear axle is submerged in water, the
axle lubricant and power transfer unit
lubricant should be checked and changed
if necessary.
Driving on Hilly or Sloping Terrain
Although natural obstacles could make it
necessary to travel diagonally up or down a
hill or steep incline, you should try to drive
straight up or straight down.
Note: Avoid turning on steep slopes or hills.
A danger lies in losing traction, slipping
sideways and possible vehicle roll over.
Whenever driving on a hill, determine
beforehand the route you can use. Do not
drive over the crest of a hill without seeing
what conditions are on the other side. Do
not drive in reverse over a hill without the
aid of an observer. Apply just enough power to the wheels to
climb the hill. Too much power will cause the
tires to slip, spin or lose traction, and you
could lose control of your vehicle.
When descending a steep hill, do not
descend the hill in neutral. Avoid sudden
hard braking to keep the front wheels rolling
and to maintain your vehicle's steering.
Note:
If your vehicle has anti-lock brakes,
apply the brakes steadily. Do not pump the
brakes.
Note: If your vehicle gets stuck driving on
hilly or sloping terrain, it may be rocked out
by shifting between forward and reverse
gears, stopping between shifts in a steady
pattern. Press lightly on the accelerator in
each gear.
Note: Do not rock your vehicle if the engine
is not at normal operating temperature, as
damage to the transmission may occur.
Note: Do not rock your vehicle for more than
a minute, as damage to the transmission
and tires may occur or the engine may
overheat. 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.
Avoid sudden applications of power and
quick changes of direction on snow and ice.
Apply the accelerator slowly and steadily
when starting from a full stop.
Avoid sudden braking. Although an all-wheel
drive vehicle accelerates better than a
two-wheel drive vehicle in snow and ice, it
cannot stop any faster as braking occurs at
all four wheels. Do not become
overconfident of the road conditions.
216
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing All-Wheel Drive
(If Equipped)

Make sure that you allow sufficient distance
between your vehicle and other vehicles for
stopping. On ice and snow, you should drive
more slowly than usual. In emergency
stopping situations, steadily apply the brake.
Your vehicle has a four wheel anti-lock brake
system, do not pump the brake pedal. See
Anti-Lock Braking System Limitations (page
218
).
Note: If your vehicle gets stuck driving on
snow and ice, it may be rocked out by
shifting between forward and reverse gears,
stopping between shifts in a steady pattern.
Press lightly on the accelerator in each gear. Note:
Do not rock your vehicle if the engine
is not at normal operating temperature, as
damage to the transmission may occur.
Note: Do not rock your vehicle for more than
a minute, as damage to the transmission
and tires may occur or the engine may
overheat.
ALL-WHEEL DRIVE – TROUBLESHOOTING
All-Wheel Drive – Information Messages Action
Message
The all-wheel drive system temporarily turns off to protect itself from \
overheating.
AWD Temporarily Disabled
The all-wheel drive system will resume normal function and clear this me\
ssage after driving ashort distance with the road tire re-installed or after the system cools\
.
AWD Restored
The all-wheel drive system temporarily turns off to protect itself from \
overheating or if you are using the temporary spare tire.
AWD OFF
The all-wheel drive system is not operating properly. If the warning stays on or continues tocome on, contact an authorized dealer.
AWD Malfunction Service Required
217
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing All-Wheel Drive
(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 driving from a car wash or
standing water to dry the brakes. 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 could travel further.
Maintain pressure on the brake pedal.
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 334).
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.
218
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Brakes

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. WARNING:
The electric parking
brake does not operate if the vehicle
battery has run out of charge. The electronic parking brake
switch is on the center console. 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 power is off.
Note: The electric parking brake could apply
when you shift into park (P).
See Park (P)
(page 206).
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.
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.
221
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Electric Parking BrakeE267156

Electric Parking Brake – Information Messages
Park Brake
Action
Message
The parking brake is set, the engine is running and you drive your vehicle more than 3 mph
(5 km/h). If the warning stays on after the parking brake is released, contact an authorized dealer as soon as possible.
Park Brake Engaged
The electric parking brake is set and a manual release is attempted without the brake pedal being pressed.
To Release: Press Brake and Switch
The electric parking brake is set and an automatic release 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 speed exceeds 3 mph (5 km/h)
. Release park
brake before continued 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 a special mode that is used to allow serviceof the rear brakes. Contact an authorized dealer.
Park Brake Maintenance Mode
The electric park brake system has detected a condition that requires service. Some functionalitymay still be available. Contact your authorized dealer.
Park Brake Limited Function Service
Required
The electric parking brake system has detected a condition that requires service. Contact your authorized dealer.
Park Brake Malfunction Service Now
223
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Electric Parking Brake

WHAT IS HILL START ASSIST
Hill Start Assist makes it easier for you to pull
away when your vehicle is on a slope without
using the parking brake.
HOW DOES HILL START ASSIST
WORK
When the system activates, your vehicle
remains stationary for a few seconds after
you release the brake pedal. This gives you
time to move your foot from the brake pedal
to the accelerator pedal. The brakes release
when the engine has developed sufficient
torque to prevent your vehicle from rolling
down the slope.
HILL START ASSIST PRECAUTIONS
WARNING: The system does not
replace the parking brake. When you leave
your vehicle, always apply the parking
brake. WARNING: You must remain in your
vehicle when the system turns on. At all
times, you are responsible for controlling
your vehicle, supervising the system and
intervening, if required. Failure to take care
may result in the loss of control of your
vehicle, serious personal injury or death. WARNING:
The system turns off if
there is a malfunction or if you excessively
rev the engine.
HILL START ASSIST –
TROUBLESHOOTING
Hill Start Assist – Information
Messages Action
Message
Displays when
system is not avail- able. Have your
vehicle checked as soon as possible.
Hill Start Assist Not
Available
225
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Hill Start Assist