2021 LINCOLN NAUTILUS cooling

Exterior Mirrors
Adjusting the Exterior Mirrors
...................133
Folding the Exterior Mirrors - Vehicles With: Manual Folding Mirrors ................
133
Folding the Exterior Mirrors - Vehicles With: Power Folding Mirrors ..................
133
Auto-Dimming Exterior Mirror ...................
134
Moonroof
Opening and Closing the Sun Shade ......
135
Opening and Closing the Moonroof .......
135
Venting the Moonroof .................................
136
Moonroof Bounce-Back .............................
136
Instrument Cluster
Instrument Cluster Overview .....................
137
What Is the Tachometer .............................
138
What Is the Speedometer ..........................
138
Fuel Gauge ....................................................
138
What Is the Engine Coolant Temperature Gauge .........................................................
139
What Is the Engine Oil Pressure Gauge .......................................................................
139 What Is the Transmission Fluid
Temperature Gauge ................................
139
What Is the 12V Battery Gauge .................
139
What Are the Instrument Cluster Warning Lamps ..........................................................
139
Instrument Cluster Warning Lamps .........
139
What Are the Instrument Cluster Indicators ........................................................................\
141
Instrument Cluster Indicators .....................
141
Instrument Cluster Display
Using the Instrument Cluster Display Controls ......................................................
143
Instrument Cluster Display Main Menu .......................................................................
144
Trip Computer ...............................................
145
Customizing the Instrument Cluster Display .......................................................................
147
Personalized Settings .................................
148
Remote Start
What Is Remote Start ....................................
151
Remote Start Precautions ...........................
151
Remote Start Limitations .............................
151Enabling Remote Start
.................................
151
Remotely Starting and Stopping the Vehicle .........................................................
151
Extending the Remote Start Duration .......................................................................
152
Remote Start Remote Control Indicators .......................................................................
152
Remote Start Settings .................................
152
Climate Control
Identifying the Climate Control Unit ........
154
Switching Climate Control On and Off .......................................................................
154
Switching Recirculated Air On and Off .......................................................................
154
Switching Air Conditioning On and Off .......................................................................
154
Switching Maximum Defrost On and Off .......................................................................
154
Switching Maximum Cooling On and Off .......................................................................
154
Switching the Heated Rear Window On and Off ........................................................
155
Switching the Heated Mirrors On and Off .......................................................................
155
4
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Table of Contents

Using the Tire Sealant and Inflator Kit
......................................................................379
Tire Pressure Monitoring System
What Is the Tire Pressure Monitoring System .......................................................
385
Tire Pressure Monitoring System Overview ......................................................................
385
Tire Pressure Monitoring System Precautions ..............................................
386
Tire Pressure Monitoring System Limitations .................................................
387
Viewing the Tire Pressures .......................
387
Resetting Tire Pressure Monitoring System ......................................................................
387
Tire Pressure Monitoring System – Troubleshooting ......................................
388
Changing a Road Wheel
Changing a Flat Tire ....................................
391
Wheel Nuts ...................................................
396
Capacities and Specifications
Engine Specifications - 2.0L .....................
398Engine Specifications - 2.7L
.....................
399
Motorcraft Parts - 2.0L ...............................
400
Motorcraft Parts - 2.7L .................................
401
Engine Oil Capacity and Specification - 2.0L .............................................................
402
Engine Oil Capacity and Specification - 2.7L .............................................................
404
Cooling System Capacity and Specification - 2.0L ..........................................................
407
Cooling System Capacity and Specification - 2.7L ...........................................................
408
Fuel Tank Capacity .....................................
409
Air Conditioning System Capacity and Specification - 2.0L ..................................
410
Air Conditioning System Capacity and Specification - 2.7L ..................................
412
Washer Fluid Specification ........................
413
Brake Fluid Specification ...........................
414
Vehicle Identification
Vehicle Identification Number ..................
416
Connected Vehicle
What Is a Connected Vehicle ....................
417Connected Vehicle Requirements
...........
417
Connected Vehicle Limitations .................
417
Connecting the Vehicle to a Mobile Network ......................................................
417
Connecting the Vehicle to a Wi-Fi Network .......................................................................
417
Connected Vehicle – Troubleshooting .......................................................................
418
Vehicle Wi-Fi Hotspot
Creating a Vehicle Wi-Fi Hotspot .............
421
Changing the Vehicle Wi-Fi Hotspot Name or Password ...............................................
421
Audio System
Audio System Precautions ........................
423
Switching the Audio Unit On and Off ......
423
Selecting the Audio Source .....................
423
Playing or Pausing the Audio Source .....
423
Adjusting the Volume .................................
423
Switching Shuffle Mode On and Off ......
424
Switching Repeat Mode On and Off ......
424
Setting a Memory Preset ...........................
424
Muting the Audio .........................................
424
12
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Table of Contents

IDENTIFYING THE CLIMATE
CONTROL UNIT
Depending on your vehicle options, the
controls could look different than what you
see here.
SWITCHING CLIMATE CONTROL
ON AND OFF
Press the button. SWITCHING RECIRCULATED AIR
ON AND OFF Press the button to recirculate air
currently in the passenger
compartment.
Note: Recirculated air could turn off or be
prevented from turning on in all air flow
modes except maximum cooling to reduce
the risk of the windows fogging up.
Note: Recirculated air could turn on and off
when you direct air to the instrument panel
or footwell air vents during hot weather to
improve cooling efficiency.
SWITCHING AIR CONDITIONING
ON AND OFF Press the button.
Note: Under certain conditions, the air
conditioning compressor could continue to
operate after you switch air conditioning off. SWITCHING MAXIMUM DEFROST
ON AND OFF Press the button.
Note: When you switch maximum defrost on,
the heated windshield, heated rear window
and air conditioning turn on. The blower
motor is set to the highest speed.
Note: When you switch maximum defrost off,
the heated windshield and heated rear
window remain on.
SWITCHING MAXIMUM COOLING
ON AND OFF Press the button.
Note: When you switch maximum cooling
off, air conditioning remains on.
154
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Climate ControlE287616

CLIMATE CONTROL –
TROUBLESHOOTING
Climate Control – Frequently Asked
Questions
Why is the volume of air to the rear
passenger compartment limited ?
Objects may obstruct the air direction
to the rear passenger compartment.
Make sure objects have not been
placed under the front seats.
Why is the volume of air from the air vents
reduced? The air intake area at the base of the
windshield could be obstructed. Make
sure the air intake area is free from any
snow, ice or leaves.
What are the recommended settings for
heating the interior? Auto mode on and instrument panel and
side air vents fully open. How can I quickly heat the interior?
Select the highest blower motor speed,
highest temperature and direct the air
to the footwell air vents.
What are the recommended settings for
cooling the interior? Auto mode on.
How can I quickly cool the interior? Switch maximum cooling on, switch
recirculated air on and drive with the
windows open until you feel cold air
through the air vents.
How can I reduce the humidity build-up
inside my vehicle? Do not drive with the system off or with
recirculated air on.
How can I defog the side windows? Switch maximum defrost on.
How can I defog or clear the windshield of
thin ice? Switch maximum defrost on. Why do I feel air from the footwell air vents
regardless of the air distribution?
This is normal operation. You may feel
a small amount of air from the footwell
air vents regardless of the air
distribution.
What happens if I switch auto mode on
when the outside temperature and
in-vehicle temperature is high? The system temporarily selects
recirculated air to maximize cooling.
What happens if I switch auto mode on
when the outside temperature is low and
the engine is cold? Air is directed to the windshield and the
outer instrument panel air vents.
157
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Climate Control

•
Check your hitch, electrical connections
and trailer wheel lug nuts thoroughly after
you have traveled 50 mi (80 km).
• When stopped in congested or heavy
traffic during hot weather, place the
transmission in park (P) to aid engine and
transmission cooling and to help A/C
performance.
• Turn off the speed control with heavy
loads or in hilly terrain. The speed control
may turn off when you are towing on
long, steep slopes.
• Shift to a lower gear when driving down
a long or steep hill. Do not continuously
apply the brakes, as they may overheat
and become less effective.
• If your transmission has Grade Assist or
Tow/Haul, use this feature when towing.
This provides engine braking and helps
eliminate excessive transmission shifting
for optimum fuel economy and
transmission cooling. •
If your vehicle has AdvanceTrac with roll
stability control, this system may turn on
during typical cornering maneuvers with
a heavily loaded trailer. This is normal.
Turning the corner at a slower speed
when towing may reduce this tendency.
• If you are frequently towing a trailer in
hot weather, hilly conditions, at the gross
combined weight rating or any
combination of these factors, consider
refilling your rear axle with synthetic gear
lubricant if the axle is not already filled
with it.
• Allow more distance for stopping with a
trailer attached. Anticipate stops and
gradually brake.
• Avoid parking on a slope. However, if
you must park on a slope, turn the
steering wheel to point your vehicle tires
away from traffic flow, set the parking
brake, place the transmission in park (P)
and place wheel chocks in front and back
of the trailer wheels.
Note: Chocks are not included with your
vehicle. LAUNCHING OR RETRIEVING A
BOAT OR PERSONAL
WATERCRAFT
When backing down a ramp during boat
launching or retrieval:
•
Do not allow the static water level to rise
above the bottom edge of the rear
bumper.
• Do not allow waves to break higher than
6 in (15 cm)
above the bottom edge of
the rear bumper.
Exceeding
6 in (15 cm) could allow water to
enter vehicle components, causing internal
damage to the components and affecting
driveability, emissions and reliability.
Note: Replace the rear axle lubricant
anytime the rear axle has been submerged
in water.
Note: Disconnect the trailer wiring connector
before backing the trailer into the water.
Note: Reconnect the trailer wiring connector
after removing the trailer from the water.
301
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Towing a Trailer

REDUCED ENGINE PERFORMANCE
WARNING: If you continue to drive
your vehicle when the engine is
overheating, the engine could stop without
warning. Failure to follow this instruction
could result in the loss of control of your
vehicle.
If the engine coolant temperature gauge
needle moves to the upper limit position, the
engine is overheating.
See What Is the
Engine Coolant Temperature Gauge (page
139).
You must only drive your vehicle for a short
distance if the engine overheats. The
distance you can travel depends on ambient
temperature, vehicle load and terrain. The
engine continues to operate with limited
power for a short period of time.
If the engine temperature continues to rise,
the fuel supply to the engine reduces. The
air conditioning switches off and the engine
cooling fan operates continually. 1. Gradually reduce your speed and stop
your vehicle as soon as it is safe to do
so.
2. Immediately switch the engine off to prevent severe engine damage.
3. Wait for the engine to cool down.
4. Check the coolant level.
See Checking
the Coolant (page 340).
5. Have your vehicle checked as soon as possible.
COLD WEATHER PRECAUTIONS
The functional operation of some
components and systems can be affected at
temperatures below approximately
-13°F
(-25°C).
BREAKING-IN
You need to break in new tires for
approximately
300 mi (480 km). During this
time, your vehicle may exhibit some unusual
driving characteristics. DRIVING THROUGH WATER WARNING:
Do not drive through
flowing or deep water as you may lose
control of your vehicle.
Note: Driving through standing water can
cause vehicle damage.
Note: Engine damage can occur if water
enters the air filter.
Before driving through standing water, check
the depth. Never drive through water that is
higher than the bottom of the front rocker
area of your vehicle.
305
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Driving Hints

CHECKING THE COOLANT
When the engine is cold, check the
concentration and level of the coolant at the
intervals listed in the scheduled maintenance
information. See Scheduled Maintenance
(page 459).
Note: Make sure that the coolant level is
between the minimum and maximum marks
on the coolant reservoir.
Note: Coolant expands when it is hot. The
level may extend beyond the
MAX mark.
If the coolant level is at or below the
minimum mark, add prediluted coolant
immediately.
Maintain coolant concentration within 48%
to 50%, which equates to a freeze point
between
-29°F (-34°C) and -35°F (-37°C).
Coolant concentration should be checked
using a refractometer. We do not recommend
the use of hydrometers or coolant test strips
for measuring coolant concentration. Adding Coolant WARNING:
Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap with
a thick cloth to prevent the possibility of
scalding and slowly remove the cap.
Failure to follow this instruction could result
in personal injury. WARNING:
Do not add engine
coolant when the engine is on or the
cooling system is hot. Failure to follow this
instruction could result in personal injury. WARNING:
Do not add coolant
further than the MAX mark. WARNING: Do not put coolant in the
windshield washer reservoir. If sprayed on
the windshield, coolant could make it
difficult to see through the windshield. Note:
Do not use stop leak pellets, cooling
system sealants, or non-specified additives
as they can cause damage to the engine
cooling or heating systems. Resulting
component damage may not be covered by
the vehicle Warranty.
Note: Automotive fluids are not
interchangeable.
It is very important to use prediluted coolant
approved to the correct specification in order
to avoid plugging the small passageways in
the engine cooling system.
See Capacities
and Specifications (page 407). Do not mix
different colors or types of coolant in your
vehicle. Mixing of engine coolants or using
an incorrect coolant may harm the engine or
cooling system components and could void
the vehicle Warranty.
Note: If prediluted coolant is not available,
use the approved concentrated coolant
diluting it to 50/50 with distilled water.
See
Capacities and Specifications (page 407).
Using water that has not been deionized
may contribute to deposit formation,
corrosion and plugging of the small cooling
system passageways.
340
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance

Fail-Safe Cooling
Fail-safe cooling allows you to temporarily
drive your vehicle before any incremental
component damage occurs. The fail-safe
distance depends on ambient temperature,
vehicle load and terrain.
How Fail-Safe Cooling Works
If the engine begins to overheat,
the coolant temperature gauge
moves toward the red zone:
A warning lamp illuminates and a
message may appear in the
information display.
If the engine reaches a preset
over-temperature condition, the engine
automatically switches to alternating cylinder
operation. Each disabled cylinder acts as an
air pump and cools the engine.
When this occurs, your vehicle still operates,
however:
• Engine power is limited.
• The air conditioning system turns off. Continued operation increases the engine
temperature, causing the engine to
completely shut down. Your steering and
braking effort increases in this situation.
When the engine temperature cools, you can
re-start the engine. Have your vehicle
checked as soon as possible to minimize
engine damage.
When Fail-Safe Mode Is Activated
WARNING: Fail-safe mode is for use
during emergencies only. Operate your
vehicle in fail-safe mode only as long as
necessary to bring your vehicle to rest in
a safe location and seek immediate repairs.
When in fail-safe mode, your vehicle will
have limited power, will not be able to
maintain high-speed operation, and may
completely shut down without warning,
potentially losing engine power, power
steering assist, and power brake assist,
which may increase the possibility of a
crash resulting in serious injury. WARNING: Do not remove the
coolant reservoir cap when the engine is
on or the cooling system is hot. Wait 10
minutes for the cooling system to cool
down. Cover the coolant reservoir cap with
a thick cloth to prevent the possibility of
scalding and slowly remove the cap.
Failure to follow this instruction could result
in personal injury.
Your vehicle has limited engine power when
in the fail-safe mode, drive your vehicle with
caution. Your vehicle does not maintain
high-speed operation and the engine could
operate poorly.
Remember that the engine is capable of
automatically shutting down to prevent
engine damage. In this situation:
1. Pull off the road as soon as safely possible and switch the engine off.
2. If you are a member of a roadside assistance program, we recommend that
you contact your roadside assistance
service provider.
342
2021 Nautilus (CD9) Canada/United States of America, enUSA, Edition date: 202011, First-Printing Maintenance