Lincoln Nautilus (2019 year). Manual - part 20

Protected Components

Fuse Rating

Fuse or Relay Number

Extended power module - power.

10A 

2

14

Smart datalink connector (SDLC) power (OBD connector).

10A 

2

15

Not used (spare).

15A 

1

16

Not used (spare).

5A 

2

17

Not used (spare).

5A 

2

18

Extended power module - Run/Start.

7.5A 

2

19

Headlamp control module.

7.5A 

2

20

Humidity sensor.

5A 

2

21

Not used (spare).

5A 

2

22

Delayed accessory (power inverter logic, moonroof logic,
driver window switch power).

10A 

1

23

Central lock/unlock.

20A 

1

24

Driver door (window, mirror).

30A 

1

25

Driver door module.

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Fuses

Protected Components

Fuse Rating

Fuse or Relay Number

Driver door lock indicator.
Driver lock switch illumination.

Front passenger door (window, mirror).

30A 

1

26

Front passenger door module.
Front passenger lock indicator.
Front passenger switch illumination (window, lock).

Moonroof.

30A 

1

27

Amplifier.

20A 

1

28

Rear driver side door smart window.

30A 

1

29

Rear passenger side door smart window.

30A 

1

30

Not used (spare).

15A 

1

31

Sync 3 module.

10A 

1

32

Radio transceiver module.

Radio.

20A 

1

33

Run-start bus (fuse 19, 20, 21, 22, 35, 36, 37, circuit breaker
38).

30A 

1

34

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Fuses

Protected Components

Fuse Rating

Fuse or Relay Number

Not used (spare).

5A 

1

35

Auto-dimming rear view mirror.

15A 

1

36

Automatic high beam and lane departure mirror module.
Rear heated seat module.
Suspension module.

Active front steering.

20A 

1

37

Heated steering wheel module.

Not used.

-

38

1 

Micro 2 fuse.

2 

Micro 3 fuse.

CHANGING A FUSE

Fuses

WARNING: Always replace a fuse

with one that has the specified amperage
rating. Using a fuse with a higher
amperage rating can cause severe wire
damage and could start a fire.

E217331

If electrical components in the vehicle are
not working, a fuse may have blown. Blown
fuses are identified by a broken wire within
the fuse. Check the appropriate fuses before
replacing any electrical components.

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Fuses

Fuse Types

E207206

Fuse Type

Callout

Micro 2

A

Micro 3

B

Maxi

C

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Fuses

Fuse Type

Callout

Mini

D

M Case

E

J Case

F

J Case Low Profile

G

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Fuses

GENERAL INFORMATION

Have your vehicle serviced regularly to help
maintain its roadworthiness and resale value.
There is a large network of authorized
dealers that are there to help you with their
professional servicing expertise. We believe
that their specially trained technicians are
best qualified to service your vehicle properly
and expertly. They are supported by a wide
range of highly specialized tools developed
specifically for servicing your vehicle.

If your vehicle requires professional service,
an authorized dealer can provide the
necessary parts and service.  Check your
warranty information to find out which parts
and services are covered.

Use only recommended fuels, lubricants,
fluids and service parts conforming to
specifications.  Motorcraft® parts are
designed and built to provide the best
performance in your vehicle.

Precautions

•

Do not work on a hot engine.

•

Make sure that nothing gets caught in
moving parts.

•

Do not work on a vehicle with the engine
running in an enclosed space, unless you
are sure you have enough ventilation.

•

Keep all open flames and other burning
material (such as cigarettes) away from
the battery and all fuel related parts.

Working with the Engine Off

1. Set the parking brake and shift the

transmission to park (P).

2. Switch off the engine.

3. Block the wheels.

Working with the Engine On

WARNING: To reduce the risk of

vehicle damage and personal burn injuries,
do not start your engine with the air
cleaner removed and do not remove it
while the engine is running.

1. Set the parking brake and shift the

transmission to park (P).

2. Block the wheels.

OPENING AND CLOSING THE
HOOD

Opening the Hood

E142457

1. Inside the vehicle, pull the hood release

handle located under the left-hand side
of the instrument panel.

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E267365

2. Slightly lift the hood.

3. Release the hood latch by pushing the

secondary release lever to your left-hand
side.

E202009

4

4. Open the hood.  The hood struts

automatically supports the hood.

Closing the Hood

1. Lower the hood until it engages on to the

secondary latch.

2. Firmly push down on the front of the

hood to close it fully.

Note: Make sure that the hood is correctly
closed.

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UNDER HOOD OVERVIEW - 2.0L

E294775

Engine coolant reservoir.  See Engine Coolant Check (page 323).

A

Engine oil dipstick. See Engine Oil Dipstick (page 321).

B

Engine oil filler cap.  See Engine Oil Check (page 321).

C

Brake fluid reservoir.  See Brake Fluid Check (page 328).

D

Battery. See Changing the 12V Battery (page 329).

E

Power distribution box. See Changing a Fuse (page 313).

F

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Air filter. See Changing the Engine Air Filter (page 334).

G

Windshield washer fluid reservoir. See Washer Fluid Check (page 329).

H

UNDER HOOD OVERVIEW - 2.7L

E273095

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Maintenance

Engine coolant reservoir.  See Engine Coolant Check (page 323).

A

Brake fluid reservoir.  See Brake Fluid Check (page 328).

B

Battery.  See Changing the 12V Battery (page 329).

C

Power distribution box.  See Fuses (page 297).

D

Air filter assembly.  See Changing the Engine Air Filter (page 335).

E

Engine oil dipstick.  See Engine Oil Dipstick (page 321).

F

Engine oil filler cap.  See Engine Oil Check (page 321).

G

Windshield washer fluid reservoir.  See Washer Fluid Check (page 329).

H

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Maintenance

ENGINE OIL DIPSTICK - 2.0L

E270482

Minimum.

A

Nominal.

B

Maximum.

C

ENGINE OIL DIPSTICK - 2.7L

E250320

Minimum.

A

Nominal.

B

Maximum.

C

ENGINE OIL CHECK

To check the engine oil level consistently
and accurately, do the following:

1. Make sure the parking brake is on. Make

sure the transmission is in park (P) or
neutral (N).

2. Run the engine until it reaches normal

operating temperature.

3. Make sure that your vehicle is on level

ground.

4. Switch the engine off and wait 15 minutes

for the oil to drain into the oil pan. 
Checking the engine oil level too soon
after you switch the engine off may result
in an inaccurate reading.

5. Open the hood.   See Opening and

Closing the Hood (page 316).

6. Remove the dipstick and wipe it with a

clean, lint-free cloth.   See Under Hood
Overview (page 319).

7. Reinstall the dipstick and remove it again

to check the oil level.   See Under Hood
Overview (page 319).

8. Make sure that the oil level is between

the maximum and minimum marks. If the
oil level is at the minimum mark, add oil
immediately.   See Capacities and
Specifications (page 400).

9. If the oil level is correct, replace the

dipstick and make sure it is fully seated.

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Maintenance

Note: Do not remove the dipstick when the
engine is running.

Note:  If the oil level is between the
maximum and minimum marks, the oil level
is acceptable.  Do not add oil.

Note: The oil consumption of new engines
reaches its normal level after approximately
3,000 mi (5,000 km).

Adding Engine Oil

WARNING: Do not remove the filler

cap when the engine is running.

Do not use supplemental engine oil additives
because they are unnecessary and could
lead to engine damage that may not be
covered by the vehicle Warranty.

E142732

Only use oils certified for gasoline engines
by the American Petroleum Institute (API). 
An oil with this trademark symbol conforms
to the current engine and emission system
protection standards and fuel economy
requirements of the International Lubricants
Specification Advisory Committee (ILSAC).

To top up the engine oil level do the
following:

1. Clean the area surrounding the engine

oil filler cap before you remove it.

2. Remove the engine oil filler cap.   See

Under Hood Overview (page 319).  Turn
it counterclockwise and remove it.

3. Add engine oil that meets our

specifications.   See Capacities and
Specifications (page 400).  You may have
to use a funnel to pour the engine oil into
the opening.

4. Recheck the oil level.

5. If the oil level is correct, replace the

dipstick and make sure it is fully seated.

6. Replace the engine oil filler cap.  Turn it

clockwise until you feel a strong
resistance.

Note:  Do not add oil further than the
maximum mark.  Oil levels above the
maximum mark may cause engine damage.

Note: Make sure you install the oil filler cap
correctly.

Note: Soak up any spillage with an
absorbent cloth immediately.

OIL CHANGE INDICATOR RESET

Use the information display controls on the
steering wheel to reset the oil change
indicator.

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Maintenance

From the main menu scroll to:

Action and description

Message

Press the right arrow button,
then from this menu scroll to
the following message.

Settings

Press the right arrow button,
then from this menu scroll to
the following message.

Vehicle

Press the right arrow button,
then from this menu scroll to
the following message.

Oil Life

Press and hold the OK button
until the instrument cluster
displays the following
message.

Hold OK to
Reset

Reset Successful

When the oil change indicator
resets the instrument cluster
displays 100%.

Remaining Life

{00}%

Action and description

Message

If the instrument cluster
displays one of the following
messages, repeat the
process.

Not Reset

Reset Cancelled

ENGINE COOLANT CHECK

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 put coolant in the

windshield washer reservoir. If sprayed on
the windshield, coolant could make it
difficult to see through the windshield.

WARNING: To reduce the risk of

personal injury, make sure the engine is
cool before unscrewing the coolant
pressure relief cap. The cooling system is
under pressure. Steam and hot liquid can
come out forcefully when you loosen the
cap slightly.

WARNING: Do not add coolant

further than the MAX mark.

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 524).

Note: Make sure that the coolant level is
between the MIN and MAX marks on the
coolant reservoir.

Note:  Coolant expands when it is hot.  The
level may extend beyond the MAX mark.

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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 add engine

coolant when the engine is hot. Failure to
follow this instruction could result in
personal 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.

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 388).  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 may not be
covered by 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 388).
Using water that has not been deionised
may contribute to deposit formation,
corrosion and plugging of the small cooling
system passageways.

Note:  Coolants marketed for all makes and
models may not be approved to our
specifications and may cause damage to
the cooling system.  Resulting component
damage may not be covered by the vehicle
Warranty.

If the coolant level is at or below the
minimum mark, add prediluted coolant
immediately.

To top up the coolant level do the following:

1. Unscrew the cap slowly. Any pressure

escapes as you unscrew the cap.

2. Add prediluted coolant approved to the

correct specification.  See Capacities and
Specifications (page 388).

3. Add enough prediluted coolant to reach

the correct level.

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4. Replace the coolant reservoir cap, turn

it clockwise until you feel a strong
resistance.

5. Check the coolant level in the coolant

reservoir the next few times you drive
your vehicle. If necessary, add enough
prediluted engine coolant to bring the
coolant level to the correct level.

If you have to add more than 1.1 qt (1 L) of
engine coolant per month, have your vehicle
checked as soon as possible. Operating an
engine with a low level of coolant can result
in engine overheating and possible engine
damage.

In case of emergency, you can add a large
amount of water without engine coolant in
order to reach a vehicle service location. In
this instance, qualified personnel:

1. Must drain the cooling system.

2. Chemically clean the coolant system.

3. Refill with engine coolant as soon as

possible.

Water alone, without engine coolant, can
cause engine damage from corrosion,
overheating or freezing.

Do not use the following as a coolant
substitute:
•

Alcohol.

•

Methanol.

•

Brine.

•

Any coolant mixed with alcohol or
methanol antifreeze.

Alcohol and other liquids can cause engine
damage from overheating or freezing.

Do not add extra inhibitors or additives to
the coolant. These can be harmful and
compromise the corrosion protection of the
coolant.

Recycled Coolant

We do not recommend the use of recycled
coolant as an approved recycling process is
not yet available.

Note: Dispose of used coolant in the
appropriate manner.

Follow your community's regulations and
standards for recycling and disposing of
automotive fluids.

Severe Climates

If you drive in extremely cold climates:
•

It may be necessary to increase the
coolant concentration above 50%.

•

A coolant concentration of 60% provides
improved freeze point protection. 
Coolant concentrations above 60%
decrease the overheat protection
characteristics of the coolant and may
cause engine damage.

If you drive in extremely hot climates:
•

You can decrease the coolant
concentration to 40%.

•

Coolant concentrations below 40%
decrease the freeze and corrosion
protection characteristics of the coolant
and may cause engine damage.

Vehicles driven year-round in non-extreme
climates should use prediluted coolant for
optimum cooling system and engine
protection.

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Coolant Change

At specific mileage intervals, as listed in the
scheduled maintenance information, the
coolant should be changed. Add prediluted
coolant approved to the correct specification.
See Capacities and Specifications (page
388).

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.

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