2023 LINCOLN AVIATOR maintenance

After battery replacement, or in some cases
after charging the battery with an external
charger, the battery management system
requires eight hours of vehicle sleep time to
relearn the battery state of charge. During
this time, your vehicle must remain fully
locked with the ignition switched off.
Note:Prior to relearning the battery state of
charge, the battery management system
may temporarily disable some electrical
systems.
Electrical Accessory Installation
To make sure the battery management
system works correctly, do not connect an
electrical device ground connection directly
to the battery negative post. This can cause
inaccurate measurements of the battery
condition and potential incorrect system
operation.
Note:If you add electrical accessories or
components to the vehicle, it may adversely
affect battery performance and durability.
This may also affect the performance of
other electrical systems in the vehicle.Remove and Reinstall the Battery
Install a battery approved for use by our
specifications. See Capacities and
Specifications (page 460).
To disconnect or remove the battery, do the
following:
1. Apply the parking brake and switch the
ignition off.
2. Switch all electrical equipment off, for
example lights and radio.
3. Wait a minimum of two minutes before
disconnecting the battery.
Note:The engine management system has
a power hold function and remains powered
for a period of time after you switch the
ignition off. This is to allow the system to
store diagnostic and adaptive tables.
Disconnecting the battery without waiting
can cause damage not covered by the
vehicle warranty.
4. Disconnect the negative battery cable
terminal.
5. Disconnect the positive battery cable
terminal.6. Remove the battery securing clamp.
7. Remove the battery.
8. To install, reverse the removal procedure.
Note:Before reconnecting the battery, make
sure the ignition remains switched off.
Note:Make sure to fully tighten the battery
cables.
If you disconnect or replace the vehicle
battery, you must reset the following
features:
• Window bounce-back. See Power
Windows (page 121).
• Clock Settings.
• Pre-set radio stations.
Battery Disposal
E107998
Make sure that you dispose of old
batteries in an environmentally
friendly way. Seek advice from
your local authority about recycling old
batteries.
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Maintenance

CHANGING THE 12V BATTERY -
PLUG-IN HYBRID ELECTRIC
VEHICLE (PHEV)
WARNING: Batteries normally
produce explosive gases which can cause
personal injury. Therefore, do not allow
flames, sparks or lighted substances to
come near the battery. When working near
the battery, always shield your face and
protect your eyes. Always provide correct
ventilation.
WARNING: When lifting a
plastic-cased battery, excessive pressure
on the end walls could cause acid to flow
through the vent caps, resulting in personal
injury and damage to the vehicle or battery.
Lift the battery with a battery carrier or with
your hands on opposite corners.
WARNING: Keep batteries out of
reach of children. Batteries contain sulfuric
acid. Avoid contact with skin, eyes or
clothing. Shield your eyes when working
near the battery to protect against possible
splashing of acid solution. In case of acid
contact with skin or eyes, flush immediately
with water for a minimum of 15 minutes and
get prompt medical attention. If acid is
swallowed, call a physician immediately.
WARNING: Battery posts, terminals
and related accessories contain lead and
lead compounds, chemicals known to the
State of California to cause cancer and
reproductive harm. Wash your hands after
handling.
WARNING: This vehicle may have
more than one battery. Removing the
battery cables from only one battery does
not disconnect your vehicle electrical
system. Make sure you disconnect the
battery cables from all batteries when
disconnecting power. Failure to do so may
cause serious personal injury or property
damage.
WARNING: For vehicles with
Auto-Start-Stop the battery requirement is
different. You must replace the battery with
one of exactly the same specification.
The primary battery is in the engine
compartment. See Under Hood Overview
(page 400).
The secondary battery is located behind the
trim panel in the luggage compartment.
413
Maintenance

39E371794
Your vehicle has a maintenance-free battery.
It does not require additional water during
service.If the vehicle battery has a cover and vent
hose, make sure you correctly install it after
cleaning or replacing the battery.
For longer, trouble-free operation, keep the
top of the battery clean and dry and the
battery cables tightly fastened to the battery
terminals. If any corrosion is present on the
battery or terminals, remove the cables from
the terminals and clean with a wire brush.
You can neutralize the acid with a solution
of baking soda and water.
We recommend that you disconnect the
negative battery cable terminal from the
battery if you plan to store your vehicle for
an extended period.
Note:If you only disconnect the negative
battery cable terminal, make sure it is
isolated or placed away from the battery
terminal to avoid unintended connection or
arcing.
If you replace the battery make sure it
matches the electrical requirements of your
vehicle.If you disconnect or replace the battery and
your vehicle has an automatic transmission,
it must relearn its adaptive strategy. Because
of this, the transmission may shift firmly when
first driven. This is normal operation while
the transmission fully updates its operation
to optimum shift feel.
Battery Sensor Reset
When you install a new battery, reset the
battery sensor by doing the following:
1. Switch the ignition on, and leave the
engine off.
Note:Complete Steps 2 and 3 within 10
seconds.
2. Flash the high beam headlamps five
times, ending with the high beams off.
3. Press and release the brake pedal three
times.
The battery warning lamp flashes three times
to confirm that the reset is successful.
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Maintenance

Battery Management System (If Equipped)
The system monitors battery conditions and
takes actions to extend battery life. If
excessive battery drain is detected, the
system temporarily disables some electrical
systems to protect the battery.
Systems included are:
• Heated rear window.
• Heated seats.
• Climate control.
• Heated steering wheel.
• Audio unit.
• Navigation system.
A message may appear in the information
display to alert you that battery protection
actions are active. This message is only for
notification that an action is taking place, and
not intended to indicate an electrical problem
or that the battery requires replacement.After battery replacement, or in some cases
after charging the battery with an external
charger, the battery management system
requires eight hours of vehicle sleep time to
relearn the battery state of charge. During
this time, your vehicle must remain fully
locked with the ignition switched off.
Note:Prior to relearning the battery state of
charge, the battery management system
may temporarily disable some electrical
systems.
Electrical Accessory Installation
To make sure the battery management
system works correctly, do not connect an
electrical device ground connection directly
to the battery negative post. This can cause
inaccurate measurements of the battery
condition and potential incorrect system
operation.
Note:If you add electrical accessories or
components to the vehicle, it may adversely
affect battery performance and durability.
This may also affect the performance of
other electrical systems in the vehicle.
Remove and Reinstall the Battery
Install a battery approved for use by our
specifications. See Capacities and
Specifications (page 460).
To disconnect or remove the battery, do the
following:
1. Apply the parking brake and switch the
ignition off.
2. Switch all electrical equipment off, for
example lights and radio.
3. Wait a minimum of two minutes before
disconnecting the battery.
Note:The engine management system has
a power hold function and remains powered
for a period of time after you switch the
ignition off. This is to allow the system to
store diagnostic and adaptive tables.
Disconnecting the battery without waiting
can cause damage not covered by the
vehicle warranty.
4. Disconnect the negative battery cable
terminal.
5. Disconnect the positive battery cable
terminal.
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Maintenance

6. Remove the battery securing clamp.
7. Remove the battery.
8. To install, reverse the removal procedure.
Note:Before reconnecting the battery, make
sure the ignition remains switched off.
Note:Make sure to fully tighten the battery
cables.
If you disconnect or replace the vehicle
battery, you must reset the following
features:
• Window bounce-back. See Power
Windows (page 121).
• Clock Settings.
• Pre-set radio stations.
Battery Disposal
E107998
Make sure that you dispose of old
batteries in an environmentally
friendly way. Seek advice from
your local authority about recycling old
batteries.
ADJUSTING THE HEADLAMPS
Vertical Aim Adjustment
If your vehicle has been involved in a crash,
have the aim of the headlamp beam checked
by an authorized dealer.
E142592
8 ft (2.4 m). A
Ground to the center of the
headlamp high beam bulb. B
25 ft (7.6 m). C
Horizontal reference line. DVertical Aim Adjustment Procedure
1. Park your vehicle on level ground
approximately 25 ft (7.6 m) from a wall or
screen.
2. Measure the distance from the ground
to the center of the headlamp high beam
bulb and mark an 8 ft (2.4 m) long
horizontal reference line on the wall or
screen at this height.
Note:There may be an identifying mark on
the lens to help you locate the center line of
the headlamp high beam bulb.
Note:To see a clearer light pattern for
adjusting, you may want to block the light
from one headlamp while adjusting the
other.
3. Switch on the low beam headlamps and
open the hood.
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Maintenance

E142465
4. On the wall or screen you will observe a
flat zone of high intensity light located at
the top of the beam pattern. If the top
edge of the flat zone of high intensity
light is not on the horizontal reference
line, adjust the aim of the headlamp
beam.
E292163
5. Use a suitable tool, for example a
screwdriver or socket wrench, to turn the
adjuster clockwise or counterclockwise
to adjust the vertical aim of the
headlamp. The horizontal edge of the
brighter light should touch the horizontal
reference line.6. Close the hood and switch off the lamps.
WASHER FLUID CHECK
WARNING: If you operate your
vehicle in temperatures below 41.0°F (5°C),
use washer fluid with antifreeze protection.
Failure to use washer fluid with antifreeze
protection in cold weather could result in
impaired windshield vision and increase
the risk of injury or accident.
Note:The front and rear washer systems
are supplied from the same reservoir.
Add fluid to fill the reservoir if the level is low.
Only use a washer fluid that meets our
specifications. See Capacities and
Specifications (page 460).
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Maintenance

State or local regulations on volatile organic
compounds may restrict the use of methanol,
a common windshield washer antifreeze
additive. Washer fluids containing
non-methanol antifreeze agents should be
used only if they provide cold weather
protection without damaging the vehicle’s
paint finish, wiper blades or washer system.
FUEL FILTER
Your vehicle is equipped with a lifetime fuel
filter that is integrated with the fuel tank.
Regular maintenance or replacement is not
needed.
CHECKING THE WIPER BLADES
E142463
Run the tip of your fingers over the edge of
the blade to check for roughness.
Clean the wiper blades with washer fluid or
water applied with a soft sponge or cloth.
CHANGING THE FRONT WIPER
BLADES - VEHICLES WITHOUT:
HEATED WIPER BLADES
You can improve poor wiper quality by
cleaning the wiper blades and the
windshield.
Replace the wiper blades at least annually
for optimum performance.
Removing the Front Wiper Blades
E292280
1. Lift the wiper blade from the windshield
by holding the middle of the retainer.
Note:Do not hold the wiper blade to lift the
wiper arm.
2. Rotate the blade toward the windshield
by gripping it under the connector until
a “click” sound is heard and the wiper
blade position is fixed.
3. Push the blade release button on top of
the connector and pull the blade from
the arm.
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Maintenance

Note:Make sure that the wiper arm does
not spring back against the glass when the
wiper blade is not attached.
Installing the Front Wiper Blades
1. Line up the wiper blade, water and
electrical connectors with the receptors
on the wiper arm by lifting the arm from
the windshield.
2. Slide the blade into the connector until
a “click” sound is heard.
3. Rotate the blade toward the wiper arm
by gripping it under the connector until
a “click” sound is heard. Verify that the
blade has rotation.
Note:Make sure that the wiper blade locks
into place.
CHANGING THE FRONT WIPER
BLADES - VEHICLES WITH:
HEATED WIPER BLADES
Replacing the Rubber Insert
E292277
1. Remove the wiper blade.2. Use a suitable tool, for example a
screwdriver, to carefully move the tab on
the end cap.
3. Pull the end cap to release the rubber
insert
4. To install, reverse the removal procedure.
CHANGING THE REAR WIPER
BLADES
You can improve poor wiper quality by
cleaning the wiper blades and the
windshield.
Replace the wiper blades at least annually
for optimum performance.
419
Maintenance