service LINCOLN NAVIGATOR 2023 Owner's Manual

WHAT IS AUTO-START-STOP
The system is designed to help reduce fuelconsumption and CO2 emissions by stopping
the engine when it is idling, for example attraffic lights.
AUTO-START-STOP PRECAUTIONS
WARNING: Apply the parking brake,shift into park (P), switch the ignition offand remove the key before you leave yourvehicle. Failure to follow this instructioncould result in personal injury or death.
WARNING: Apply the parking brake,shift into park (P), switch the ignition offand remove the key before you open thehood or have any service or repair workcompleted. If you do not switch the ignitionoff, the engine could restart at any time.Failure to follow this instruction could resultin personal injury or death.
SWITCHING AUTO-START-STOP
ON AND OFF
The system turns on when you switch theignition on.
Press the button to switch thesystem off.
Note:OFF illuminates in the switch.
Note:Deactivating the system using thebutton lasts only one key cycle.
Press the button again to switch the systemback on.
Note: The system turns off if it detects amalfunction. If the system malfunctions,have your vehicle checked as soon aspossible.
STOPPING THE ENGINE
Stop your vehicle, keep your foot on thebrake pedal and the transmission in drive(D).
RESTARTING THE ENGINE
Release the brake pedal or press theaccelerator pedal.
A message appears in the instrument clusterdisplay if the system requires you to takeaction.
AUTO-START-STOP INDICATORS
WARNING: The system may requirethe engine to automatically restart whenthe auto-start-stop indicator illuminatesgreen or flashes amber. Failure to followthis instruction could result in personalinjury.
The Auto-Start-Stop indicatorilluminates green when the enginestops. It flashes amber and amessage appears when you need to takeaction.
208
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMAuto-Start-Stop (If Equipped)E121377 E121377

WHAT IS THE CATALYTIC
CONVERTER
The catalytic converter is part of yourvehicle's emissions system and filters harmfulpollutants from the exhaust gas.
CATALYTIC CONVERTER
PRECAUTIONS
WARNING: Do not park, idle or driveyour vehicle on dry grass or other dryground cover. The emission system heatsup the engine compartment and exhaustsystem, creating the risk of fire.
WARNING: The normal operatingtemperature of the exhaust system is veryhigh. Never work around or attempt torepair any part of the exhaust system untilit has cooled. Use special care whenworking around the catalytic converter.The catalytic converter heats up to a veryhigh temperature after only a short periodof engine operation and stays hot after theengine is switched off.
WARNING: Exhaust leaks may resultin entry of harmful and potentially lethalfumes into the passenger compartment. Ifyou smell exhaust fumes inside yourvehicle, have your vehicle inspectedimmediately. Do not drive if you smellexhaust fumes.
To avoid damaging the catalytic converter:
•Do not crank the engine for more than10 seconds at a time.
•Do not run the engine with a spark pluglead disconnected.
•Do not push-start or tow-start yourvehicle. Use booster cables. See JumpStarting the Vehicle (page 391).
•Use the correct fuel. See Fuel andRefueling (page 211).
•Do not switch the ignition off when yourvehicle is moving.
•Avoid running out of fuel.
•Have the items listed in scheduledmaintenance information performedaccording to the specified schedule.
Note:Do not make any unauthorizedchanges to your vehicle or engine. By law,vehicle owners and anyone whomanufactures, repairs, or services a fleet ofvehicles are not permitted to intentionallyremove an emission control device orprevent it from working.
218
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMCatalytic Converter

Note:When a system fault is present, thesystem can typically remain in whichevermode was selected prior to the faultcondition occurring. It does not default totwo-wheel drive in all circumstances. Whenthis warning is displayed, have your vehicleserviced by an authorized dealer.
FOUR-WHEEL DRIVE – INFORMATION MESSAGES
ActionMessage
A four-wheel drive system fault is present. Have your vehicle checkedas soon as possible.Check 4x4
The four-wheel drive system is making a shift.4x4 Shift in Progress
Displays when you attempt to switch to four-wheel drive low modeand you do not shift the transmission to neutral (N).For 4x4 LOW Shift to N
Displays when you attempt to switch to four-wheel drive low modeand 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 modeand you do not shift the transmission to neutral (N).To Exit 4x4 LOW Shift to N
Displays when you attempt to switch from four-wheel drive low modeand 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
228
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMFour-Wheel Drive (If Equipped)

WHAT IS THE ELECTRONIC
LIMITED-SLIP DIFFERENTIAL
The electronic limited-slip differential systemdirects torque across the axle, enabling thevehicle to drive over terrain and roadconditions that a conventional axle cannot.The system is active at all times and requiresno input from the driver.
Note:If your vehicle is not at optimaloperating conditions or a system fault ispresent, a warning may display in theinstrument cluster. Depending on thewarning, you may need to service yourvehicle.
Operating the Electronic Limited-SlipDifferential with a Spare or MismatchedTires
If your vehicle has an electronic limited-slipdifferential, do not use a spare tire of adifferent size than the tire provided. If youhave a spare tire installed, a message mayappear indicating the system has disabledautomatically or reduced function to preventsystem overheat and damage. Werecommend you reinstall the repaired orreplaced spare tire as soon as possible.When you replace the spare tire, the systemresumes normal operation on the next keycycle.
Trailer Towing
The electronic limited-slip differentialenhances vehicle stability during trailer towoperation. During high demand traileringevents, such as steep slopes, high speedsor with a spare tire, the system may providea warning in the instrument cluster andreduce function or enter a temporarilydisabled state. To resume normal function,stop the vehicle in a safe location and allowthe unit to adequately cool. Once the systemreaches normal operating temperatures,system function restores and the electroniclimited-slip differential restored messagedisplays.
230
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMElectronic Limited-Slip Differential (If Equipped)

ELECTRONIC LIMITED-SLIP DIFFERENTIAL – TROUBLESHOOTING
ELECTRONIC LIMITED-SLIP DIFFERENTIAL – INFORMATION MESSAGES
Description and ActionMessage
Displays when the system requires service. Have your vehicle checked as soon as possible.Check Electronic Limited Slip Differential
Displays when the system requires service. Have your vehicle checked as soon as possible.Electronic Limited Slip Differential Off SeeOwner's Manual
Displays when the electronic limited slip differential system resumes normal function.Electronic Limited Slip Differential Restoredto Normal
Displays if the electronic limited slip differential system temporarily turns off due to overheatingor an undersized spare tire. If you have an undersized spare tire installed, replace the spare tirewith a full-sized tire as soon as possible. If not, stop the vehicle in a safe location and allow thesystem to cool.
Electronic Limited Slip DifferentialTemporarily Disabled
Displays if the electronic limited slip differential has limited functionality. This could be due toan undersized spare tire or caused by the system overheating. If you have an undersized sparetire installed, replace the spare tire with a full-sized tire as soon as possible. If you do not havean undersized spare tire installed, the vehicle has reduced functionality. Have your vehiclechecked as soon as possible.
Electronic Limited Slip Differential ReducedTorque
231
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMElectronic Limited-Slip Differential (If Equipped)

5.Release the switch and pull away in anormal manner.
AUTOMATICALLY RELEASING THE
ELECTRIC PARKING BRAKE
1.Close the driver door.
2.Shift into gear.
3.Press the accelerator pedal and pull awayin a normal manner.
ELECTRIC PARKING BRAKE
AUDIBLE WARNING
Sounds when the parking brake is on andyour vehicle is moving. If the warning tonecontinues after you have released theparking brake, this indicates a malfunction.Have your vehicle checked as soon aspossible.
RELEASING THE ELECTRIC
PARKING BRAKE IF THE VEHICLE
BATTERY HAS RUN OUT OF
CHARGE
WARNING: The electric parkingbrake does not operate if the vehiclebattery has run out of charge.
Connect a booster battery to the vehiclebattery to release the electric parking brakeif the vehicle battery has run out of charge.See Jump Starting the Vehicle (page 391).
ELECTRIC PARKING BRAKE –
TROUBLESHOOTING
ELECTRIC PARKING BRAKE –WARNING LAMPS
Brake System
It illuminates red when you applythe parking brake and your vehicleis on. If the lamp flashes when theparking brake has been released,this indicates the parking brakesystem requires service. Have your vehiclechecked as soon as possible.
Note:Lamps may vary depending on region.
Electric Parking Brake
When the lamp illuminates yellow,it indicates a malfunction in theelectric parking brake. Have yourvehicle checked as soon as possible.
Note:Lamps may vary depending on region.
236
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMElectric Parking BrakeE270480 E67024 E67024 E146190

ELECTRIC PARKING BRAKE – INFORMATION MESSAGES
ActionMessage
The electric parking brake is set and a manual release is attempted without the brakepedal being pressed.To Release: Press Brake and Switch
The electric parking brake is set and an automatic release is attempted but cannot beperformed. 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 the electric parking brake before continuing to drive.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 to allow brakeservice. Have the system checked as soon as possible.Brake maintenance mode
The electric parking brake system has detected a condition that requires service. Somefunctionality may still be available. Have the system checked as soon as possible.Park Brake Limited Function Service Required
The electric parking brake system has detected a condition that requires service. Havethe system checked as soon as possible.Park Brake Malfunction Service Now
237
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMElectric Parking Brake

REVERSE BRAKING ASSIST –FREQUENTLY ASKED QUESTIONS
Why is reverse braking assist unavailable?
•Make sure the reverse braking assist ison. See Switching Reverse BrakingAssist On and Off (page 239).
•Make sure that all doors, liftgate ortailgate and hood are closed. Drive thevehicle on a straight road for a shortperiod. If the message remains, have thesystem checked.
•If your vehicle has the cross traffic alertsystem, make sure it is on. See SwitchingCross Traffic Alert On and Off (page 318).
•Make sure the rear parking aid system ison. See Parking Aids (page 255).
•Make sure the traction control is on. SeeSwitching Traction Control On and Off(page 245).
Note:The traction control automatically turnsoff if four-wheel drive low and certain drivemodes such as mud/ruts and snow/sand isactivated.
•Your vehicle may have sustained a rearend impact. Have the sensors checkedfor proper coverage and operation.
•An anti-lock brake, traction control orstability control event may have occurred.Reverse braking assist resumesoperation when the event is complete.
•Make sure the rear view camera and 360degree camera are not dirty orobstructed. If dirty, clean the camera. Ifthe message still appears after cleaningthe camera, wait a short time for themessage to clear. If the message doesnot clear, have the system checked.
•Make sure the cross traffic alert, rearparking aid and side parking aid sensorsare not blocked or faulty. See Locatingthe Cross Traffic Alert Sensors (page318). See Locating the Rear Parking AidSensors (page 256). See Locating theSide Parking Aid Sensors (page 259).
•You recently had your vehicle serviced,or the battery disconnected. Drive yourvehicle a short distance to resumesystem operation.
•Reverse braking assist does not functionwhen you connect a trailer. Operationresumes when you disconnect the trailer.
Note:If the answers to why the system isunavailable do not assist in returning reversebraking assist to available, have the systemchecked as soon as possible.
241
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMReverse Braking Assist (If Equipped)

TRACTION CONTROL – TROUBLESHOOTING
TRACTION CONTROL – INFORMATION MESSAGES
ActionMessage
The system detects a condition that requires service. Have the system checked as soon aspossible.Service AdvanceTrac
The status of the traction control system after you switch it off.Traction Control Off
The status of the traction control system after you switch it on.Traction Control On
246
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTraction Control

STEERING – INFORMATION MESSAGES
ActionMessage
The power steering system has detected a condition that requiresservice. Have your vehicle checked as soon as possible.Steering Fault Service Now
The power steering system is not working. Stop your vehicle in a safeplace. Have your vehicle checked as soon as possible.Steering Loss Stop Safely
The power steering system has detected a condition that requiresservice. Have your vehicle checked as soon as possible.Steering Assist Fault Service Required
The steering system has detected a condition that requires service. Have your vehicle checked as soon as possible.Steering Lock Malfunction Service Now
253
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMSteering