Page 459 of 660

TIRE PRESSURE MONITORING
SYSTEM LIMITATIONS
When the outside temperature dropssignificantly, the tire pressure could decreaseand activate the low tire pressure warninglamp.
The warning lamp could also illuminate whenyou use a spare wheel, or tire sealant fromthe inflator kit.
Note:Regularly checking the vehicle tirepressures can reduce the possibility for thewarning lamp to illuminate due to outsideair temperature changes.
Note:After you inflate the tires to therecommended pressure it could take up totwo minutes of driving over 20 mph (32 km/h)for the warning indicator to turn off.
VIEWING THE TIRE PRESSURES
Using the instrument cluster displayarrow keys navigate to the truck infosection where you can view the tirepressures.
TIRE PRESSURE MONITORING
SYSTEM – TROUBLESHOOTING
TIRE PRESSURE MONITORINGSYSTEM – WARNING LAMPS
The low tire pressure warning lamphas combined functions, as itwarns you when your tires needair, and when the system is no longercapable of functioning as intended.
455
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTire Pressure Monitoring SystemE224333 E139232
Page 460 of 660
Action RequiredPossible CauseWarning Lamp
After inflating your tires to the manufacturer’s recommendedpressure as shown on the tire label, on the edge of driver dooror the B-pillar, drive your vehicle for at least two minutes over20 mph (32 km/h) before the light turns off.
One or more tires are significantly underinflatedSolid warning lamp
Repair the damaged road wheel and tire and refit it to your vehicleto restore operation of the system.Temporary spare wheel in useSolid warning lamp or flashingwarning lamp
If the tires are inflated to the recommended tire pressures andthe temporary spare wheel is not in use, the system detected afault that requires service. Have your vehicle checked as soonas possible.
Tire pressure monitoring systemmalfunction
456
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTire Pressure Monitoring System
Page 461 of 660

TIRE PRESSURE MONITORING SYSTEM – INFORMATION MESSAGES
ActionMessage
After inflating your tires to the manufacturer’s recommended pressure as shown on the TireLabel, on the edge of the driver door or the B-Pillar, drive your vehicle for at least two minutesover 20 mph (32 km/h) before the light turns off.
Tire Pressure Low
The system has detected a fault that requires service. Have your vehicle checked as soon aspossible.Tire Pressure Monitor Fault
The system has detected a fault that requires service or a spare tire is in use. Have your vehiclechecked as soon as possible.Tire Pressure Sensor Fault
Trailer Tire Pressure Monitoring System
ActionMessage
One or more tires on your trailer is below the specified tire pressure.Trailer Tire Low Specified:
Displays when one or more tires on your trailer is above the recommendedtemperature.Trailer Tire Over Temperature
A trailer tire pressure sensor is malfunctioning. If the warning stays on or continuesto come on, contact an authorized dealer as soon as possible.Trailer Tire Pressure Sensor Fault
457
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTire Pressure Monitoring System
Page 463 of 660

CHANGING A FLAT TIRE
If you get a flat tire when driving, do notapply the brake heavily. nstead, graduallydecrease your speed, hold the steeringwheel firmly and slowly move to a safe placeon the side of the road.
Have the flat serviced by an authorizeddealer to prevent damage to the systemsensors. See Tire Pressure MonitoringSystem (page 453). Replace the spare tirewith a road tire as soon as possible. Duringrepairing or replacing of the flat tire, havethe authorized dealer inspect the systemsensor for damage.
Note:Only use tire sealants in roadsideemergencies as they may cause damage tothe tire pressure monitoring system sensor.
Note:The tire pressure monitoring systemindicator light illuminates when the sparetire is in use. To restore the full function ofthe monitoring system, all road wheels withtire pressure monitoring sensors must bemounted on this vehicle.
Dissimilar Spare Wheel and TireAssembly Information
WARNING: Failure to follow theseguidelines could result in an increased riskof loss of vehicle control, injury or death.
If you have a dissimilar spare wheel and tire,then it is intended for temporary use only.This means that if you need to use it, youshould replace it as soon as possible with aroad wheel and tire assembly that is thesame size and type as the road tires andwheels that were originally provided. If thedissimilar spare tire or wheel is damaged, itshould be replaced rather than repaired.
A dissimilar spare wheel and tire assemblyis defined as a spare wheel and tire assemblythat is different in brand, size or appearancefrom the other road tires and wheels on yourvehicle.
Full-size dissimilar spare
When driving with the full-size dissimilarspare wheel and tire assembly, do not:
•Exceed 70 mph (113 km/h).
•Use more than one dissimilar sparewheel and tire assembly at a time.
•Use snow chains on the end of thevehicle with the dissimilar spare wheeland tire assembly.
When driving with the full-size dissimilarspare wheel and tire assembly, it isrecommended that you do not:
•Exceed 50 mph (80 km/h) in four-wheeldrive.
•Engage four-wheel drive unless thevehicle is stationary.
•Use four-wheel drive on dry pavement.
Using a dissimilar spare wheel and tireassembly can compromise the effectivenessof the following:
•Handling, stability and brakingperformance.
•Comfort and noise.
•Ground clearance and parking at curbs.
•Winter weather driving capability.
459
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMChanging a Road Wheel
Page 464 of 660

•Wet weather driving capability.
•Four-wheel driving capability.
When driving with the full-size dissimilarspare wheel and tire assembly additionalcaution should be given to:
•Towing a trailer.
•Driving vehicles with a camper body.
•Driving vehicles with a load on the cargorack.
Drive cautiously when using a full-sizedissimilar spare wheel and tire assembly andseek service as soon as possible.
Location of the Spare Tire and Tools
The spare tire is located under the vehicle,just forward of the rear bumper. The jack,swivel wrench and lug wrench are in thefollowing locations:
LocationItem
Under the vehicle, just forward of the rear bumperSpare tire
Under the access panel located in the floor compartment behind therear seatJack and tool kit bag
Tire Change Procedure
WARNING: Only use replacementtires and wheels that are the same size,load index, speed rating, and type as thoseoriginally provided for your vehicle. Therecommended tire and wheel sizes can befound on the Tire Label on the driver side
door frame or the edge of the driver door.If this information is not found in thoselocations, or for additional options, contactyour authorized dealer. Use of any tire orwheel not recommended, could affect thesafety and performance of your vehicle,which could result in an increased risk ofloss of vehicle control, vehicle rollover,personal injury and death.
460
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMChanging a Road Wheel
Page 535 of 660
Check Every Month
The air filter restriction gauge.1
The engine oil level.
Function of all interior and the exterior lights.
The tires including the spare for wear and proper pressure.
The windshield washer fluid level.
The fuel and water separator. Drain if necessary or if indicated by the instrument cluster display.1
The holes and slots in the tail pipe to make sure they are functional and clear of debris.1
1 Diesel vehicles only.
Check Every Six Months
The battery connections. Clean if necessary.
The body and door drain holes for obstructions. Clean if necessary.
The cooling system fluid level and the coolant system strength.
The door weatherstrips for wear. Lubricate if necessary.
The hinges, latches and outside locks for proper operation. Lubricate if necessary.
531
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMScheduled Maintenance
Page 537 of 660

Multi-Point Inspection
Suspension components for leaks or damageExhaust system
Steering and linkageExterior lamps operation
Tires including the spare for wear and proper pressure2Fluid levels1; fill if necessary
Windshield for cracks, chips or pitsFor oil and fluid leaks
Washer spray and wiper operationHalfshaft dust boots
1 Brake, coolant recovery reservoir, automatic transmission and window washer.2If your vehicle has a temporary mobility kit, check the tire sealant expiration Use By date on the canister. Replace as needed.
Be sure to ask your dealership serviceadvisor or technician about the multi-pointvehicle inspection. It is a comprehensive wayto perform a thorough inspection of yourvehicle. Your checklist gives you immediatefeedback on the overall condition of yourvehicle.
NORMAL SCHEDULED
MAINTENANCE
Oil Change Reminder
Your vehicle comes with an oil changereminder that determines when you shouldchange the engine oil based on how you useyour vehicle.
Your vehicle lets you know when an oilchange is due by displaying a message inthe information display.
The following table provides examples ofvehicle use and its impact on oil changeintervals. It is a guideline only. Actual oilchange intervals depend on several factorsand generally decrease with severity of use.
533
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMScheduled Maintenance
Page 539 of 660

Normal Maintenance Intervals
At Every Oil Change Interval as Indicated by the Information Display 1
Change the engine oil and filter. 2
Rotate the tires, inspect tire wear and measure tread depth.
Perform a multi-point inspection - recommended.
Inspect the automatic transmission fluid level - vehicles with dipstick. Consult your dealer for requirements.
Inspect the brake pads, rotors, hoses and parking brake.
Inspect the engine cooling system strength and hoses.
Inspect the exhaust system and heat shields.
Inspect the front axle and U-joints.
Inspect the half-shaft boots.
Inspect the steering linkage, ball joints, suspension, tire-rod ends, driveshaft and U-joints.
Inspect the wheels and related components for abnormal noise, wear, looseness or drag.
1 Do not exceed one year or 10,000 mi (16,000 km) between service intervals.2 Reset the oil change reminder after engine oil and filter changes.
535
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMScheduled Maintenance