Page 271 of 649
System Settings
The system has optional menu settingsavailable. See General Information (page119). The system stores the last knownselection for each of these settings. You donot need to readjust your settings each timeyou switch the system on.
Adjust the settings to enable one of the threemodes:
Alert Only
Alert Only — Provides a steering wheelvibration when the system detects anunintended lane departure.
Aid Only
Aid Only — Provides steering assistancetoward the lane center.
Alert and Aid Mode
AlertA
AidB
Alert + Aid — Provides steering assistancetoward the lane center.
If your vehicle continues drifting out of thelane, the system provides a steering wheelvibration.
Note:The alert and aid diagrams illustrategeneral zone coverage. They do not provideexact zone parameters.
268
Navigator (TB9) Canada/United States of America, enUSA, Edition date: 201708, Third-Printing-
Driving AidsE165515 E165516 E165517
Page 305 of 649

Use the supplied measurement card, a tapemeasure and pen to carefully mark the areawhere to attach the sticker (supplied in theback cover pocket of your quick start guide).Make sure the whole sticker is within thezone between the two arcs or distancemarkers on the diagram, and is also visiblein the rear view camera display.
Step 4: Take Measurements
After you correctly place the sticker on thetrailer, you must take some keymeasurements.
Note:You must take accuratemeasurements for the system to operateproperly.
Note:When rounding in inches, roundupward if the measured length is a quarterinch or greater. Round downward if themeasured length is less than a quarter inch.For example 12.25 in (31.11 cm) would berounded up to 12.50 in (31.75 cm). 12.13 in(30.8 cm) would be rounded down to 12.00 in(30.48 cm).
Note:When rounding in centimeters, roundto the nearest whole centimeter. If themeasurement is less than 0.2 in (0.5 cm)round downward. If the measurement ismore than or equal to 0.2 in (0.5 cm) roundupward. For example, 11.9 in (30.3 cm) wouldbe rounded down to 11.8 in (30 cm). 12.0 in(30.5 cm) would be rounded up to 12.2 in(31 cm).
Note:Use consistent metric or imperial unitsas required by your country or vehicle.
Record the four key distances (A, B, C, D) asrequired by the measurement card. Recordthe trailer name for these measurements.Distance A
The horizontal distance from the bumper tothe center of the ball hitch on the trailer.
Distance B
The horizontal distance from the center ofthe ball hitch to the center of the sticker.
Distance C
The distance from the rear view camera tothe center of the sticker.
302
Navigator (TB9) Canada/United States of America, enUSA, Edition date: 201708, Third-Printing-
TowingE247545
Page 411 of 649

Note:Your vehicle may be equippedwith a dissimilar spare wheel and tireassembly. A dissimilar spare wheel andtire assembly is defined as a sparewheel and tire assembly that is differentin brand, size or appearance from theroad tires and wheels. If you have adissimilar spare wheel and tire assemblyit is intended for temporary use only andshould not be used in a tire rotation.
Note:After having your tires rotated,inflation pressure must be checked andadjusted to the vehicle requirements.
Rotating your tires at the recommendedinterval (as indicated in the ScheduledMaintenance chapter) will help your tireswear more evenly, providing better tireperformance and longer tire life.
Rear-wheel drive vehicles andfour-wheel drive vehicles (front tires atleft of diagram)
Sometimes irregular tire wear can becorrected by rotating the tires.
USING SNOW CHAINS
WARNING: Snow tires must be thesame size, load index and speed rating asthose originally provided by Ford. Use ofany tire or wheel not recommended byFord can affect the safety and performanceof your vehicle, which could result in anincreased risk of loss of control, vehiclerollover, personal injury and death.Additionally, the use of non-recommended
tires and wheels can cause steering,suspension, axle, transfer case or powertransfer unit failure. Follow the Fordrecommended tire inflation pressure foundon the Safety Compliance CertificationLabel (on the door hinge pillar, door latchpost or the door edge that meets the doorlatch post, next to the driver seat), or TireLabel on the B-Pillar or the edge of thedriver door. Failure to follow the tirepressure recommendations can causeuneven treadwear patterns and adverselyaffect the way your vehicle handles.
Note:The suspension insulation andbumpers will help prevent vehicle damage.Do not remove these components from yourvehicle when using snow tires and chains.
The tires on your vehicle have all-weathertreads to provide traction in rain and snow.However, in some climates, you may needto use snow tires and cables. If you need touse cables, it is recommended that steelwheels (of the same size and specifications)be used, as cables may chip aluminumwheels.
408
Navigator (TB9) Canada/United States of America, enUSA, Edition date: 201708, Third-Printing-
Wheels and TiresE142548