
The lane keeping aid warning lamp or redlane marking in your instrument clusterdisplay indicate blind spot assist activation.In addition, the blind spot information systemalert indicator flashes on the exterior mirroron the same side as the detection. See BlindSpot Information System (page 311).
BLIND SPOT ASSIST WITH TRAILER
COVERAGE
WHAT IS BLIND SPOT ASSIST WITHTRAILER COVERAGE
Blind spot assist with trailer coverage is anextension of the lane keeping system.
It may help you identify adjacent vehiclesduring a lane change.
Blind spot assist provides a blind spotwarning and steering assistance to helpduring lane changes.
When attaching a trailer, ensure you haveproperly set up the trailer coverage settings.See Blind Spot Information System WithTrailer Coverage (page 313).
HOW DOES BLIND SPOT ASSIST WITHTRAILER COVERAGE WORK
Activate and deactivate the systemusing the lane keeping systembutton on the steering wheel.
During lane changes, the design of the blindspot assist feature detects vehicles in, orapproaching, your blind spot and providesa warning, plus steering assistance to directyour vehicle back into your lane.
If a supported trailer is connected, thefunction is reduced to only detecting vehicleson both sides of your vehicle and trailer,extending rearward from the exterior mirrorsto the end of your trailer. See Blind SpotInformation System With Trailer Coverage(page 313).
When active, this system functions with orwithout the use of direction indicators andhazard flashers.
You must keep your hands on the steeringwheel at all times.
BLIND SPOT ASSIST WITH TRAILERCOVERAGE LIMITATIONS
All system limitations present in the basiclane keeping system also apply to blind spotassist.
Blind spot assist does not function under thefollowing conditions:
•The system does not detect lanemarkings.
•One or both rear radar sensors becomeblocked or faulty.
•You have not configured the attachedtrailer correctly in the trailer tow menusor you attached an unsupported trailer.The system only supports certain trailershapes and dimensions.
Note:Blind spot assist with trailer coveragecould have reduced performance if any ofthe above limitations are present.
Blind spot assist may have difficulty detectinghazards under the following conditions:
306
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMLane Keeping SystemE334922

If the sensors become blocked, a messageappears in the instrument cluster display.See Blind Spot Information System –Information Messages (page 316). The alertindicators illuminate but the system does notalert you.
BLIND SPOT INFORMATION SYSTEM
WITH TRAILER COVERAGE
WHAT IS BLIND SPOT INFORMATIONSYSTEM WITH TRAILER COVERAGE
Blind spot information system detectsvehicles that may have entered the blindspot zone. The detection area is on bothsides your vehicle and trailer, extendingrearward from the exterior mirrors to the endof your trailer.
BLIND SPOT INFORMATION SYSTEMWITH TRAILER COVERAGELIMITATIONS
Trailer coverage only supports conventionaltrailers. The system turns off if you select afifth wheel trailer type.
Make sure the trailer width is less than orequal to 8.5 ft (2.6 m) and the length is lessthan 33 ft (10.1 m). If you input values higher,the system turns off.
Some trailers could cause a slight change insystem performance:
•Large box trailers could cause false alertsto occur when driving next toinfrastructures or near parked cars. Afalse alert could also occur while makinga 90-degree turn.
•Trailers that have a width greater than8.5 ft (2.6 m) at the front and have a totallength greater than 20 ft (6 m) couldcause delayed alerts when a vehicle ispassing at high speeds.
•Box trailers that have a width greater than8.5 ft (2.6 m) at the front could causeearly alerts when you pass a vehicle.
•Clam shell or v-nose box trailers with awidth greater than 8.5 ft (2.6 m) at thefront could cause delayed alerts when avehicle traveling the same speed as yourvehicle merges lanes.
313
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMBlind Spot Information System (If Equipped)E225007

3.When you plug in a trailer with electric orelectric-over-hydraulic brakes, a messageconfirming connection appears in theinformation display.
4.Use the gain adjustment to find thedesired starting point. A gain setting of6.0 is a good starting point for heavierloads.
Note:Use the following steps to adjust thegain setting whenever road, weather andtrailer, or vehicle loading conditions, changefrom when you initially set the gain.
5.In a traffic-free environment, tow thetrailer on a dry, level surface and squeezethe manual control lever completely.
6.If the trailer wheels lock up, indicated bysquealing tires, reduce the gain setting.If the trailer wheels turn freely, increasethe gain setting. Repeat Steps 5 and 6until the gain setting is at a point justbelow trailer wheel lock-up. If towing aheavier trailer, trailer wheel lock-up maynot be attainable even with the maximumgain setting of 10.
Note:Only perform this procedure at speedsof approximately 20–25 mph (30–40 km/h).
Note:The trailer brake controller reducesoutput at vehicle speeds below 11 mph(18 km/h) so that trailer and vehicle brakingis not jerky or harsh. This feature is onlyavailable when applying the brakes usingyour vehicle's brake pedal, not the controller.
Note:Your vehicle's brake system and thetrailer brake system work independently ofeach other. Changing the gain setting on thecontroller does not affect the operation ofyour vehicle's brakes whether you attach atrailer or not.
Note:With the proper electrical connection,pressing your vehicle brake pedal or usingthe manual control lever illuminates bothtrailer and vehicle brake lamps.
Note:When you switch the engine off, thecontroller output is disabled and the displayand module shut down. The controllermodule and display turn on when you switchthe ignition on.
Adjusting the Trailer Brake Gain
Increase or decrease the amountof gain in set increments.A
Slide the control to engage thetrailer brakes.B
Note:Adjust gain setting before using thetrailer brake controller for the first time.
357
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMIntegrated Trailer Brake Controller (If Equipped)E333154

DescriptionMessage
Displays when you exceed the maximum controllable trailer angle forthe system. Place your vehicle in drive (D) and pull forward to get yourvehicle and trailer back to an in-line position, then activate the systemby selecting the connected trailer and following the instructions onthe touchscreen.If this message consistently displays, you may need to repeat thetrailer setup and calibration. Delete the trailer from the system andrepeat the setup and calibration process.
Stop now. Deactivated by trailer angle.
Displays when the system can no longer steer the vehicle and youmust take over steering.Pro Trailer Backup Assist™ Stop Now Take Control of Steering Wheel
These messages display when the system does not detect the trailer.Make sure the rear camera is clean, and the sticker is clearly visiblein the camera image. You can also move the trailer forward or back-ward to change the trailer position and lighting conditionsIf these messages continue to display, visit your authorized dealer tohave your vehicle checked.
Pro Trailer Backup Assist™ Trailer Not Detected. Shift to Park PressKnob to Exit
Pro Trailer Backup Assist™ Trailer Not Detected. Refer to Owner'sManual. Press Knob to Exit
370
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTrailer Backup Assistance (If Equipped)

TRAILER BACKUP ASSISTANCE –FREQUENTLY ASKED QUESTIONS
Why does the trailer not reverse straight?
Verify the sticker is correctly applied.Other factors such as the hitchconnection, road camber, road slopeand trailer suspension could influencehow straight the system can reverse thetrailer when the control knob is notturned. You can compensate for thetrailer drifting to the right or left byslowly turning the knob until the traileris following your desired path andholding the knob in that position. Checkthat the correct trailer is selected in thetouchscreen. Verify the sticker iscorrectly applied and check that thedrawbar and the trailer dimensions arewithin the allowed range. If the trailerconsistently does not reverse straight,delete the trailer from the system andrepeat the setup process to calibratethe trailer.
What does it mean if the system remainson one message for an extended timeduring calibration?
The camera could need to be cleaned,the sticker could be blocked, thedrawbar could be outside the allowedrange of 9–18 in (23–46 cm) or youcould need to move to a different areato change the lighting and background.Verify the sticker is in the properlocation. See Applying the TrailerReversing Aid Sticker (page 364). Youcan move to a different area or changethe direction you are driving or set upthe system at a different time of day.Some trailers are not compatible withthe sticker and camera system.
What does it mean if the system pausesduring calibration?
There could be steering input or trailermovement during the straight driveportion of the calibration process.
What does it mean if the system displayshold steering steady during turn?
Part of the calibration process for thesticker setup requires a steady turn. Ifyou are continually moving the steeringwheel during the turn, this delays thecalibration process. To enable thecalibration process, hold the steeringwheel at the same position whenturning.
What does it mean if the system displaysthat it is not available?
There could be a sub-system that thesystem uses that is not correctlyoperating or there could be a batteryvoltage issue. If the system continuesto display it is not available, visit yourauthorized dealer to have your vehiclechecked.
372
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTrailer Backup Assistance (If Equipped)

What does it mean if the trailer is at itsmaximum angle or the system deactivatedby trailer angle?
You are at the maximum controllabletrailer angle for the system. Place yourvehicle in drive (D) and pull forward toget the truck and trailer back to anin-line position. If this messageconsistently displays, this could indicatethe sticker is incorrectly applied, thetrailer needs to be recalibrated or thedrawbar or the trailer dimensions areoutside of the supported range. Thesystem is designed to work withdrawbars that have a license plate tohitch ball center measurement of 9–18 in(23–46 cm) when installed. The systemis designed to work with trailers thathave a hitch point to center of the axleor axles measurement of 6–33 ft(1.85–10.05 m). Do not attempt to usedrawbars or trailers that have a lengthoutside of this range as the systemperformance degrades and could causeimproper system function. Check thatthe correct trailer is selected on the
touchscreen. Verify the sticker iscorrectly applied and check that thedrawbar and the trailer dimensions arewithin the allowed range. Then, deletethe trailer from the system and repeatthe setup process to calibrate the trailer.
What does it mean when the system tellsyou to take control of the steering wheel?
The system is no longer steering thevehicle and you must take over steering.There are four reasons the system coulddisplay this message. The first reasonthe system could display this messageis that you have touched the steeringwheel when the system is steering. Thesecond reason the system could displaythis message is that you have exceededthe maximum speed for the feature. Thethird reason the system could displaythis message is that the trailer is notdetected. The final reason the systemcould display this message is that aninternal condition for system operationis not met that requires your vehicle toreturn to manual control of the steering.
What does it mean if the system does notdetect a trailer?
The system requires a clear view of thesticker placed on the trailer. You mustkeep the camera lens and sticker cleanfor the system to correctly operate. Ifthe system cannot initially detect thetrailer, it could be necessary for you tochange the lighting conditions bymoving your vehicle and trailer orwaiting until the conditions change. SeeApplying the Trailer Reversing AidSticker (page 364). Some trailers are notcompatible with the sticker and camerasystem.
Note:The system is designed to be usedwith the same trailer connection every timeyou choose the trailer from the touchscreen.When using a different drawbar or a differentpinhole on drawbars with more than one,connecting the drawbar to your vehicleaffects the trailer position and you may needto repeat the trailer setup and calibrationprocess.
374
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTrailer Backup Assistance (If Equipped)

TRAILER REVERSE GUIDANCE –FREQUENTLY ASKED QUESTIONS
What does it mean if the system remainson one message for an extended timeduring calibration?
The camera could need to be cleaned,the sticker could be blocked, thedrawbar could be outside the allowedrange of 9–18 in (23–46 cm) or youcould need to move to a different areato change the lighting and background.Verify the sticker is in the properlocation. See Applying the TrailerReverse Aid Sticker (page 376). You canmove to a different area or change thedirection you are driving or setup thesystem at a different time of day. Sometrailers are not compatible with thesticker and camera system.
What does it mean if the system pausesduring calibration?
There could be steering input or trailermovement during the straight driveportion of the calibration process.
What does it mean if the system displayshold steering steady during turn?
Part of the calibration process for thesticker setup requires a steady turn. Ifyou are continually moving the steeringwheel during the turn, this delays thecalibration process. To enable thecalibration process, hold the steeringwheel at the same position whenturning.
What does it mean if the system displaysthat it is not available?
There could be a sub-system that thesystem uses that is not correctlyoperating or there could be a batteryvoltage issue. If the system continuesto display it is not available, visit yourauthorized dealer to have your vehiclechecked.
What does it mean if the system displaysthat driving is required to initialize steering?
The steering system needs to learninternal parameters to fully turn on thefeature. Drive your vehicle straightforward above 25 mph (40 km/h) forapproximately 5 minutes. This could alsooccur when your vehicle is new, thereis a battery voltage issue or if thesteering system has been serviced.
What does it mean if the system does notdetect a trailer?
The system requires a clear view of thesticker placed on the trailer. You mustkeep the camera lens and sticker cleanfor the system to correctly operate. Ifthe system cannot initially detect thetrailer, it could be necessary for you tochange the lighting conditions bymoving your vehicle and trailer orwaiting until the conditions change. SeeApplying the Trailer Reverse AidSticker (page 376). Some trailers are notcompatible with the sticker and camerasystem.
382
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMTrailer Reverse Guidance (If Equipped)

DRIVING IN SPECIAL CONDITIONS
DRIVING THROUGH MUD AND WATER
Mud
Be cautious of sudden changes in vehiclespeed or direction when you are driving inmud. Even all-wheel drive and four-wheeldrive vehicles can lose traction in mud. Ifyour vehicle slides, steer in the direction ofthe slide until you regain control of yourvehicle. After driving through mud, clean offresidue stuck to rotating driveshafts and tires.Excess residue can cause an imbalance thatcould damage drive components.
Note:If your vehicle gets stuck in mud, itcould be rocked out by shifting betweenforward and reverse gears, stoppingbetween shifts in a steady pattern. Presslightly on the accelerator in each gear.
Note:Do not rock your vehicle if the engineis not at normal operating temperature, asdamage to the transmission could occur.
Note:Do not rock your vehicle for more thana minute, as damage to the transmissionand tires could occur or the engine couldoverheat.
Water
If you must drive though deep water, driveslowly. The water could limit traction or brakecapability. See Driving Through ShallowWater (page 386).
When driving though water, determine thedepth and avoid water higher than the centerof the wheel.
Once through water, always try the brakes.Wet brakes do not stop your vehicle asquickly as dry brakes. Apply light pressureto the brake pedal while slowly moving thevehicle to dry the brakes.
Note:Driving through deep water couldcause damage to the transmission. If thefront or rear axle is submerged in water,have the axle lubricant and power transferunit lubricant checked and changed ifnecessary.
DRIVING ON HILLY OR SLOPINGTERRAIN
WARNING: Extreme care should beused when steering the vehicle in reversedown a slope so as not to cause thevehicle to swerve out of control.
Although natural obstacles could make itnecessary to travel diagonally up or down ahill or steep incline, you should try to drivestraight up or straight down.
Note:Avoid turning on steep slopes or hills.A danger lies in losing traction, slippingsideways and possible vehicle roll over.Whenever driving on a hill, determinebeforehand the route you can use. Do notdrive over the crest of a hill without seeingwhat conditions are on the other side. Donot drive in reverse over a hill without theaid of an observer.
385
2023 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202207, DOMDriving Hints