2016 FORD EXPEDITION EL sensor

PRINCIPLE OF OPERATION
WARNINGS
To help avoid personal injury, pleaseread and understand the limitationsof the system as contained in thissection. Sensing is only an aid for some(generally large and fixed) objects whenmoving on a flat surface at parking speeds.Certain objects with surfaces that absorbultrasonic waves, surrounding vehicle'sparking aid systems, traffic controlsystems, fluorescent lamps, inclementweather, air brakes, and external motorsand fans may also affect the function ofthe sensing system; this may includereduced performance or a false activation.
To help avoid personal injury, alwaysuse caution when in reverse (R) andwhen using the sensing system.
This system is not designed toprevent contact with small or movingobjects. The system is designed toprovide a warning to assist the driver indetecting large stationary objects to avoiddamaging your vehicle. The system maynot detect smaller objects, particularlythose close to the ground.
Certain add-on devices such as largetrailer hitches, bike or surfboard racksand any device that may block thenormal detection zone of the system, maycreate false beeps.
Note:Keep the sensors, located on thebumper or fascia, free from snow, ice andlarge accumulations of dirt. If the sensorsare covered, the system’s accuracy can beaffected. Do not clean the sensors withsharp objects.
Note:If your vehicle sustains damage tothe bumper or fascia, leaving it misalignedor bent, the sensing zone may be alteredcausing inaccurate measurement ofobstacles or false alarms.
Note:The sensing system cannot be turnedoff when a MyKey is present. See Principleof Operation (page 46).
Note:If you attach certain add-on devicessuch as a trailer or bike rack, the rear sensingsystem may detect that add-on device andtherefore provide warnings. It is suggestedthat you disable the rear sensing systemwhen you attach an add-on device to yourvehicle to prevent these warnings.
The sensing system warns the driver ofobstacles within a certain range of yourvehicle. The system turns on automaticallywhenever you switch the ignition on.
The system can be switched off throughthe information display menu or from thepop-up message that appears once youshift the transmission into reverse (R). SeeGeneral Information (page 92).
Note:On vehicles with front parking aid youcan use the parking aid switch to switch thesystem off.
If a fault is present in the system, a warningmessage appears in the informationdisplay. See Information Messages(page 103).
REAR PARKING AID
The rear sensors are only active when thetransmission is in reverse (R). As yourvehicle moves closer to the obstacle, therate of the audible warning increases.When the obstacle is less than 10 in(25 cm) away, the warning soundscontinuously. If the system detects astationary or receding object farther than10 in (25 cm) from the corners of thebumper, the tone sounds for only threeseconds. Once the system detects anobject approaching, the warning soundsagain.
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Parking Aids

Coverage area of up to 6 ft (1.8 m) fromthe rear bumper. There may be decreasedcoverage area at the outer corners of thebumper.
The system detects certain objects whilethe transmission is in reverse (R) :
•Your vehicle is moving toward astationary object at a speed of 3 mph(5 km/h) or less.
•Your vehicle is not moving, but amoving object is approaching the rearof your vehicle at a speed of 3 mph(5 km/h) or less.
•Your vehicle is moving at a speed ofless than 3 mph (5 km/h) and a movingobject is approaching the rear of yourvehicle at a speed of less than 3 mph(5 km/h).
FRONT PARKING AID
The front sensors are active when thetransmission is in any position other thanpark (P) and the vehicle speed is below8 mph (13 km/h).
Coverage area of up to 28 in (70 cm) fromthe front bumper. There is decreasedcoverage area at the outer corners.
The system sounds an audible warningwhen obstacles are near either bumper inthe following manner:
•Objects detected by the front sensorsare indicated by a high-pitched tonefrom the front of the vehicle.
•Objects detected by the rear sensorsare indicated by a lower pitched tonefrom the rear of the vehicle.
•The sensing system reports theobstacle which is closest to the frontor rear of the vehicle. For example, ifan obstacle is 12 in (30 cm) from thefront of the vehicle and, at the sametime, an obstacle is only 6 in (15 cm)from the rear of the vehicle, the lowerpitched tone sounds.
•An alternating warning sounds fromthe front and rear if there are objectsat both bumpers that are closer than10 in (25 cm).
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The Blind Spot Information Systemilluminates an amber alert indicator in theoutside mirror on the side of your vehiclethe approaching vehicle is coming from.When the Blind Spot Information Systemis alerting on a vehicle and thecorresponding turn signal is ON, the BlindSpot Information System alert indicatorflashes as an increased warning level.
The alert indicator dims when the systemdetects nighttime darkness.
Note:The alert indicator flashes in case ofan alert and the turn signal is set to that sideat the same time.
System Sensor Blockage
WARNING
To help avoid injuries, NEVER use theBlind Spot Information System as areplacement for using the interiorand exterior mirrors or looking over yourshoulder before changing lanes. The BlindSpot Information System is not areplacement for careful driving.
The system uses radar sensors that arelocated behind the bumper fascia on eachside of your vehicle. Any dirt, mud andsnow in front of the sensors and/or drivingin heavy rain can cause systemdegradation. Also, other types ofobstructions in front of the sensor cancause system degradation. This is referredto as a ‘blocked’ condition.
Note:Do not apply bumper stickers and/orrepair compound to these areas, this cancause degraded system performance.
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Driving AidsE205199

If the system detects a degradedperformance condition, a message warningof a blocked sensor will appear in theinformation display. Also the BLIS alertindicators will remain ON and BLIS will nolonger provide any vehicle warnings. Youcan clear the information display warningbut the alert indicators will remainilluminated.
A "blocked" condition can be cleared intwo ways:
•After the blockage in front of thesensors is removed or therainfall/snowfall rate decreases orstops, drive for a few minutes in trafficto allow the sensors to detect passingvehicles.
•By cycling the ignition from ON to OFFand then back ON.
Note:If your vehicle has a tow bar with afactory equipped trailer tow module and itis towing a trailer, the sensors willautomatically turn the Blind SpotInformation System off. If your vehicle hasa tow bar but no factory equipped trailertow module, it is recommended to turn theBlind Spot Information System offmanually. Operating the Blind SpotInformation System with a trailer attachedwill cause poor system performance.
System Errors
If the system senses a problem with theleft or right sensor, the telltale willilluminate and a message will appear inthe information display. See InformationMessages (page 103).
Switching the System Off and On
You can temporarily switch the Blind SpotInformation System off in the informationdisplay. See General Information (page92). When the Blind Spot InformationSystem switches off, you will not receivealerts and the information display showsa system off message. The telltale in thecluster also illuminates. When you switchthe Blind Spot Information System on oroff, the alert indicators flash twice.
Note:The Blind Spot Information Systemremembers the last selected on or offsetting.
You can also have the Blind SpotInformation System switched offpermanently at an authorized dealer. Onceswitched off permanently, the system canonly be switched back on at an authorizeddealer.
CROSS TRAFFIC ALERT
WARNING
To help avoid personal injury, NEVERuse the Cross Traffic Alert system asa replacement for using the interiorand exterior mirrors and looking over yourshoulder before backing out of a parkingspace. Cross Traffic Alert is not areplacement for careful driving.
Cross Traffic Alert is designed to warn youof vehicles approaching from the sideswhen the transmission is in reverse (R).
Using the System
Cross Traffic Alert turns on when you startthe engine and you shift into reverse (R).Once shifted out of reverse (R), CrossTraffic Alert turns off.
Note:Cross Traffic Alert only functionswhile your transmission is in reverse (R).
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Driving Aids

Cross Traffic Alert is designed to detectvehicles that approach with a speed up to37 mph (60 km/h). Coverage decreaseswhen the sensors are partially, mostly or
fully obstructed. Reversing slowly helpsincrease the coverage area andeffectiveness.
In this first example, the left sensor is onlypartially obstructed; zone coverage to theright is nearly maximized.
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Zone coverage also decreases whenparking at shallow angles. Here, the leftsensor is mostly obstructed; zone coverageon that side is severely limited.
System Lights, Messages andAudible Alerts
The Cross Traffic Alert illuminates anamber alert indicator in the outside mirroron the side of your vehicle the approachingvehicle is coming from. Cross Traffic Alertalso sounds an audible alert and amessage appears in the informationdisplay indicating a vehicle is coming fromthe right or left. Cross Traffic Alert workswith the reverse sensing system thatsounds its own series of tones. See RearParking Aid (page 181).
The system uses radar sensors that arelocated behind the bumper fascia on eachside of your vehicle. Do not allow mud,snow or bumper stickers to obstruct theseareas, this can cause degraded systemperformance. See Blind SpotInformation System (page 188). If theBlind Spot Information System is blocked,Cross Traffic Alert is also blocked. Acorresponding message appears in theinformation display as soon as you shiftthe transmission into reverse (R).
System Limitations
Cross Traffic Alert has its limitations;situations such as severe weatherconditions or debris build-up on the sensorarea may limit vehicle detection.
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The following are other situations that maylimit the Cross Traffic Alert performance:
•Adjacently parked vehicles or objectsobstructing the sensors.
•Approaching vehicles passing atspeeds greater than 37 mph(60 km/h).
•Driving in reverse faster than 7 mph(12 km/h).
•Backing out of an angled parking spot.
False Alerts
Note:If your vehicle has a tow bar with afactory equipped trailer tow module and itis towing a trailer, the sensors willautomatically turn the Cross Traffic Alertoff. If your vehicle has a tow bar but nofactory equipped trailer tow module, it isrecommended to turn the Cross Traffic Alertoff manually. Operating Cross Traffic Alertwith a trailer attached will cause poor CrossTraffic Alert performance.
There may be certain instances when thereis a false alert by the Cross Traffic Alertsystem that illuminates the alert indicatorwith no vehicle in the coverage zone. Someamount of false alerts are normal; they aretemporary and self-correct.
System Errors
If Cross Traffic Alert senses a problem withthe left or right sensor a message willappear in the information display. SeeInformation Messages (page 103).
Switching the System Off and On
You can temporarily switch Cross TrafficAlert off in the information display. SeeGeneral Information (page 92). Whenyou switch Cross Traffic Alert off, you willnot receive alerts and the informationdisplay will display a system off message.
Note:The Cross Traffic Alert switches onwhenever the ignition is switched on andready to provide appropriate alerts whenthe transmission is in reverse (R). CrossTraffic Alert will not remember the lastselected on or off setting.
You can also have Cross Traffic Alertswitched off permanently at an authorizeddealer. Once switched off permanently,the system can only be switched back onat an authorized dealer.
STEERING
Electric Power Steering
WARNINGS
The electric power steering systemhas diagnostic checks thatcontinuously monitor the system. Ifa fault is detected, a message displays inthe information display. Stop your vehicleas soon as it is safe to do so. Switch theignition off. After at least 10 seconds,switch the ignition on and watch theinformation display for a steering systemwarning message. If a steering systemwarning message returns, have the systemchecked by an authorized dealer.
If the system detects an error, youmay not feel a difference in thesteering, however a serious conditionmay exist. Obtain immediate service froman authorized dealer, failure to do so mayresult in loss of steering control.
Your vehicle has an electric power steeringsystem. There is no fluid reservoir. Nomaintenance is required.
If your vehicle loses electrical power whileyou are driving, electric power steeringassistance is lost. The steering system stilloperates and you can steer your vehiclemanually. Manually steering your vehiclerequires more effort.
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Driving Aids

Protected componentsFuse amp ratingFuse or relay number
Electronic cooling fan.Relay6
Rear window defroster.Relay7Heated mirror relay.
Electronic cooling fan.Relay8
Run/start relay.Relay9
Power distribution box relay.Relay10
Power running boards.40A*11Heated seats.
Run/start relay.40A*12
Starter relay.30A*13
Electronic cooling fan.50A*14
Not used.—15
Electronic fan.50A*16
Not used.—17
Trailer brake.30A*18
Power point (console).20A*19
4x4 module HAT 2.20A*20
Trailer tow module.30A*21
Passenger power seat.30A*22
Air conditioner clutch relay.Relay23
Trailer tow park lamp relay.Relay24
Not used.—25
ALT sensor.10A**26
4x4 module HAT 1.20A**27
Trailer tow park lamp relay.25A**28
Integrated wheel end solenoid.10A**29
Air conditioner clutch relay.10A**30
Trailer tow back up lamp.15A**31
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Fuses