brake LINCOLN MKZ 2019 Service Manual

Note:Auto Hold is last remembered afterignition. Auto Hold also suppresses while inReverse (R).
When Auto Hold is off, your vehicle behavesthe same as a vehicle without Auto Hold.
There is an Auto Hold indicator lamp in theinstrument cluster that has two modes, activeand unavailable:
The Auto Hold (ACTIVE) indicatorlight illuminates in the informationdisplay when the system holdsyour vehicle stationary. When in active mode,press the brake pedal and the Auto Holdbutton to switch Auto Hold off.
The Auto Hold (UNAVAILABLE)indicator light illuminates in theinformation display when thesystem is on but unavailable to hold yourvehicle (for example, during Active ParkAssist, Stay in Neutral Mode, or when youdo not fasten your seatbelt or close thedoor).
Note:Make sure you switch off Auto Holdor use the Stay in Neutral mode before youenter a car wash. See AutomaticTransmission (page 177).
Using Auto Hold
1. Bring your vehicle to a stop by pressingthe brake pedal. After coming to a stop,the green Auto Hold (ACTIVE) indicatorlamp illuminates in the informationdisplay.
2.Release the brake pedal. The Auto Hold(ACTIVE) indicator light remainsilluminated in the information display andAuto Hold will hold your vehicle at a stop.
3. When you press the accelerator pedal,Auto Hold releases the brakes and youwill be able to drive off. Once you driveoff, the green Auto Hold (ACTIVE)indicator no longer illuminates in theinformation display.
Note:The Stop/Start system (if equipped)may stop the engine when you press thebrake pedal. If this occurs, it will restart onceyou press the accelerator pedal. Auto Holdstill holds your vehicle at a standstill with theengine off.
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PRINCIPLE OF OPERATION
The traction control system helps avoid drivewheel spin and loss of traction.
If your vehicle begins to slide, the systemapplies the brakes to individual wheels and,when needed, reduces engine power at thesame time. If the wheels spin whenaccelerating on slippery or loose surfaces,the system reduces engine power in orderto increase traction.
USING TRACTION CONTROL
WARNING: The stability and tractioncontrol light illuminates steadily if the systemdetects a failure. Make sure you did notmanually disable the traction control systemusing the information display controls or theswitch. If the stability control and traction
control light is still illuminating steadily, havethe system serviced by an authorized dealerimmediately. Operating your vehicle with thetraction control disabled could lead to anincreased risk of loss of vehicle control,vehicle rollover, personal injury and death.
The system automatically turns on each timeyou switch the ignition on.
If your vehicle is stuck in mud or snow,switching traction control off may bebeneficial as this allows the wheels to spin.
Note:When you switch traction control off,stability control remains fully active.
Switching the System Off
When you switch the system off or on, amessage appears in the information displayshowing system status.
You can switch the system off by either usingthe information display controls or the switch.
Using the Information Display Controls
You can switch this feature off or on in theinformation display. See General Information(page 110).
Using a Switch (If Equipped)
Use the traction control switch on theinstrument panel to switch the system off oron.
System Indicator Lights and Messages
The stability and traction controllight:
•Temporarily illuminates on enginestart-up.
•Flashes when a driving conditionactivates either of the systems.
•Illuminates if a problem occurs in eitherof the systems.
The stability and traction controloff light temporarily illuminates onengine start-up and stays on whenyou switch the traction control system off.
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PRINCIPLE OF OPERATION
WARNING: Vehicle modificationsinvolving braking system, aftermarket roofracks, suspension, steering system, tireconstruction and wheel and tire size maychange the handling characteristics of yourvehicle and may adversely affect theperformance of the electronic stability controlsystem. In addition, installing any stereoloudspeakers may interfere with andadversely affect the electronic stabilitycontrol system. Install any aftermarket stereoloudspeaker as far as possible from the frontcenter console, the tunnel, and the frontseats in order to minimize the risk ofinterfering with the electronic stability controlsensors. Reducing the effectiveness of theelectronic stability control system could leadto an increased risk of loss of vehicle control,vehicle rollover, personal injury and death.
WARNING: Remember that evenadvanced technology cannot defy the lawsof physics. It’s always possible to lose controlof a vehicle due to inappropriate driver inputfor the conditions. Aggressive driving on anyroad condition can cause you to lose controlof your vehicle increasing the risk of personalinjury or property damage. Activation of theelectronic stability control system is anindication that at least some of the tires haveexceeded their ability to grip the road; thiscould reduce the operator’s ability to controlthe vehicle potentially resulting in a loss ofvehicle control, vehicle rollover, personalinjury and death. If your electronic stabilitycontrol system activates, SLOW DOWN.
The system automatically turns on each timeyou switch the ignition on.
If a fault occurs in either the stability controlor the traction control system, you mayexperience the following conditions:
•The stability and traction control lightilluminates steadily.
•The stability control and traction controlsystems do not enhance your vehicle'sability to maintain traction of the wheels.
If a driving condition activates either thestability control or the traction control systemyou may experience the following conditions:
•The stability and traction control lightflashes.
•Your vehicle slows down.
•Reduced engine power.
•A vibration in the brake pedal.
•The brake pedal is stiffer than usual.
•If the driving condition is severe and yourfoot is not on the brake, the brake pedalmay move as the system applies higherbrake force.
The stability control system has severalfeatures built into it to help you maintaincontrol of your vehicle:
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Stability Control

Electronic Stability Control
The system enhances your vehicle’s abilityto prevent skids or lateral slides by applyingbrakes to one or more of the wheelsindividually and, if necessary, reducingengine power.
Traction Control
The system enhances your vehicle’s abilityto maintain traction of the wheels bydetecting and controlling wheel spin. SeeUsing Traction Control (page 197).
Vehicle without stability controlskidding off its intended route.A
Vehicle with stability controlmaintaining control on a slipperysurface.
B
USING STABILITY CONTROL
The system automatically turns on each timeyou switch the ignition on.
The electronic stability control portion of thesystem disables when the transmission is inreverse (R) or, on some models, if you pressand hold the stability control button for morethan five seconds when you apply the brakesand the vehicle is at a stop.
You can switch the traction control systemoff or on independently.
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Stability Control and Traction Control Features
Collision Warningwith Brake SupportTraction ControlSystemElectronic StabilityControlStability Control OffLightModeButton Functions
EnabledEnabledEnabledOn during bulb checkStability and tractioncontrol fully enabledDefault at start-up
EnabledDisabledEnabledOnTraction control offButton pressedmomentarily
DisabledEnabled with higherthreshold targetEnabled with higherthreshold targetOnSport mode (ifequipped)Button pressed twicerapidly
DisabledDisabledDisabledOnStability and tractioncontrol fully disabledButton pressed andheld more than fiveseconds
EnabledEnabledEnabledOffStability and tractioncontrol fully enabledButton pressed againafter deactivation
Note:Stability control fully off can only occurwhen you put the Active Suspension System(CCD) in sport mode. If you are not in sportmode or change from sport mode to anothermode, the stability control enables.
Note:Do not use Sport mode on publicroadways.
Your vehicle, if equipped with sport modeallows you to reduce normal stability andtraction control system intervention andprovide a more spirited driving experience.To enter sport mode, press the stabilitycontrol button twice rapidly. A messageappears in the information display that thesystem is now in sport mode.
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Stability Control

PRINCIPLE OF OPERATION
WARNING: To help avoid personalinjury, always use caution when in reverse(R) and when using the sensing system.
WARNING: The system may not detectobjects with surfaces that absorb reflection.Always drive with due care and attention.Failure to take care may result in a crash.
WARNING: Traffic control systems,inclement weather, air brakes, externalmotors and fans may affect the correctoperation of the sensing system.This maycause reduced performance or false alerts.
WARNING: The system may not detectsmall or moving objects, particularly thoseclose to the ground.
Note:If your vehicle is equipped withMyKey™, the sensing system cannot beturned off when a MyKey™ is present. SeePrinciple of Operation (page 62).
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 with sharpobjects.
Note:If your vehicle sustains damage to thebumper or fascia, leaving it misaligned orbent, the sensing zone may be alteredcausing inaccurate measurement ofobstacles or false alerts.
Note:Certain add-on devices installedaround the bumper or fascia may createfalse alerts. For example, large trailerhitches, bike or surfboard racks, license platebrackets, bumper covers or any other devicethat may block the normal detection zoneof the system. Remove the add-on device toprevent false alerts.
Note:When a trailer is connected to yourvehicle, the rear parking aid may detect thetrailer and therefore provide an alert. Disablethe rear parking aid when a trailer isconnected to prevent the alert.
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 through theinformation display menu or from the pop-upmessage that appears once you shift thetransmission into reverse (R). See GeneralInformation (page 110).
If a fault is present in the system, a warningmessage appears in the information display.See Information Messages (page 116).
REAR PARKING AID
The rear sensors are only active when thetransmission is in reverse (R). As your vehiclemoves closer to the obstacle, the rate of theaudible warning increases. When theobstacle is less than 12 in (30 cm) away, thewarning sounds continuously. If the systemdetects a stationary or receding objectfarther than 12 in (30 cm) from the corners ofthe bumper, the tone sounds for only threeseconds. Once the system detects an objectapproaching, the warning sounds again.
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Parking Aids

If the transmission is in neutral (N), the sidesensing system provides visual distanceindication only when your vehicle is movingbelow a speed of 5 mph (8 km/h) and thereis a front or rear parking aid obstacledetected, and the side obstacle is within24 in (60 cm) from the side of your vehicle.When you stop your vehicle the visualdistance indication stops after four seconds.
If the side sensing system is not available,the side distance indicator blocks do notappear.
The side sensing system is not availableunder the following condition:
•If you switch the traction control systemoff.
The side sensing system may not beavailable until you have driven approximatelythe length of your vehicle in order for thesystem to reinitialize if:
•You switch the ignition on, off and backon.
•Your vehicle remains stationary for overtwo minutes.
•The anti-lock brake system is activated.
•The traction control system is activated.
•When the steering wheel angleinformation is not available, the sidesensing system is not available. Thevehicle must be driven at least 492 ft(150 m) above 19 mph (30 km/h) torecover the steering wheel angleinformation.
ACTIVE PARK ASSIST (If Equipped)
WARNING: You must remain in yourvehicle when the system turns on. At alltimes, you are responsible for controllingyour vehicle, supervising the system andintervening, if required. Failure to take caremay result in the loss of control of yourvehicle, serious personal injury or death.
WARNING: The sensors may not detectobjects in heavy rain or other conditions thatcause interference.
WARNING: Active park assist does notapply the brakes under any circumstances.
WARNING: You are responsible forcontrolling your vehicle at all times. Thesystem is designed to be an aid and doesnot relieve you of your responsibility to drivewith due care and attention. Failure to followthis instruction could result in the loss ofcontrol of your vehicle, personal injury ordeath.
Note:Keep the sensors free from snow, iceand large accumulations of dirt.
Note:Do not cover up the sensors.
Note:Do not clean the sensors with sharpobjects.
Note:The sensors may not detect objectswith surfaces that absorb ultrasonic waves.The sensors may falsely detect objects dueto ultrasonic interference caused bymotorcycle exhausts, truck air brakes orhorns, for example.
Note:If you change any tires, the systemmust recalibrate and may not correctlyoperate for a short time.
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Parking Aids

To toggle through the modes, use thebuttons on the information display to selectthe following:
•Parallel parking.
•Perpendicular parking.
•Parallel park out assist.
•Switch the system off.
Note:There is no time limit for togglingthrough the modes.
Parallel Parking
The system detects available parallel parkingspaces and steers your vehicle into thespace. You control the accelerator, gearshiftand brakes. The system visually and audiblyguides you into a parallel parking space.
Press the button once to searchfor a parking space.
Note:You can also switch the system onafter you have already driven partially orcompletely past a parking space. Press theactive park assist button and the systeminforms you if you have recently passed asuitable parking space.
When the vehicle speed is less than 22 mph(35 km/h), the system scans both sides ofyour vehicle for an available parking space.A message and a graphic appear in theinformation display to indicate the system issearching for a parking space. Use thedirection indicator lever to search for aparking space on the driver or passengerside of your vehicle.
Note:The system scans both sides of yourvehicle and offers parking spaces one sideat a time if you do not use the directionindicator.
Note:The system defaults to the passengerside if you do not use the direction indicator.
Drive your vehicle approximately 3 ft (1 m)and parallel to the other parked vehicleswhen searching for a parking space.
Note:If you drive your vehicle less than 2 ft(0.5 m) or greater than 5 ft (1.5 m) away fromother parked vehicles, the system may notbe able to detect an available parkingspace.
When the system detects a suitable space,a message displays and a tone sounds. Stopyour vehicle and follow the onscreeninstructions. If your vehicle is moving veryslowly, you may have to move forward ashort distance before the system is ready topark.
Note:You must observe that the space thesystem selects remains clear of obstructionsat all times during the maneuver.
Note:The system always offers the lastparking space it detects. For example, if yourvehicle detects multiple spaces when youare driving, it offers the last one.
Note:If the vehicle speed is greater thanapproximately 22 mph (35 km/h), the systemshows a message to instruct you to reducethe vehicle speed.
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Automatically Steering into a ParallelParking Space
When you shift into reverse (R), with yourhands off the steering wheel and nothingobstructing its movement, your vehicle steersitself into the space. The system displaysinstructions to move your vehicle backwardand forward in the space.
Note:If the vehicle speed exceedsapproximately 6 mph (9 km/h), you interruptthe maneuver, or the system switches off,you must take full control of your vehicle.
Note:If the system detects an object is veryclose to your vehicle and it may be unsafeto continue the maneuver, it may instruct youto stop your vehicle. The system may notprovide any further instruction. Steeringassistance continues to operate but youmust decide if it is safe to continue themaneuver.
When you believe your vehicle is correctlyparked, or a solid tone sounds and aninformation message appears, bring yourvehicle to a complete stop.
When the Active Park Assist maneuver iscomplete, a tone sounds and an informationmessage appears.
Note:You are responsible for checking howyour vehicle is parked and making anynecessary corrections before leaving yourvehicle.
Deactivating Active Park Assist
You can manually deactivate the system by:
•Pressing the Active Park Assist buttonduring an active maneuver.
•Grabbing the steering wheel during anactive maneuver.
•Driving above 22 mph (35 km/h) for 30seconds when searching for a parkingspace.
•Driving above 31 mph (50 km/h).
•Driving above 6 mph (9 km/h) during anactive maneuver.
•Switching the traction control system off.
Certain vehicle conditions may alsodeactivate the system, for example:
•The traction control system activates orfails.
•The anti-lock brake system activates orfails.
If the system malfunctions, a messageappears and a tone sounds. Have yourvehicle checked as soon as possible.
Perpendicular Parking
The system detects available perpendicularparking spaces and steers your vehicle intothe space. You control the accelerator,gearshift and brakes. The system visuallyand audibly guides you into a perpendicularparking space.
Press the button twice to searchfor a parking space.
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When you believe your vehicle is correctlyparked, or a solid tone sounds and aninformation message appears, bring yourvehicle to a complete stop.
When the active park assist maneuver iscomplete, a tone sounds and a messageappears.
Note:You are responsible for checking howyour vehicle is parked and making anynecessary corrections before leaving yourvehicle.
Deactivating Active Park Assist
You can manually deactivate the system by:
•Pressing the Active Park Assist buttonduring an active maneuver.
•Grabbing the steering wheel during anactive maneuver.
•Driving above 19 mph (30 km/h) for 30seconds when searching for a parkingspace.
•Driving above 31 mph (50 km/h).
•Driving above 6 mph (9 km/h) during anactive maneuver.
•Switching the traction control system off.
Certain vehicle conditions may alsodeactivate the system, for example:
•The traction control system activates orfails.
•The anti-lock brake system activates orfails.
If the system malfunctions, a messageappears and a tone sounds. Have yourvehicle checked as soon as possible.
Parallel Park Out Assist
The system steers your vehicle out of aparallel parking space. You control theaccelerator, gearshift and brakes. The systemvisually and audibly guides you out of aparallel parking space.
Note:This system is not intended to assistwhen exiting a perpendicular parking space.
Press the button once when yourvehicle is stationary in a parallelparking space.
Note:If you did not use active park assist toparallel park your vehicle, pressing thebutton once selects parallel park. You mustuse the information display to select parkout assist.
The system displays a message instructingyou to switch a direction indicator on. Usethe direction indicator to select which sideof your vehicle you want to exit the parkingspace. The system displays instructions tomove your vehicle backward and forward inthe space.
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