2019 VOLVO S90 TWIN ENGINE brake

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Standby mode due to action by the driver
Pilot Assist will be temporarily deactivated andput in standby mode if:
the brakes are applied.
the gear selector is moved to N
a turn signal is used for more than 1 minute.
the vehicle is driven faster than the setspeed for more than 1 minute
Temporarily increasing speed using the accelera-tor pedal, e.g. when passing another vehicle, willnot affect the setting. The vehicle will return tothe set speed when the accelerator pedal isreleased.
When the turn signals are used, Pilot Assist'ssteering assistance will be temporarily deacti-vated. When the turn signal is switched off, steer-ing assistance will be automatically reactivated ifthe traffic lane's side markings can still bedetected.

Automatic standby mode
Pilot Assist is dependent on other systems, such
as Electronic Stability Control (ESC56). If any ofthese other systems stops working, Pilot Assistwill automatically switch off.
WARNING
With automatic standby mode, the driver iswarned by an acoustic signal and a messageon the instrument panel.
The driver must then regulate vehiclespeed, apply the brakes if necessary, andmaintain a safe distance to other vehicles.
Adaptive Cruise Control may go into standbymode if, e.g.:
the driver opens the door.
the brake temperature is high.
the driver's hands are not on the steeringwheel.
the parking brake is applied.
the engine speed (rpm) is too low/high.
the driver unbuckles the seat belt.
one or more of the wheels lose traction.
the camera/radar sensor is covered by snowor heavy rain (the camera lens/radar wavesare blocked)
your vehicle's speed goes below 5 km/h(3 mph) and Pilot Assist cannot determine ifthe vehicle ahead is stationary or if it isanother object, e.g. a speed bump.
your vehicle's speed goes under 5 km/h(3 mph) and the vehicle ahead turns so thatPilot Assist no longer has a vehicle to follow.

Reactivating Pilot Assist from standby
mode
Note: This illustration is general and details may varydepending on model.
To reactivate Pilot Assist:
–Press the button on the steering wheel(1).
> Speed will be set to the most recentlystored speed.
56Electronic Stability Control

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Starting passing assistance withPilot Assist
Several conditions must be met for passingassistance to be possible.
In order to activate passing assistance:
your vehicle must be following a vehicleahead (target vehicle)
your vehicle's current speed must beat least 70 km/h (43 mph)
the set speed for Pilot Assist must be highenough to safely pass another vehicle.

Starting parking assistance
To start passing assistance:
–Turn on the left turn signal.
> Passing assistance will start.

Related information
Pilot Assist (p. 308)
Passing assistance with Pilot Assist (p. 318)
Passing assistance with Pilot Assistlimitations
Passing assistance functionality may be reducedin certain situations.
WARNING
The driver should be aware that if conditionssuddenly change when using Parking Assis-tance, the function may implement an unde-sired acceleration in certain conditions.
Some situations should be avoided, e.g. if:
the vehicle is approaching an exit in thesame direction as passing would normallyoccur
the vehicle ahead slows before your vehi-cle has had time to switch to the passinglane
traffic in the passing lane slows down
a vehicle for right-hand traffic is driven ina country with left-hand traffic (or viceversa).
Situations of this type can be avoided by tempo-rarily putting Pilot Assist in standby mode.

Related information
Pilot Assist (p. 308)
Passing assistance with Pilot Assist (p. 318)
Switching target vehicles with PilotAssist
At certain speeds, models with automatic trans-missions and Pilot Assist can switch target vehi-cles.
Switching target vehicles
If the target vehicle ahead turns suddenly, there may bestationary traffic ahead.
When Pilot Assist is actively following anothervehicle at speeds under 30 km/h (20 mph) andswitches targets from a moving vehicle to a sta-tionary vehicle, Pilot Assist will brake for the sta-tionary vehicle.

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WARNING
When Pilot Assist follows another vehicle atspeeds over approx. 30 km/h (20 mph) andchanges target vehicle – from a moving vehi-cle to a stationary one – Pilot Assist willignore the stationary vehicle and insteadaccelerate to the stored speed.
The driver must then intervene and applythe brakes.

Automatic standby mode when switching
targets
Pilot Assist disengages and goes into standbymode if:
your vehicle's speed goes below 5 km/h(3 mph) and Pilot Assist cannot determine ifthe target object is a stationary vehicle oranother object, e.g. a speed bump.
your vehicle's speed goes under 5 km/h(3 mph) and the vehicle ahead turns so thatPilot Assist no longer has a vehicle to follow.

Related information
Pilot Assist (p. 308)
Auto-hold braking with Pilot Assist
Pilot Assist has a special braking function inslow traffic and at a standstill.
Braking function in slow traffic and at a
standstill
In slow-moving, stop-and-go traffic or when stop-ped at a traffic light, driving will resume automati-cally if the vehicle is stopped for less thanapprox. 3 seconds. If it takes more than 3 sec-onds for the vehicle ahead to begin moving again,Pilot Assist will go into standby mode and theAuto-hold brake function will activate.
–Pilot Assist can be reactivated by:
Pressing the button on the steeringwheel keypad.
Pressing the accelerator pedal.
> Pilot Assist will resume following the vehi-cle ahead if it begins to move withinapprox. 6 seconds.

NOTE
Pilot Assist can keep the vehicle stationaryfor no more than 5 minutes – after that timethe parking brake is applied and the functionis deactivated.
The parking brake must be released beforePilot Assist can be reactivated.
Deactivation of the Auto-hold brake function
In certain situations, Auto-hold will be deactivatedwhen the vehicle is at a standstill and Pilot Assistwill go into standby mode. This means that thebrakes will be released and the vehicle couldbegin to roll. The driver must actively apply thebrakes to keep the vehicle stationary.
This can occur if:
the driver depresses the brake pedal
the parking brake is applied
the gear selector is moved to the P, N or Rpositions
the driver puts Pilot Assist in standby mode.

Auto Activate Parking Brake
In certain situations, the parking brake will beapplied to keep the vehicle at a standstill.
This occurs if Pilot Assist is keeping the vehiclestationary using the brakes and:
the driver opens the door or unbuckleshis/her seat belt
Pilot Assist has kept the vehicle at a stand-still for more than approx. 5 minutes
the brakes overheat
the driver switches off the engine manually.

Related information
Pilot Assist (p. 308)

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Steep roads and/or heavy loads
Pilot Assist is primarily intended to be driven onflat roads. The function may not be able to main-tain the correct time interval to the vehicle aheadwhen driving down steep hills. The driver shouldbe extra attentive and prepared to apply thebrakes.
Do not use Pilot Assist if the vehicle is carry-ing a heavy load or towing a trailer.

NOTE
Pilot Assist cannot be activated if a trailer,bike carrier or similar is connected to thevehicle electrical system.

Other limitations
The Off Road drive mode cannot beselected when Pilot Assist is activated.

NOTE
The function uses the vehicle's combinedcamera and radar unit, which has certain gen-eral limitations; see sections "Camera limita-tions" and "Radar sensor limitations".

Related information
Pilot Assist (p. 308)
Speed-dependent steering wheel resistance(p. 270)
Camera limitations (p. 330)
Radar sensor limitations (p. 325)
Pilot Assist* symbols and messages
A number of symbols and messages relating toPilot Assist may be displayed in the instrumentpanel and/or the head-up display*.

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Recommended maintenance for thecamera/radar sensor
In order for the camera/radar sensor to functionproperly, the area of the windshield in front ofthe unit must be kept free of dirt, ice, snow, etc.and should be washed regularly with water andcar washing detergent.

NOTE
Dirt, ice and snow covering the camera andradar unit reduce their function and can makemeasurement impossible.
It could cause functions to be reduced, deac-tivated completely or produce an incorrectfunction response.

Related information
Camera (p. 329)
City Safety™
City Safety can alert the driver with light, soundand pulsations in the brake pedal to help thedriver detect pedestrians, cyclists, large animalsand vehicles that appear suddenly – the vehiclewill then attempt to automatically brake if thedriver does not act within a reasonable amountof time.
Location of the camera and radar sensor65.
City Safety can help prevent a collision or lowerthe vehicle's speed at the point of impact.
City Safety is an aid intended to assist the driverif a collision with a pedestrian, large animal,cyclist or vehicle is imminent.
City Safety can help the driver avoid a collisionwhen e.g. driving in stop-and-go traffic, when
changes in the traffic ahead and driver distractioncould lead to an incident.
The function assists the driver by automaticallyapplying the brakes if there is an imminent risk ofa collision and the driver does not react in time bybraking and/or steering away.
City Safety activates a brief, forceful braking in anattempt to stop your vehicle immediately behindthe vehicle or object ahead.
City Safety is activated in situations in which thedriver should have applied the brakes much ear-lier, which means that the system will not be ableto assist the driver in all situations.
City Safety is designed to be activated as late aspossible to help avoid unnecessary intervention.
Normally, the occupants of the vehicle will not beaware of City Safety except when the systemintervenes when a collision is imminent.
65Note: This illustration is general and details may vary depending on model.

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WARNING
The City Safety function is supplementarydriver support intended to help improvedriving safety – it cannot handle all situa-tions in all traffic, weather and road condi-tions.
The City Safety auto-brake function canprevent a collision or reduce collisionspeed, but to ensure full brake perform-ance the driver should always depress thebrake pedal – even when the car auto-brakes.
The warning and steering assistance areonly activated if there is a high risk of col-lision – you must therefore never wait forthe collision warning or City Safety tointervene.
Warnings and brake interventions forpedestrians and cyclists are disengagedat vehicle speeds over 80 km/h(50 mph).
City Safety does not activate auto-brakingintervention during heavy acceleration.
City Safety is not a substitute for the driv-er's attention and judgment. The driver isalways responsible for ensuring the vehi-cle is driven in a safe manner, at theappropriate speed, with an appropriatedistance to other vehicles, and in accord-ance with current traffic rules and regula-tions.
The driver is advised to read all sectionsin the Owner's Manual that relate to CitySafety to learn about factors such as itslimitations and what the driver should beaware of before using the system (seethe list of links for all subsections).

Related information
City Safety parameters and sub-functions(p. 334)
Setting a warning distance for City Safety(p. 336)
Detecting obstacles with City Safety (p. 337)
City Safety in crossing traffic (p. 339)
Limitations of City Safety in crossing traffic(p. 340)
City Safety and delayed evasive maneuvers(p. 341)
City Safety braking for oncoming vehicles(p. 342)
City Safety limitations (p. 343)
City Safety messages (p. 345)
City Safety parameters and sub-functions
City Safety can help avoid a collision with a vehi-cle, cyclist or large animal ahead by reducing thevehicle's speed using its automatic braking func-tion.
If the difference in speed is greater than thespeeds specified below, the City Safety auto-brake function cannot prevent a collision, but itcan help mitigate its effects.

Vehicles
City Safety can help prevent a collision with avehicle ahead by reducing your vehicle's speedby up to 60 km/h (37 mph).

Cyclists
City Safety can help prevent a collision with acyclist ahead by reducing your vehicle's speed byup to 50 km/h (30 mph).

Pedestrians
City Safety can help prevent a collision with apedestrian ahead by reducing your vehicle'sspeed by up to 45 km/h (28 mph).

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Large animals
If there is a risk of colliding with a large animal,City Safety can help reduce your vehicle's speedby up to 15 km/h (9 mph).
The braking function for large animals is primarilyintended to mitigate the force of a collision athigher speeds. Braking is most effective atspeeds above 70 km/h (43 mph) and less effec-tive at lower speeds.

City Safety sub-functions
Function overview66.
Acoustic collision warning signal
Collision warning symbol
Camera/radar sensor distance monitoring
City Safety carries out three steps in the follow-ing order:
1.Collision warning
2.Brake assistance
3. Auto-brake
Descriptions of what happens in these threesteps are provided below.
1 - Collision warning
The driver is first alerted to the risk of an immi-nent collision.
In vehicles equipped with a head-up display*, aflashing warning symbol will be displayed on thewindshield.
Collision warning symbol on the windshield67.
NOTE
Visual warnings on the windshield may be dif-ficult to notice in cases of strong sunlight,reflections, extreme light contrasts, or if thedriver is wearing sunglasses or is not lookingstraight ahead.
City Safety can detect pedestrians, cyclists orvehicles that are stationary, are moving in thesame direction as your vehicle and are ahead ofyour vehicle. City Safety can also detect pedes-trians, cyclists or large animals that are crossingthe road in front of your vehicle.
If there is a risk of a collision with a pedestrian,large animal, cyclist or another vehicle, or with avehicle described in the section "City Safety incrossing traffic", the driver will be alerted withlight, sound and pulsations in the brake pedal. Atlower speeds, during hard braking or if the accel-erator pedal is pressed, the brake pedal pulsationwarning will not be given. The intensity of thebrake pedal pulsations varies according to thevehicle's speed.
66Note: This illustration is general and details may vary depending on model.67Note: This illustration is general and details may vary depending on model.

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2 - Brake assistance
If the risk of a collision increases after the colli-sion warning, brake support will be activated.
If the system determines that the pressure thedriver is exerting on the brake pedal is insufficientto prevent the collision, brake support willincrease pressure.

3 - Auto-brake
The automatic braking function is activated at thelast moment.
If the driver has not taken evasive action by thisstage and a collision is imminent, the automaticbraking function will be triggered. This occurswhether or not the driver is pressing the brakepedal. Full braking force will be applied to reducethe speed at impact or reduced braking effect willbe applied if this is sufficient to avoid the colli-sion.
The seat belt tensioners may be activated alongwith the automatic braking function. See "Seatbelt tensioners" for more information.
In certain situations, auto-braking may begin witha limited braking force before applying full brak-ing force.
If City Safety has prevented a collision, the vehi-cle will be kept at a standstill until the drivertakes action. If the vehicle has slowed to avoidcolliding with a slower-moving vehicle ahead, yourspeed will be reduced to that vehicle's speed.
Auto-braking can always be cancelled if thedriver presses hard on the accelerator pedal.
NOTE
When City Safety activates the brakes, thebrake lights come on.
When City Safety applies the brakes, a text mes-sage will appear in the instrument panel to notifythe driver that the function is/was activated.

WARNING
City Safety may not be used to change howthe driver operates the vehicle. The drivermust not only rely on City Safety to brake thevehicle.

Related information
City Safety™ (p. 333)
Setting a warning distance for CitySafety
City Safety is always active, but the function'swarning distance can be adjusted.
NOTE
The City Safety function cannot be deacti-vated. It is activated automatically each timethe engine/electric motor is started.
The alert distance determines the sensitivity ofthe system and regulates the distance at whichthe light, sound and brake pulsations will be acti-vated.
To select warning distance:
1. Select SettingsMy CarIntelliSafe inthe center display's Top view.
2.Under City Safety Warning, tap Late,Normal or Early to set the desired warningdistance.
If the driver feels that the Early setting is givingtoo many warnings or finds them irritating, theNormal or Late warning distance settings canbe selected instead.
If the driver feels that the warnings are too fre-quent and distracting, the warning distance canbe reduced. This will reduce the total number ofwarnings, but it will also result in City Safety pro-viding warnings at a later stage.