VOLVO S90 2018 Owner´s Manual

DRIVER SUPPORT
319
Recommended maintenance for theradar sensor
In order for the camera/radar sensor to function properly, the area of the windshield in front of theunit must be kept free of dirt, ice, snow, etc. andshould be washed regularly with water and carwashing detergent.
NOTE
Dirt, ice and snow covering the camera and radar 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
•Radar sensor (p. 315)
Radar sensor type approval
The type approval for the vehicle radar sensor in the ACC 67
, PA 68
and BLIS 69
functions can be
read here.
ACC 67
, PA 68
and BLIS 69USA & Canada: FCC ID: L2C0054TR IC: 3432A-0054TR FCC ID: L2C0055TR IC: 3432A-0055TRThis device complies with Part 15 of the FCC Rules and with Industry Canada license-exemptRSS standard(s). Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may causeundesired operation. Cet appareil est conforme aux CNR d

DRIVER SUPPORT
* Option/accessory.
320
Camera
The camera is used by several driver support systems to e.g. detect lane marker lines or roadsigns.
Note: This illustration is general and details may vary depending on model.
The camera is used by the following functions:
• Adaptive Cruise Control
*
• Pilot Assist
*
• Lane Keeping Aid
*
• Steering assistance at risk of collision
• City Safety
• Driver Alert Control
*
• Road Sign Information
*
• Active high beams
*
Related information
•Camera limitations (p. 321)
• Recommended maintenance for the camera/ radar sensor (p. 324)

DRIVER SUPPORT
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321
Camera limitations
The camera used by several of the driver support functions has certain limitations, which alsoaffect the functions using the camera.
Reduced visibilityThe camera has the same limitations as the human eye. In other words, its “vision" is impairedby adverse weather conditions such as heavysnowfall/rain, dense fog, swirling dust/snow, etc.These conditions may reduce the function of sys-tems that depend on the camera or cause thesesystems to temporarily stop functioning. Strong sunlight, reflections from the road surface, ice or snow covering the road, a dirty road sur- face, or unclear lane marker lines may drastically reduce the camera

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DRIVER SUPPORT
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CauseAction
The area of the windshield in front of the camera/radar sensor is dirty or covered by ice or snow. Clean the windshield in front of the camera/radar sensor and remove dirt, ice andsnow.
Thick fog, heavy rain or snow is blocking the radar signals or thecamera's range of visibility. No action. Heavy precipitation may sometimes prevent the camera/radar sensor fromfunctioning.
Water or snow is spraying/swirling up and blocking the radar signalsor the camera's range of visibility. No action. Very wet or snow-covered roads may sometimes prevent the camera/radar sensor from functioning.
There is dirt between the inside of the windshield and the camera/radar sensor. Consult a workshop to have the area of the windshield on the inside of the camera'scasing cleaned. An authorized Volvo workshop is recommended.
Bright sunlight No action. The camera/radar sensor will reset automatically when lighting conditionsimprove.
NOTE
Keep the windshield in front of the camera and radar unit clean.
High temperaturesIf the temperature in the passenger compartment is very high, the camera/radar sensor will switchoff temporarily for approx. 15 minutes after theengine is started to protect its electronic compo-nents. When the temperature has cooled suffi-ciently, the camera/radar sensor will automati-cally restart.
Damaged windshield
CAUTION
If there are cracks, scratches or stone chips on the windshield in front of any of the cam-era and radar unit "windows" and this coversan area of about 0.5 × 3.0 mm(0.02 × 0.12 in.) or more, contact a workshopto have the windshield replaced – an author-ized Volvo workshop is recommended. Failure to take action could result in reduced performance for the driver support systemsthat use the camera and radar unit.
It could cause functions to be reduced, deac- tivated completely or produce an incorrectfunction response. To avoid the risk of loss of function, malfunc- tion or reduced function of the driver supportsystems that use the radar unit, the followingalso apply:
• Volvo advises
against repairing cracks,
scratches or stone chips in the area infront of the camera and radar unit – theentire windshield should instead bereplaced.
• Before replacing the windshield, contactan authorized Volvo workshop to verify

DRIVER SUPPORT
323
that the right windshield has been ordered and installed.
• The same type of windshield wipers orwipers approved by Volvo should be usedfor replacement.
CAUTION
If the windshield is replaced, the camera and radar unit must be recalibrated by a workshopto help ensure proper functioning of all of thevehicle's camera and radar-based systems –an authorized Volvo workshop is recom-mended.
Related information
• Camera (p. 320)

DRIVER SUPPORT
324
Recommended maintenance for thecamera/radar sensor
In order for the camera/radar sensor to function properly, the area of the windshield in front of theunit must be kept free of dirt, ice, snow, etc. andshould be washed regularly with water and carwashing detergent.
NOTE
Dirt, ice and snow covering the camera and radar 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. 320)
City Safety
™
City Safety can alert the driver with light, sound and 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 sensor 71
.
City Safety can help prevent a collision or lower the vehicle's speed at the point of impact. City Safety is an aid intended to assist the driver if a collision with a pedestrian, large animal,cyclist or vehicle is imminent. City Safety can help the driver avoid a collision when 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 automatically applying 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 an attempt to stop your vehicle immediately behindthe vehicle or object ahead. City Safety is activated in situations in which the driver 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 as possible to help avoid unnecessary intervention. Normally, the occupants of the vehicle will not be aware of City Safety except when the systemintervenes when a collision is imminent.
71
Note: This illustration is general and details may vary depending on model.

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325
WARNING
•The City Safety function is supplementary driver 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 sections in 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. 325)
• Setting a warning distance for City Safety(p. 327)
• Detecting obstacles with City Safety (p. 328)
• City Safety in crossing traffic (p. 330)
• Limitations of City Safety in crossing traffic(p. 331)
• City Safety and delayed evasive maneuvers(p. 332)
• City Safety limitations (p. 333)
• City Safety messages (p. 335)
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 the speeds 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 a vehicle ahead by reducing your vehicle's speedby up to 60 km/h (37 mph).
Cyclists
City Safety can help prevent a collision with a cyclist ahead by reducing your vehicle's speed byup to 50 km/h (30 mph).
Pedestrians
City Safety can help prevent a collision with a pedestrian 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 primarily intended 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 overview72
.
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-brakeDescriptions of what happens in these three steps are provided below.
1 - Collision warning
The driver is first alerted to the risk of an immi- nent collision. City Safety can detect pedestrians, cyclists or vehicles 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.
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 the driver is exerting on the brake pedal is insufficientto prevent the collision, brake support willincrease pressure.
72
Note: This illustration is general and details may vary depending on model.

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327
3 - Auto-brake
The automatic braking function is activated at the last moment. If the driver has not taken evasive action by this stage 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 along with the automatic braking function. See "Seatbelt tensioners" for more information. In certain situations, auto-braking may begin with a 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 the driver presses hard on the accelerator pedal.
NOTE
When City Safety activates the brakes, the brake 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 how the driver operates the vehicle. The drivermust not only rely on City Safety to brake thevehicle.
Related information
•City Safety
™ (p. 324)
Setting a warning distance for CitySafety
City Safety is always active, but the function's warning 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 of the system and regulates the distance at whichthe light, sound and brake pulsations will be acti-vated. To select warning distance:
1. Select
SettingsMy CarIntelliSafe in
the center display's Top view.
2. Under
City Safety Warning, tap Late,Normal or Early to set the desired warning
distance.
If the driver feels that the
Early setting is giving
too many warnings or finds them irritating, the
Normal or Late warning distance settings can
be 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.

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DRIVER SUPPORT
328The
Late warning distance setting should there-
fore only be used in exceptional cases, such as when a more dynamic driving style is preferred.
WARNING
• No automatic system can guarantee 100% correct function in all situations.You should therefore never test use ofCity Safety in the direction of people, ani-mals or vehicles – this could lead tosevere damage, serious personal injury oreven death.
• City Safety warns the driver if there is arisk of collision, but the function cannotreduce the driver's reaction time.
• Even if the warning distance has been set to
Early, warnings may be perceived as
late in certain situations – e.g. when there are large speed differences or if the vehi-cle ahead suddenly brakes heavily.
• With the warning distance set to
Early,
warnings come further in advance. This may cause the warnings to come morefrequently than with warning distance
Normal, but is recommended since it can
make City Safety more effective.
NOTE
The warning with direction indicators for Rear Collision Warning is deactivated if the colli-sion warning distance in the City Safety func- tion is set to the lowest level "
Late".
The seat belt tensioning and braking func- tions remain active.
Related information
• City Safety
™ (p. 324)
Detecting obstacles with City Safety City Safety can detect vehicles, cyclists, large animals and pedestrians.
VehiclesCity Safety detects most types of vehicles that are either stationary, moving in the same direc-tion as your vehicle or those described in "CitySafety in crossing traffic". For City Safety to be able to detect a vehicle in the dark, its headlights and taillights must be onand clearly visible.
Cyclists
Optimal examples of what City Safety would interpret to be a cyclist: clear body and bicycle shapes.
For optimal performance, the system's function for cyclist detection needs the clearest possibleinformation about the contours of the bicycle andof the cyclist's head, arm, shoulders, legs, torso