2019 VOLVO S90 TWIN ENGINE tow
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DRIVER SUPPORT
* Option/accessory.301
To reactivate ACC from standby mode:
–Press the button on the steering wheel(1).
> Speed will be set to the most recentlystored speed.
WARNING
A noticeable increase in speed may follow
when the speed is resumed with the steering wheel button.
Related information
Adaptive Cruise Control* (p. 292)
Passing assistance with AdaptiveCruise Control
Adaptive Cruise Control (ACC43) can assist thedriver when passing other vehicles.
How passing assistance works
When ACC is following another vehicle and youindicate that you intend to pass that vehicle by
using the turn signal44, Adaptive Cruise Controlwill begin accelerating toward the vehicle aheadbefore your vehicle has moved into the passinglane.
The function will then delay a speed reduction toavoid early braking as your vehicle approaches aslower-moving vehicle.
The function remains active until your vehicle haspassed the other vehicle.
WARNING
Please note that this function can be acti-vated in more situations than just passinganother vehicle, such as when a direction indi-cator is used to indicate a lane change orbefore exiting to another road – the vehiclewill then briefly accelerate.
Related information
Adaptive Cruise Control* (p. 292)
Starting passing assistance with AdaptiveCruise Control (p. 302)
Limitations of passing assistance with Adap-tive Cruise Control (p. 302)
43Adaptive Cruise Control44Only the left-hand turn signal for left-hand drive vehicles, or right-hand turn signal for right-hand drive vehicles.
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This occurs if Adaptive Cruise Control is keepingthe vehicle stationary using the brakes and:
the driver opens the door or unbuckleshis/her seat belt
ACC has kept the vehicle at a standstill formore than approx. 5 minutes
the brakes overheat
the driver switches off the engine manually.
Related information
Adaptive Cruise Control* (p. 292)
Adaptive Cruise Control limitations
Adaptive Cruise Control (ACC48) may have lim-ited functionality in certain situations.
Steep roads and/or heavy loads
Adaptive Cruise Control is primarily intended tobe driven on flat roads. The function may not beable to maintain the correct time interval to thevehicle ahead when driving down steep hills. Thedriver should be extra attentive and prepared toapply the brakes.
Do not use Adaptive Cruise Control if thevehicle is carrying a heavy load or towing atrailer.
Other limitations
The Off Road drive mode cannot beselected if Adaptive Cruise Control is acti-vated.
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
Adaptive Cruise Control* (p. 292)
Camera limitations (p. 330)
Radar sensor limitations (p. 325)
48Adaptive Cruise Control
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When the vehicle is approaching an off-rampor a fork in the road, the driver should steertoward the desired lane to indicate to PilotAssist the desired direction of travel.
Pilot Assist strives to keep the vehicle
in the center of the lane
When Pilot Assist provides steering assistance, itstrives to position the vehicle in the center of thelane between the lane markings. For the smooth-est driving experience possible, the driver shouldpermit the vehicle to find the optimal positioning.The driver should check that the vehicle is posi-tioned safely in the lane and can always adjustthe vehicle's position by applying more force tothe steering wheel.
If Pilot Assist does not position the vehicleappropriately in the lane, the driver shouldturn off Pilot Assist or switch to AdaptiveCruise Control.
Overview
Controls
Function buttons and symbols52.
: Activates Pilot Assist from standbymode and resumes the set speed and timeinterval
: Increases the set speed
: From standby mode - activates PilotAssist and sets the current speed
: From active mode - deactivates/putsPilot Assist in standby mode
◀: Switches from Pilot Assist to AdaptiveCruise Control
: Reduces the set speed
Increases the time interval to the vehicleahead
▶: Switches from Adaptive Cruise Control toPilot Assist
Reduces the time interval to the vehicleahead
Function symbol
Symbols for target vehicle and distance tothe vehicle ahead
Symbol for activated/deactivated steeringassistance
52Note: This illustration is general and details may vary depending on model.
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WARNING
A noticeable increase in speed may follow
when the speed is resumed with the steering wheel button.
Related information
Pilot Assist (p. 308)
Passing assistance with Pilot Assist
Pilot Assist can assist the driver when passingother vehicles.
How passing assistance works
When Pilot Assist is following another vehicleand you indicate that you intend to pass that
vehicle by using the turn signal57, Pilot Assist willbegin accelerating toward the vehicle aheadbefore your vehicle has moved into the passinglane.
The function will then delay a speed reduction toavoid early braking as your vehicle approaches aslower-moving vehicle.
The function remains active until your vehicle haspassed the other vehicle.
WARNING
Please note that this function can be acti-vated in more situations than just passinganother vehicle, such as when a direction indi-cator is used to indicate a lane change orbefore exiting to another road – the vehiclewill then briefly accelerate.
Related information
Pilot Assist (p. 308)
Starting passing assistance with Pilot Assist(p. 319)
Passing assistance with Pilot Assist limita-tions (p. 319)
57Only the left-hand turn signal for left-hand drive vehicles, or right-hand turn signal for right-hand drive vehicles.
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DRIVER SUPPORT
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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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CauseAction
Water or snow is spraying/swirling up and blocking the radar signals orthe camera's range of visibility.No action. Very wet or snow-covered roads may sometimes prevent the cam-era/radar sensor from functioning.
There is dirt between the inside of the windshield and the camera/radarsensor.Consult a workshop to have the area of the windshield on the inside of the cam-era's casing cleaned. An authorized Volvo workshop is recommended.
NOTE
Keep the windshield in front of the cameraand radar unit clean.
Vehicle speed
The radar sensor's ability to detect a vehicleahead is significantly reduced if:
the speed of the vehicle ahead differs greatlyfrom your vehicle's speed
Limited field of vision
The radar sensor has a limited field of vision. Insome situations, it may detect a vehicle later thanexpected or not at all.
The radar sensor's field of vision.
The radar sensor's detection of vehicles veryclose to your vehicle may be delayed in cer-tain situations, e.g. if a vehicle pulls in
between your vehicle and the vehicle directlyahead.
Small vehicles, such as motorcycles, or vehi-cles that are not driving in the center of thelane may remain undetected.
In curves, the radar may detect the wrongvehicle or lose sight of a target vehicle.
Low trailers
Low trailer in the radar shadow.
Low trailers may also be difficult or even impossi-ble for the radar to detect. The driver should beextra alert when driving behind vehicles towinglow trailers when Adaptive Cruise Control or PilotAssist is activated.
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DRIVER SUPPORT
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Rear Collision Warning
The Rear Collision Warning (RCW) function canhelp the driver avoid rear-end collisions fromvehicles approaching from behind.
RCW is automatically activated each time theengine is started.
RCW can warn the driver of a potential collisionwith vehicles approaching from behind by rapidlyflashing the turn signals.
If, at a speed below 30 km/h (20 mph), the RCWfunction detects that the car is in danger of beinghit from behind, the seatbelt tensioners may ten-sion the front seatbelts and activate the WhiplashProtection System safety system.
Immediately before a collision from behind, RCWmay also activate the foot brake in order toreduce the forward acceleration of the car duringthe collision. However, the brakes will only beapplied if your vehicle is stationary. The brakeswill be immediately released if the acceleratorpedal is depressed.
Related information
Rear Collision Warning limitations (p. 346)
Whiplash Protection System (p. 46)
Rear Collision Warning limitations
In some situations, it may be difficult for RCW towarn the driver of a collision risk.
This may be the case if:
the vehicle approaching from the rear isdetected at a late stage
the vehicle approaching from the rearchanges lanes at a late stage
the vehicle approaching from the rear is mov-ing at a speed above 80 km/h (50 mph)
a trailer, bicycle holder or similar is con-nected to the vehicle's electrical system - theRCW function will then be automaticallydeactivated.
NOTE
In certain markets RCW does not warn withthe direction indicators due to local trafficregulations – in such cases, that part of thefunction is deactivated.
NOTE
The warning with direction indicators for RearCollision 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
Rear Collision Warning (p. 346)
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DRIVER SUPPORT
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Related information
BLIS* (p. 347)
BLIS limitations
BLIS73 functionality may be reduced in certainsituations.
Keep the marked area clean (on both the left and rightsides of the vehicle)74.
Examples of limitations:
Dirt, ice and snow covering the sensors mayreduce functionality and prevent the systemfrom providing warnings.
The BLIS function is automatically deacti-vated if a trailer, bicycle holder or similar isconnected to the vehicle's electrical system.
For BLIS to function optimally, bicycle hold-ers, luggage racks or similar should not bemounted on the vehicle's towbar.
WARNING
BLIS does not work in sharp curves.
BLIS does not work when the vehicle isbeing reversed.
Related information
BLIS* (p. 347)
71Blind Spot Information72Note: This illustration is general and details may vary depending on model.73Blind Spot Information74Note: This illustration is general and details may vary depending on model.