engine VOLVO S90 TWIN ENGINE 2020 Workshop Manual

DRIVER SUPPORT
* Option/accessory.
292
Pilot Assist *38
standby mode
Pilot Assist can be deactivated and put in standby mode. This may happen automati-cally or be due to driver intervention.
Standby mode means that the function is selected in the instrument panel but not acti-vated. In standby mode, Pilot Assist will notregulate the speed or distance to the vehicleahead or provide steering assistance.
Standby mode due to action by the
driver
Pilot Assist will be deactivated and put instandby mode if any of the following occurs:
The brakes are applied.
The gear selector is moved to
N.
A turn signal is used for more than1 minute.
The vehicle is driven faster than the setspeed for more than 1 minute.
Automatic standby modePilot Assist is dependent on other systems, such as Electronic Stability Control (ESC 39
). If
any of these other systems stops working, Pilot Assist will be automatically deactivated.
WARNING
With automatic standby mode, the driver is warned by an acoustic signal and a mes-sage on the instrument panel.
The driver must then regulate vehicle speed, apply the brakes if necessary,and maintain a safe distance to othervehicles.
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 steering wheel.
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 snow or heavy rain (the camera lens/radarwaves are blocked).
your vehicle's speed goes under 5 km/h(3 mph) and Pilot Assist cannot determineif the 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 sothat Pilot Assist no longer has a vehicle tofollow.
Related information

Pilot Assist
* (p. 287)
Selecting and activating Pilot Assist
*
(p. 290)
Deactivating Pilot Assist
* (p. 291)
Pilot Assist
* limitations (p. 293)
38
Depending on market, this function can be either standard or optional.
39 Electronic Stability Control

DRIVER SUPPORT
* Option/accessory.301
Deactivation of the Auto-hold brake function
In certain situations, auto-hold will be deacti- vated when the vehicle is at a standstill andthe function will go into standby mode. Thismeans that the brakes will be released and thevehicle could begin to roll. The driver mustactively apply the brakes to keep the vehiclestationary. 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 R
positions
the driver puts the function in standby mode.
Auto Activate Parking BrakeIn certain situations, the parking brake will beapplied to keep the vehicle at a standstill. This occurs if the function is keeping the vehi- cle stationary using the brakes and:
the driver opens the door or unbuckleshis/her seat belt
the function has kept the vehicle at astandstill for more than approx. 5 minutes
the brakes overheat
the driver switches off the engine man-ually.
Related information
Driver support systems (p. 268)
Adaptive Cruise Control
* (p. 278)
Pilot Assist
* (p. 287)
Brake functions (p. 403)
Drive mode for driver support The driver can choose different drive modes to determine how driver support shouldmaintain a time interval to the vehicle ahead.
Settings are made using the
DRIVE MODE
controls. Select one of the following:

Pure - Driver support will focus on provid-
ing good fuel economy, which will increase the time interval to the vehicleahead.

Hybrid - Driver support will focus on fol-
lowing the set time interval to the vehicle ahead as smoothly as possible.

Power - Driver support will focus on fol-
lowing the set time interval to the vehicle ahead more exactly, which could meanfaster acceleration and heavier braking.
Related information
Driver support systems (p. 268)
Drive modes (p. 419)
Setting time interval to the vehicle ahead(p. 299)

DRIVER SUPPORT
* Option/accessory.303
Activating or deactivating Curve Speed Assist (CSA) *
The Curve Speed Assist (CSA) function can be activated as a supplement to Adaptive Cruise Control * or Pilot Assist *. The driver can
also deactivate the function.
Activate or deactivate the function using this button inthe center display's Functionview.
GREEN button indicator light – the func- tion is activated.
GRAY button indicator light – the functionis deactivated.
The next time the engine is started, the lastused setting is reactivated or the key's driver profile settings are followed 45
.
Related information
Curve Speed Assist (CSA)
* (p. 302)
Curve Speed Assist (CSA)
* limitations
(p. 303)
Curve Speed Assist (CSA) *
limitations
Curve Speed Assist (CSA) functionality may be reduced in certain situations. This functionis only available on some markets.
The driver should be aware of the following limitations:
Curve Speed Assist (CSA) may have lim-ited performance on small roads and indensely populated areas.
At off-ramps or intersections, CurveSpeed Assist (CSA) may temporarilyswitch off.
If the satellite navigator's 46
map data is
not updated, Curve Speed Assist (CSA)may have limited functionality.
Curve Speed Assist (CSA) functionality may be limited if the satellite navigator 46
has lost contact with the satellite system.
On new or rebuilt roads, map data may be incorrect.
The risk of reduced grip due to adverseweather or road conditions is not takeninto account when calculating suitablecornering speed.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information

Curve Speed Assist (CSA)
* (p. 302)
Camera/radar sensor limitations (p. 309)
45
These alternatives are market dependent.
46 Only with Volvo Sensus Navigation * installed.

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DRIVER SUPPORT
310
CauseAction
Water or snow is spraying/swirling up and blocking the radar signals or the 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 cam-era/radar sensor. 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.
Bright sunlight. No action. The camera/radar sensor will reset automatically when lighting con-ditions improve.
High temperatures
If the temperature in the passenger compart- ment is very high, the camera/radar sensorwill switch off temporarily forapprox. 15 minutes after the engine is startedto protect its electronic components. Whenthe temperature has cooled sufficiently, thecamera/radar sensor will automatically restart.
Damaged windshield
NOTE
Failure to take action could result in reduced performance for the driver supportsystems that use the camera and radarunit. It could cause functions to bereduced, deactivated completely or to pro-duce an incorrect function response.
To avoid the risk of malfunction of the driver support systems that use the radar sensor, thefollowing also apply:
If there are cracks, scratches or stonechips on the windshield in front of any ofthe camera and radar sensor "windows"and this covers an area ofabout 0.5 × 3.0 mm (0.02 × 0.12 in.) ormore, contact a workshop to have the windshield replaced 50
.
Volvo advises
against repairing cracks,
scratches or stone chips in the area in front of the camera and radar sensor – theentire windshield should instead bereplaced.
Before replacing the windshield, contact a workshop 50
to verify that the right wind-
shield has been ordered and installed.
The same type of windshield wipers or wipers approved by Volvo should be usedfor replacement.
If the windshield is replaced, the cameraand radar sensor must be recalibrated by a workshop 50
to help ensure proper func-
tioning of all of the vehicle's camera and radar-based systems.
Radar
Vehicle speed
The radar sensor's ability to detect a vehicle ahead is significantly reduced if the speed ofthe vehicle ahead differs greatly from yourvehicle's speed.
50 An authorized Volvo workshop is recommended.

DRIVER SUPPORT
}}
* Option/accessory.317
Related information
City Safety
™ (p. 314)
City Safety in crossing traffic (p. 320)
City Safety braking for oncoming vehicles (p. 323)
City Safety limitations (p. 324)
Head-up display
* (p. 139)
Seat belt tensioners (p. 50)
Setting a warning distance for City Safety
City Safety 53
is always active, but the func-
tion's warning distance can be adjusted.
NOTE
The City Safety function cannot be deacti- vated. It is activated automatically eachtime the engine/electric motor is started.
The alert distance determines the sensitivity of the system and regulates the distance atwhich the light, sound and brake pulsationswill be activated. To select warning distance:
1. Select
SettingsMy CarIntelliSafein the center display's Top view.
2. Under
City Safety Warning, tap Late,Normal or Early to set the desired warn-
ing distance.
If the driver feels that the
Early setting is giv-
ing 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 distancecan be reduced. This will reduce the total number of warnings, but it will also result inCity Safety providing warnings at a later stage. The
Late warning distance setting should
therefore only be used in exceptional cases, such as when a more dynamic driving style ispreferred.
53 This function is not available on all markets.

DRIVER SUPPORT
* Option/accessory.
328
Rear Collision Warning *59
The Rear Collision Warning 60
(RCW) function
can help the driver avoid rear-end collisions from vehicles approaching from behind.
The function can alert drivers of following vehi- cles of the risk of a collision by rapidly flashingthe turn signals. If, at a speed below 30 km/h (20 mph), the function detects that the vehicle is in dangerof being hit from behind, the seat belt tension-ers may tension the front seat belts. TheWhiplash Protection System will also be acti-vated in a collision. Immediately before a collision from behind, the function may also activate the brakes inorder to reduce the forward acceleration of thevehicle during the collision. However, thebrakes will only be applied if your vehicle isstationary. The brakes will be immediatelyreleased if the accelerator pedal is depressed. The function is automatically activated each time the engine is started.
WARNING
The function is supplementary driver support intended to facilitate drivingand help make it safer – it cannot han-dle all situations in all traffic, weatherand road conditions.
The driver is advised to read all sec-tions in the Owner's Manual about thisfunction to learn of its limitations,which the driver must be aware ofbefore using the function.
Driver support functions are not a sub-stitute for the driver's attention andjudgment. The driver is always respon-sible for ensuring the vehicle is drivenin a safe manner, at the appropriatespeed, with an appropriate distance toother vehicles, and in accordance withcurrent traffic rules and regulations.
Related information
Driver support systems (p. 268)
Rear Collision Warning
* limitations
(p. 328)
Whiplash Protection System (p. 46)
Rear Collision Warning
*61
limitations
In some situations, it may be difficult for Rear Collision Warning (RCW) to warn the driverof a collision risk.
This may be the case if: the vehicle approaching from the rear is detected at a late stage
the vehicle approaching from the rearchanges lanes at a late stage
NOTE
In certain markets RCW does
not warn
with the direction indicators due to local traffic regulations – in such cases, that partof the function is deactivated.
NOTE
The warning with direction indicators for Rear Collision Warning * is deactivated if
the collision warning distance in the City Safety function is set to the lowest level "
Late".
The seat belt tensioning and braking func- tions remain active.
59 Warning of collision from the rear.
60 This function is not available on all markets.
61 Warning of collision from the rear.

||
DRIVER SUPPORT
* Option/accessory.
330 If a passing vehicle's speed is more than 15 km/h (9 mph) faster than your vehicle, BLISwill not react.
NOTE
The light illuminates on the side of the vehicle where the system has detected thevehicle. If the vehicle is passed on bothsides simultaneously, both lights come on.
WARNING

The function is supplementary driver support intended to facilitate drivingand help make it safer – it cannot han-dle all situations in all traffic, weatherand road conditions.
The driver is advised to read all sec-tions in the Owner's Manual about thisfunction to learn of its limitations,which the driver must be aware ofbefore using the function.
Driver support functions are not a sub-stitute for the driver's attention andjudgment. The driver is always respon-sible for ensuring the vehicle is drivenin a safe manner, at the appropriatespeed, with an appropriate distance toother vehicles, and in accordance withcurrent traffic rules and regulations.
Related information
Driver support systems (p. 268)
Activating or deactivating BLIS (p. 330)
BLIS limitations (p. 331)
BLIS messages (p. 332)
Activating or deactivating BLIS
The BLIS 63
function can be activated or deac-
tivated.
Activate or deactivate the function using this button inthe center display's Functionview.
GREEN button indicator light – the func- tion is activated.
GRAY button indicator light – the functionis deactivated.
If BLIS is activated when the engine is started,the indicator lights in the rearview mirrors willflash once. If BLIS is deactivated when the engine is turned off, it will remain off the next time theengine is started and the indicator lights willnot illuminate.
Related information
BLIS
* (p. 329)
BLIS limitations (p. 331)
63
Blind Spot Information

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DRIVER SUPPORT
* Option/accessory.
334
Related information
Driver support systems (p. 268)
Activating or deactivating Cross Traffic Alert
* (p. 334)
Cross Traffic Alert
* limitations (p. 334)
Cross Traffic Alert
* messages (p. 336)
BLIS
* (p. 329)
Park Assist
* (p. 357)
Activating or deactivating Cross Traffic Alert *69
The driver can select to switch off the warn-
ing in the function Cross Traffic Alert (CTA) –
the sub-function auto brake cannot be
switched off and continues to be active.
Activate or deactivate the function using this button inthe center display's Functionview.
GREEN button indicator light – the func- tion is activated.
GRAY button indication – warning signaland indication on display for the functionis deactivated.
The function is automatically activated eachtime the engine is started.
Related information
Cross Traffic Alert
* (p. 333)
Cross Traffic Alert
* limitations (p. 334)
Cross Traffic Alert *70
limitations
The Cross Traffic Alert (CTA) function with auto brake may have limited functionality in
certain situations. Auto-brake is active atspeeds under 15 km/h (9.3 mph).
WARNING
The auto-brake sub-function can only
detect and apply the brakes for other mov- ing vehicles – not for e.g. stationary obsta-
cles, cyclists or pedestrians.
CTA has certain limitations – The CTA sen- sors, for example, cannot "see" through otherparked vehicles or objects blocking the vehi-cle. Below are a few examples of situations in which CTA's field of vision may be initially lim-ited and approaching vehicles may thereforenot be detected until they are very close toyour vehicle:
69 Warning for crossing traffic when the vehicle is backing up.
70 Warning for crossing traffic when the vehicle is backing up.

DRIVER SUPPORT
* Option/accessory.
352
Activating or deactivating steering assistance during collision risks
The steering assistance function is optional – the driver can choose to have it activated ordeactivated.
Activate or deactivate the function using this button inthe center display's Functionview.
GREEN button indicator light – the func- tion is activated.
GRAY button indicator light – the functionis deactivated.
The function is automatically activated each time the engine is started 91
.
NOTE
When the Collision avoidance
assistance function is deactivated, all sub-
functions of the following are deactivated:
Steering assistance at risk of run-off
Steering assistance at risk of head-on collision
Steering assistance during collision risks from behind
*
Although it is possible to deactivate the function, the driver is advised to keep itactivated since it can help improve drivingsafety in most cases.
Related information
Steering assistance at risk of collision (p. 351)
Steering assistance during collision riskslimitations (p. 355)
Run-Off Mitigation with steering assistance
Steering assistance has several sub-func- tions. Run-Off Mitigation with steering assis-tance can help the driver and reduce the riskof the vehicle inadvertently running off theroad by actively steering the vehicle backonto the road.
This function has two activation levels for intervention: Steering assistance only
Steering assistance with braking
Steering assistance only
Intervention with steering assistance.
91
On some markets, the setting that was active when the engine was switched off is reactivated.

DRIVER SUPPORT
* Option/accessory.
358
Park Assist front, rear and sides *
Park Assist behaves differently depending on which part of the vehicle is approaching anobstacle.
Front camera
The warning signal has a continuous tone when the obstacle is less than approx. 30 cm (1 ft) from thevehicle.
The Park Assist system's front sensors are automatically activated when the engine isstarted. They are active at speedsbelow 10 km/h (6 mph). The distance monitored extends approx. 80 cm (2.5 ft) in front of the vehicle.
NOTE
The Park Assist system is deactivated when the parking brake is used or when P
is selected on vehicles with automatictransmission.
CAUTION
When installing auxiliary lights: Make sure these do not obscure the sensors – theauxiliary lights could be perceived as anobstacle.
Back
The warning signal has a continuous tone when the obstacle is less than approx. 30 cm (1 ft) from thevehicle.
The rear sensors will be activated if the vehicle begins rolling backward or if reverse gear isengaged. The distance monitored extends approx. 1.5 meters (5 ft) behind the vehicle.
Side sensors
The warning signal will begin pulsating rapidly when the obstacle is less than approx. 25 cm (0.8 ft) fromthe vehicle.
Park Assist's side sensors are automatically activated when the engine is started. They areactive at speeds below 10 km/h (6 mph). The distance monitored is approx. 25 cm (0.8 ft) out from the sides. The detection area of the side sensors increa- ses significantly, however, when the steering angle of the front wheel increases and depending on the position of the steeringwheel, obstacles up to approx. 90 cm (3 ft)