wheel VOLVO S90 TWIN ENGINE 2020 Manual Online

DRIVER SUPPORT
* Option/accessory.291
NOTE
Note that the Pilot Assist function only works when the driver's hands are on thesteering wheel.
Additional markings in the instrument panel
Pilot Assist will only regulate the time interval to the vehi-cle ahead when the distancesymbol shows a vehicle (1)over the steering wheel sym-bol.
Pilot Assist's steering assistance is only activewhen the steering wheel symbol (2) changesfrom GRAY to GREEN.
A speed interval will be marked at the same time. The higher speed is the stored speed for your vehicleand the lower speed is thespeed of the vehicle ahead
(target vehicle).
Related information
Pilot Assist
* (p. 287)
Deactivating Pilot Assist
* (p. 291)
Pilot Assist
* limitations (p. 293)
Deactivating Pilot Assist *37
Pilot Assist can be deactivated and switched off.
1. Press the button on the steering
wheel (2).
> The symbol and markings turn gray – Pilot Assist goes into standby mode. The time interval indicator light and anysymbols for the target vehicle will goout.
2. Press the ◀ (1) or ▶ (3) buttons on the
steering wheel to select another function.
> The Pilot Assist symbol and marking (4) in the instrument panel will go out and the stored maximum speed will beerased.
WARNING
With Pilot Assist in standby mode, the driver must intervene and steer andregulate both speed and distance tothe vehicle ahead.
If the vehicle comes too close to a vehi-cle ahead when Pilot Assist is instandby mode, the driver is insteadwarned of the short distance by the Distance Alert
* function.
Related information
Adaptive Cruise Control
* (p. 278)
Selecting and activating Adaptive CruiseControl
* (p. 280)
Switching between cruise control andAdaptive Cruise Control
* in the center dis-
play (p. 284)
Adaptive Cruise Control
* limitations
(p. 283)
Temporarily deactivating steering assis-tance with Pilot Assist
* (p. 293)
37
Depending on market, this function can be either standard or optional.

DRIVER SUPPORT
* Option/accessory.
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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.293
Temporarily deactivating steering assistance with Pilot Assist *40
Pilot Assist steering assistance can be tem- porarily deactivated and reactivated withoutprior warning.
When the turn signals are used, Pilot Assist's steering assistance will be temporarily deacti-vated. When the turn signal is switched off,steering assistance will be automatically reac-tivated if the traffic lane's side markings canstill be detected. If Pilot Assist cannot clearly interpret the lane's side marker lines or if the camera/radarsensor is unable for some other reason toclearly interpret the lane, Pilot Assist will tem-porarily deactivate steering assistance. How-ever, the speed and distance warnings willremain active. Steering assistance will resumewhen the side marker lines can once again beinterpreted. In these situations, the driver maybe alerted through slight vibrations in thesteering wheel that steering assistance is tem-porarily deactivated.
Related information
Pilot Assist
* (p. 287)
Selecting and activating Pilot Assist
*
(p. 290)
Deactivating Pilot Assist
* (p. 291)
Pilot Assist
* limitations (p. 293)
Pilot Assist *41
limitations
Pilot Assist functionality may be reduced in certain situations.
Pilot Assist is a driver support function designed to simplify driving and assist thedriver in many situations. However, the driveris always responsible for maintaining a suita-ble distance to vehicles or objects around itand ensuring that the vehicle is correctly posi-tioned in the traffic lane.
WARNING
In some situations, Pilot Assist may have trouble helping the driver properly or maybe deactivated automatically – we adviseagainst using Pilot Assist in such cases.Examples of such situations include:
the lane markings are worn, missing or cross each other.
lane division is unclear, for example,when the lanes divide or merge or atexits or when there are multiple sets ofmarkings.
edges or other lines than lane markingsare present on or near the road, e.g.curbs, joints or repairs to the road sur-face, edges of barriers, roadside edgesor strong shadows.
the lane is narrow or winding.
the lane contains ridges or holes.
weather conditions are poor, e.g. rain,snow or fog or slush or reduced visibil-ity with poor light conditions, back-lighting, wet road surface, etc.
The driver should also note that Pilot Assist has the following limitations:
High curbs, roadside barriers, tempo- rary obstacles (traffic cones, safety bar-riers, etc.) are not detected. Alterna-
40
Depending on market, this function can be either standard or optional.

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DRIVER SUPPORT
* Option/accessory.
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tively, they may be detected incorrectly as lane markings, with a subsequentrisk of contact between the vehicle andsuch obstacles. The driver is responsi-ble for ensuring that the vehicle main-tains a suitable distance from suchobstacles.
The camera and radar sensors do nothave the capacity to detect all oncom-ing objects and obstacles in trafficenvironments, e.g. potholes, stationaryobstacles or objects that completely orpartially block the route.
Pilot Assist does not "see" pedestrians,animals, etc.
The recommended steering input islimited in force, which means that itcannot always help the driver to steerand keep the vehicle within the lane.
In vehicles equipped with Sensus Navigation
*, the function is able to use
information from map data, which could cause variations in performance.
Pilot Assist will be switched off if thespeed-dependent power steeringwheel resistance is working at reducedpower, e.g. during cooling due to over-heating.WARNING
Pilot Assist should only be used if there are clear lane lines painted on each side of thelane. All other use will increase the risk ofcontact with nearby obstacles that cannotbe detected by the functions.
WARNING
This is not a collision avoidance sys- tem. The driver is always responsibleand must intervene if the system failsto detect a vehicle ahead.
The function does not brake for peopleor animals and does not brake for smallvehicles, such as bikes and motorcy-cles. Similarly, it does not brake for lowtrailers, oncoming, slow-moving or sta-tionary vehicles and objects.
Do not use the function in demandingsituations, such as in city traffic, atintersections, on slippery surfaces,with a lot of water or slush on the road,in heavy rain/snow, in poor visibility, onwinding roads, or on on/off ramps.
The driver can always correct or adjust steer-ing assistance provided by Pilot Assist by turn-ing the steering wheel to the desired position.
Steep roads and/or heavy loadsPilot Assist is primarily intended to be drivenon flat roads. The function may not be able tomaintain the correct time interval to the vehi-cle ahead when driving down steep hills. Thedriver should be extra attentive and preparedto apply the brakes.
Other limitationsThe Off Road drive mode cannot be selected
when Pilot Assist is activated.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information
Pilot Assist
* (p. 287)
Camera/radar sensor limitations (p. 309)
Speed-dependent steering wheel resis- tance (p. 268)
Drive modes (p. 419)
41
Depending on market, this function can be either standard or optional.

DRIVER SUPPORT
* Option/accessory.
298
Adjusting set speed for driver support
It is possible to adjust set speeds for the Adaptive Cruise Control * and Pilot Assist *
functions.
: Increases the set speed.
: Reduces the set speed.
Set speed.
–Change a set speed by pressing the
(1) or (2) buttons briefly or by pressing
and holding them:
Brief
press: Each press changes the
speed in +/- 5 km/h (+/- 5 mph) incre- ments.
Press
and hold: Release the button
when the set speed indicator (3) hasmoved to the desired speed.
NOTE
For vehicles without Adaptive Cruise Con- trol *, speed instead increases by +/- 1km/h
(+/- 1 mph) each time the button is pressed.
The most recently set speed will be stored.
If speed is increased by depressing the accel- erator pedal while pressing the
(1) button
on the steering wheel, the vehicle's speed when the button is pressed will be stored as the set speed. Temporarily increasing speed using the accel- erator pedal, e.g. when passing another vehi-cle, will not affect the setting. The vehicle willreturn to the set speed when the acceleratorpedal is released.
Automatic transmission
The driver support functions can follow another vehicle at speeds from a standstill upto 200 km/h (125 mph). Pilot Assist can provide steering assistance from near-stationary speeds up to 140 km/h(87 mph). The lowest speed that can be set is 30 km/h (20 mph). When following another vehicle,ACC can monitor that vehicle's speed andslow your own vehicle down to a standstill,but it is not possible to set speeds lower than30 km/h (20 mph).
Related information
Driver support systems (p. 268)
Cruise control (p. 275)
Adaptive Cruise Control
* (p. 278)
Pilot Assist
* (p. 287)

DRIVER SUPPORT
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* Option/accessory.299
Setting time interval to the vehicle ahead The time interval to the vehicle ahead can be set for the functions Adaptive Cruise Control *,
Pilot Assist * and Distance Alert *.
Different time intervals to the vehicle ahead can be selectedand are shown in the instru-ment panel as 1–5 horizontalbars. The more bars, thelonger the time interval. Onebar represents an interval of
approx. 1 second to the vehicle ahead. 5 barsrepresents approx. 3 seconds.
NOTE
When the symbol in the instrument panel shows a vehicle and a steering wheel, PilotAssist follows a vehicle ahead at a presettime interval. When only a steering wheel is shown, there is no vehicle ahead within a reasona-ble distance.
NOTE
When the symbol in the instrument panel shows two vehicles, ACC is following thevehicle ahead at a preset time interval. When only one vehicle is shown, there is no vehicle ahead within a reasonable dis-tance.
Controls for setting a time interval.
Reduce the time interval
Increase the time interval
Distance indicator
–Press the (1) or (2) button to decrease or increase the time interval.
> The distance indicator (3) shows the current time interval. In order to help your vehicle follow the vehicle ahead as smoothly and comfortably as possi-ble, Adaptive Cruise Control allows the timeinterval to vary noticeably in certain situations.At low speeds, when the distance to the vehi-cle ahead is short, Adaptive Cruise Controlincreases the time interval slightly.
NOTE

The greater the vehicles' speed, the greater the distance between them fora set time interval.
Only use the time intervals permittedby local traffic regulations.
If driver support does not seem torespond with a speed increase whenactivated, it may be because the timeinterval to the vehicle ahead is shorterthan the set time interval.
WARNING
Only use a time interval suitable for the current traffic conditions.
The driver should be aware that shorttime intervals give them limited time toreact and act to any unforeseen trafficsituation.

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Related information
Driver support systems (p. 268)
Adaptive Cruise Control
* (p. 278)
Pilot Assist
* (p. 287)
Distance Alert
* (p. 273)
Head-up display
* (p. 139)
Auto-hold braking with driver support
The driver support functions Adaptive Cruise Control * and Pilot Assist * have a special brake
function in slow traffic and while stationary.
Braking function in slow traffic and at a standstill
In slow-moving, stop-and-go traffic or when stopped at a traffic light, driving will resumeautomatically if the vehicle is stopped for lessthan approx. 3 seconds. If it takes more than 3seconds for the vehicle ahead to begin movingagain, the driver support function will go intostandby mode and the auto-hold brake func-tion will activate.
–The function can be reactivated by:
Pressing the
button on the steer-
ing wheel keypad.
Pressing the accelerator pedal.
> The function will resume following the vehicle ahead if it begins to move within approx. 6 seconds.
WARNING
A noticeable increase in speed may follow when the speed is resumed with the
steering wheel button.
WARNING
The driver support system only issues a warning for obstacles detected by its radarsensor – thus, a warning may come after adelay or not at all.
Never wait for a warning or assistance. Apply the brakes when necessary.
NOTE
Driver support can keep the vehicle sta- tionary for no more than 5 minutes – afterthat time the parking brake is applied andthe function is deactivated. The parking brake must be released before driver support can be reactivated.

DRIVER SUPPORT
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City Safety steering assistance for evasive maneuver City Safety steering assistance can help the driver steer away from a vehicle/obstaclewhen it is not possible to avoid a collision bybraking alone. City Safety steering assistanceis always activated and cannot be switchedoff.
Your vehicle swerves away
Slow-moving/stationary vehicle or obsta- cle.
City Safety helps provide assistance bystrengthening the driver's steering move-ments, but only if the driver has begun evasiveaction and the system detects that the driver'ssteering movements are not sufficient to avoida collision. The brake system is used simultaneously to further strengthen steering movements. The function also helps stabilize the vehicle after ithas passed the obstacle. City Safety steering assistance can detect:
vehicles
cyclists
pedestrians
large animals
Related information

City Safety
™ (p. 314)
City Safety limitations (p. 324)
City Safety steering assistance limitations during evasivemaneuvers
City Safety steering assistance may have lim- ited functionality in certain situations and notintervene, e.g.:
at speeds outside the range of 50-100 km/h (30-62 mph)
if the driver does not take evasive action
if speed-dependent power steering wheelresistance is working at reduced power –e.g. during cooling due to overheating.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information
City Safety steering assistance for evasive maneuver (p. 322)
City Safety limitations (p. 324)
Speed-dependent steering wheel resis-tance (p. 268)
Camera/radar sensor limitations (p. 309)

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DRIVER SUPPORT
324
your lane must have clear side lane mark- ings
your vehicle must be positioned straight inyour lane
the oncoming vehicle must be positionedwithin your vehicle's lane markings
the oncoming vehicle's headlights mustbe on
the function can only handle “front-to-front” collisions
the function can only detect vehicles withfour wheels.
WARNING
Warnings and brake interventions due to an imminent collision with an oncomingvehicle always come very late.
Related information

City Safety
™ (p. 314)
City Safety limitations (p. 324)
City Safety limitations
City Safety 57
functionality may be reduced in
certain situations.
Surroundings
Low objects
Hanging objects, such as flags for overhang- ing loads or accessories such as auxiliarylights or front protective grids that extendbeyond the height of the hood, may limit City Safety functionality.
Slippery road conditions
The extended braking distance on slippery roads may reduce City Safety's capacity tohelp avoid a collision. In these types of situa-tions, the Anti-lock Braking System and Elec- tronic Stability Control (ESC 58
) are designed
for optimal braking power with maintained stability.
Backlighting
The visual warning signal in the windshield may be difficult to detect in bright sunlight, ifthere are reflections, or if the driver is wearingsunglasses or not looking straight ahead.
Heat
If the temperature in the passenger compart- ment is high due to e.g. bright sunlight, thevisual warning signal in the windshield may betemporarily disabled.
Camera and radar sensor's field of vision
The camera's field of vision is limited and in certain situations, it may be unable to detectpedestrians, large animals, cyclists or vehicles,or it may detect them later than expected. Vehicles that are dirty may be detected later than clean vehicles, and in dark conditions,motorcycles may be detected late or not at all. If a text message displayed in the instrument panel indicates that the camera/radar sensoris obstructed, it may be difficult for City Safetyto detect pedestrians, large animals, cyclists,vehicles or lane markings in front of the vehi-cle. City Safety functionality may therefore bereduced. Text messages may not be displayed for all sit- uations in which the windshield sensors areblocked. The driver must therefore alwayskeep the windshield in front of the camera/radar sensor clean.
CAUTION
Only a workshop may perform mainte- nance on driver support components – anauthorized Volvo workshop is recom-mended.
57 This function is not available on all markets.
58 Electronic Stability Control

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City Safety messages
A number of messages related to City Safety may be displayed in the instrument panel.Several examples are provided below.
Message Meaning
City Safety Automatic interventionWhen City Safety is braking or has activated the automatic braking function, one or more symbols may illuminate in the instrument panel and a text message may be displayed.
City Safety Reduced functionality Service requiredThe system is not functioning as intended. Contact a workshop A
.
A An authorized Volvo workshop is recommended.
A text message can be erased by briefly press- ing the
button in the center of the right-
side steering wheel keypad. If a message cannot be erased, contact a workshop A
.
Related information
City Safety
™ (p. 314)