power steering VOLVO S90 TWIN ENGINE 2020 Owner's Manual

CLIMATE CONTROL
* Option/accessory.211
displayed. The screen locks automatically after a period of inactivity.
Related information

Climate (p. 198)
Activating and deactivating power front seats
* (p. 211)
Activating and deactivating the heatedrear seats
* (p. 212)
Activating and deactivating front seat ven-tilation
* (p. 213)
Activating and deactivating the ventilatedrear seats
* (p. 213)
Activating and deactivating the heatedsteering wheel
* (p. 214)
Activating auto climate control (p. 215)
Activating and deactivating recirculation (p. 216)
Activating and deactivating max defroster(p. 217)
Activating and deactivating the heatedrear window and door mirrors (p. 218)
Setting the blower speed for the frontseats (p. 219)
Setting the blower speed for the rearseats (p. 219)
Synchronize temperature (p. 223)
Activating and deactivating air condition-ing (p. 223)
Activating and deactivating power front seats
*
The seats can be heated for added comfort for the driver and passengers in cold weather.
1. Tap the left- or right-side steering wheel and seat button in the center display's cli- mate bar to open the controls for steeringwheel and seat heating. If the vehicle is not equipped with ventila- ted seats or heated steering wheel (for thedriver's side), the button for seat heating isdirectly accessible in the climate bar.
2. Tap the seat heating button repeatedly to
select one of the four levels: Off, High,Medium or Low.
> The level is changed and the set level is displayed in the button.
Related information
Climate system controls (p. 209)
Activating and deactivating the heated front seat
* (p. 211)
Activating and deactivating the heated front seat *
The seats can be heated for added comfort for the driver and passengers in cold weather.
Seat heating can be set to automatically acti- vate when the engine is started. When set toautomatically activate, heating will be turnedon at low ambient temperatures. 1. Tap
Settings in the Top view in the center
display.
2. Tap
Climate.
3. Select
Auto Driver Seat Heating Leveland Auto Passenger Seat Heating Levelto activate/deactivate automatic start of heated driver's and passenger seat.
> An "A" will be displayed next to the rel-
evant seat heating button in the climate bar when auto start has been activated.
4. Select
Low, Medium or High to select
level after the function has been activated.
Related information
Climate system controls (p. 209)
Activating and deactivating power front seats
* (p. 211)

DRIVER SUPPORT
* Option/accessory.
268
Driver support systems
The vehicle is equipped with a number of driver support systems that can provide thedriver with active or passive assistance in var-ious situations.
The systems can, for example, help the driver:
maintain a set speed
maintain a set time interval to the vehicle ahead
help prevent a collision by warning thedriver and applying the brakes
park the vehicle.
Some of the systems are standard and othersare options. This also varies from market tomarket.
Related information
IntelliSafe – driver support and safety(p. 29)
Speed-dependent steering wheel resis-tance (p. 268)
Curve Speed Assist (CSA)
* (p. 302)
Electronic Stability Control (p. 269)
Distance Alert
* (p. 273)
Cruise control (p. 275)
Adaptive Cruise Control
* (p. 278)
Pilot Assist
* (p. 287)
Radar sensor (p. 305)
Camera (p. 308)
City Safety
™ (p. 314)
Rear Collision Warning
* (p. 328)
BLIS
* (p. 329)
Cross Traffic Alert
* (p. 333)
Road Sign Information
* (p. 337)
Driver Alert Control (p. 342)
Lane Keeping Aid (p. 344)
Steering assistance at risk of collision(p. 351)
Park Assist
* (p. 357)
Park Assist Camera
* (p. 362)
Park Assist Pilot
* (p. 370)
Speed-dependent steering wheel resistance Speed-dependent power steering increases the steering wheel resistance in pace withthe vehicle's speed, which can help give thedriver an enhanced feeling of control and sta-bility.
Steering is stiffer on highways. When parking and at low speeds, it will be easier to movethe steering wheel.
NOTE
In rare situations, the power steering may become too hot andrequire temporary cooling – dur-ing such time the power steering
will work at reduced output and the steer-ing wheel may feel more difficult to move. The message
Power steering Assistance
temporarily reduced will be displayed
along with this symbol in the instrument panel.
While the power steering is working at reduced power, the driver support func-tions and systems with steering assistanceare not available.

DRIVER SUPPORT
}}
* Option/accessory.269
WARNING
If the temperature rises too high, the power steering may be forced to switch off com-pletely. In such a situation, the driver dis- play shows the message
Power steering
failure Stop safely along with a symbol.
Changing the level of steering wheel resistance *
In INDIVIDUAL drive mode, the level of steer- ing wheel resistance can be adjusted. 1.
Tap
Settings in the center display's Top
view.
2. Select
My CarDrive ModesSteering Force.
Steering wheel resistance settings can only be accessed if the vehicle is stationary or is mov-ing straight ahead at a low speed.
Related information
Driver support systems (p. 268)
Drive modes (p. 419)
Electronic Stability Control
The Electronic Stability Control (ESC 1
) func-
tion helps the driver avoid skidding and improves the vehicle's directional stability.
This symbol will be displayed in the instrument panel whenthe system is intervening. When the system has inter- vened to apply the brakes, apulsing sound may be heard
and the vehicle may accelerate more slowlythan expected when the accelerator pedal isdepressed.
The system consists of the following sub-func- tions:
Stability control 2
Spin control and active yaw control
Engine drag control
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.
Stability control 2This function helps control the driving andbraking force of each individual wheel in anattempt to stabilize the vehicle.
Spin control and active yaw controlThis function is active at low speeds andbrakes the wheels that are spinning to transfer
1
Electronic Stability Control
2 Also called traction control.

||
DRIVER SUPPORT
* Option/accessory.
294
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
322
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)

DRIVER SUPPORT
347
Lane Keeping Aid limitations
In certain demanding driving conditions, Lane Keeping Aid (LKA 88
) may not be able to prop-
erly assist the driver. In these situations, it is recommended that the function be deacti-vated.
Examples of such situations include:
road work
winter driving conditions
poor road surfaces
a very sporty driving style
bad weather with reduced visibility
roads with indistinct or no lane markings
sharp edges or lines other than the lane's side markings
when speed-dependent power steeringwheel resistance is working at reducedpower – e.g. during cooling due to over-heating.
The function cannot detect barriers, railings orsimilar obstacles at the side of the lane.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information
Lane Keeping Aid (p. 344)
Speed-dependent steering wheel resis- tance (p. 268)
Camera/radar sensor limitations (p. 309)
88
Lane Keeping Aid

DRIVER SUPPORT
* Option/accessory.355
Steering assistance during collision risks limitations
The function may have limited functionality in certain situations and not intervene, e.g.:
for smaller vehicles such as motorcycles
if more than half of your vehicle has moved into the adjacent lane
on roads/lanes with indistinct or no sidelane markings
outside the speed range 60-140 km/h(37-87 mph)
when speed-dependent power steeringwheel resistance is working at reducedpower – e.g. during cooling due to over-heating.
Functionality may also be reduced in other sit-uations, such as: road work
winter driving conditions
narrow roads
poor road surfaces
a very sporty driving style
bad weather with reduced visibility.
In these demanding driving conditions, the function may not be able to properly assist thedriver. In these situations, it is recommendedthat it is turned off.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information
Steering assistance at risk of collision (p. 351)
Run-Off Mitigation with steering assis-tance (p. 352)
Steering assistance during collision risksfrom oncoming traffic (p. 353)
Steering assistance during collision risks from behind
* (p. 354)

DRIVER SUPPORT
}}
* Option/accessory.375
3. Be prepared to stop the vehicle when
instructed to do so by a graphic and mes- sage in the center display. Follow theinstructions in the same way as for theparking procedure.
Note that the steering wheel can "spring"back when the procedure is completed andthe driver may need to turn the steering wheelback to the maximum position in order to pullout of the parking space. If the function determines that the driver can pull out of the parking space without any extramaneuvers, the function will be deactivated,even if it seems as though the vehicle is notcompletely out of the parking space.
Related information
Park Assist Pilot
* (p. 370)
Park Assist Pilot
* limitations (p. 375)
Park Assist Pilot * limitations
Park Assist Pilot (PAP 100
) may not be able to
detect all conditions in all situations and func- tionality may therefore be limited.
WARNING
The parking sensors have dead/blind spots where objects cannot bedetected.
Pay particular attention to people andanimals near the vehicle.
Bear in mind that the front end of thevehicle may swing out towards oncom-ing traffic during the parking maneuver.
CAUTION
Objects situated higher than the detection area of the sensors are not included whenthe parking maneuver is calculated, whichcould cause the function to swing into theparking space too early. Such parkingspaces should be avoided for this reason.
The driver should be aware of the following limitations for Park Assist Pilot:
The parking sequence is cancelledA parking sequence will be cancelled if: the driver moves the steering wheel
the vehicle's speed exceeds 7 km/h (4 mph)
the driver taps
Cancel in the center dis-
play
when the anti-lock brakes or the Elec- tronic stability control are engaged - e.g.when a wheel loses grip on a slippery road
when speed-dependent power steeringwheel resistance is working at reducedpower – e.g. during cooling due to over-heating.
A message in the center display will explainwhy the parking sequence was cancelled.
CAUTION
Under certain circumstances, the function may not be able to find parking spaces –one reason may be that the sensors aredisrupted by external sound sources thatemit the same ultrasonic frequencies thatthe system works with. Examples of such sources include horns, wet tires on asphalt, pneumatic brakes,exhaust noise from motorcycles, etc.
100 Park Assist Pilot

HYBRID INFORMATION
380
General information about Twin Engine Twin Engine vehicles are driven just like any other vehicle, but certain functions differ froma vehicle powered exclusively by gasoline.The electric motor powers the vehicle primar-ily at low speeds; the gasoline engine is usedat higher speeds or during more active driv-ing.
The instrument panel displays Twin Engine- specific information - charging information,selected drive mode, distance to dischargedbattery and hybrid battery charge level. Different drive modes can be selected while driving, e.g. electric power only or, if morepower is needed, a combination of electric andgasoline power. The vehicle calculates a com-bination of driveability, driving experience,environmental impact and fuel economy forthe selected drive mode. In order to function optimally, the hybrid bat- tery (and its electrical drive systems) and thegasoline engine (and its drive systems) mustbe at the correct operating temperature. Bat-tery capacity can be considerably reduced ifthe battery is too cold or too hot. Precondi-tioning prepares the vehicle's drive systemsand passenger compartment before driving tohelp reduce both wear and energy consump-tion. It also helps increase the hybrid battery'srange.The hybrid battery which powers the electricmotor is recharged using the charging cable. Itcan also be recharged during light braking andthrough engine braking in gear position
B. The
combustion engine can also help recharge thehybrid battery.
Important
No electrical current
Keep in mind that if there is no electrical cur- rent to the vehicle, i.e. the ignition is switchedoff or the start battery is discharged, certainfunctions such as brakes, power steering, etc.will not work.
WARNING
If the vehicle does not have electrical cur- rent and both the electric motor and thegasoline engine are switched off, thebrakes cannot be used to stop the vehicle.
Towing not permitted
Never tow a Twin Engine vehicle behind another vehicle, as this could damage theelectric motor.
Exterior engine noise
Because there is no sound from the engine when only the electric motor is running, thevehicle is equipped with artificial exteriorbackground noise. This sound is intended tohelp warn children, pedestrians, cyclists, ani- mals, etc. outside the vehicle of the vehicle'sapproach.
High-voltage electrical current
WARNING
A number of electrical components in Twin Engine Plug-in Hybrid vehicles use high-voltage current and can be extremely dan-gerous if handled incorrectly. These com-ponents and any orange wiring in the vehi-cle may only be handled by trained andqualified Volvo service technicians.
Do not touch anything that is not clearly described in this Owner's Manual.
Related information
Charging the hybrid battery (p. 381)
Hybrid gauge (p. 83)
Drive modes (p. 419)
Starting and stopping preconditioning(p. 225)
Hybrid battery (p. 583)

STARTING AND DRIVING
}}
403
Brake functions
The vehicle's brakes are used to reduce speed or prevent the vehicle from rolling.
In addition to the wheel brakes and parking brakes, the vehicle is also equipped with anumber of automatic brake assist functions.These systems provide assistance by e.g. thedriver not needing to depress the brake pedalat a traffic light or when starting up a hill. Depending on how the vehicle is equipped, the following brake assist functions may beincluded:
Auto-hold brake function at a standstill(Auto Hold)
Hill Start Assist (Hill Start Assist)
Braking assist after a collision
City Safety
Related information
Brakes (p. 403)
Parking brake (p. 406)
Auto-hold brakes (p. 410)
Braking assist after a collision (p. 412)
Hill Start Assist (p. 411)
City Safety
™ (p. 314)
Brakes
The brake pedal is used to apply the vehicle's regular brakes, which are part of the brakesystem.
The vehicle is equipped with two brake cir- cuits. If one brake circuit is damaged, thebrake pedal will go down further whendepressed. More pressure will then berequired from the driver for normal brakingeffect.
WARNING
The power brakes only work when the electric motor or combustion engine is run-ning.
If the brake pedal is used when the engine is switched off, greater pressure must be appliedto brake the vehicle. In very hilly areas or when driving with a heavy load, gear position B can be used to augment
the brakes with engine braking.
Anti-lock brakesThe vehicle is equipped with an Anti-lock Braking System (ABS 2
), which helps prevent
the wheels from locking and helps maintain steering control when braking. Vibrations maybe felt from the brake pedal when ABS isoperating, which is normal. After the vehicle is started, a brief test of theABS system is automatically performed whenthe driver releases the brake pedal. An addi-tional automatic test of the system may beperformed when the vehicle is traveling at alow speed. During the test, the brake pedalmay feel as though it is pulsating.
Light braking charges the hybrid
battery
When the brakes are applied lightly, the elec-tric motor braking function is used. This con-verts the vehicle's kinetic energy into electricalenergy, which is used to charge the hybridbattery. When the battery is being chargedwith the electric motor braking function, thiswill be indicated in the instrument panel.
2 Anti-lock Braking System