2020 VOLVO XC90 TWIN ENGINE sensor

DRIVER SUPPORT
* Option/accessory.291
vehicles ahead, the vehicle will return to the set speed. If the Curve Speed Assist (CSA)
* function is
activated, it may also affect the vehicle's speed.
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.
Adaptive Cruise Control regulates speed byaccelerating and braking. It is normal for thebrakes to emit a slight sound when they arebeing used to adjust speed. Adaptive Cruise Control always attempts toregulate speed smoothly. The driver mustapply the brakes in situations requiring imme-diate braking. For example, when there aregreat differences in speed between vehicles orif the vehicle ahead brakes suddenly. Due tolimitations in the radar sensor, braking mayoccur unexpectedly or not at all. Adaptive Cruise Control is designed to follow a vehicle ahead in the same lane and maintaina time interval to that vehicle set by the driver.If the radar sensor does not detect a vehicleahead, it will instead maintain the speed setby the driver. This will also happen if the speedof the vehicle ahead exceeds the set speed foryour vehicle.
CAUTION
Only a workshop may perform mainte- nance on driver support components – anauthorized Volvo workshop is recom-mended.
Related information

Driver support systems (p. 280)
Adaptive Cruise Control
* controls and dis-
play (p. 292)
Selecting and activating Adaptive Cruise Control
* (p. 293)
Adaptive Cruise Control
* limitations
(p. 296)
Symbols and messages for AdaptiveCruise Control
* (p. 298)
Collision risk warning from driver support (p. 309)
Setting time interval to the vehicle ahead(p. 312)
Adjusting set speed for driver support(p. 311)
Auto-hold braking with driver support(p. 313)
Switching target vehicles with driver sup-port (p. 310)
Passing assistance (p. 317)

DRIVER SUPPORT
}}
* Option/accessory.295
Adaptive Cruise Control *27
standby
mode Adaptive Cruise Control (ACC 28
) can be deac-
tivated and put in standby mode. This may happen automatically or be due to driverintervention.
Standby mode means that the function is selected in the instrument panel but not acti-vated. In standby mode, Adaptive Cruise Con-trol will not regulate speed or distance to thevehicle ahead.
Standby mode due to action by the
driver
Adaptive Cruise Control will be deactivatedand put in standby mode if any of the follow-ing occurs:
The brakes are applied.
The gear selector is moved to
N.
The vehicle is driven faster than the setspeed for more than 1 minute.
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.
WARNING
If Adaptive Cruise Control is in standby mode, the driver must intervene andregulate both speed and distance tothe vehicle ahead.
If the vehicle comes too close to a vehi-cle ahead when Adaptive Cruise Con-trol is in standby mode, the driver canbe warned of the short distance by the Distance Alert
* function.
Automatic standby modeAdaptive Cruise Control is dependent on other systems, such as Electronic Stability Control (ESC 29
). If any of these other systems stops
working, Adaptive Cruise Control will be auto- matically 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:
your vehicle's speed goes below 5 km/h(3 mph) and ACC cannot determine if thevehicle 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 ACC no longer has a vehicle to follow.
the driver opens the door.
the driver unbuckles the seat belt.
the engine speed (rpm) is too low/high.
one or more of the wheels lose traction.
the brake temperature is high.
the parking brake is applied.
the camera/radar sensor is covered bysnow or heavy rain (the camera lens/radarwaves are blocked).Related information

Adaptive Cruise Control
* (p. 290)
Selecting and activating Adaptive Cruise Control
* (p. 293)
27
Depending on market, this function can be either standard or optional.
28 Adaptive Cruise Control
29 Electronic Stability Control

DRIVER SUPPORT
* Option/accessory.
296
Deactivating Adaptive Cruise Control
*
(p. 294)
Adaptive Cruise Control
* limitations
(p. 296)
Adaptive Cruise Control *30
limitations
Adaptive Cruise Control (ACC 31
) may have
limited functionality in certain situations.
Steep roads and/or heavy loadsAdaptive Cruise Control is primarily intended to be driven on flat roads. The function maynot be able to maintain the correct time inter-val to the vehicle ahead when driving downsteep hills. The driver should be extra attentiveand prepared to apply the brakes. Do not use Adaptive Cruise Control if the vehi- cle is carrying a heavy load or towing a trailer.
Other limitationsThe Off Road drive mode cannot be selected
if Adaptive Cruise Control is activated.
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.
NOTE
The function uses the vehicle's camera and radar sensor, which has certain generallimitations.
Related information

Adaptive Cruise Control
* (p. 290)
Camera/radar sensor limitations (p. 322)
30
Depending on market, this function can be either standard or optional.
31 Adaptive Cruise Control

DRIVER SUPPORT
* Option/accessory.299
Symbol Message Meaning
The symbol is WHITE. The vehicle is maintaining the stored speed.
Adaptive Cruise Contr. Unavailable
The symbol is GRAY. Adaptive Cruise Control is in standby mode.
Adaptive Cruise Contr. Service required
The symbol is GRAY.The system is not functioning as intended. Contact a workshop
‒ an authorized Volvo work-
shop is recommended.
Windscreen sensor Sensor blocked, see Owner's manualClean the windshield in front of the camera and radar sensors.
A text message can be erased by briefly press- ing the
button in the center of the right-
side steering wheel keypad. If the message persists: Contact a workshop ‒
an authorized Volvo workshop is recom- mended.
Related information
Adaptive Cruise Control
* (p. 290)

DRIVER SUPPORT
* Option/accessory.
300
Pilot Assist *38
Pilot Assist can help the driver keep the vehi- cle in the current traffic lane by providingsteering assistance and maintaining an evenspeed and a set time interval to the vehicleahead.
How Pilot Assist worksThe Pilot Assist function is primarily intended for use on highways and other major roadswhere it can help provide a more comfortableand relaxing driving experience.
The camera/radar sensor monitors the distance to the vehicle ahead and detects lane markings.
Camera and radar sensor
Distance monitor
Lane marker line monitors The driver sets the desired speed and distance to the vehicle ahead. Pilot Assist monitors thedistance to the vehicle ahead and the trafficlane's side markers using the camera andradar sensor. The system maintains the settime interval to the vehicle ahead by automati-cally adjusting your vehicle's speed and keepsyour vehicle in its lane by providing steeringassistance. If the Curve Speed Assist (CSA)
* function is
activated, it may also affect the vehicle's speed. Pilot Assist's steering assistance is based on monitoring the direction of the vehicle aheadand the traffic lane's side marker lines. Thedriver can override Pilot Assist's steering rec-ommendations at any time and steer inanother direction, e.g. to change lanes or avoidobstacles on the road. If the camera/radar sensor cannot detect the lane's side marker lines or if Pilot Assist isunable for some other reason to clearly inter-pret the lane, Pilot Assist will temporarilydeactivate steering assistance until it can onceagain interpret the lane markings. However,the speed and distance warnings will remainactive. The driver will be alerted by slightvibrations in the steering wheel that the func-tion has been temporarily deactivated.
WARNING
Pilot Assist is deactivated automatically and resumes working without prior notice.
The color of the steering wheel symbol indicates thecurrent status of steeringassistance: • GREEN indicates that steering assistance is active
• GRAY (as shown in illustration) indicates thatsteering assistance is deactivated.
38 Depending on market, this function can be either standard or optional.

DRIVER SUPPORT
}}
* Option/accessory.301
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.
Pilot Assist regulates speed by acceleratingand braking. It is normal for the brakes to emita slight sound when they are being used toadjust speed. Pilot Assist attempts to smoothly regulate speed. The driver must apply the brakes in sit-uations requiring immediate braking. Forexample, when there are great differences in speed between vehicles or if the vehicle aheadbrakes suddenly. Due to limitations in the camera and radar sensor, braking may occur unexpectedly or not at all. Pilot Assist attempts to follow a vehicle ahead in the same lane and maintain a time intervalto that vehicle set by the driver. If the radarsensor does not detect a vehicle ahead, it willinstead maintain the speed set by the driver.This will also happen if the speed of the vehi-cle ahead exceeds the set speed for your vehi-cle.
CAUTION
Only a workshop may perform mainte- nance on driver support components – anauthorized Volvo workshop is recom-mended.
In curves and forks in the roadPilot Assist is designed to interact with the driver. The driver should never wait for steer-ing assistance from Pilot Assist, but insteadshould always be ready to increase his or herown steering efforts, particularly in curves.
When the vehicle is approaching an off-ramp or a fork in the road, the drivershould steer toward the desired lane toindicate to Pilot Assist the desired direc-tion of travel.
Pilot Assist strives to keep the vehicle in the center of the lane
When Pilot Assist provides steering assis- tance, it strives to position the vehicle in thecenter of the lane between the lane markings.To make the driving experience as smooth aspossible, the driver should permit the vehicleto find good positioning. The driver shouldcheck that the vehicle is positioned safely inthe lane and can always adjust the vehicle'sposition by applying more force to the steeringwheel. If Pilot Assist does not position the vehicle appropriately in the lane, the driver shouldturn off Pilot Assist or switch to Adaptive Cruise Control
*.
Hands on the steering wheelPilot Assist only functions if the driver's hands are on the steering wheel.
If Pilot Assist detects that thedriver's hands are not on thesteering wheel, a symbol andtext message will appear toinstruct the driver to activelysteer the vehicle.
If the driver's hands are still not detected on the steering wheel after a few seconds havepassed, the instructions to actively steer thevehicle will be repeated, accompanied by anaudible signal.

DRIVER SUPPORT
* Option/accessory.305
Pilot Assist*42
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 43
). 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. 300)
Selecting and activating Pilot Assist
*
(p. 303)
Deactivating Pilot Assist
* (p. 304)
Pilot Assist
* limitations (p. 306)
42
Depending on market, this function can be either standard or optional.
43 Electronic Stability Control

DRIVER SUPPORT
* Option/accessory.
306
Temporarily deactivating steering assistance with Pilot Assist *44
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. 300)
Selecting and activating Pilot Assist
*
(p. 303)
Deactivating Pilot Assist
* (p. 304)
Pilot Assist
* limitations (p. 306)
Pilot Assist *45
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-
44
Depending on market, this function can be either standard or optional.