2020 VOLVO XC90 TWIN ENGINE control

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.
292
Adaptive Cruise Control *21
controls
and display
A summary of how Adaptive Cruise Control (ACC 22
) is controlled using the left-side steer-
ing wheel keypad and how the function is shown in the display.
: From standby mode - activates and
sets the current speed
: From active mode - deactivates/
puts in standby mode
: Activates the function from standby
mode and resumes the set speed
: Increases the set speed
: Reduces the set speed
Increases the time interval to the vehicle ahead
Reduces the time interval to the vehicle ahead
Target vehicle indicator: the function has detected and is following a target vehicleusing the set time interval
Symbol for time interval to the vehicle ahead
Instrument panel
Speed indicators.
Set speed.
Speed of the vehicle ahead.
The current speed of your vehicle.
Related information
Adaptive Cruise Control
* (p. 290)
Adaptive Cruise Control
* limitations
(p. 296)
21 Depending on market, this function can be either standard or optional.
22 Adaptive Cruise Control

DRIVER SUPPORT
}}
* Option/accessory.293
Selecting and activating Adaptive Cruise Control *23
Adaptive Cruise Control (ACC 24
) must first be
selected and then activated before it can reg- ulate speed and distance.
To start the function:
The driver's seat belt must be buckled and the driver's door must be closed.
There must be a vehicle ahead (targetvehicle) within a reasonable distance or your vehicle's current speed must be atleast 15 km/h (9 mph).
1. Press the ◀ (2) or ▶ (3) button on the
steering wheel keypad and scroll to the Adaptive Cruise Control symbol
(4).
> Gray symbol – Adaptive Cruise Control is in standby mode.
2. When Speed Limiter is selected, press
(1) on the steering wheel keypad to
activate.
> White symbol – Speed Limiter starts and the current speed is stored as the maximum speed.
Reactivating Adaptive Cruise Control to the last stored speed
–When Adaptive Cruise Control is selected, press
on the steering wheel keypad to
activate.
> The Cruise Control marking in the instrument panel will change from GRAY to WHITE and the vehicle willthen return to the most recently setspeed.
WARNING
A noticeable increase in speed may follow when the speed is resumed with the
steering wheel button.
Additional markings in the instrument panel
ACC will only regulate the time interval to the vehicleahead when the distancesymbol shows two vehicles.
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
Adaptive Cruise Control
* (p. 290)
Deactivating Adaptive Cruise Control
*
(p. 294)
23 Depending on market, this function can be either standard or optional.
24 Adaptive Cruise Control

DRIVER SUPPORT
* Option/accessory.
294
Switching between cruise control and Adaptive Cruise Control
* in the center dis-
play (p. 297)
Adaptive Cruise Control
* limitations
(p. 296)
Deactivating Adaptive Cruise Control *25
Adaptive Cruise Control (ACC 26
) can be deac-
tivated and switched off.
1. Press the button on the steering
wheel (2).
> The symbol and markings turn gray – Adaptive Cruise Control goes into standby mode. The time interval indica-tor light and any symbols for the targetvehicle will go out. 2. Press the
◀ (1) or ▶ (3) buttons on the
steering wheel to select another function.
> The Adaptive Cruise Control symbol and marking (4) in the instrument panel will go out and the stored maximumspeed will be erased.
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.
Related information
Adaptive Cruise Control
* (p. 290)
Selecting and activating Adaptive CruiseControl
* (p. 293)
Switching between cruise control andAdaptive Cruise Control
* in the center dis-
play (p. 297)
Adaptive Cruise Control
* limitations
(p. 296)
25 Depending on market, this function can be either standard or optional.
26 Adaptive Cruise Control

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.297
Switching between cruise control and Adaptive Cruise Control *32
in
the center display
When the regular cruise control (CC 33
) is
selected in the instrument panel, you can switch to Adaptive Cruise Control (ACC 34
) in
the center display's Function view.
Activate or deactivate the function using this button inthe center display's Functionview.
GREEN button indicator light – Adaptive Cruise Control is deactivated and the reg-ular cruise control is in standby mode.
GRAY button indicator light – regularcruise control is deactivated and theAdaptive Cruise Control is in standbymode. A symbol in the instrument panel indicateswhich cruise control system is active
Cruise control
(CC) Adaptive Cruise
Control (ACC)
AA
A WHITE symbol: The function is active. GRAY symbol: Standby mode
Related information
Adaptive Cruise Control
* (p. 290)
Cruise control (p. 287)
32
Depending on market, this function can be either standard or optional.
33 Cruise Control
34 Adaptive Cruise Control

DRIVER SUPPORT
* Option/accessory.
298
Symbols and messages for Adaptive Cruise Control *35
A number of symbols and messages relating to Adaptive Cruise Control (ACC 36
) may be
displayed in the instrument panel and/or the head-up display *.
In the following illustration, Road Sign Infor- mation * (RSI 37
) indicates that the maximum
permitted speed is 130 km/h (80 mph).
The previous illustration shows that Adaptive Cruise Control is set to maintain a speed of110 km/h (68 mph) and that there is no targetvehicle ahead to follow.
The previous illustration shows that Adaptive Cruise Control is set to maintain a speed of110 km/h (68 mph) and is following a targetvehicle ahead, which is traveling at the samespeed.
35 Depending on market, this function can be either standard or optional.
36 Adaptive Cruise Control
37 Road Sign Information