engine VOLVO V90 CROSS COUNTRY 2021 Service Manual

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DRIVER SUPPORT
* Option/accessory.
280 additional power to wheels that are not spin- ning. This function can also help prevent the wheels from spinning while the vehicle is accelerating.
Engine drag control
Engine drag control (EDC
3
) can help prevent
inadvertent wheel lock, e.g. after downshiftingor using engine braking when driving at lowspeeds on a slippery surface. Inadvertent wheel lock while driving could impair the driver's ability to steer the vehicle.
Trailer Stability Assist *4
Trailer Stability Assist (TSA
5
) is designed to
help stabilize a vehicle that is towing a trailer ifthe vehicle and trailer have begun to sway.
NOTE
Trailer Stability Assist is deactivated if ESC
Sport Mode is activated.
Related information
Driver support systems (p. 278)
Activating or deactivating Sport mode for Electronic Stability Control (p. 281)
Electronic Stability Control symbols andmessages (p. 282)
Trailer Stability Assist
* (p. 448)
Electronic Stability Control in sport mode The stability system (ESC 6
) is always acti-
vated and cannot be switched off. However, the driver can select
ESC Sport Mode,
which offers more active driving characteris- tics.
With the ESC Sport Mode sub-function
selected, intervention from the system is reduced and more lateral movement is permit-ted, giving the driver more control of the vehi-cle than usual. When
ESC Sport Mode is selected, the func-
tion may seem to be disabled even though it continues to assist the driver.
NOTE
When ESC Sport Mode is selected, the
trailer stabilizer (TSA 7
) is switched off.
ESC Sport Mode also helps provide more
traction, even if the vehicle gets stuck or is driving on a loose surface such as deep snowor loose sand.
3 Engine Drag Control4Trailer Stability Assist is included if the vehicle is equipped with a Volvo original towbar.5 Trailer Stability Assist
6 Electronic Stability Control
7 Trailer Stability Assist

DRIVER SUPPORT
* Option/accessory.281
Related information
Electronic Stability Control (p. 279)
Activating or deactivating Sport mode for Electronic Stability Control (p. 281)
Trailer Stability Assist
* (p. 448)
Activating or deactivating Sport mode for Electronic StabilityControl
The stability system (ESC 8
) is always acti-
vated and cannot be switched off. However, the driver can select Sport mode, whichoffers more active driving characteristics.
Activate or deactivate the function using this button inthe center display's Functionview.
Illuminated button indicator light – the function is activated.
Extinguished button indicator light – thefunction is deactivated.
When
ESC Sport Mode is
activated, this symbol will illuminate with a steady glowin the instrument panel. It willremain on until the driverdeactivates the function oruntil the engine is turned off.
The system will return to normal mode thenext time the engine is started.
The ESC Sport Mode function cannot be
selected when any of the following functions are activated:
Cruise control
Adaptive Cruise Control
*
Pilot Assist
*
Related information
Electronic Stability Control in sport mode(p. 280)
Electronic Stability Control (p. 279)
8
Electronic Stability Control

DRIVER SUPPORT
282
Electronic Stability Control symbols and messagesA number of symbols and messages related to Electronic Stability Control (ESC 9
) may be displayed in the instrument panel. Several examples are provided below.
Symbol Message Meaning
Steady glow for approx. 2 seconds System check when the engine is started.
Flashing light The system is actively operating.
Steady glow Sport mode is activated.
NOTE! The system is not deactivated in this mode, but has parti-
ally reduced functionality.
9 Electronic Stability Control

DRIVER SUPPORT
283
Symbol Message Meaning
ESC Temporarily offThe system's functionality has been temporarily reduced due to high brake system tempera- tures. The function will be automatically reactivated when the brakes have cooled.
ESC Service requiredThe system is not functioning properly. Stop the vehicle in a safe place, turn off the engine and then restart it.
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
Electronic Stability Control (p. 279)

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DRIVER SUPPORT
* Option/accessory.
292
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.
Using engine braking instead of applying the brakes
Cruise Control regulates speed by lightly applying the brakes. On downgrades, it cansometimes be desirable to roll a bit faster andlet speed be reduced instead by engine brak-ing alone. The driver can temporarily disen-gage the Cruise Control braking function. To disengage CC:
–Press the accelerator pedal about halfway down and then release it.
> Cruise Control will automatically disen-
gage the automatic brake function and speed will only be reduced using theengine braking function.
Related information
Driver support systems (p. 278)
Selecting and activating cruise control(p. 292)
Deactivating cruise control (p. 293)
Cruise control standby mode (p. 294)
Adjusting set speed for driver support(p. 321)
Switching between cruise control and Adaptive Cruise Control
* in the center dis-
play (p. 301)
Selecting and activating cruise control The Cruise Control (CC 29
) function must be
selected and activated in order to regulate speed.
In order to start Cruise Control from standby mode, the vehicle's current speed must be30 km/h (20 mph) or higher.
1. Press the ◀ (1) or ▶ (3) button on the
steering wheel keypad and scroll to the cruise control symbol
(4).
> Gray symbol – cruise control is in standby mode.
29Cruise Control

DRIVER SUPPORT
* Option/accessory.
294
Cruise control standby mode Cruise control (CC 31
) can be deactivated and
put in standby mode. This may happen auto- matically 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, cruise control will notregulate speed.
Standby mode due to action by the
driver
Cruise control will be deactivated and put instandby mode if any of the following 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.
The driver must then control the vehicle'sspeed. 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 standby modeThe function may automatically go intostandby mode if one of the following occurs: The wheels lose traction.
The engine speed (rpm) is too low/high.
The temperature in the brake system becomes too high.
The vehicle's speed goes below 30 km/h(20 mph).
The driver must then control the vehicle'sspeed.
Related information
Cruise control (p. 291)
Selecting and activating cruise control(p. 292)
Deactivating cruise control (p. 293)
Adaptive Cruise Control
*32
Adaptive Cruise Control (ACC 33
) can help the
driver to maintain a constant speed, com- bined with a preset time interval to the vehi-cle in front.
The camera/radar sensor measures the distance to the vehicle ahead.
Adaptive Cruise Control can help provide a more relaxed driving experience on long tripson highways or long, straight roads with eventraffic flows. The driver sets a speed and a time interval to the vehicle ahead. If the camera/radar sensordetects a slower-moving vehicle ahead, yourvehicle's speed will be automatically adaptedaccording to the set time interval to that vehi-
31 Cruise Control
32 Depending on market, this function can be either standard or optional.
33 Adaptive Cruise Control

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DRIVER SUPPORT
* Option/accessory.
300 such as Electronic Stability Control (ESC
45
).
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 and radar unit is covered by snow or heavy rain (the camera lens/radarwaves are blocked).
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 below 5 km/h(3 mph) and the vehicle ahead turns sothat ACC no longer has a vehicle to follow.
Related information

Adaptive Cruise Control
* (p. 294)
Selecting and activating Adaptive Cruise Control
* (p. 297)
Deactivating Adaptive Cruise Control
*
(p. 298)
Adaptive Cruise Control
* limitations
(p. 300)
Adaptive Cruise Control *46
limitations Adaptive Cruise Control (ACC 47
) 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.
Drive mode unavailableThe 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. 294)
Camera/radar sensor limitations (p. 390)
45
Electronic Stability Control
46 Depending on market, this function can be either standard or optional.

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DRIVER SUPPORT
* Option/accessory.
310 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. 294)
Selecting and activating Adaptive CruiseControl
* (p. 297)
Switching between cruise control andAdaptive Cruise Control
* in the center dis-
play (p. 301)
Adaptive Cruise Control
* limitations
(p. 300)
Temporarily deactivating steering assis-tance with Pilot Assist
* (p. 311)
Pilot Assist *59
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 mode
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.
The function may automatically go intostandby mode if one of the following occurs. One of the systems that Pilot Assist isdependent on stops working, such as Electronic Stability Control 60
.
The driver's hands are not on the steering wheel.
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 and radar unit is covered bysnow or heavy rain (the camera lens/radarwaves are blocked).
59
Depending on market, this function can be either standard or optional.

DRIVER SUPPORT
* Option/accessory.317
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 65
.
Related information
Curve Speed Assist (CSA)
* (p. 316)
Curve Speed Assist (CSA)
* limitations
(p. 317)
Curve Speed Assist (CSA) *66
limitations
Curve Speed Assist (CSA) functionality may be reduced in certain situations. The drivershould 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 67
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 67
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. 316)
Activating or deactivating Curve Speed Assist (CSA)
* (p. 317)
Camera/radar sensor limitations (p. 390)
65
These alternatives are market dependent.
66 This function is only available on some markets.
67 Only with Volvo Sensus Navigation * installed.

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DRIVER SUPPORT
* Option/accessory.
324
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.
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. This means that the brakes will be released and the vehicle 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 position.
The driver puts Adaptive Cruise Control or Pilot Assist in standby mode.
Auto Activate Parking BrakeThe parking brake will be applied if the func-tion is keeping the vehicle stationary using thebrakes 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.
Related information
Driver support systems (p. 278)
Adaptive Cruise Control
* (p. 294)
Pilot Assist
* (p. 304)
Brake functions (p. 403)
Lane Keeping Aid
Lane Keeping Aid (LKA 69
) is designed to
actively steer the vehicle on freeways, high- ways and other major roads to help the driverreduce the risk of the vehicle unintentionallyveering out of the lane.
Lake Keeping Aid steers the vehicle back into the lane and/or alerts the driver using vibra-tions in the steering wheel. Lane Keeping Aid is active at speeds between 65–200 km/h (40–125 mph) on roads withclearly visible traffic lane marker lines. On narrow roads, the function may be unavail- able and go into standby mode. The functionwill become available again when the roadbecomes sufficiently wide.
A camera monitors the road/traffic lane's marker lines.