VOLVO XC90 T8 2017 Owner´s Manual

DRIVER SUPPORT
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* Option/accessory.259
Related information
•Driver support systems (p. 258)
• Drive modes (p. 411)
Electronic Stability Control (ESC)
Electronic Stability Control (ESC) helps reduce wheel spin, counteract skidding and to generallyhelp improve directional stability.
A pulsating sound will be audi- ble when the system is activelyoperating and is normal. Accel-eration may also be slightlyslower than normal.
WARNING
ESC is a supplementary aid and cannot deal with all situations or road conditions. The driver is always responsible for operating the vehicle in a safe manner in accordancewith current traffic regulations.
ESC consists of the following functions: • Traction control
• Spin control
• Active Yaw Control
• Engine Drag Control
• Trailer Stability Assist
Traction controlThis function is designed to help reduce wheel spin by transferring power from a drive wheel that begins to lose traction to the wheel on the oppo-site side of the vehicle (on the same axle).
Spin controlThis function is designed to help prevent thedrive wheels from spinning while the vehicle isaccelerating.
Active Yaw ControlAt low speeds, this function helps maintain direc-tional stability by braking one or more of thewheels if the vehicle shows a tendency to skid orslide laterally.
Engine Drag Control EDCEDC helps keep the engine running if the wheelsshow a tendency to lock, e.g., when shifting downin the manual shifting mode or while using theengine's braking function on a slippery surface. Ifthe wheels were to lock, the vehicle wouldbecome more difficult to steer.
Trailer Stability Assist
*1TSA helps stabilize a vehicle that is towing atrailer when the vehicle and trailer have begun tosway. This system is automatically deactivated if the driver selects
Sport mode.
1
This function is included if the vehicle is equipped with a Volvo original trailer hitch.

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Related information
• Detachable trailer hitch
* (p. 387)
• Driving with a trailer (p. 384)
• Trailer Stability Assist (TSA) (p. 388)
• Electronic Stability Control (ESC) sport mode (p. 260)
• Electronic Stability Control (ESC) symbolsand messages (p. 261)
Electronic Stability Control (ESC) sport mode
ESC is always activated and cannot be switched off.
However, the driver can select Sport mode,
which offers more active driving characteristics. In Sport mode, the engine management system
monitors movement of the accelerator pedal and steering wheel for sportier driving and allowsmore lateral movement of the rear wheels beforeESC is triggered. Under certain circumstances, such as when driv- ing with snow chains, or driving in deep snow orloose sand, it may be advisable to temporarily use Sport mode for maximum tractive force.
If the driver releases pressure on the accelerator pedal, ETC will also activate to help stabilize thevehicle.
Activating/deactivating Sport modeIn the center display's Function view, tap ESC Sport Mode.
The green indicator light in the button will illuminate to showthat the function has been acti-vated or gray when the functionis deactivated.
When Sport mode is activated, this
symbol will illuminate in the instrument panel. It will remain on until the driverdeactivates the function. ETC will also
return to normal mode when the engine is restar-ted.
Related information
• Electronic Stability Control (ESC) (p. 259)

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Electronic Stability Control (ESC) symbols and messages
SymbolMessage Description
Steady glow for 2 seconds when the engine is started.The system is performing a self-diagnostic test.
Flashing symbol. ESC is actively functioning to help counteract wheel spin and/or a skid.
Steady glow.
Sport mode has been activated.
Please note that ESC is not deactivated at this time but its functionality is reduced.
ESC Temporarily offSee the message in the instrument panel.

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SymbolMessage Description
ESC Temporarily offThe ESC system function has been temporarily reduced due to high brake disc temperature. The function reac- tivates automatically when the brakes have cooled.
ESC Service requiredThe ESC system is not functioning properly.
• Stop the vehicle in a safe place, turn off the engine and restart it.
• If the message is still displayed when the engine has restarted, drive to an authorized Volvo workshop to have the system inspected.
WARNING
The stability system is intended to help improve driving safety. It supplements, but cannever replace, the driver's judgment andresponsibility when operating the vehicle.Speed and driving style should always beadapted to traffic and road conditions.
Related information
• Electronic Stability Control (ESC) (p. 259)

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Roll stability control (RSC)
Volvo's Roll Stability Control (RSC) is a stability system designed to help minimize the risk of arollover in emergency maneuvers or if a skidshould occur.
RSC registers the amount of change in the lat- eral angle at which the vehicle is leaning. Usingthis information, RSC calculates the likelihood ofa rollover. If there is an imminent risk of a rollover,the stability system is activated, power to theengine is cut and the brakes are applied to oneor more of the wheels until the vehicle regainsstability.
WARNING
The vehicle

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Related information
• Starting and activating the Speed Limiter (SL)
* (p. 264)
• Deactivating/reactivating the Speed Limiter
*
(p. 268)
• Changing a Speed Limiter (SL)
* maximum
speed (p. 265)
• Automatic Speed Limiter (ASL)
* (p. 265)
• Activating/deactivating the Automatic SpeedLimiter (ASL)
* (p. 267)
• Changing tolerance for the Automatic Speed Limiter (p. 267)
• Turning the Speed Limiter
* off (p. 269)
Starting and activating the Speed Limiter (SL) *
The Speed Limiter (SL) is a feature that has to be selected and activated in order to set a maxi-mum speed.
Selecting SL (putting it in standby mode)
Function buttons and symbols
–Press ◀ (1) or ▶ (3) to scroll to the Speed
Limiter (
) function.
> The symbol (4) will be displayed in the instrument panel. This indicates that SL has been selected and is in standby
mode (no maximum speed has been set).
Activating SL (putting it in active mode and setting a maximum speed)
The engine must be running before SL can be put in active mode. The lowest maximum speedthat can be set is 20 mph (30 km/h).
–With SL in standby mode (the will
be displayed), press the
button (2).
> This puts SL in active mode and sets the vehicle's current speed as the maximum speed.
Related information
• Speed limiter (SL)
* (p. 263)
• Deactivating/reactivating the Speed Limiter
*
(p. 268)
• Changing a Speed Limiter (SL)
* maximum
speed (p. 265)
• Automatic Speed Limiter (ASL)
* (p. 265)
• Activating/deactivating the Automatic Speed Limiter (ASL)
* (p. 267)
• Changing tolerance for the Automatic Speed Limiter (p. 267)
• Turning the Speed Limiter
* off (p. 269)

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* Option/accessory.265
Changing a Speed Limiter (SL) *
maximum speed
Function buttons and symbols
–Change a set maximum speed by pressing the
(1) or — (3) buttons briefly or by
pressing and holding them: • Press briefly
: changes the maximum
speed in +/– 5 mph (+/– 5 km/h) incre- ments. Each press changes the maximumspeed by +/– 5 mph (+/– 5 km/h).
• Press and hold
: changes the maximum
speed +/– 1 mph (+/– 1 km/h) at a time.Release the button when the indicator (4)has moved to the desired maximumspeed.
LimitationsWhen driving down steep hills, the SpeedLimiter's braking effect may not be adequate andthe set maximum speed may be exceeded. The message
Speed limit exceeded will appear in
the instrument panel to alert the driver.
NOTE
This message will appear if the maximum speed is exceeded by more than approx.2 mph (3 km/h).
Related information
• Speed limiter (SL)
* (p. 263)
Automatic Speed Limiter (ASL) *
Automatic Speed Limiter (ASL) helps the driver adapt the vehicle's maximum speed to the pos-ted speed limits.
The Speed Limiter (SL) function can be switched to Automatic Speed Limiter.
Where applicable, ASL uses speed information from the Road Sign Information * system to auto-
matically adapt the vehicle's maximum speed.
WARNING
• ASL is a supplemental aid to the driver and does not function in all driving situa-tions or in all traffic, weather or road con-ditions. It can never replace the driver

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Is SL or ASL active?Symbols in the instrument panel indicate which function is active:
Symbol SLASL
A✓ ✓
Sign symbol B
next to "70": ASL is acti-
vated.
✓
AWHITE symbol: the function is active, GRAY symbol: the func- tion is in standby mode.
B See the section "ASL symbol" below for an explanation of thesymbol's different colors.
The ASL symbol
A road sign symbol (next to the stored speed in the center of the speedome-ter) can be displayed in three differentcolors as explained in the following
table:
Road sign
symbol's color Explanation
Green/yellow ASL is active Gray ASL is in standby mode
Amber/orange ASL is temporarily in standby mode (e.g., because a speed limit sign could not be read)
ASL limitations
•ASL utilizes the speed limit information provi- ded by the Road Sign Information
* system
(RSI), not from the speed limit signs that the
vehicle passes.
• If RSI cannot provide ASL with speed-related information, ASL will go into standby modeand switch to SL. The driver will have to reactand adapt the vehicle's speed.
• ASL will reactivate when RSI is once againable to read a speed limit sign.
See also the article "Road Sign Information limi-tations".
Related information
• Speed limiter (SL)
* (p. 263)
• Activating/deactivating the Automatic Speed Limiter (ASL)
* (p. 267)
• Changing tolerance for the Automatic Speed Limiter (p. 267) •
Starting and activating the Speed Limiter (SL)
* (p. 264)
• Deactivating/reactivating the Speed Limiter
*
(p. 268)
• Road Sign Information (RSI)
* (p. 332)
• Road Sign Information (RSI)
* limitations
(p. 334)

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* Option/accessory.267
Activating/deactivating the Automatic Speed Limiter (ASL) *
The function Automatic Speed Limiter (ASL) is a
supplement to the Speed Limiter (SL) and can be activated/deactivated.
ASL is activated/deactivated in the center display's Functionview.
Activating ASL
With SL activated: 1.
Tap the
Speed Sign Assist button in the
center display's Function view.
> ASL will go into standby mode and a green indicator light in the button will illu- minate. A road sign symbol will be dis-played in center of the speedometer.
2. Press the
button on the left-side steer-
ing wheel keypad.
> ASL will be activated with the vehicle's current speed.
Deactivating ASL
–Tap the Speed Sign Assist button in the
center display's Function view.
> ASL will be deactivated, the indicator will be GRAY and the Speed limiter (SL) will be activated.
WARNING
After switching from ASL to SL, the vehicle will no longer adapt speed to posted speedlimits. It will only limit the vehicle's maximumspeed.
Related information
• Speed limiter (SL)
* (p. 263)
• Automatic Speed Limiter (ASL)
* (p. 265)
Changing tolerance for the Automatic Speed Limiter
Automatic Speed Limiter can be set to different tolerance levels.
Posted speed limit toleranceASL can be set to allow the vehicle to drive above or below the posted speed limit. For exam-ple, if the current posted speed limit is 43 mph(70 km/h), the driver can opt to allow the vehicleto drive at a speed of 47 mph (75 km/h).

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Function buttons and symbols (generic illustration)
–Press the button (1) until 43 mph
(70 km/h) has changed to 47 mph (75 km/h) in the center of the speedometer (4).
> The vehicle will then use the selected tol-
erance +4 mph (+5 km/h) until the vehi- cle passes a sign with a lower or higherspeed limit. The vehicle will then adjust tothe new maximum speed and the set tol-erance will be deleted from the system'smemory. If the Road Sign Information * system is
activated, the posted speed limit will be indicated by a RED marker on the spee-dometer's speed scale. The set tolerance can be adjusted in the same way as the Speed Limiter's setmaximum speed.
NOTE
The greatest tolerance that can be set is +/– 5 mph (10 km/h).
Related information
• Automatic Speed Limiter (ASL)
* (p. 265)
• Activating/deactivating the Automatic Speed Limiter (ASL)
* (p. 267)
• Road Sign Information (RSI)
* (p. 332)
• Changing a Speed Limiter (SL)
* maximum
speed (p. 265)
Deactivating/reactivating the Speed Limiter *
The Speed Limiter (SL) can be temporarily deac- tivated and put in standby mode.
Deactivating and putting SL in standby
mode
To temporarily put the Speed Limiter in standby mode:
Function buttons and symbols
–Press the button (2).
> The symbols in the instrument panel will change colors from WHITE to GRAY. This indicates that SL is temporarily in standby mode and will not limit the vehi-cle's maximum speed.