2017 VOLVO XC90 TWIN ENGINE HYBRID engine

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.263
Electronic Stability Control (ESC)
Electronic Stability Control (ESC) helps reducewheel 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 dealwith all situations or road conditions.
The driver is always responsible for operatingthe 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 control
This function is designed to help reduce wheelspin 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 control
This function is designed to help prevent thedrive wheels from spinning while the vehicle isaccelerating.

Active Yaw Control
At 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 EDC
EDC 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 * 1
TSA helps stabilize a vehicle that is towing atrailer when the vehicle and trailer have begun tosway.
This system is automatically deactivated if thedriver selects Sport mode.
Related information
•Detachable trailer hitch (p. 398)
•Driving with a trailer (p. 397)
•Trailer Stability Assist (TSA) (p. 399)
•Electronic Stability Control (ESC) sport mode(p. 264)
•Electronic Stability Control (ESC) symbolsand messages (p. 265)

1
This function is included if the vehicle is equipped with a Volvo original trailer hitch.

DRIVER SUPPORT
264
Electronic Stability Control (ESC)sport mode
ESC is always activated and cannot be switchedoff.
However, the driver can select Sport mode,which offers more active driving characteristics.
In Sport mode, the engine management systemmonitors movement of the accelerator pedal andsteering 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 useSport mode for maximum tractive force.
If the driver releases pressure on the acceleratorpedal, ETC will also activate to help stabilize thevehicle.

Activating/deactivating Sport mode
In the center display's Functionview, tap ESC Sport Mode.The green indicator light in thebutton will illuminate to showthat the function has been acti-vated or gray when the functionis deactivated.
When Sport mode is activated, thissymbol will illuminate in the instrumentpanel. It will remain on until the driverdeactivates the function. ETC will alsoreturn to normal mode when the engine is restar-ted.
Related information
•Electronic Stability Control (ESC) (p. 263)

DRIVER SUPPORT
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265
Electronic Stability Control (ESC)symbols and messages
SymbolMessageDescription
Steady glow for 2 secondswhen 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 off
See the message in the instrument panel.

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266
SymbolMessageDescription
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 tohave the system inspected.

WARNING
The stability system is intended to helpimprove 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. 263)

DRIVER SUPPORT
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* Option/accessory, for more information, see Introduction.267
Roll stability control (RSC)
Volvo's Roll Stability Control (RSC) is a stabilitysystem designed to help minimize the risk of arollover in emergency maneuvers or if a skidshould occur.
RSC uses a gyroscopic sensor that registers theamount of change in the lateral angle at whichthe vehicle is leaning. Using this information, RSCcalculates the likelihood of a rollover. If there isan imminent risk of a rollover, the stability systemis activated, power to the engine is cut and thebrakes are applied to one or more of the wheelsuntil the vehicle regains stability.

WARNING
The vehicle

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DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.268

Related information
•Starting and activating the Speed Limiter(SL)* (p. 268)
•Deactivating/reactivating the Speed Limiter*(p. 272)
•Changing a Speed Limiter (SL)* maximumspeed (p. 269)
•Automatic Speed Limiter (ASL)* (p. 269)
•Activating/deactivating the Automatic SpeedLimiter (ASL)* (p. 271)
•Changing tolerance for the Automatic SpeedLimiter (p. 271)
•Turning the Speed Limiter* off (p. 273)
Starting and activating the Speed
Limiter (SL)*
The Speed Limiter (SL) is a feature that has tobe 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 theinstrument panel. This indicates that SLhas been selected and is in standbymode (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 beput 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 thevehicle's current speed as the maximumspeed.

Related information
•Speed limiter (SL)* (p. 267)
•Deactivating/reactivating the Speed Limiter*(p. 272)
•Changing a Speed Limiter (SL)* maximumspeed (p. 269)
•Automatic Speed Limiter (ASL)* (p. 269)
•Activating/deactivating the Automatic SpeedLimiter (ASL)* (p. 271)
•Changing tolerance for the Automatic SpeedLimiter (p. 271)
•Turning the Speed Limiter* off (p. 273)

DRIVER SUPPORT
* Option/accessory, for more information, see Introduction.275

NOTE
Before CC can be activated, the vehicle'sspeed must be at least 20 mph (30 km/h).This is also the lowest speed that can be set.

Activating CC (putting it in active mode
and setting a speed)
–With the symbol displayed (CC is in
standby mode), press the button (2) onthe left-side steering wheel keypad.
>This puts CC in active mode and willmaintain the vehicle's current speed.

Related information
•Cruise Control (CC) (p. 274)
•Switching between Cruise Control andAdaptive Cruise Control* (p. 278)
•Deactivating/resuming Cruise Control (CC)(p. 276)
•Turning Cruise Control off (p. 277)
Changing Cruise Control speed
Changing a set speed
Function buttons and symbols (generic illustration)
–Change a set speed by pressing the (1)or — (3) buttons briefly or by pressing andholding them:
•Press briefly: changes speed in+/– 5 mph (+/– 5 km/h) increments.Each press changes the vehicle's speedby +/– 5 mph (+/– 5 km/h).
•Press and hold: changes the speed+/– 1 mph (+/– 1 km/h) at a time.Release the button when the set speedindicator (4)/(6) has moved to the desiredspeed.
If speed is increased by pressing the accelerator
pedal before the button is pressed, the vehi-cle's speed when the button is pressed will
become the set speed assuming that the accel-erator pedal is still depressed when the button ispressed.
A temporary increase in speed, such as whenpassing another vehicle, does not affect the CCset speed. The vehicle will return to the set speedwhen the accelerator pedal is released. Alwaysobserve posted speed limits.

Engine braking instead of applying the
brakes
CC regulates speed by applying the brakeslightly. To avoid a loss of speed when drivingdown hills, use the engine braking functioninstead of letting the CC apply the brakes. In thissituation, the driver can temporarily deactivate theCC braking function.
To do so:
–Press the accelerator pedal approx. halfwaydown and release it.
>CC will automatically deactivate the auto-matic brake function and will then onlyuse the engine braking function.

Related information
•Cruise Control (CC) (p. 274)

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Deactivating/resuming CruiseControl (CC)
Cruise Control (CC) can be temporarily deacti-vated and put in standby mode.

Deactivating and putting CC in standby
mode
To temporarily deactivate and put Cruise Controlin standby mode:
Function buttons and symbols (generic illustration)
–Press the button (2).
>The set speed marker (4) and symbols willchange colors from WHITE to GRAY.
This indicates that CC is temporarily instandby mode and will not maintain a setspeed.
Standby mode due to action by the driver
CC is temporarily deactivated and put in standbymode if:
•the brakes are applied
•The gear selector is moved to N
•the vehicle is driven faster than the setspeed for more than 1 minute.
In these cases, the driver will have to regulate thevehicle's speed.
A temporary increase in speed, such as whenpassing another vehicle, does not affect the CCset speed. The vehicle will return to the set speedwhen the accelerator pedal is released.

Automatic standby mode
CC switches automatically to standby mode if:
•the wheels lose traction
•engine speed (rpm) is too high/low
•brake temperature is too high
•the vehicle's speed goes below approx.20 mph (30 km/h)
In these cases, the driver will have to regulate thevehicle's speed.
Reactivating CC from standby mode
To reactivate CC after it has temporarily been putin standby mode:
–Press the button (1).
>The set speed marker (4) will changecolor from GRAY to WHITE. The vehiclewill then return to the most recently setspeed.

WARNING
There may be a significant increase in speed
after the button has been pressed.
or