2017 VOLVO XC90 engine

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385
Selecting a drive mode
1.Press the DRIVE MODE control in the tun-
nel console.
> A pop-up menu will open in the center display.
2. Roll the control upward or downward to scroll to the desired drive mode.
3. Press the control again to select it. A drive mode can also be selected by tapping its button on the center display.
> The selected drive mode will be displayedin the instrument panel.
When a drive mode cannot be selected, one of the following messages may be displayed:
•
Not possible to select due to gear in manual
•Not possible to select due to low battery
•Not possible to select due to low temperature
•Not possible to select due to limitations
•Not possible to select due to high speed.
Available drive modes
COMFORT
This is the default mode. When the engine is started, COMFORT drive mode will be selected and the Start/Stop func-tion will be activated. This setting offers drivingcomfort, light steering and relatively soft suspen-sion.
ECO
ECO drive mode is designed to help promote fuel-efficient driving. In this mode, Start/Stop is activated, ground clearance is lowered to help reduce wind resis-tance and certain climate system functions willbe reduced. There is an ECO gauge in the instrument panel to indicate the current level of fuel-efficiency. Seealso the article "ECO drive mode."
OFF ROAD
This mode helps maximize the vehicle's capacity to traverse difficult terrain or poor roads. In OFF ROAD, ground clearance is maximized, the steering is light, and All Wheel Drive and Hill Descent Control are activated.
Start/Stop is
deactivated. This drive mode can only be activated at low speeds (the permissible speed range will beshown on the speedometer). At higher speeds,OFF ROAD mode will be cancelled and anotherdrive mode will be activated. In OFF ROAD mode, a compass will be displayed in the instrument panel. This drive mode is not intended for normal street driving.
CAUTION
OFF ROAD drive mode may not be used if the vehicle is towing a trailer without an elec-trical connection. This could result in damageto the pneumatic suspension system's bel-lows.
Due to the increased ground clearance, if the OFF ROAD mode was selected when the enginewas switched off, the suspension will lower whenthe engine is restarted.

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* Option/accessory.387
ECO drive mode
The Eco drive mode is a function designed to give the driver the opportunity to drive more eco-nomically and to help reduce fuel consumption.
When this mode is activated, the following cha- racteristics are modified:
• The automatic transmission's shifting points
• The engine management system and accel-erator pedal response
• Eco Coast functionality is activated: enginebraking is disabled at speeds betweenapprox. 40 and 87 mph(65 and 140 km/h)
• Climate system settings: certain functionswill be temporarily reduced or deactivated
• The suspension's self-leveling function
* low-
ers ground clearance to help reduce windresistance
• Information is shown in an ECO gauge in theinstrument panel to help promote more eco-nomical driving
NOTE
When Eco is activated, several climate system parameters are changed and the function ofcertain current-consuming systems will bereduced. Some of these functions can be restarted manually but full functionality will not berestored until Eco is deactivated.
Selecting ECO modeWhen the engine is switched off, ECO mode is deactivated and must be reactivated each time the engine is started.
ECO will appear in the
instrument panel when the function is activated.
Via Function view
Tap the button in the center display's Function view. An indi-cator light in the button showsthat the function is activated.
With the drive mode control *
1.
Press the DRIVE MODE control.
> A pop-up menu will open in the center display.
2. Roll the control upward or downward to scroll to the desired drive mode and 3. Press the control again to select it. A drive
mode can also be selected by tapping its button on the center display.
Eco CoastEco Coast essentially deactivates engine braking,allowing the vehicle to roll freely. When the driver releases the accelerator pedal, the transmission is automatically disengagedfrom the engine to allow the vehicle to roll as faras possible, which helps reduce fuel consump-tion. This feature is primarily intended to be used in driving situations where the vehicle can roll freely,such as down gentle hills or when a decrease inspeed is expected, such as when approaching anintersection or a traffic light. Eco Coast enables proactive driving with as little braking as possible. Depending on the driving situation, Eco and Eco Coast can be used in different ways to helpreduce fuel consumption: • With Eco activated
: this enables Eco Coast,
which allows the vehicle to roll freely for as
far as possible when the driver releases the
accelerator pedal (e.g., when approaching a traffic light or intersection).
or
• With Eco deactivated
: engine braking can
be used when the vehicle will only roll for

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* Option/accessory.
388 a short distance
(in heavy traffic, etc.) or
when driving down hills .
To help keep fuel consumption as low as possi- ble, Eco Coast should not be used in traffic situa-tions where the brakes have to be used fre-quently.
Activating Eco Coast
Eco Coast is activated when the accelerator pedal is released completely if:
• Eco is activated
• The gear selector is in
D
• The vehicle's speed is between approxi-mately 40 and 87 mph(65 and 140 km/h)Always observe posted speed limits
• The gradient of a down-slope is less thanapproximately 6%
COASTING will appear in the instrument panel
when Eco Coast is being used.
Limitations
Eco Coast is not available if:
• The engine and/or transmission have not reached their normal operating temperature
• Cruise control is activated
• The gear selector is moved from
D to " +/-"
for manual shifting
• The vehicle's speed is not within the40 and 87 mph(65 and 140 km/h) range •
The gradient of a down-slope is more thanapproximately 6%
• The steering wheel paddles
* are used for
manual shifting
Deactivating and turning off Eco Coast
In certain situations, it may be advisable to switch off the Eco Coast function, such as:
• When driving down steep hills, in order to uti-lize engine braking
• Prior to passing another vehicle, in order todo so as safely as possible
Deactivating Eco Coast (and reactivating enginebraking) can be done in the following ways: • Move the gear selector to the manual "
+/–"
position
• Change gears using the steering wheel pad- dles
*
• Press the brake or accelerator pedal
Turn the function off by changing drive modes * or
by turning ECO off in the center display's Func- tion view. The vehicle will roll for short distances even if Eco Coast is turned off to help conserve fuel.However, for the best fuel economy, the functionshould be used as much as possible.
ECO gauge in the instrument panel
Eco gauge 12" instrument panel
Eco gauge 8 instrument panel
The ECO gauge in the instrument panel helps improve driving economy.

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* Option/accessory.389
•
A low reading in the green area indicates economical driving.
• A higher reading indicates higher fuel con-sumption.
The ECO gauge also has an indicator showinghow a "reference" driver would drive in the samesituation. This is indicated by a diamond in thegauge.
Eco climate
In the Eco drive mode, eco climate is automati-
cally activated in the passenger compartment to help minimize energy consumption. To restart the climate system functions that may have been reduced, press the
AUTO or defroster
buttons. In order to return to full functionality for all of the systems that may have been reduced to helpimprove economical driving, select another drivemode or adapt the climate system functions using the
Individual mode to full functionality.
Related information
• Driving economically (p. 364)
• Drive modes
* (p. 384)
• Start/Stop (p. 389)
Start/Stop
Start/Stop is a function that temporarily switches off the engine when the vehicle is not moving,for instance in heavy traffic or at a traffic light, tohelp reduce fuel consumption. The engine startsagain automatically when the brake pedal isreleased.
Start/Stop is one of several fuel-conserving fea- tures that also help reduce emissions. This feature helps make it possible to drive more economically by allowing the engine to auto-stopin certain situations.
Related information
• Conditions for Start/Stop (p. 391)
• Using the Start/Stop function (p. 389)
• ECO drive mode (p. 387)
Using the Start/Stop function Start/Stop is a function that temporarily switches off the engine when the vehicle is not moving,for instance in heavy traffic or at a traffic light, tohelp reduce fuel consumption. The engine startsagain automatically when the brake pedal isreleased.
Start/Stop is available when the engine has been started. The instrument panel will indicate if thefunction is available/unavailable/active. All of the vehicle's normal systems such as light- ing, infotainment, etc., function normally when theengine has auto-stopped. However, certain func-tions, such as climate system blower speed orvery high infotainment system volume, will betemporarily reduced.
Auto-stopThe following conditions must be met for theengine to auto-stop:
• Stop the vehicle by applying the brakes andkeep the brake pedal depressed. The engine will auto-stop. If the COMFORT 4
or ECO driv-
ing modes are activated, the engine can auto-stop before the vehicle has come to astandstill.
If the
Adaptive cruise or Pilot Assist functions
are activated, the engine will auto-stop after
4 The default driving mode.

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STARTING AND DRIVING
390approx. 3 seconds. See also the article "Condi- tions for Start/Stop."
Auto-startThe following conditions must be met for theengine to auto-start:
• Release the brake pedal; the engine willautomatically restart. When starting on anuphill incline, the Hill Start Assist (HSA)function will be activated to help prevent thevehicle from rolling backward.
• When the brake system's Auto Hold functionis activated, the engine will not auto-startuntil the accelerator pedal is pressed.
• When
Adaptive cruise or Pilot Assist are
activated, the engine will auto-start when the accelerator pedal is pressed or if the
button is pressed on the left-side steering wheel keypad.
• Keep the brake pedal depressed but pressthe accelerator pedal. The engine will auto-start.
• On a downhill incline, release the brake pedalso that the vehicle begins to roll. The enginewill auto-start after a slight increase in speed.
Symbols in the instrument panel
12" instrument panel
•READY will be displayed in the tachometer
when Start/Stop is available.
• An indicator in the tachometer will point toward
READY when Start/Stop is active
and the engine has auto-stopped.
•
READY will be grayed-out when Start/Stop
is not available.
• No text will be displayed when Start/Stop is turned off.
Instrument panel when Start/Stop is active and the engine has auto-stopped
8" instrument panel
The symbol is displayed at the bottom of the speedometer.
Symbol
Explanation
White symbol: the function is avail- able.
Beige symbol: the function is active and the engine has auto-stopped.
The function is not available because the conditions have notbeen met.
- No symbol displayed - the function is turned off.
Turning Start/Stop offIn certain situations (e.g., heavy stop-and-go traf- fic), it may be advisable to temporarily turn thisfunction off. To do so:
Tap the
Start/Stop button in
the center display's Function view. The green indicator lightin the button will go out. Start/Stop will remain off until thebutton is tapped again, the driv-ing mode is changed
COMFORT or ECO, or until the engine is restar-ted.

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* Option/accessory.391
Related information
•Conditions for Start/Stop (p. 391)
• Start/Stop (p. 389)
Conditions for Start/Stop
Certain conditions must be met for the Start/ Stop feature to function. If a condition is not met,this will be indicated in the instrument panel.
The engine does not auto-stopIn certain situations or conditions, the engine may not auto-stop when the vehicle comes to a
standstill, such as when:
• the vehicle has not reached a speed of approx. 8 mph (12 km/h) after starting.
• after several auto-stops, the speed mustagain exceed approx. 8 mph (12 km/h)before the next auto-stop.
• the driver's seat belt is unbuckled.
• the main battery's charge is below the mini-mum level.
• the engine has not reached its normal oper-ating temperature.
• the ambient temperature is below approx.23°F (-5°C) or above approx. 85°F (30°C).
• the windshield's heating function
* is acti-
vated.
• the climate system cannot keep the desiredsettings in the passenger compartment.
• the vehicle is backing up.
• the main battery's temperature is above orbelow the permitted limits.
• the driver is turning the steering wheel hard. •
the road's incline is very steep.
• the hood is opened.
• the transmission has not reached its normaloperating temperature.
• driving at high altitude and the engine hasnot reached its normal operating tempera-ture.
• the gear selector is in the manual shiftingposition.
• the ABS brakes have activated.
• hard braking (even if the ABS brakes havenot activated).
• many starts during a short time period havetriggered the starter motor's overheating pro-tection.
• a trailer's electrical system is connected tothe vehicle's electrical system.
The engine does not auto-startIn certain situations or conditions, the engine may not auto-start
after an auto-stop, such as:
• if the driver is not wearing a seat belt
• the gear selector is in the
P position and the
driver's door is open. The engine must be started normally.
The engine auto-starts while the brake pedal is depressed
In the following situations, the engine will auto-
start even though the brake pedal is depressed:

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392•
condensation forms on the inside of the win- dows.
• the climate system cannot keep the desiredsettings in the passenger compartment.
• electrical current consumption is temporarilyhigh or the main battery's charge is belowthe minimum level.
• the brake pedal is pumped repeatedly.
• the hood is opened.
• the vehicle begins to move or increasesspeed slightly (if the engine auto-stoppedbefore the vehicle was at a standstill).
• the driver's seat belt is unbuckled while the gear selector is in the
D or N positions.
• the gear selector is moved from
D to R or ±.
• the driver's door is opened with the gearselector in
D: an audible signal and a text
message will inform the driver that the igni- tion is on.
WARNING
Do not open the hood if the engine has auto- stopped. The engine could suddenly auto-start. Before opening the hood:
• Switch off the ignition by turning the start knob in the tunnel console toward
STOP.
• Be aware that if the engine has been run- ning, components in the engine compart-ment will be very hot.
Related information
• Using the Start/Stop function (p. 389)
Automatic transmission
The automatic transmission has 8 forward gears and shifts up or down based on the level ofacceleration, speed and engine speed (meas-ured in revolutions per minute - rpm). Manualshifting is also possible. The gear indicator in theinstrument panel shows the gear currently beingused or gear shift mode.
CAUTION
The transmission

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Related information
•Gear selector positions (p. 394)
• Gear shift indicator (p. 394)
• Shiftlock (p. 393)
• Steering wheel paddles
* (p. 396)
• All Wheel Drive (AWD) (p. 397)
Shiftlock The automatic transmission's shiftlock feature helps prevent inadvertently moving the gearselector between different positions.
There are two different types of shiftlock: mechanical and automatic.
Mechanical shiftlock
The gear selector can be moved back and forth freely between
N and D. There is a mechanical
shiftlock for the other positions. To move the gear selector to between P, R , N
and D, press the button on the front of the gear
selector (see the illustration).
Automatic shiftlock
From Park – P
In order to move the gear selector from the P
position, the brake pedal must be depressed and the ignition must be in mode II.
From neutral – N
If the gear selector is in N and the vehicle has
been stationary for more than 3 seconds (regard- less of whether or not the engine is running), theshiftlock feature will lock the gear selector in thisposition. In order to move the gear selector from the N
position, the brake pedal must be depressed and the ignition must be in mode II.
Shiftlock override
If the vehicle cannot be driven (e.g., due to a dis- charged battery), the shiftlock feature has to beoverridden in order to move the gear selector