2017 VOLVO XC90 TWIN ENGINE HYBRID engine

STARTING AND DRIVING
402
Battery drain
Your vehicle's electrical functions drain the bat-tery to varying extents.
Avoid using ignition mode II as much as posssi-ble, or electrical functions that require a greatdeal of electrical current when the engine is notrunning.
Using ignition mode I whenever possible con-sumes less electrical current.
Functions that require a great deal of electricalcurrent include:
•the climate system blower
•headlights
•wipers
•infotainment system (especially at high vol-ume).
If the battery's charge level is low, a text messagewill appear in the instrument panel. The vehicle'senergy-saving function will then turn off orreduce certain functions that are currently con-suming electrical current.
If the battery needs to be recharged, start theengine and let it idle for at least 15 minutes ordrive the vehicle (driving charges the batteryfaster than letting the engine idle).

Related information
•Ignition modes (p. 400)
Starting the engine
The engine can be started using the start knobon the tunnel console if there is a remote key inthe passenger compartment.
Start knob in the tunnel console between the front seats
WARNING
Before starting the engine:
•Fasten the seat belt.
•Check that the seat, steering wheel andmirrors are adjusted properly.
•Make sure the brake pedal can bedepressed completely. Adjust the seat ifnecessary.
To start the engine.
1.A remote key must be in the passenger com-partment. On models with the standardPassive Start, the key has to be in the frontsection of the passenger compartment. If thevehicle is equipped the optional PassiveEntry system (keyless locking/unlocking) thekey can be anywhere in the vehicle.
2.Press firmly on the brake pedal2.
3.Turn the start knob toward START andrelease it to start the engine.
> The starter motor will crank until theengine starts or its overheating protectionis triggered.
2If the vehicle is moving, it is only necessary to turn the start knob toward START to start the engine.

STARTING AND DRIVING
}}
403

WARNING
•Never use more than one floor mat at atime on the driver's floor. Before driving,remove the original mat from the driver'sseat floor before using any other type offloor mat. Any mat used in this positionshould be securely and properly anchoredin the attaching pins. An extra mat on thedriver's floor can cause the acceleratorand/or brake pedal to catch. Check thatthe movement of these pedals is notimpeded.
•Volvo's floor mats are specially manufac-tured for your car. They must be firmlysecured in the clips on the floor so thatthey cannot slide and become trappedunder the pedals on the driver's side.
During normal starts, the electric motor is priori-tized and the gasoline engine will not start. Thismeans that when the start knob has been turnedtoward START and released, the electric motor isactivated ("started") and the vehicle is ready tobe driven. The warning and information symbolsin the instrument panel will go out and thechosen theme will be displayed to indicate thatthe electric motor has been activated.
However, in certain situations, such as in coldweather or if the hybrid battery is not sufficientlycharged, the gasoline engine will start instead.
NOTE
The vehicle cannot be started if the hybridbattery is discharged.
Back-up reader in the tunnel console
If Vehicle key not found is displayed in theinstrument panel, place the remote key in theback-up reader in the tunnel console (see theillustration) and try again to start the engine.

NOTE
When the remote key is in the back-upreader, be sure there are no other metallicobjects (e.g., other keys, coins, cell phones) inthe cup holder. This could affect the back-upreader's function.
If Vehicle start System check, wait is dis-played in the instrument panel when you try to
start the vehicle, wait until the message is nolonger displayed and try to start again.
CAUTION
If the engine does not start after the third try,wait for approximately 3 minutes before tryingto start it again to give the battery time torecover its starting capacity.

WARNING
•Always remove the remote key from thepassenger compartment when leaving thevehicle and ensure that the ignition inmode 0.
•On vehicles with the optional PassiveEntry, never remove the remote key fromthe vehicle while it is being driven ortowed.
•Always place the gear selector in Parkand apply the parking brake before leav-ing the vehicle. Never leave the vehicleunattended with the engine running.
•Always open garage doors fully beforestarting the engine inside a garage toensure adequate ventilation. The exhaustgases contain carbon monoxide, which isinvisible and odorless but very poisonous.

||
STARTING AND DRIVING
404

NOTE
After a cold start, idle speed may be noticea-bly higher than normal for a short period. Thisis done to help bring components in theemission control system to their normal oper-ating temperature as quickly as possible,which enables them to control emissions andhelp reduce the vehicle's impact on the envi-ronment.

CAUTION
•When starting in cold weather, the auto-matic transmission may shift up at slightlyhigher engine speeds than normal untilthe automatic transmission fluid reachesnormal operating temperature.
•Do not race a cold engine immediatelyafter starting. Oil flow may not reachsome lubrication points fast enough toprevent engine damage.
•The engine should be idling when youmove the gear selector. Never accelerateuntil after you feel the transmissionengage. Accelerating immediately afterselecting a gear will cause harsh engage-ment and premature transmission wear.
•Selecting P or N when idling at a stand-still for prolonged periods of time will helpprevent overheating of the automatictransmission fluid.
Related information
•Ignition modes (p. 400)
•Turning the engine off (p. 404)
•Changing the remote key's battery (p. 235)
•Jump starting (p. 395)
Turning the engine off
The engine can be turned off using the startknob on the tunnel console.
Start knob in the tunnel console between the front seats
To turn off the engine:
–Turn the start knob toward STOP andrelease it to switch the engine off.
If the gear selector is in P or if the vehicle is mov-ing:
–Hold the knob in the STOP position until theengine stops.

Related information
•Starting the engine (p. 402)
•Ignition modes (p. 400)

STARTING AND DRIVING
}}
405
Driving systems
The XC90 T8 Twin Engine Plug-in Hybrid is aparallel hybrid, which means that it has two sep-arate drive systems: an electric motor and a gas-oline engine. Depending on the drive modeselected and the amount of electric power avail-able in the hybrid battery, the two systems canbe used in tandem or separately.

Two drive systems
A control system coordinates both of the drivesystems to help optimize driving economy.
Hybrid battery
Gasoline engine
High voltage generator3
Electric motor
The gasoline engine and electric motor both gen-erate power directly to the wheels. The gasolineengine can also charge the hybrid battery using aspecial high-voltage generator.
Related information
•Drive modes (p. 420)
•Charging the hybrid battery (p. 413)
•General information about the XC90 T8 TwinEngine Plug-in Hybrid (p. 16)
•Parking climate (preconditioning) (p. 189)
Hybrid battery charging cable
The charging cable is used to recharge yourvehicle's hybrid battery. Only use the cable provi-ded with your vehicle or one purchased from aVolvo retailer.
The charging cable is stowed in a storage compartmentunder the cargo area floor

WARNING
Only use the charging cable provided withyour vehicle or a replacement cable pur-chased from a Volvo retailer.
3Combined generator and starter motor (Crank Integrated Starter Generator).

STARTING AND DRIVING
408
Hybrid-related symbols andmessages
A number of symbols and messages relating tothe XC90 T8 Twin Engine Plug-in Hybrid may
appear in the instrument panel. They may alsobe displayed in combination with general indica-tor and warning symbols and will go out whenthe necessary action has been taken.
SymbolMessageExplanation
12 V Battery
Charging fault, service urgent. Driveto workshop
Battery fault. Contact a Volvo retailer or a trained and qualified Volvo service technician as soon aspossible.
12 V Battery
Charging fault Stop safely
Battery fault. Stop the vehicle as soon as possible and contact a Volvo retailer or a trained andqualified Volvo service technician.
12 V Battery
Low charge, temporarily reducedfunctionality
The hybrid battery's charge level is too low for optimal driving. Charge the battery as soon as possi-ble.
12 V Battery
Charging fault, low battery. Stopsafely
The hybrid battery is not sufficiently charged. Stop the vehicle as soon as possible and charge thebattery.
12 V Battery
Fuse failure Service required
Battery failure. Contact a Volvo retailer or a trained and qualified Volvo service technician as soon aspossible to have the system checked.
Hybrid battery
Overheated, stop safely
Battery temperature too high/too low. Stop the vehicle and turn off the engine. If the messageremains after the engine has been restarted, contact a Volvo retailer or a trained and qualified Volvoservice technician.

STARTING AND DRIVING
409
SymbolMessageExplanation
Reduced performance
Max vehicle speed limited
The hybrid battery is not sufficiently charged for higher speeds. Charge the battery as soon as pos-sible.
Hybrid system
Harsh behavior at low speed, vehicleok to use
The hybrid system is not functioning completely properly. Contact a Volvo retailer or a trained andqualified Volvo service technician as soon as possible to have the system checked.
Hybrid system failure
Service required
The hybrid system is out of order. Contact a Volvo retailer or a trained and qualified Volvo servicetechnician as soon as possible to have the system checked.
Charge cable
Remove before start
The charging cable has not been disconnected and the driver has attempted to start the engine.Disconnect the cable from the vehicle, put the cover back in place and close the charger door.
Charge cable
Removed? Turn and hold start knob7s
The driver has already attempted to start the engine with the charging cable still connected. Besure the cable is completely disconnected, the cover is in place and the charger door is closed.

Related information
•Charging the hybrid battery (p. 413)
•Charger status indicators (p. 417)
•Hybrid battery charge status (p. 415)

STARTING AND DRIVING
}}
413
4.The charging cable's coupler will lock ontothe charging socket and charging will beginwithin approx. 10 seconds. The approximateremaining charging time and charging statuswill be displayed in the instrument panel. Seealso the article "Hybrid battery charge sta-tus."
Charging will be temporarily interrupted if thevehicle is unlocked:
•If a door is opened, charging will restartwithin 2 minutes.
•if no door is opened, the vehicle will auto-matically relock and charging will restartafter 1 minute.

NOTE
Charging status is shown in the instrumentpanel, which goes dark after a period of time.Reactivate the instrument panel by:
•pressing the brake pedal
•opening one of the doors
•putting the ignition in mode I (withoutpressing the brake pedal, turn the startknob to START and release it).
CAUTION
Never disconnect the charging cable from the120-/240-volt socket while charging is inprogress. This could damage the socket.
Always stop the charging process (by unlock-ing the vehicle) and disconnect the chargingcable from the vehicle's charging socketbefore disconnecting the other end from the120-/240-volt socket being used.
During the charging process, condensation mayform under the vehicle, which is normal and iscaused by cooling the hybrid battery.

Related information
•Hybrid battery charge status (p. 415)
•Charging the hybrid battery (p. 413)
•Hybrid battery charging cable (p. 405)
•Stopping hybrid battery charging (p. 411)
Charging the hybrid battery
In addition to the conventional fuel tank, theXC90 T8 Twin Engine Plug-in Hybrid is alsoequipped with a rechargeable lithium-ion hybridbattery.
The hybrid battery is recharged using a chargingcable located in a storage compartment underthe floor of the cargo area. See also the article"Charging cable."
WARNING
The hybrid electrical system in your vehicleuses high voltage electrical current. Any dam-age to this system or to the hybrid batterymay result in the danger of overheating, fire,or serious injury. If the vehicle is involved in acollision or is subjected to flooding, fires, etc.,have it inspected by a trained and qualifiedVolvo service technician. Prior to this inspec-tion, the vehicle should be parked outdoors ata safe distance from any building or poten-tially flammable materials.
The hybrid battery's charging time depends onthe charging current used.

||
STARTING AND DRIVING
414

NOTE
The capacity of the hybrid battery diminishessomewhat with age and use, which couldresult in increased use of the gasoline engineand consequently, slightly higher fuel con-sumption.
Charging is indicated in three ways:
•Charge module (the unit that is plugged intothe wall socket): The blue indicator light onthe cable's charge module will flash red sev-eral times when the unit is plugged into awall socket while a safety check is being per-formed and will then glow steadily blue toindicate that the charger is ready to use.
•A green indicator light in the vehicle's charg-ing socket will flash green while the batteryis charging and will glow steadily green whenthe hybrid battery is fully charged. The blueindicator light in the charge module will alsoflash while charging is underway and willglow steadily blue when charging is comple-ted.
•A gauge in the instrument panel will alsoindicate the battery's charge level.
The hybrid battery charging process also chargesthe vehicle's start battery.
If the hybrid battery's temperature is below –13 ºF (–10 ºC) or above +104 ºF (+40 ºC), someof the vehicle's functions may be reduced or not
be available at all (e.g., drive mode may not beavailable).
The electric motor cannot be used if the hybridbattery's temperature is too low or too high. If thePURE drive mode is selected, the gasolineengine will be used.

Temperature control
During charging, if the temperature in the charg-ing cable becomes too high and reaches a criticallimit, charging will be interrupted.

CAUTION
If charging is interrupted repeatedly, have thecharging cable and the vehicle's chargingsystem inspected by a trained and qualifiedVolvo service technician.
Charging using the gasoline engine
Current is generated to charge the hybrid battery, suchas light braking and when engine braking on down-slopes
Using the B gear mode when driving on down-slopes will also recharge the hybrid battery.
The hybrid battery can also be charged by thegasoline engine. During light braking, the batteryis recharged.

Related information
•Drive modes (p. 420)
•General information about the XC90 T8 TwinEngine Plug-in Hybrid (p. 16)
•Hybrid battery charging cable (p. 405)
•Gear selector positions (p. 425)