2018 VOLVO XC90 T8 coolant level

OWNER'S INFORMATION
23
If there are no illustrations associated with step- by-step instructions, the steps are indicated byordinary numbers.
Position listsRed circles containing a number are used in general overview illustrations of components.The corresponding number is used in theposition list's description of that component.
Bullet listsBullets are used for items (components, func-tions, information, etc.) that can be listed in a ran-dom order. For example:
• Coolant
• Engine oil
Related informationRelated information offers references to other parts of the manual containing information asso-ciated with the information you are currentlyreading.
ImagesIllustrations and images used in the Owner'sManual are sometimes generic and are intendedto provide an overview or an example of a certainfunction or feature. These images vary dependingon equipment level and market and may differfrom the appearance of your vehicle.
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Related information
• Owner's Manual in the center display (p. 17)
• Owner's manual in mobile devices (p. 20)
• Volvo Cars support site (p. 20)
The Owner's Manual and theenvironment
The Owner's Manual is printed on paper from responsibly managed forests.
The Forest Stewardship Council (FSC) ®
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certifies that the paper pulp in the printed Owner's Manual comes from FSC ®
-certified for-
ests or other responsibly managed sources.
Related information
• Drive-E
‒ purer driving pleasure (p. 27)

CLIMATE CONTROL
236
Parking climate symbols andmessages
A number of symbols and messages related to parking climate may be displayed in the instru-ment panel.
SymbolMessageMeaning
Parking climate Service requiredParking climate is not functioning properly. Contact a workshop A
to have the system checked as
soon as possible.
Parking climate Temporarily unavailableParking climate is temporarily not functioning properly. If the problem persists, contact a workshop A
to have the system checked.
Parking climate Unavailable Charge level too lowThe parking climate cannot be activated because the hybrid battery's charge level is too low to start the high-voltage coolant heater. Charge the battery.
Parking climate Unavailable, not con- nected to power supplyThe parking climate cannot be activated if the charging cable is not connected. Connect the charg- ing cable.
Parking climate Limited Charge level too lowThe parking climate is operating with limited functionality because the hybrid battery's charge level is too low to start the high-voltage coolant heater. Charge the battery.
A An authorized Volvo workshop is recommended.
Related information
• Parking climate (p. 230)

STARTING AND DRIVING
461
•
Speed limiter (p. 278)
• Tire sealing system (p. 572)
Winter driving
It is important to check the vehicle before driving in cold/snowy conditions to make sure it can bedriven safely.
Before the cold season arrives:
• Make sure the engine coolant contains 50% antifreeze. This mixture helps protect theengine from frost erosion down toapprox. -35 °C (-31 °F). Do not mix differenttypes of antifreeze as this could pose ahealth risk.
• Keep the fuel tank well filled to prevent con-densation from forming.
• Check the viscosity of the engine oil. Oil withlow viscosity (thinner oil) improves cold-weather starting and reduces fuel consump-tion when driving with a cold engine.
CAUTION
Low-viscosity oil should not be used with hard driving or in hot weather.
•
Check the condition and charge level of the start battery. Cold weather places greaterdemands on the start battery and reduces itscapacity.
• Use washer fluid containing antifreeze tohelp prevent ice from forming in the washerfluid reservoir.
Slippery driving conditionsFor optimal traction and roadholding, Volvo rec-ommends using snow tires on all wheels when-ever there is a risk of snow or ice on the road.
NOTE
Certain countries require use of winter tires by law. Not all countries permit the use ofstudded tires.
Practice driving on slippery surfaces under con- trolled conditions to learn how the vehicle reacts.
Related information
•Snow tires (p. 571)
• Snow chains (p. 571)
• Braking on salted roads (p. 431)
• Braking on wet roads (p. 431)
• Filling washer fluid (p. 650)
• Start battery (p. 615)
• Replacing windshield wiper blades (p. 648)
• Changing rear window wipers (p. 647)
• Refilling coolant (p. 612)

STARTING AND DRIVING
* Option/accessory.
468
Overheating of engine andtransmission
In demanding driving conditions, such as driving in mountainous areas or hot weather, there is arisk of the engine or transmission overheating,especially when carrying heavy loads.
• Engine power may be temporarily limited.
• Remove any auxiliary lights mounted in front of the grille when driving in hot weather.
• If the temperature in the engine's coolingsystem becomes too high, a warning symbolwill appear in the instrument panel along with the message
Engine temperature High
temperature Stop safely. Pull over to a
safe location and let the engine idle for a few minutes to cool down.
• If the message
Engine temperature High
temperature Turn off engine or Engine
coolant Level low, turn off engine is dis-
played, stop the vehicle and turn off the engine.
• If the transmission begins to overheat, analternative gear shifting program will beselected. An integrated protective functionwill also be activated, the warning symbol will illuminate and the message
Transmission
warm Reduce speed to lower
temperature or Transmission hot Stop
safely, wait for cooling will be displayed in
the instrument panel. Follow the recommen- dations given by reducing speed or stopping the vehicle safely and letting the engine idle for a few minutes to let the transmissioncool.
• If the vehicle begins to overheat, the air con-ditioning may be temporarily switched off.
• After a prolonged period of driving indemanding conditions, do not turn off theengine immediately after stopping.
NOTE
It is normal for the engine's cooling fan to operate for a short time after the engine isswitched off.
Symbols in the instrument panel
SymbolMeaning
High engine temperature. Follow the recommendations provided.
Low coolant level. Follow the rec- ommendations provided.
Transmission hot/overheated/cool- ing. Follow the recommendationsprovided.
Related information
• Refilling coolant (p. 612)
• Driving with a trailer (p. 472)
• Preparing for a long trip (p. 460)
• Gear indicator
* (p. 442)

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MAINTENANCE AND SERVICE
600
Monthly:
•Check cold tire pressure in all tires. Inspect the tires for wear.
• Check that engine coolant and other fluidlevels are between the indicated "min" and"max" markings.
• Clean interior glass surfaces with a glasscleaner and soft paper towels.
• Wipe driver information displays with a softcloth.
• Visually inspect battery terminals for corro-sion. Corrosion may indicate a loose terminalconnector, or a battery near the end of itsuseful service life. Consult your Volvo retailerfor additional information.
As needed:
Wash the car, including the undercarriage, to reduce wear that can be caused by a buildup ofdirt, and corrosion that can be caused by salt res-idues. Clean leaves and twigs from air intake vents at the base of the windshield, and from other placeswhere they may collect.
NOTE
Complete service information for qualified technicians is available online for purchase orsubscription at www.volvotechinfo.com.
Related information
•Vehicle status (p. 602)
• Scheduling service and repairs (p. 603)
• Connecting equipment to the vehicle's data link connector (p. 36)
• Technician certification (p. 37)
• Climate control system service (p. 608)
• Maintenance of the brake system (p. 432)
• Engine compartment overview (p. 609)
Data transfer between vehicle andworkshop over Wi-Fi
Volvo workshops have a designated Wi-Fi net- work for secure data transfer between your vehi-cle and the workshop. Your visit to the workshopwill be easier and more effective when diagnos-tics information and software can be transferredover the workshop's network.
When you arrive at the workshop, your technician can connect your vehicle to the workshop's Wi-Finetwork to perform troubleshooting and down-load software. For this type of communication,the vehicle only connects to the workshop's net-work. The vehicle can only be connected to thedesignated workshop networks, not to any othernetwork, e.g. your home network.
Manual connection to workshop Wi-FiManual connection is usually performed by aservice technician. Because the technician usesthe buttons on your remote key to connect thevehicle, it is important that you bring a key withbuttons when taking the vehicle in to a workshop.Pressing the lock button on the remote key threetimes will connect the vehicle to the workshop'sWi-Fi network. When the car is connected to a Wi-Fi network, the
symbol appears in the center display.

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MAINTENANCE AND SERVICE
612
NOTE
If the conditions for measuring oil level are not properly fulfilled (time after engine shut-down, vehicle inclination, ambient tempera- ture, etc.) the message
No value availablewill be shown in the center display. This does not mean that anything is wrong in the vehi-
cle systems.
Related information
• Engine oil (p. 610)
• Engine oil specifications (p. 662)
• Ignition modes (p. 427)
• Vehicle status (p. 602)
Refilling coolant
Coolant helps keep the combustion engine at the right operating temperature. The heat trans-ferred from the engine to the coolant can beused to warm the passenger compartment.
When refilling coolant, follow the instructions on the package. Never fill the cooling system withonly water. The risk of freezing is increased withtoo low or too high amounts of coolant. If there is coolant under the vehicle, smoke from the cooling system, or if more than 2 liters (about2 quarts) of coolant has been added to the sys-tem, there could be something wrong with thecooling system and starting the vehicle coulddamage the engine. Call a tow truck and do notattempt to start the engine.
WARNING
The coolant may be very hot. Never unscrew the cap when the coolant is hot. If coolantmust be filled, unscrew the expansion tankcap slowly to relieve overpressure.
Coolant expansion tank.

MAINTENANCE AND SERVICE
}}
* Option/accessory.613
Lift the rubber strip by pressing it inward into the engine compartment.
Remove the plastic cover by folding out the catch and lifting the cover upward.
Unscrew the expansion tank cap and fill coolant as needed. The level should be between the MIN and MAX marks on the
expansion tank.
CAUTION
• Mix the coolant with water of acceptable quality. If you are unsure of the quality ofthe water, use a Volvo-recommendedpremixed coolant.
• Make sure the coolant mixture is 50%water and 50% coolant.
• Only use coolants with corrosion protec-tion recommended by Volvo.
• To help ensure sufficient corrosion pro-tection in the system, only use new cool-ant when replacing larger components inthe cooling system.
• Never run the engine unless the coolingsystem is properly filled. An improperlyfilled cooling system could lead to hightemperatures and cracks in the cylinderheads.
• High levels of chlorine, chlorides andother salts may cause corrosion in thecooling system.
Related information
•
Engine compartment overview (p. 609)
• Coolant specifications (p. 663)
Replacing bulbs
Halogen headlights are not available on all mod- els and markets. Contact a Volvo retailer formore information. LED 13
bulbs must be replaced by a workshop.
An authorized Volvo workshop is recommended.
NOTE
For information on lights not mentioned in this article, contact a Volvo dealer or a certi-fied Volvo service technician.
NOTE
Exterior lighting such as headlights and tail- lights may develop temporary condensationon the inside of the lens. This is normal. Allexterior lighting is designed to resist this.Condensation is normally vented out of thelamp housing once the light has been lit forsome period of time.
NOTE
Bulbs for active curve lighting * contain traces
of mercury and should therefore always be submitted to a certified Volvo service techni-cian.
13 LED (Ligth Emitting Diode)

MAINTENANCE AND SERVICE
619
Hybrid battery
The vehicle's electric motor is powered by a rechargeable, maintenance-free, lithium-ionhybrid battery.
NOTE
The vehicle cannot be started if the hybrid battery is discharged.
NOTE
If both the starter battery and the hybrid bat- tery are discharged, both batteries must be
charged. In such cases, it is not possible to charge only the hybrid battery first. The starter battery must have a certain level of charge for it to be possible to charge thehybrid battery.
WARNING
Hybrid battery replacement may only be per- formed by a workshop – an authorized Volvoworkshop is recommended.
CoolantThe hybrid battery's cooling system has its own expansion tank.
CAUTION
Filling the hybrid battery coolant should only be performed by a workshop – an authorizedVolvo workshop is recommended.
SpecificationsType: Lithium-ion
Power reserve: 10.4 kWh.
NOTE
The capacity of the hybrid battery decreases with age and use, which could result inincreased use of the combustion engine,leading to higher fuel consumption andreduced electric motor range.
Related information
•Battery symbols (p. 620)
• Start battery (p. 615)
• Charging the hybrid battery (p. 407)