2019 VOLVO XC90 TWIN ENGINE coolant temperature

CLIMATE CONTROL
239
Heater
The heater helps the engine and passenger
compartment reach the correct temperature
before and while driving.
The heater has two sub-functions: Parking heater - heats the passenger com-
partment as needed when the parking cli-
mate's preconditioning is activated.
Auxiliary heater - heats the passenger com-
partment and engine while driving.
The heater is a high-voltage coolant heater and is
mounted in the front right-side wheel housing.
Battery and chargingThe heater is powered by the vehicle's hybrid bat-
tery. If the charge level in the hybrid battery is too
low, the heater will switch off automatically and a
message will be displayed in the instrument
panel.
NOTE Make sure that the battery has sufficient
charge if the heater must be used.
Related information

Climate (p. 204) Parking heater
The parking heater heats the passenger com-
partment as needed before driving if precondi-
tioning is activated.
The parking heater is one of two sub-functions of
the vehicle's heater. The heater is mounted in the
front right-side wheel housing.
The parking heater starts automatically if the
parking climate's preconditioning is activated and
the passenger compartment needs to be heated.
It switches off automatically when a set timer
time or the heater's maximum run time expires, or
if the car is restarted.
The heater's maximum running time is 40
minutes. Additional heater
The auxiliary heater helps heat the passenger
compartment and engine while driving.
The auxiliary heater is one of two sub-functions
of the vehicle's heater. The heater is mounted in
the front right-side wheel housing.
The auxiliary heater is started and controlled
automatically when extra heat is required while
the vehicle is being driven.
It switches off automatically when the ignition is
switched off.

STARTING AND DRIVING
}}
479
Emission controls
Three-way catalytic converter

Keep your engine properly tuned. Certain
engine malfunctions, particularly involving the
electrical, fuel or distributor ignition systems,
may cause unusually high three-way catalytic
converter temperatures. Do not continue to
operate your vehicle if you detect engine
misfire, noticeable loss of power or other
unusual operating conditions, such as engine
overheating or backfiring. A properly tuned
engine will help avoid malfunctions that
could damage the three-way catalytic con-
verter.
Do not park your vehicle over combustible
materials, such as grass or leaves, which can
come into contact with the hot exhaust sys-
tem and cause such materials to ignite under
certain wind and weather conditions.
Excessive starter cranking (in excess of one
minute), or an intermittently firing or flooded
engine can cause three-way catalytic con-
verter or exhaust system overheating.
Remember that tampering or unauthorized
modifications to the engine, the Engine Con-
trol Module, or the vehicle may be illegal and
can cause three-way catalytic converter or
exhaust system overheating. This includes:
altering fuel injection settings or compo-
nents, altering emission system components or location or removing components, and/or
repeated use of leaded fuel.NOTE Unleaded fuel is required for vehicles with
three-way catalytic converters.
Heated oxygen sensorsThe heated oxygen sensors monitor the oxygen
content of the exhaust gases. Readings are fed
into a control module that continuously monitors
engine functions and controls fuel injection. The
ratio of fuel to air into the engine is continuously
adjusted for efficient combustion to help reduce
harmful emissions.
Related information

Octane rating (p. 477)
Fuel (p. 476) Overheating of engine and
transmission
In demanding driving conditions, such as driving
in mountainous areas or hot weather, there is a
risk 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 cooling
system becomes too high, a warning symbol
will 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, an
alternative gear shifting program will be
selected. An integrated protective function
will 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

||STARTING AND DRIVING
480
the vehicle safely and letting the engine idle
for a few minutes to let the transmission
cool.
If the vehicle begins to overheat, the air con-
ditioning may be temporarily switched off.
After a prolonged period of driving in
demanding conditions, do not turn off the
engine immediately after stopping.
NOTE It is normal for the engine's cooling fan to
operate for a short time after the engine is
switched off.
Symbols in the instrument panel
Symbol
Meaning High engine temperature. Follow
the recommendations provided.
Low coolant level. Follow the rec-
ommendations provided.
Transmission hot/overheated/cool-
ing. Follow the recommendations
provided.
Related information

Refilling coolant (p. 625)
Driving with a trailer (p. 483)
Preparing for a long trip (p. 472) Battery drain
The electrical functions in the vehicle drain the
battery to varying degrees. Avoid using ignition
mode II when the engine is switched off. Use
ignition mode I instead, as this uses less electri-
cal current.
Note that certain accessories may also drain
power from the electrical system. Do not use
functions that use a lot of electrical current when
the engine is turned off. Examples of such func-
tions are: blower
headlights
windshield wipers
audio system (especially at high volume).
If the starter battery voltage is low, a message is
shown in the driver display. The vehicle's energy-
saving function will then turn off or reduce certain
functions, such as the blower and/or the audio
system.
– Charge the battery by starting the engine
and let it run for at least 15 minutes (driving
charges the battery faster than letting the
engine idle).
Related information
Start battery (p. 627)
Ignition modes (p. 437)

MAINTENANCE AND SERVICE
}}
625
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 available
will be shown in the center display. This does
not mean that anything is wrong in the vehi-
cle systems.
Related information
Engine oil (p. 623)
Engine oil specifications (p. 672)
Ignition modes (p. 437)
Vehicle status (p. 614) Refilling coolant
Coolant helps keep the combustion engine at
the right operating temperature. The heat trans-
ferred from the engine to the coolant can be
used to warm the passenger compartment.
When refilling coolant, follow the instructions on
the package. Never fill the cooling system with
only water. The risk of freezing is increased with
too 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 (about
2 quarts) of coolant has been added to the sys-
tem, there could be something wrong with the
cooling system and starting the vehicle could
damage the engine. Call a tow truck and do not
attempt to start the engine.
WARNING The coolant may be very hot. Never unscrew
the cap when the coolant is hot. If coolant
must be filled, unscrew the expansion tank
cap slowly to relieve overpressure. Coolant expansion tank.

||MAINTENANCE AND SERVICE
* Option/accessory.
626 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
Do not ingest the contents. May cause
damage to organs (kidneys).
Use premixed coolant according to Vol-
vo's recommendations. If concentrated
coolant is used, make sure that the cool-
ant mixture is 50% coolant and 50%
water of acceptable quality.
Do not mix different types of coolant.
To help ensure sufficient corrosion pro-
tection in the system, only use new cool-
ant when replacing larger components in
the cooling system.
Never run the engine unless the cooling
system is properly filled. An improperly
filled cooling system could lead to high
temperatures and cracks in the cylinder
heads.
High levels of chlorine, chlorides and
other salts may cause corrosion in the
cooling system.
Related information
Engine compartment overview (p. 622)
Coolant specifications (p. 673) Replacing bulbs
Halogen headlights are not available on all mod-
els and markets. Contact a Volvo retailer for
more information.
LED 14
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 condensation
on the inside of the lens. This is normal. All
exterior lighting is designed to resist this.
Condensation is normally vented out of the
lamp housing once the light has been lit for
some 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. 14
LED (Light Emitting Diode)

INDEX
679
Charge
vehicle function 471
Charge level vehicle function 471
Charging hybrid battery 417
opening and closing the charging
door 422
start charging 423
Status 425, 427
stop charging 429
Charging cable 419
Charging current 419
Checking engine oil level 624
Child restraints 63, 65 booster cushions 71
convertible seats 69
infant seats 67
integrated booster cushion 76
ISOFIX/LATCH anchors 74
lower attachment points 74
recalls and registration 65
top tether anchors 72
Child safety 63
Child safety locks 264
Circuit breaker 421
City Safety 341, 342, 344, 345, 351, 353 City Safety braking for oncoming vehicles 350
City Safety in crossing traffic

347, 348
City Safety when evasive maneuver preven-
ted 349
Cleaning 647, 649, 650
automatic car wash 653
car wash 650, 651, 653, 654, 655, 656
center display 645
Seat belts 647
textile upholstery 645, 647, 648
upholstery 645, 647, 648, 649, 650
wheels 656
Cleaning wheels 656
Cleaning wiper blades 654
Clean Zone 207
Clean Zone Interior Package 208
Climate 204
auto-regulation 220
blower control 226
parking 231
perceived temperature 205
Sensors 204
temperature control 228, 229
voice control 205
zones 204
Climate controls 215
center display 215
rear seat 215 Climate system
204, 215
Refrigerant 674
repairs 621
Clock, setting 93
Collision 42, 47, 52, 61
Collision warner detection of pedestrians 345
radar sensor 332
Collision warning 341, 354
Color code, paintwork 658
Color codes 658
Compass 493 calibration 493
Condensation in headlights 651, 653, 654, 655
Connecting vehicle to Internet No connection or poor connection 546
via a mobile device (WiFi) 543
via cellular phone (Bluetooth) 543
via vehicle's modem 544
Connect phone 533
Contact information 26
Convertible seats 69
coolant 673
Coolant, filling 625

INDEX
681
Electric parking brake 442
Electronic immobilizer 257
emergency brake lights 160
Emission inspection readiness 610
Energy distribution
using map data 460
Engine automatic start and stop of combustion
engine 454
overheating 479
start 434
turn off 436
Engine braking 439, 449, 466
Engine compartment coolant 625
engine oil 623
overview 622
Engine drag control 279
Engine oil 623 filling 624
filter 623
grade and volume 672
Engine shutdown 436
Engine specifications 671
Engine temperature high 479
Environment 27 Error messages
Adaptive Cruise Control
314
see Messages and symbols 314, 330
Error messages in BLIS 359
Ethanol content max. 10% by volume 476
Exterior dimensions 667
Extra heater (Auxiliary heater) 239
F Federal Clean Air Act
610
Ferry transport
461
Flat tire 582
Flooded road 473
Fluids, volumes 662, 674
Fluids and oils 673, 674
Fog lights rear 159
Four-C 461
Front seat blower 226
climate 215
heating 217, 218
temperature 228
ventilation 219 Front seat manual
184
Front seats, power
185
adjusting passenger seat from driver's
seat 192
adjusting seat 185
Lumbar support 191
massage 188, 189
multifunction control 188, 189, 190, 191
Side bolsters 190
store position 186, 187
FSC, environmental labeling 24
Fuel 476
Travel Link service 516
Fuel filling 475
Fuel gauge 87
Fuel requirements 476, 477
Fuel tank volume 674
Fuse box 633
Fuses below the glove compartment 638
general 632
in engine compartment 634
in the cargo compartment 641
replacing 633