2019 VOLVO S90 TWIN ENGINE coolant temperature

CLIMATE CONTROL
232
Heater
The heater helps the engine and passengercompartment reach the correct temperaturebefore 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 ismounted in the front right-side wheel housing.

Battery and charging
The heater is powered by the vehicle's hybrid bat-tery. If the charge level in the hybrid battery is toolow, the heater will switch off automatically and amessage will be displayed in the instrumentpanel.

NOTE
Make sure that the battery has sufficientcharge if the heater must be used.

Related information
Climate (p. 196)
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 ofthe vehicle's heater. The heater is mounted in thefront right-side wheel housing.
The parking heater starts automatically if theparking climate's preconditioning is activated andthe passenger compartment needs to be heated.
It switches off automatically when a set timertime or the heater's maximum run time expires, orif the car is restarted.
The heater's maximum running time is 40minutes.
Additional heater
The auxiliary heater helps heat the passengercompartment and engine while driving.
The auxiliary heater is one of two sub-functionsof the vehicle's heater. The heater is mounted inthe front right-side wheel housing.
The auxiliary heater is started and controlledautomatically when extra heat is required whilethe vehicle is being driven.
It switches off automatically when the ignition isswitched off.

STARTING AND DRIVING
465
Overheating of engine andtransmission
In demanding driving conditions, such as drivingin 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 frontof 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 withthe message Engine temperature Hightemperature Stop safely. Pull over to asafe location and let the engine idle for a fewminutes to cool down.
If the message Engine temperature Hightemperature Turn off engine or Enginecoolant Level low, turn off engine is dis-played, stop the vehicle and turn off theengine.
If the transmission begins to overheat, analternative gear shifting program will beselected. An integrated protective functionwill also be activated, the warning symbol willilluminate and the message Transmissionwarm Reduce speed to lowertemperature or Transmission hot Stopsafely, wait for cooling will be displayed inthe instrument panel. Follow the recommen-dations given by reducing speed or stopping
the vehicle safely and letting the engine idlefor 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 tooperate for a short time after the engine isswitched off.

Symbols in the instrument panel
Symbol Meaning
High engine temperature. Followthe recommendations provided.
Low coolant level. Follow the rec-ommendations provided.
Transmission hot/overheated/cool-ing. Follow the recommendationsprovided.
Related information
Refilling coolant (p. 599)
Preparing for a long trip (p. 457)

MAINTENANCE AND SERVICE
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599

NOTE
If the conditions for measuring oil level arenot 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 doesnot mean that anything is wrong in the vehi-cle systems.

Related information
Engine oil (p. 597)
Engine oil specifications (p. 646)
Ignition modes (p. 429)
Vehicle status (p. 588)
Refilling coolant
Coolant helps keep the combustion engine atthe 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 onthe 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 fromthe 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 unscrewthe cap when the coolant is hot. If coolantmust be filled, unscrew the expansion tankcap slowly to relieve overpressure.
Coolant expansion tank, left-hand drive vehicle.

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MAINTENANCE AND SERVICE
* Option/accessory.600
Unscrew the cover in the plastic covering.
Unscrew the expansion tank cap and fillcoolant as needed. The level should notexceed the yellow MAX mark inside theexpansion tank.
Put the components back in place in the reverseorder.

CAUTION
Do not ingest the contents. May causedamage to organs (kidneys).
Use premixed coolant according to Vol-vo's recommendations. If concentratedcoolant 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 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. 596)
Coolant specifications (p. 647)
Replacing bulbs
Halogen headlights are not available on all mod-els and markets. Contact a Volvo retailer formore information.
LED14 bulbs must be replaced by a workshop.An authorized Volvo workshop is recommended.

NOTE
For information on lights not mentioned inthis 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 tracesof mercury and should therefore always besubmitted to a certified Volvo service techni-cian.

INDEX
653
Charging
hybrid battery 409
opening and closing the charging
door 414
start charging 415
Status 417, 419
stop charging 421
Charging cable 411
Charging current 411
Checking engine oil level 598
Child restraints 63, 65
booster cushions 71
convertible seats 69
infant seats 67
ISOFIX/LATCH anchors 74
lower attachment points 73
recalls and registration 65
top tether anchors 72
Child safety 63
Child safety locks 259
Circuit breaker 413
City Safety 333, 334, 336, 337, 343, 345
City Safety braking for oncoming vehicles 342
City Safety in crossing traffic 339, 340
City Safety when evasive maneuver preven-
ted341
Cleaning621, 623, 624
automatic car wash627
car wash624, 625, 627, 628, 629, 630
center display619
Seat belts621
textile upholstery619, 621, 622
upholstery 619, 621, 622, 623, 624
wheels630
Cleaning wheels630
Cleaning wiper blades628
Clean Zone199
Clean Zone Interior Package199
Climate196
auto-regulation214
blower control219, 220
parking224
perceived temperature197
Sensors196
temperature control221, 222
voice control197
zones196
Climate controls207
center display207
rear seat207
Climate system196, 207
Refrigerant648
repairs595
Clock, setting89
Collision42, 47, 52, 61
Collision warner
detection of pedestrians337
radar sensor324
Collision warning333, 346
Color code, paintwork632
Color codes632
Compass474
calibration475
Condensation in headlights625, 627,
628, 629
Connecting vehicle to Internet
No connection or poor connection 528
via a mobile device (WiFi)525
via cellular phone (Bluetooth) 525
via vehicle's modem526
Connect phone515
Contact information26
Convertible seats69
coolant647
Coolant, filling599
Cooling system
overheating465
Corner Traction Control271
Corrosion protection630
Crash, see Collision42

INDEX
655
Engine
automatic start and stop of combustion
engine 445
overheating 465
start 426
turn off 428
Engine braking 431, 440
Engine compartment
coolant 599
engine oil 597
overview 596
Engine drag control 271
Engine oil 597
filling 598
filter 597
grade and volume 646
Engine shutdown 428
Engine specifications 645
Engine temperature
high 465
Environment 27
Error messages
Adaptive Cruise Control 306
see Messages and symbols 306, 322
Error messages in BLIS 351
Ethanol content
max. 10% by volume 461
Exterior dimensions641
Extra heater (Auxiliary heater)232
F
Federal Clean Air Act584
Ferry transport451
Flat tire564
Flooded road 458
Fluids, volumes 635, 648
Fluids and oils 647, 648
Fog lights
rear 155
Four-C 451
Front seat
blower 219
climate 207
heating 209, 210
temperature 221
ventilation 211
Front seat manual 180
Front seats, power 181
adjusting passenger seat from driver's
seat 188
adjusting seat 181
Lumbar support 187
massage184, 185
multifunction control 184, 185, 186, 187
Side bolsters186
store position 182, 183
Fuel 461
Travel Link service 498
Fuel filling 460
Fuel gauge 83
Fuel requirements 461, 462
Fuel tank
volume 648
Fuse box 607
Fuses
below the glove compartment 612
general 606
in engine compartment 608
in trunk 615
replacing 607
G
Gasoline grade461
Gauge
fuel gauge83
Gear selector positions
automatic transmission440