coolant temperature VOLVO S90 TWIN ENGINE 2020 Owners Manual

CLIMATE CONTROL
231
HeaterThe heater has two sub-functions that help warm the passenger compartment or enginein various situations.
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 passengercompartment and engine while driving.
The heater is a high-voltage coolant heaterand is mounted in the front right-side wheelhousing.
Battery and chargingThe heater is powered by the vehicle's hybridbattery. If the charge level in the hybrid batteryis too low, the heater will switch off automati-cally and a message will be displayed in theinstrument panel.
NOTE
Make sure that the battery has sufficient charge if the heater must be used.
Related information
Climate (p. 198)
Parking heater (p. 231)
Additional heater (p. 231)
Parking heater
The parking heater heats the passenger com- partment as needed before driving if precon-ditioning is activated.
The parking heater is one of two sub-functions of the vehicle's heater. The heater is mountedin the front right-side wheel housing. The parking heater starts automatically if the parking climate's preconditioning is activatedand the passenger compartment needs to beheated. Heater running time varies depending on fac- tors such as battery charge level, passengercompartment temperature and ambient tem-perature, but it will never run for longer than40 minutes.
Related information
Heater (p. 231)
Additional heater (p. 231)
Additional heater
The auxiliary heater helps heat the passenger compartment and engine while driving.
The auxiliary heater is one of two sub-func- tions of the vehicle's heater. The heater ismounted in the front right-side wheel housing. The auxiliary heater is started and controlled automatically when extra heat is requiredwhile the vehicle is being driven. It switches off automatically when the ignition is switched off.
Related information
Heater (p. 231)
Parking heater (p. 231)
Activating and deactivating the auxiliaryheater (p. 232)

STARTING AND DRIVING
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439
Emission controls
Three-way catalytic converter
Keep your engine properly tuned. Certain engine malfunctions, particularly involvingthe electrical, fuel or distributor ignitionsystems, may cause unusually high three-way catalytic converter temperatures. Donot continue to operate your vehicle if youdetect engine misfire, noticeable loss ofpower or other unusual operating condi-tions, such as engine overheating or back-firing. A properly tuned engine will helpavoid malfunctions that could damage thethree-way catalytic converter.
Do not park your vehicle over combustiblematerials, such as grass or leaves, whichcan come into contact with the hotexhaust system and cause such materialsto ignite under certain wind and weatherconditions.
Excessive starter cranking (in excess ofone minute), or an intermittently firing orflooded engine can cause three-way cata-lytic converter or exhaust system over-heating.
Remember that tampering or unauthor-ized modifications to the engine, theEngine Control Module, or the vehicle maybe illegal and can cause three-way cata-lytic converter or exhaust system over-heating. This includes: altering fuel injec- tion settings or components, alteringemission system components or locationor removing components, and/or repeateduse of leaded fuel.
NOTE
Unleaded fuel is required for vehicles with three-way catalytic converters.
Heated oxygen sensorsThe heated oxygen sensors monitor the oxy- gen content of the exhaust gases. Readings are fed into a control module that continuouslymonitors engine functions and controls fuelinjection. The ratio of fuel to air into the engineis continuously adjusted for efficient combus-tion to help reduce harmful emissions.
Related information

Octane rating (p. 437)
Fuel (p. 436)
Overheating of engine and transmission
In certain driving conditions, such as driving in mountainous areas or hot weather, there isa risk of the engine or transmission overheat-ing, especially when carrying heavy loads.
Engine power may be temporarily limited.
Remove any auxiliary lights mounted in front of the grille when driving in hotweather.
If the temperature in the engine's coolingsystem becomes too high, a warning sym-bol 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 orEngine coolant Level low, turn off
engine is displayed, stop the vehicle and
turn off the engine.
If the transmission begins to overheat, an alternative gear shifting program will beselected. An integrated protective functionwill also be activated, the warning symbolwill illuminate and the message
Transmission warm Reduce speed to
lower temperature or Transmission hot
Stop safely, wait for cooling will be dis-

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STARTING AND DRIVING
440played in the instrument panel. Follow the recommendations given by reducingspeed or stopping the vehicle safely andletting the engine idle for a few minutes tolet the transmission cool.
If the vehicle begins to overheat, the airconditioning may be temporarily switchedoff.
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
Symbol Meaning
High engine temperature. Follow the recommendations provided.
Low coolant level. Follow the recommendations provided.
Transmission hot/overheated/ cooling. Follow the recommen-dations provided.
Related information
Refilling coolant (p. 576)
Preparing for a long trip (p. 432)
Battery drain
The electrical functions in the vehicle drain the battery to varying degrees. Avoid usingignition mode II when the engine is switched
off. Use ignition mode I instead, as this uses
less electrical current.
Note that certain accessories may also drain power from the electrical system. Do not usefunctions that use a lot of electrical currentwhen the engine is turned off. Examples ofsuch functions 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'senergy-saving function will then turn off orreduce certain functions, such as the blowerand/or the audio system.
–Charge the battery by starting the engine and let it run for at least 15 minutes (driv-ing charges the battery faster than lettingthe engine idle).
Related information
Start battery (p. 579)
Ignition modes (p. 401)

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MAINTENANCE AND SERVICE
5761.
Open the
Car Status app from App view
in the center display.
2. Tap
Status to display the oil level.
Oil level graphic in the center display.
NOTE
The system cannot directly detect changes when the oil is filled or drained. The vehiclemust have been driven approximately30 km (20 miles) and have been stationary5 minutes on a level surface and with theengine off before the correct oil level willbe displayed.
NOTE
If the conditions for measuring oil level are not properly fulfilled (time after engineshutdown, vehicle inclination, ambient temperature, etc.) the message
No value
available will be shown in the center dis-
play. This does not mean that anything is
wrong in the vehicle systems.
Related information
Engine oil (p. 574)
Engine oil specifications (p. 631)
Ignition modes (p. 401)
Vehicle status (p. 567)
Refilling coolant
Coolant helps keep the combustion engine at the right operating temperature. The heattransferred from the engine to the coolantcan be used to warm the passenger compart-ment.
When refilling coolant, follow the instructions on the package. Never fill the cooling systemwith only water. The risk of freezing isincreased with too low or too high amounts ofcoolant. If there is coolant under the vehicle, smoke from the cooling system, or if more than2 liters (about 2 quarts) of coolant has beenadded to the system, there could be some-thing wrong with the cooling system and star-ting the vehicle could damage the engine. Calla tow truck and do not attempt to start theengine.
WARNING
The coolant may be very hot. Never unscrew the cap when the coolant is hot. Ifcoolant must be filled, unscrew the expan-sion tank cap slowly to relieve overpres-sure.

MAINTENANCE AND SERVICE
577
Coolant expansion tank, left-hand drive vehicle.
Unscrew the cover in the plastic covering.
Unscrew the expansion tank cap and fill coolant as needed. The level should notexceed the yellow MAX mark inside the
expansion tank.
Put the components back in place in thereverse order.
CAUTION
Do not ingest the contents. May cause damage to organs (kidneys).
Use premixed coolant according toVolvo's recommendations. If concen-trated coolant is used, make sure thatthe coolant mixture is 50% coolantand 50% water of acceptable quality.
Do not mix different types of coolant.
To help ensure sufficient corrosion pro-tection in the system, only use newcoolant when replacing larger compo-nents in the cooling system.
Never run the engine unless the cool-ing system is properly filled. Animproperly filled cooling system couldlead to high temperatures and cracksin the cylinder heads.
High levels of chlorine, chlorides andother salts may cause corrosion in thecooling system.
Related information
Engine compartment overview (p. 573)
Coolant specifications (p. 632)

INDEX
639
Driver profile 133
edit 134, 135, 137
select 134
Driver support system 268 Drive mode 301
Drive systems 418 Driving cooling system 439
Driving economy 428
Driving through standing water 433
E
Economical driving 428
Electrical outlet 554 use 554
Electrical system 579 Electric drive motor specifications 630
electric motor 418 Range 429
Electric parking brake 406
Electronic immobilizer 248
emergency brake lights 158
Emission inspection readiness 562
Energy distribution using map data 424
Engine automatic start and stop of combus-
tion engine 419
overheating 439
start 398
turn off 400
Engine braking 403, 413 Engine compartment coolant 576
engine oil 574
overview 573
Engine drag control 269
Engine oil 574 filling 575
filter 574
grade and volume 631
Engine shutdown 400
Engine specifications 630Engine temperature high 439
Environment 28 Ethanol content max. 10% by volume 436
Exterior dimensions 627
Extra heater (Auxiliary heater) 231F
Federal Clean Air Act 562
Ferry transport 425
Flooded road 433
Fluids, volumes 621, 633
Fluids and oils 632, 633Fog lights rear 157
Four-C 425Front seat blower 219
climate 209
heating 211
temperature 221
ventilation 213
Front seat manual 184
Front seats, power 185 adjusting passenger seat from driv-
er's seat 193
adjusting seat 185
Lumbar support 191
massage 188, 189, 190
multifunction control 188, 189, 190, 191
Side bolsters 191
store position 186, 187
Fuel 436 Travel Link service 471