2019 VOLVO S90 TWIN ENGINE engine overheat

STARTING AND DRIVING
444
The kickdown function
Kickdown is used when maximum acceleration isneeded, e.g. when passing.
When the accelerator pedal is depressed all theway to the floor (past the normal full acceleratorposition), the transmission will automaticallyengage kickdown, i.e. immediately shift down to alower gear.
If the accelerator pedal is released from the kick-down position, the transmission will automaticallyshift up again.

Safety function
The transmission control module is equipped witha downshift protection feature to help prevent theengine from overheating.
In some conditions, the transmission will preventdownshifting/kickdown if this would lead to suchhigh engine speed (rpm) that the engine couldbe damaged. If the driver still attempts downshift-ing or kickdown at a high rpm, nothing will hap-pen and the original gear will remain selected.
With kickdown, the vehicle can downshift one ormore steps at a time depending on the enginespeed. The vehicle upshifts when the engine rea-ches its maximum rpm to prevent engine dam-age.

Related information
Gear selector positions for automatic trans-missions (p. 440)
All Wheel Drive (AWD)
All-wheel drive, All Wheel Drive (AWD), alsocalled four-wheel drive, means that power is dis-tributed to all four wheels, which improves trac-tion.
The electric motor that powers the rear wheelsenables electronic all-wheel drive functionality.All-wheel drive reacts differently depending onwhich drive mode is selected.
Related information
Drive modes (p. 446)
Transmission (p. 440)
Drive systems
Volvo Twin Engine combines a combustionengine for the front wheels and an electric motorfor the rear wheels.
Two drive systems
Depending on the selected drive mode andpower available in the electric motor, the drivesystems can either be used separately or in tan-dem.
The electric motor gets its energy from a hybridbattery located under the tunnel console. Thehybrid can be charged from a wall outlet or in aspecial charging station. The combustion enginecan also charge the hybrid battery using a specialhigh-voltage generator.
Both the combustion engine and the electricmotor can generate power directly to the wheels.An advanced control system coordinates both thedrive systems to help optimize driving economy.

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STARTING AND DRIVING
464

WARNING
Carbon monoxide is a poisonous, colorless,and odorless gas. It is present in all exhaustgases. If you ever smell exhaust fumes insidethe vehicle, make sure the passenger com-partment is ventilated, and immediately returnthe vehicle to a trained and qualified Volvoservice technician for correction.

Demanding driving
In demanding driving conditions, such as whentowing a trailer or driving in hot weather or forprolonged periods at high altitudes, it may be a
good idea to switch to a higher-octane fuel (AKI5
91 or higher) or to switch to another brand ofgasoline in order to fully utilize the vehicle'sengine capacity and optimize traction.

Related information
Fuel (p. 461)
Emission controls (p. 464)
Emission controls
Three-way catalytic converter
Keep your engine properly tuned. Certainengine malfunctions, particularly involving theelectrical, fuel or distributor ignition systems,may cause unusually high three-way catalyticconverter temperatures. Do not continue tooperate your vehicle if you detect enginemisfire, noticeable loss of power or otherunusual operating conditions, such as engineoverheating or backfiring. A properly tunedengine will help avoid malfunctions thatcould damage the three-way catalytic con-verter.
Do not park your vehicle over combustiblematerials, such as grass or leaves, which cancome into contact with the hot exhaust sys-tem and cause such materials to ignite undercertain wind and weather conditions.
Excessive starter cranking (in excess of oneminute), or an intermittently firing or floodedengine can cause three-way catalytic con-verter or exhaust system overheating.
Remember that tampering or unauthorizedmodifications to the engine, the Engine Con-trol Module, or the vehicle may be illegal andcan cause three-way catalytic converter orexhaust system overheating. This includes:altering fuel injection settings or compo-nents, altering emission system components
or location or removing components, and/orrepeated use of leaded fuel.

NOTE
Unleaded fuel is required for vehicles withthree-way catalytic converters.

Heated oxygen sensors
The heated oxygen sensors monitor the oxygencontent of the exhaust gases. Readings are fedinto a control module that continuously monitorsengine functions and controls fuel injection. Theratio of fuel to air into the engine is continuouslyadjusted for efficient combustion to help reduceharmful emissions.

Related information
Octane rating (p. 462)
Fuel (p. 461)
5AKI (Anti Knock Index) is an average value of RON (Research Octane Number) and MON (Motor Octane Number) - (RON)+(MON)/2

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)

WHEELS AND TIRES
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567
3.Make sure the switch is in the 0 (Off) posi-tion and take out the electric cable and thehose.
4.Unscrew the orange cover on the compres-sor and unscrew the cap on the sealing com-pound bottle.
5.Screw the bottle onto the bottle holder as faras possible.
The bottle and the bottle holder are equip-ped with catches to help prevent the sealingcompound from leaking. Once the bottle isscrewed into place into the bottle holder, itcannot be unscrewed. The bottle can only beremoved by a workshop. Volvo recommendsan authorized Volvo workshop.

WARNING
Do not unscrew the bottle. It is equipped witha catch to prevent leakage.
6. Unscrew the tire's valve cap and screw thehose's valve connector as far as possibleonto the valve.
Be sure the air release valve on the com-pressor's hose is completely closed.
7.Connect the electrical cable to the nearest12 V outlet and start the vehicle.
NOTE
Make sure that none of the vehicle's other12 V sockets are used while the compressoris running.

WARNING
Never leave children unattended in the vehiclewhile the engine is running.

WARNING
Inhaling exhaust fumes could lead to seriousinjury. Never leave the engine running in anenclosed space or a space without sufficientventilation.
8. Start the compressor by moving the switch tothe I (On) position.
WARNING
Never stand next to a tire being inflated withthe compressor. If cracks, bulges, etc. form onthe tire, switch off the compressor immedi-ately. The vehicle should not be driven. Callroadside assistance to have the vehicle towedto a workshop for inspection/replacement ofthe tire. Volvo recommends an authorizedworkshop.

NOTE
When the compressor first starts, air pressuremay temporarily increase up to 6 bar (88 psi)but should decrease again after approxi-mately 30 seconds.
9. Inflate the tire for 7 minutes.

CAUTION
To help avoid overheating, the compressorshould never be used for more than10 minutes at a time.

WHEELS AND TIRES
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569
The sealing compound bottle must be replacedafter use. Volvo recommends contacting anauthorized Volvo workshop for replacement.

WARNING
After using the tire sealing system, the vehicleshould not be driven farther than approxi-mately 200 km (120 miles).

NOTE
The compressor is an electric device. Followlocal regulations for disposal.

Related information
Recommended tire pressure (p. 551)
Tire sealing system (p. 564)
Inflate tires with the compressor included inthe tire sealing system (p. 569)
Inflate tires with the compressorincluded in the tire sealing system
The vehicle's original tires can be inflated usingthe compressor in the tire sealing system.
1. The compressor must be switched off. Makesure that the switch is in the 0 (Off) positionand take out the electrical cable and thehose.
2. Unscrew the tire's valve cap and screw thehose's valve connector as far as possibleonto the valve.
Be sure the air release valve on the com-pressor's hose is completely closed.
3.Connect the electrical cable to the nearest12 V outlet and start the vehicle.

WARNING
Inhaling exhaust fumes could lead to seriousinjury. Never leave the engine running in anenclosed space or a space without sufficientventilation.

WARNING
Never leave children unattended in the vehiclewhile the engine is running.
4. Start the compressor by moving the switch tothe I (On) position.
CAUTION
Risk of overheating. The compressor shouldnot be running for longer than 10 minutes ata time.
5. Inflate the tire to the pressure specified onthe tire pressure decal on the driver's sidedoor pillar. If the inflation pressure is toohigh, use the air release valve to release air.
6. Switch off the compressor. Remove the hoseand the electrical cable.
7.Screw the valve cap back onto the tire.

NOTE
After inflating a tire, always replace thevalve cap to help prevent valve damagecaused by gravel, dirt, etc.
Use plastic valve caps only. Metal capscould corrode and become difficult toremove.

NOTE
The compressor is an electric device. Followlocal regulations for disposal.

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

INDEX
658
low beams 151
position lights 150
rear fog light 155
settings 149
Turn signals 154
Lighting, replacing bulbs 600
Limp home 440
Load anchoring eyelets
cargo compartment 582
Load anchoring hooks 581
Load carriers 581
Load index 546
Loading
general 580
load anchoring eyelets 582
long load 580
Lock indication 236
setting 237
Locking/unlocking
trunk lid 241, 255
Locking wheel bolts 557
Locks
Locking 240
unlocking 240
Long-term storage 424
Low battery charge level
start battery 466
Low beams151
Low oil level598
M
Maintained climate comfort229
start/stop229
Maintenance584
corrosion protection630
Max. axle weight643
Max. roof load643
Media player500, 502
compatible file formats507, 508
voice control144
Messages and symbols
Adaptive Cruise Control306
Collision warner with auto-brake345
Messages in BLIS351
Messages in display101, 136
handling102, 136
saved103, 137
Mileage85
electric motor455
Misting
condensation in headlights 624, 627
Mood lighting159
O
Occupant safety43
Occupant weight sensor56
Octane rating462
Oil, see also Engine oil646
On-board diagnostics584
On-board Diagnostic socket37
Option/accessory21
Outside temperature gauge90
Overheating465
Owner's information16
OWNER'S MANUAL21
in cellular phone20
in the center display17, 18
P
Paddle at steering wheel193
Paint
color code632
paint damage and touch-up631, 632
Panoramic roof
opening and closing171
pinch protection162