2018 VOLVO XC90 TWIN ENGINE run flat

WHEELS AND TIRES
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Tread wear indicator
The tread wear indicator shows the status of the
tire's tread. The tread wear indicator is a narrow elevated
strip running across the tire's longitudinal tread
grooves. The letters TWI (Tread Wear Indicator)
are visible on the side of the tire. When approxi-
mately 1.6 mm (1/16 inch) is left on the tread,
the tread will be at the same height as the tread
wear indicator. Replace the tire as soon as possi-
ble. Tires with low tread offer very poor traction in
rain or snow.
Related information
•
Tires (p. 550) Tire terminology
The following is a glossary of tire-related terms.
The tire suppliers may have additional markings,
notes or warnings such as standard load, radial
tubeless, etc.
• Tire information placard: A placard show-
ing the OE (Original Equipment) tire sizes,
recommended inflation pressure, and the
maximum weight the vehicle can carry.
• Tire Identification Number (TIN): A number
on the sidewall of each tire providing infor-
mation about the tire brand and manufactur-
ing plant, tire size and date of manufacture.
• Inflation pressure: A measure of the
amount of air in a tire.
• Standard load: A class of P-metric or Metric
tires designed to carry a maximum load at 35
psi [37 psi (2.5 bar) for Metric tires]. Increas-
ing the inflation pressure beyond this pres-
sure will not increase the tires load carrying
capability.
• Extra load: A class of P-metric or Metric
tires designed to carry a heavier maximum
load at 41 psi [43 psi (2.9 bar) for Metric
tires]. Increasing the inflation pressure
beyond this pressure will not increase the
tire's load carrying capability.
• kPa: Kilopascal, a metric unit of air pressure.
• PSI: Pounds per square inch, a standard unit
of air pressure. •
B-pillar: The structural member at the side
of the vehicle behind the front door.
• Bead area of the tire: Area of the tire next
to the rim.
• Sidewall of the tire: Area between the bead
area and the tread.
• Tread area of the tire: Area of the perime-
ter of the tire that contacts the road when
mounted on the vehicle.
• Rim: The metal support (wheel) for a tire or a
tire and tube assembly upon which the tire
beads are seated.
• Maximum load rating: a figure indicating
the maximum load in pounds and kilograms
that can be carried by the tire. This rating is
established by the tire manufacturer.
• Maximum permissible inflation pressure:
the greatest amount of air pressure that
should ever be put in the tire. This limit is set
by the tire manufacturer.
• Recommended tire inflation pressure:
inflation pressure, established by Volvo,
which is based on the type of tires that are
mounted on a vehicle at the factory. This
information can be found on the tire inflation
placard(s) located on the driver's side B-pillar
and in the tire inflation table in this chapter.
• Cold tires: The tires are considered to be
cold when they have the same temperature
as the surrounding (ambient) air. This tem-

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554
perature is normally reached after the vehicle
has been parked for at least 3 hours.
Related information
•
Tires (p. 550) Tire sidewall designations
The following information can be found on a
tire's sidewall. Federal law mandates that tire manufacturers
place standardized information on the sidewall of
all tires (see the illustration).
The vehicle has been certified with certain combi-
nations of wheels and tires.
The following information is listed on the tire
sidewall:
The tire designation:
NOTE Please be aware that the following tire desig-
nation is an example only and that this par-
ticular tire may not be available on your vehi-
cle.
1.
215: the width of the tire (in millimeters)
from sidewall edge to sidewall edge. The
larger the number, the wider the tire.
2. 65: The ratio of the tire's height to its width
in percent.
3. R: Radial tire (the designation RF and the symbol indicate that the vehicle is
equipped with optional self-supporting run
flat tires 3
.
4. 15: The diameter of the wheel rim (in
inches).
5. 95: The tire's load index. In this example, a
load index of 95 equals a maximum load of
1521 lbs (690 kg).
6. H: The tire's speed rating, or the maximum
speed at which the tire is designed to be
driven for extended periods of time, carrying
a permissible load for the vehicle, and with
correct inflation pressure. For example, H
indicates a speed rating of 210 km/h
(130 mph). 3
Self-supporting run flat tires may not be available on all models.

WHEELS AND TIRES
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* Option/accessory. 561
Calibrating the tire pressure
monitoring system*
In order for the tire pressure monitoring system,
Tyre Pressure Monitoring System (TPMS), to
function correctly, tire pressure reference values
must be set correctly. This must be done each
time the tires are changed or the tire pressure is
adjusted.
For example, when driving with a heavy load or at
high speeds (over 160 km/h (100 mph)), tire
pressure should be adjusted to the Volvo-recom-
mended tire pressure values. The system should
then be recalibrated.
1.

Switch off the ignition.
2. Inflate the tires to the pressure indicated on the tire pressure placard on the driver's side
B pillar.
3. Start the vehicle.
4. Open the Car status app in App view. 5.
Tap TPMS.NOTE The car must be stationary when calibration is
started.
6.
Tap Calibrate.
7. Tap OK to confirm that the tire pressure in
all four tires has been checked and adjusted. 8.

Run the car until calibration is complete.
Calibration is done when the vehicle is driv-
ing at a speed above 35 km/h (22 mph).
> When enough data has been collected for the system to detect low tire pressure, the
color of the tire symbols in the center dis-
play will change from gray to green. The
system will not provide any other confir-
mation that calibration has been comple-
ted.
If the car's ignition is switched off before
calibration is complete, the tires in the
center display change color from gray to
green upon next start-up, even if calibra-
tion is not complete. Perform the calibra-
tion again and allow it to complete within
the same operating cycle to ensure that
the calibration is carried out correctly.
If start-up of calibration fails, the following
message appears: Calibration
unsuccessful. Try again..

||WHEELS AND TIRES
* Option/accessory.
562
NOTE Always remember to calibrate the Tire Pres-
sure Monitoring System when the wheels
have been changed or the tire inflation pres-
sure has been corrected according to the tire
pressure decal or tire inflation pressure table.
If correct reference values have not been set,
the system cannot issue low tire pressure
alerts correctly.
The vehicle must be stationary with the
engine running to access the calibration but-
ton and to start the calibration process.
WARNING
The exhaust gases contain carbon monoxide,
which is invisible and odorless but very poi-
sonous. For this reason, always perform the
calibration procedure outdoors or in a work-
shop with exhaust gas evacuation equipment.
Related information
•
Recommended tire pressure (p. 559)
• Adjusting tire pressure (p. 558)
• Viewing tire pressure status in the center
display* (p. 562)
• Action when warned of low tire pressure
(p. 563)
• Tire pressure monitoring system* (p. 559) Viewing tire pressure status in the
center display*
With the system for tire pressure monitoring,
Tyre Pressure Monitoring System (TPMS), tire
pressure status can be viewed in the center dis-
play.
Checking status1. Open the Car status app in App view. 2.
Tap TPMS to display the status of the tires.
Status indicator light
The graphic in the center display shows the sta-
tus of each tire 8
. Green tire:
• Inflation pressure is above the warning
threshold.
Yellow tire:
• The tire's inflation pressure is too low. Stop
and check/inflate the tire as soon as possi-
ble. Recalibrate the system after adjusting
the tire pressure.
All tires yellow:
• The inflation pressure is too low in one or
more tires. Stop and check/inflate the tires
as soon as possible. Recalibrate the system
after adjusting tire pressure.
All tires gray:
• Calibration in progress.
• Status unknown. 8
The illustration is generic. Layout may vary depending on vehicle model \
or software version.

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* Option/accessory.
570
WARNING •
The vehicle must never be driven with
more than one "Temporary spare" tire
mounted.
• Driving with a spare wheel may alter the
driving characteristics of the vehicle.
Replace the spare wheel with a normal
wheel as soon as possible.
• The spare wheel is smaller than the nor-
mal wheel, which affects the vehicle's
ground clearance. Watch for high curbs
and do not wash the vehicle in an auto-
matic car wash when a spare wheel is
mounted.
• Follow the manufacturer's recommended
tire inflation pressure for the spare wheel.
• On all-wheel drive vehicles, the drive on
the rear axle can be disconnected.
• If the spare wheel is mounted on the
front axle, snow chains must not be used.
• The spare wheel must not be repaired.
CAUTION The vehicle must not be driven with wheels of
different dimensions or with a spare tire other
than the one that came with the vehicle. The
use of different size wheels can seriously
damage your vehicle's transmission.
Related information
•
When changing wheels (p. 564)
• Recommended tire pressure (p. 559) Accessing the spare wheel
Follow these instructions regarding handling the
spare wheel. The spare wheel is stored in a bag and should be
secured with two straps onto the floor of the
trunk/cargo compartment when the vehicle is
being driven
12
. The straps should be strapped
down crosswise over the wheel, attached to the
load anchoring eyelets and pulled taut.
Wheel changing tools are located under the
cargo compartment floor.
Related information
• Spare wheel (p. 569)

WHEELS AND TIRES
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575
7.

Connect the electrical cable to the nearest
12 V outlet and start the vehicle.
NOTE Make sure that none of the vehicle's other
12 V sockets are used while the compressor
is running.
WARNING
Never leave children unattended in the vehicle
while the engine is running.
8.

Start the compressor by moving the switch to
the I (On) position.
WARNING Never stand next to a tire being inflated with
the compressor. If cracks, bulges, etc. form on
the tire, switch off the compressor immedi-
ately. The vehicle should not be driven. Call
roadside assistance to have the vehicle towed
to a workshop for inspection/replacement of
the tire. Volvo recommends an authorized
workshop.
NOTE
When the compressor first starts, air pressure
may 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 compressor
should never be used for more than
10 minutes at a time. 10. Switch off the compressor and check the
inflation pressure using the air pressure
gauge. The inflation pressure should be
between 1.8 bar (22 psi) and 3.5 bar
(51 psi). If the inflation pressure is too high,
use the air release valve to release air.
WARNING If the bottle is not removed in the correct
order, sealant could spill out.
WARNING
If pressure falls below 1.8 bar (22 psi), the
hole in the tire may be too large. The vehicle
should not be driven. Call roadside assistance
to have the vehicle towed to a workshop for
inspection/replacement of the tire. Volvo rec-
ommends an authorized workshop.
11.

Switch off the compressor and remove the
electrical cable.
12. Unscrew the hose from the tire's valve and screw the valve cap back on.
13. Put the protective hose cover onto the hose to help prevent leakage of any residual seal-
ing compound. Return the equipment to the
cargo compartment.

WHEELS AND TIRES
577
Inflate tires with the compressor
included in the tire sealing system
The vehicle's original tires can be inflated using
the compressor in the tire sealing system.
1. The compressor must be switched off. Make
sure that the switch is in the 0 (Off) position
and take out the electrical cable and the
hose.
2.

Unscrew the tire's valve cap and screw the
hose's valve connector as far as possible
onto the valve.
Be sure the air release valve on the com-
pressor's hose is completely closed.
3. Connect the electrical cable to the nearest 12 V outlet and start the vehicle.
WARNING Inhaling exhaust fumes could lead to serious
injury. Never leave the engine running in an
enclosed space or a space without sufficient
ventilation.
WARNING
Never leave children unattended in the vehicle
while the engine is running.
4.

Start the compressor by moving the switch to
the I (On) position.
CAUTION Risk of overheating. The compressor should
not be running for longer than 10 minutes at
a time.
5. Inflate the tire to the pressure specified on
the tire pressure decal on the driver's side
door pillar. If the inflation pressure is too
high, use the air release valve to release air.
6.

Switch off the compressor. Remove the hose
and the electrical cable.
7. Screw the valve cap back onto the tire.
NOTE •
After inflating a tire, always replace the
valve cap to help prevent valve damage
caused by gravel, dirt, etc.
• Use plastic valve caps only. Metal caps
could corrode and become difficult to
remove.
NOTE The compressor is an electric device. Follow
local regulations for disposal.
Related information
•
Recommended tire pressure (p. 559)
• Using the tire sealing system (p. 573)
• Tire sealing system (p. 572)

INDEX
673
Inflation pressure table 665
Information display 84, 86
Infotainment (Audio and media) 486
Instrument cluster 84
settings 86
Instrument illumination 164
Instrument lighting 164
Instrument panel App menu 103, 104
hybrid-related symbols and messages 419
messages 105
Instruments and controls 82
Instruments overview left-hand drive vehicle 82
Integrated booster cushion 76 folding down 78
folding up 77
IntelliSafe driver support 28
Interior Air Quality System 206
Intermittent wiping 176
Internet, see Internet-connected vehicle 529
Internet-connected vehicle 529 book service and repair 603
No connection or poor connection 534
send car data 604
system updates 601 iPod®
, connecting
514
ISOFIX/LATCH anchors 74
J Jack
565
Jump-start
469
K Key
239
Keyboard
126, 129
change language 129
Keyless locking/unlocking 254
settings 256
touch-sensitive surfaces 253
Key tag 239
L Labels
location of
654
Laminated glass 166 Lamps
changing
613
specifications 614
Trailer 475
Lane Keeping Aid operation 367
Lane Keeping Aid (LKA) 364, 366, 367, 369, 371
Language 132
Leather upholstery, cleaning instructions 636
Leveling control 450 settings 453
License agreement 98, 539
Lifting tools 565
Light bulbs, specifications 614
Light control 152, 164
Lighting Active Bending Lights 159
approach lighting 161
automatic high beam 157
automatic lighting controls, passenger
compartment 162
brake lights 160
controls 152, 162, 164
daytime running lights 154
display lighting 164
emergency brake lights 160
Hazard warning flashers 161