Volvo XC90 T8 Twin Engine Plug-in Hybrid (2017 year). Instruction

WHEELS AND TIRES

483

Tire direction of rotation

Incorrectly mounted tires impair the car's braking
properties and ability to force aside rain, snow
and slush.

The arrows shows the direction of rotation of the tire

•

The tires with the most tread should always
be on the rear axle (to help reduce the risk of
skidding).

•

When switching between summer and winter
tires, mark the tires to indicate where they
were mounted on the car, e.g., LF = left front,
RR = right rear

•

Tires with tread designed to roll in only one
direction are marked with an arrow on the
sidewall.

•

Contact a trained and qualified Volvo service
technician if you are unsure about the tread
depth.

Related information

•

Tires (p. 478)

Tread wear indicator

The tires have wear indicator strips running
across or parallel to the tread.

The letters TWI are printed on the side of the tire.
When approximately 1/16" (1.6 mm) is left on
the tread, these strips become visible and indi-
cate that the tire should be replaced. Tires with
less than 1/16" (1.6 mm) tread offer very poor
traction.

When replacing worn tires, it is recommended
that the tire be identical in type (radial) and size
as the one being replaced. Using a tire of the
same make (manufacturer) will help prevent
alteration of the driving characteristics of the
vehicle.

Related information

•

Tire direction of rotation (p. 483)

•

Checking tire inflation pressure (p. 486)

WHEELS AND TIRES

484

Loading specifications

Properly loading your vehicle will provide maxi-
mum return of vehicle design performance.

Weight designations

Before loading your vehicle, familiarize yourself
with the following terms for determining your
vehicle's weight ratings, with or without a trailer,
from the vehicle's Federal/Canadian Motor Vehi-
cle Safety Standards (FMVSS/CMVSS) label, and
the vehicle's tire information placard:

Curb weight

The weight of the vehicle including a full tank of
fuel and all standard equipment. It does not
include passengers, cargo, or optional equipment.

Capacity weight

All weight added to the curb weight, including
cargo and optional equipment. When towing,
trailer hitch tongue load is also part of cargo
weight.

Permissible axle weight

The maximum allowable weight that can be car-
ried by a single axle (front or rear). These num-
bers are shown on the Federal/Canadian Motor
Vehicle Safety Standards (FMVSS/CMVSS) label.
The total load on each axle must never exceed its
maximum permissible weight.

Gross vehicle weight (GVW)

The vehicle's curb weight + cargo + passengers.

Steps for Determining Correct Load
Limit

1. Locate the statement "the combined weight

of occupants and cargo should never exceed
XXX kg or XXX lbs." on your vehicle's plac-
ard.

2. Determine the combined weight of the driver

and passengers that will be riding in your
vehicle.

3. Subtract the combined weight of the driver

and passengers from XXX kg or XXX lbs.

4. The resulting figure equals the available

amount of cargo and luggage load capacity.
For example, if the "XXX" amount equals
1400 lbs. and there will be five 150 lb. pas-
sengers in your vehicle, the amount of availa-
ble cargo and luggage load capacity is
650 lbs. (1400 – 750 (5 × 150) = 650 lbs.)

5. Determine the combined weight of luggage

and cargo being loaded on the vehicle. That
weight may not safely exceed the available
cargo and luggage load capacity calculated
in Step 4.

6. If your vehicle will be towing a trailer, load

from your trailer will be transferred to your
vehicle. Consult this manual to determine
how this reduces the available cargo and lug-
gage load capacity of your vehicle.

WARNING

•

Exceeding the permissible axle weight,
gross vehicle weight, or any other weight
rating limits can cause tire overheating
resulting in permanent deformation or
catastrophic failure.

•

Do not use replacement tires with lower
load carrying capacities than the tires that
were original equipment on the vehicle
because this will lower the vehicle's GVW
rating. Use only tires with the correct load
carrying capacity. Consult your Volvo
retailer for information.

Related information

•

Label information (p. 558)

•

Weights (p. 563)

WHEELS AND TIRES

}}

485

Uniform Tire Quality Grading

ALL PASSENGER VEHICLE TIRES MUST
CONFORM TO FEDERAL SAFETY REQUIRE-
MENTS IN ADDITION TO THESE GRADES.

Quality grades can be found, where applica-
ble, on the tire sidewall between the tread
shoulder and maximum section width. For
example:

Treadwear 200 Traction AA Temperature A

TREADWEAR

The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course. For example, a tire graded
150 would wear one and one half (1 ½) times as
well on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, however,
and many depart significantly from the norm due
to variation in driving habits, maintenance practi-
ces and differences in road characteristics and
climate.

TRACTION

The traction grades, from highest to lowest, are
AA, A, B, and C, as measured under controlled
conditions on specified government test surfaces
of asphalt and concrete. A tire marked C may
have poor traction performance. The traction
grade assigned to this tire is based on braking

(straight-ahead) traction tests and is not a meas-
ure of cornering (turning) traction.

WARNING

The traction grade assigned to this tire is
based on braking (straight-ahead) traction
tests and is not a measure of cornering (turn-
ing) traction.

TEMPERATURE

The temperature grades are A (the highest), B,
and C, representing the tire's resistance to the
generation of heat and its ability to dissipate heat
when tested under controlled conditions on a
specified indoor laboratory test wheel. Sustained
high temperature can cause the material of the
tire to degenerate and reduce tire life, and exces-
sive temperature can lead to sudden tire failure.
The grade C corresponds to a minimum level of
performance that all passenger vehicle tires must
meet under the Federal Motor Safety Standard
No. 109. Grades B and A represent higher levels
of performance on the laboratory test wheel than
the minimum required by law.

WARNING

The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, under-infla-
tion, or excessive loading, either separately or
in combination, can cause heat buildup and
tire failure.

Snow tires and chains

The use of snow chains and/or winter tires can
help improve traction in winter driving conditions.

Snow chains can be used on your Volvo with the
following restrictions:

•

Snow chains should be installed on front
wheels only. Use only Volvo approved snow
chains.

•

If accessory, aftermarket or "custom" tires
and wheels are installed and are of a size dif-
ferent than the original tires and wheels,
chains in some cases CANNOT be used.
Sufficient clearances between chains and
brakes, suspension and body components
must be maintained.

•

Some strap-on type chains will interfere with
brake components and therefore CANNOT
be used.

•

All Wheel Drive models: Snow chains
should only be installed on the front wheels.

•

Certain size tires may not allow the assembly
of snow chains/traction devices.

Consult your Volvo retailer for additional snow
chain information.

WHEELS AND TIRES

486

CAUTION

•

Snow chains should not be used on
wheels larger than 19".

•

Always follow the chain manufacturer's
installation instructions carefully. Install
chains as tightly as possible and
retighten periodically.

•

Check local regulations regarding the use
of snow chains before installing.

•

Use single-sided snow chains only.

•

Never exceed the chain manufacturer's
specified maximum speed limit. (Under
no circumstances should you exceed
31 mph (50 km/h).

•

Avoid bumps, holes or sharp turns when
driving with snow chains.

•

The handling of the vehicle can be
adversely affected when driving with
chains. Avoid fast or sharp turns as well
as locked wheel braking.

Checking tire inflation pressure

Correct tire inflation pressure helps improve driv-
ing stability, save fuel and increase the service
life of the tires.

WARNING

•

Under-inflation is the most common
cause of tire failure and may result in
severe tire cracking, tread separation, or
"blow-out," with unexpected loss of vehi-
cle control and increased risk of injury.

•

Under-inflated tires reduce the load car-
rying capacity of your vehicle.

Cold tires

Inflation pressure should be checked when the
tires are cold.

The tires are considered to be cold when
they have the same temperature as the sur-
rounding (ambient) air.

This temperature is normally reached after the
vehicle has been parked for at least 3 hours.

After driving a distance of approximately 1 mile
(1.6 km), the tires are considered to be hot. If you
have to drive farther than this distance to pump
your tire(s), check and record the tire pressure
first and add the appropriate air pressure when
you get to the pump.

When weather temperature changes occur, tire
inflation pressures also change. A 10-degree

temperature drop causes a corresponding drop
of 1 psi (7 kPa) in inflation pressure. Check your
tire pressures frequently and adjust them to the
proper pressure, which can be found on the vehi-
cle's tire information placard or certification label.

If checking tire pressure when the tire is hot,
never "bleed" or reduce air pressure. The tires
are hot from driving and it is normal for pressures
to increase above recommended cold pressures.
A hot tire at or below recommended cold inflation
pressure could be significantly under-inflated.

Recommended inflation pressures

Tire inflation placard

A tire inflation pressure placard is located on the
driver's side B-pillar (the structural member at the
side of the vehicle, at the rear of the driver's door
opening). This placard indicates the designation

WHEELS AND TIRES

487

of the factory-mounted tires on your vehicle, as
well as load limits and inflation pressure.

NOTE

•

The placard shown indicates inflation
pressure for the tires installed on the
vehicle at the factory only.

•

A certain amount of air seepage from the
tires occurs naturally and tire pressure
fluctuates with seasonal changes in tem-
perature. Always check tire pressure reg-
ularly.

•

Use a tire gauge to check the tire inflation
pressure, including the spare

, at least once

a month and before long trips. You are
strongly urged to buy a reliable tire pressure
gauge, as automatic service station gauges
may be inaccurate.

•

Use the recommended cold inflation pres-
sure for optimum tire performance and wear.

•

Under-inflation or over-inflation may cause
uneven treadwear patterns.

Checking tire pressure

1. Remove the cap from the valve on one tire,

then firmly press the tire gauge onto the
valve.

2. Add air to reach the recommended air pres-

sure.

3. Replace the valve cap.

CAUTION

•

After inflating the tires, always reinstall the
valve cap to help avoid damage to the
valve from dirt, gravel, etc.

•

Use plastic valve caps only. Metal caps
could corrode and become difficult to
remove.

4. Visually inspect the tires to make sure there

are no nails or other objects embedded that
could puncture the tire and cause an air leak.

5. Check the sidewalls to make sure there are

no gouges, cuts, bulges or other irregulari-
ties.

6. Repeat this procedure for each tire, including

the spare.

NOTE

If you overfill the tire, release air by pushing
on the metal stem in the center of the valve.
Then recheck the pressure with your tire
gauge.

Changing tires

When changing wheels to another dimension,
always follow Volvo's instructions.

When changing to tires of another
dimension

If you mount tires with a dimension other than
the factory-installed tires, contact an authorized
Volvo retailer to update the vehicle's software.
This may also be necessary when changing from
summer to winter tires, or vice versa.

Related information

•

Snow tires and chains (p. 485)

•

Installing a wheel (p. 491)

•

Removing a wheel (p. 489)

Not available in all models.

WHEELS AND TIRES

* Option/accessory, for more information, see Introduction.

488

Tools

Tools for e.g., changing wheels, etc. are located
under the cargo compartment floor.

The foam block under the cargo compartment
floor contains the towing eyelet, the tool for
removing plastic wheel bolt covers, the jack

* and

the lug wrench

*. There is also a storage space for

the tool used to remove locking wheel bolts.

Related information

•

Jack (p. 488)

•

Changing tires (p. 487)

Jack

The jack is used to raise the vehicle, for example
when mounting winter wheels, etc.

WARNING

•

The jack must correctly engage the jack
attachment.

•

Be sure the jack is on a firm, level, non-
slippery surface.

•

Never allow any part of your body to be
extended under a vehicle supported by a
jack.

•

Use the jack intended for the vehicle
when changing a tire. For any other job,
use stands to support the vehicle.

•

Apply the parking brake and put the gear
selector in the Park (P) position.

•

Block the wheels standing on the ground,
use rigid wooden blocks or large stones.

•

The jack should be kept well-greased and
clean, and should not be damaged.

•

No objects should be placed between the
base of jack and the ground, or between
the jack and the attachment bar on the
vehicle.

CAUTION

•

When not in use, the jack

* should be kept

in its storage compartment under the
cargo compartment floor.

•

The jack provided with your vehicle is
intended to be used only in temporary sit-
uations such as changing wheels in the
event of a flat tire. Only the jack that
came with your particular model should
be used to lift the vehicle. If the vehicle
needs to be lifted more frequently or for a
prolonged period, using a garage jack or
hoist is recommended. Always follow this
device’s instructions for use.

Models with leveling control

If the vehicle is equipped with the optional pneu-
matic suspension, this feature must be turned off
before raising the vehicle with the jack.

To do so, go to

Settings

Vehicle

Deactivate Suspension & Leveling Control

the center display's Top view.

WHEELS AND TIRES

}}

* Option/accessory, for more information, see Introduction.

489

Wheel bolts

The wheel bolts hold the wheel in place.

CAUTION

Wheel bolts should be tightened to 103 ft.
lbs. (140 Nm). Over-tightening could damage
the threads.

Only use wheels/rims that have been tested and
approved by Volvo and are included in Volvo's
product range.

Use a torque wrench to check that the wheel
bolts are tightened correctly.

Never lubricate the wheel bolts' threads.

Locking wheel bolts

A tool for removing locking wheel bolts can be
found in the foam block under the cargo com-
partment floor.

Related information

•

Changing tires (p. 487)

•

Installing a wheel (p. 491)

Removing a wheel

Wheel changes should always be carried out
correctly.

1. Turn on the hazard warning flashers if the

wheel change has to be done near passing
traffic.

2. Apply the parking brake and put the gear

selector in P.

CAUTION

Models with suspension and level con-
trol

Turn this function off before raising the vehi-
cle.

To do so, go to

Settings

Vehicle

Deactivate Suspension & Leveling Control

in the center display's Top view.

WARNING

•

The jack must correctly engage the jack
attachment.

•

Be sure the jack is on a firm, level, non-
slippery surface.

•

Never allow any part of your body to be
extended under a vehicle supported by a
jack.

•

Use the jack intended for the vehicle when
changing a tire. For any other job, use
stands to support the vehicle.

•

Apply the parking brake and put the gear
selector in the Park (P) position.

•

Block the wheels standing on the ground,
use rigid wooden blocks or large stones.

•

The jack should be kept well-greased and
clean, and should not be damaged.

•

No objects should be placed between the
base of jack and the ground, or between
the jack and the attachment bar on the
vehicle.

WHEELS AND TIRES

490

NOTE

The jack provided with your vehicle is
intended to be used only in temporary situa-
tions such as changing wheels in the event of
a flat tire. Only the jack that came with your
particular model should be used to lift the
vehicle. If the vehicle needs to be lifted more
frequently or for a prolonged period, using a
garage jack or hoist is recommended. Always
follow this device’s instructions for use.

Tool for removing the plastic covers on the wheel bolts

Remove the plastic covers on the wheel bolts.

4. Block the wheels that are on the ground with

wooden blocks or large stones.

Lug wrench and towing eyelet

Screw the towing eyelet into the lug wrench
as shown in the illustration.

CAUTION

The towing eyelet must be screwed into the
lug wrench as far as possible.

6. With the vehicle still on the ground, use the

lug wrench/towing eyelet to loosen the
wheel bolts ½ – 1 turn by exerting downward
(counterclockwise) pressure.

7. When hoisting the vehicle, it is essential that

the jack (or garage lift arms) are positioned
correctly on the underside of the vehicle.
There are two jack attachment points on
each side of the vehicle and there is a groove
in the plastic cover at each attachment point.
Position the jack under the attachment point
to be used on a level, firm, non-slippery sur-
face and crank it up until it is correctly
aligned and seated in the attachment point.
The pin on the jack's head must be posi-
tioned in the hole in the attachment point.

8. Raise the vehicle until the wheel to be

changed is lifted off the ground. Remove the
wheel bolts.

Related information

•

Wheel bolts (p. 489)

•

Installing a wheel (p. 491)

•

Jack (p. 488)

WHEELS AND TIRES

}}

491

Installing a wheel

It is important to install wheels properly.

1. Clean the contact surfaces on the wheel and

hub.

2. Lift the wheel and place it on the hub.

3. Install the wheel bolts and tighten hand-tight.

Using the lug wrench, tighten crosswise until
all bolts are snug.

4. Lower the vehicle to the ground and alter-

nately tighten the bolts crosswise to
103 ft. lbs. (140 Nm).

5. Press the plastic covers onto the wheel bolts.

CAUTION

•

After inflating the tires, always reinstall
the valve cap to help avoid damage to the
valve from dirt, gravel, etc.

•

Use plastic valve caps only. Metal caps
could corrode and become difficult to
remove.

Related information

•

Wheel bolts (p. 489)

•

Jack (p. 488)

Tire Pressure Monitoring System

(TPMS)

TPMS provides a warning if inflation pressure in
one or more tires is too low. It also uses a sym-
bol (called a telltale) that will flash for
60 seconds and then glow steadily if there is a
system malfunction.

TPMS uses the rotational speed of the tires in
combination with signal analysis of the ABS sen-
sor signals to determine if they are properly infla-
ted. When a tire is under-inflated, its diameter
(and consequently also its rotational speed)
changes. By comparing the individual tires with
each other it is possible to determine if one or
more tires are under inflated. If inflation pressure
is too low, an indicator symbol will illuminate in
the instrument panel and a text message will be
displayed.

Symbol

Explanation

The symbol illuminates to indicate
low tire inflation pressure.

If a malfunction occurs in the sys-
tem, the tire pressure warning sym-
bol will flash for approximately
1 minute and then remain illumi-
nated.

Each tire, including the spare (if provided), should
be checked monthly when cold and inflated to

WHEELS AND TIRES

492

the inflation pressure recommended by the vehi-
cle manufacturer on the vehicle placard or tire
inflation pressure label. (If your vehicle has tires
of a different size than the size indicated on the
vehicle placard or tire inflation pressure label, you
should determine the proper tire inflation pres-
sure for those tires.)

As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pres-
sure telltale when one or more of your tires is
significantly under-inflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible,
and inflate them to the proper pressure.

Driving on a significantly under-inflated tire cau-
ses the tire to overheat and can lead to tire fail-
ure. Under-inflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that
the TPMS is not a substitute for proper tire main-
tenance, and it is the driver's responsibility to
maintain correct tire pressure, even if under-infla-
tion has not reached the level to trigger illumina-
tion of the TPMS low tire pressure telltale.

Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS mal-
function indicator is combined with the low tire
pressure telltale.

When the system detects a malfunction, the tell-
tale will flash for approximately one minute and
then remain continuously illuminated. This
sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When
the malfunction indicator is illuminated, the sys-
tem may not be able to detect or signal low tire
pressure as intended.

TPMS malfunctions may occur for a variety of
reasons, including the installation of replacement
or alternate tires or wheels on the vehicle that
prevent the TPMS from functioning properly.
Always check the TPMS malfunction telltale after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or alter-
nate tires and wheels allow the TPMS to con-
tinue to function properly.

Messages in the instrument panel

When the TPMS symbol illuminates, the following
text messages may also be displayed:

•

Tire pressure low

•

Tire pressure system

Temporarily

unavailable

•

Tire pressure system

Service required

If TPMS cannot determine which tire(s) have low
inflation pressure:

•

All four tires will be shown as affected in the
center display

After changing wheels, always calibrate the sys-
tem to avoid false warnings.

TPMS does not replace the need for regular tire
inspection and maintenance.

NOTE

If you change to tires with a different dimen-
sion than the factory-installed ones, the
TPMS system must be calibrated for these
tires.

TPMS cannot be turned off.

WARNING

Incorrect inflation pressure could lead to tire
failure, resulting in a loss of control of the
vehicle.

Related information

•

Checking tire inflation pressure (p. 493)

•

Reinflating tires equipped with the Tire
Pressure Monitoring System (TPMS)
(p. 494)

•

Ignition modes (p. 400)

WHEELS AND TIRES

493

Checking tire inflation pressure

The Tire Pressure Monitoring System (TPMS)
makes it possible to view the current inflation
pressure status of all four tires.

Checking inflation pressure

Open the

Car status

app in

the center display's Application
view. Tap

Status

to see the

current inflation pressure sta-
tus of all four tires.

The on-screen graphic displays the inflation pres-
sure status.

Status view. The illustration is generic and may vary from
model to model or after a software update

Color indications:

Green: tire pressure is above the threshold for a
low inflation pressure warning.

Yellow: low tire pressure.

•

One yellow wheel: the tire indicated is under-
inflated.

•

All wheels yellow: two or more tires are
under-inflated.

Stop safely and check/reinflate the tire(s) as
soon as possible. Calibrate TPMS after reinflating
the tire(s).

All wheels gray:

•

Calibration is underway

•

Inflation pressure status is not known

It might be necessary to drive at a speed of at
least 20 mph (30 km/h) for several minutes for
the system to become operational.

All wheels gray combined with the message

Tire pressure system

Temporarily

unavailable

and the TPMS symbol in the

instrument panel (

) remains illuminated

after flashing for 1 minute: the system is tem-
porarily unavailable. It should become operational
again shortly.

All wheels gray combined with the message

Tire pressure system

Service required

and

the TPMS symbol in the instrument panel
(

) remains illuminated after flashing for

1 minute: the system is not functioning correctly.
Have it checked by a trained and qualified Volvo
service technician.

Related information

•

Calibrating the Tire Pressure Monitoring
System (TPMS) (p. 495)

•

Reinflating tires equipped with the Tire
Pressure Monitoring System (TPMS)
(p. 494)

•

Tire Pressure Monitoring System (TPMS)
(p. 491)

WHEELS AND TIRES

494

Reinflating tires equipped with the

Tire Pressure Monitoring System

(TPMS)

When low tire pressure has been detected, a
message will be displayed in the instrument
panel and the Tire Pressure Monitoring System
symbol will illuminate.

Symbol

Explanation

When the TPMS symbol illuminates
and a message is displayed, check,
reinflate the tire(s) and calibrate
TPMS.

1. Use a tire pressure gauge to check the infla-

tion pressure of all four tires.

2. Re-inflate the tire(s) to the correct pressure.

Consult the tire pressure decal located on
the driver's side B-pillar (the structural mem-
ber at the side of the vehicle, at the rear of
the driver's door opening) or the inflation
pressure table in your printed owner's man-
ual supplement.

3. Calibrate the Tire Pressure Monitoring

System, see the article "Calibrating the Tire
Pressure Monitoring System".

4. In some cases, it may be necessary to drive

the vehicle for several minutes at a speed of
at least 20 mph (30 km/h) to erase the
TPMS telltale warning and the text message.
Please be aware that the TPMS telltale
warning will not go out until the low tire pres-
sure has been corrected and calibration has
been carried out.

NOTE

To help avoid incorrect tire inflation pressure,
if possible only inflate the tires when they are
cold. The tires are considered to be cold
when they have the same temperature as the
surrounding (ambient) air. This temperature is
normally reached after the vehicle has been
parked for at least 3 hours. After driving a dis-
tance of approximately 1 mile (1.6 km), the
tires are considered to be warm.

CAUTION

When inflating tires, press the pump's mouth-
piece straight onto the valve to help avoid
bending or otherwise damaging the valve.

CAUTION

•

After inflating the tires, always reinstall
the valve cap to help avoid damage to the
valve from dirt, gravel, etc.

•

Use plastic valve caps only. Metal caps
could corrode and become difficult to
remove.

WARNING

•

Incorrect inflation pressure could lead to
tire failure, resulting in a loss of control of
the vehicle.

•

Tire monitoring systems cannot indicate
sudden tire damage caused by external
factors (e.g., a blowout) in advance.

Related information

•

Tire Pressure Monitoring System (TPMS)
(p. 491)

•

Checking tire inflation pressure (p. 493)

•

Calibrating the Tire Pressure Monitoring
System (TPMS) (p. 495)

WHEELS AND TIRES

495

Calibrating the Tire Pressure

Monitoring System (TPMS)

In order for the Tire Pressure Monitoring System
to work properly, tire pressure reference values
must be set correctly. This must be done each
time wheels are changed or tire pressures are
modified.

Calibrating TPMS

To calibrate the system:

1. Switch off the engine.

2. Re-inflate the tire(s) to the correct pressure.

3. Start the engine.

4. Open the

Car status

app in the center dis-

play's App view.

5. Tap

Status

to access Tire Pressure

Monitoring System.

6. Tap the calibration button.

7. Tap

after the tire pressure in all four tires

has been checked and adjusted.

8. Drive the vehicle.

> The calibration process will be completed

while driving and will be interrupted if the
vehicle is parked and the engine is
switched off. Calibration continues auto-
matically when driving resumes.

When enough data has been collected to detect
a low tire pressure situation, the tires' color in the
center display will change to green. The system
will not give any text confirmation when calibra-
tion is finished although it will state if calibration
fails. When driving with heavy loads or at sus-
tained highway speeds, the tire pressure should
be adjusted to the recommended inflation pres-
sures.

After adjusting inflation pressure, repeat steps
1-8.

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 parked with the engine
running to access the calibration button 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

•

Tire Pressure Monitoring System (TPMS)
(p. 491)

WHEELS AND TIRES

* Option/accessory, for more information, see Introduction.

496

Tire sealing system

The vehicle is equipped with a tire sealing sys-
tem that enables you to temporarily seal a hole in
the tread surface and re-inflate a flat tire, or to
adjust a tire’s inflation pressure.

Location

The tire sealing system is located under the floor
of the cargo compartment.

Location of the tire sealing system

Introduction

The tire sealing system consists of an air com-
pressor, a container for the sealing compound,
wiring to connect the system to the vehicle’s
electrical system via one of the 12-volt sockets,
and a hose used to connect the system to the
tire’s inflation valve.

NOTE

The tire sealing system's compressor has
been tested and approved by Volvo.

The 12-volt sockets are located in the front tun-
nel console, on the rear side of the center con-
sole in the rear seat and in the cargo area

Accessing the tire sealing system

The tire sealing system is stowed under the floor
of the cargo area. To access it:

1. Lift the floor hatch in the cargo area.
2. Lift out the tire sealing system.

NOTE

•

The tire sealing system is only intended
to seal holes on the tire’s tread area, not
the sidewall.

•

Tires with large holes or tears cannot be
repaired with the tire sealing system.

•

After use, stow the tire sealing system
properly to help prevent rattling.

WARNING

•

After using the tire sealing system, the
vehicle should not be driven farther than
approximately 120 miles (200 km).

•

Have the tire inspected by a trained and
qualified Volvo service technician as soon
as possible to determine if it can be per-
manently repaired or must be replaced.

•

The vehicle should not be driven faster
than 50 mph (80 km/h) while using a tire
that has been temporarily repaired with
the tire sealing system.

•

After using the tire sealing system, drive
carefully and avoid abrupt steering
maneuvers and sudden stops.

Sealing compound container

The sealing compound container must be
replaced if the tire sealing system has been used
to repair a tire or if the container’s expiration date
has passed (see the date on decal).

WHEELS AND TIRES

497

NOTE

•

After use, the sealing compound bottle,
the hose, and certain other system com-
ponents must be replaced. Please con-
sult your Volvo retailer for replacement
parts.

•

If the sealing compound bottle’s expira-
tion date has passed, please take it to a
Volvo retailer or a recycling station that
can properly dispose of harmful sub-
stances.

WARNING

Please keep the following points in mind
when using the tire sealing system:

•

The sealing compound bottle (no. 8 in the
illustration) contains 1) rubber latex, natu-
ral and 2) ethanediol. These substances
are harmful if swallowed.

•

The contents of this bottle may cause
allergic skin reactions or otherwise be
potentially harmful to the respiratory tract,
the skin, the central nervous system, and
the eyes.

Precautions:

•

Keep out of reach of children.

•

Do not ingest the contents.

•

Avoid prolonged or repeated contact with
the skin.

•

Wash thoroughly after handling.

First aid:

•

Skin: Wash affected areas of skin with
soap and water. Get medical attention if
symptoms occur.

•

Eyes: Flush with plenty of water for least
15 minutes, occasionally lifting the upper
and lower eyelids. Get medical attention if
symptoms occur.

•

Inhalation: Move the exposed person to
fresh air. If irritation persists, get medical
attention.

•

Ingestion: Do NOT induce vomiting
unless directed to do so by medical per-
sonnel. Get medical attention.

•

Disposal: Dispose of this material and its
container to a hazardous or special waste
collection point.

Related information

•

Inflating a tire with the tire sealing system
compressor (p. 501)

•

Using the tire sealing system (p. 498)

WHEELS AND TIRES

498

Using the tire sealing system

Overview

Electrical wire

Hose

Air release valve

Protective hose cover

Speed limit sticker (on the rear side of the
compressor)
Bottle holder (orange cover)

Air pressure gauge

Bottle with sealing compound

On/Off switch

Connecting

1. Activate the vehicle's hazard warning flashers

if the tire sealing system is to be used in an
area with traffic.

If the flat tire was caused by a nail, etc., do
not remove it from the tire. It will help to seal
the hole.

2. Peel off the speed limit sticker and affix it to

the windshield so that it is clearly visible to
the driver. The vehicle should not be driven
faster than 50 mph (80 km/h) while using a
tire that has been temporarily repaired with
the tire sealing system.

3. Ensure that the on/off switch is in position 0

and take out the electrical wire and hose.

NOTE

Do not break the seal on the bottle. This
occurs automatically when the bottle is
screwed into the holder.

WARNING

Contact with the sealing compound may
cause skin irritation. If contact occurs, wash
the affected area immediately with soap and
water.

4. Unscrew the orange cover over the bottle

holder on the compressor and unscrew the
cap on the bottle of sealing compound.

5. Screw the bottle into the bottle holder as far

as possible.

WARNING

The bottle is equipped with a catch to keep it
securely in place and help prevent sealing
compound leakage. Once in place, the bottle
cannot be unscrewed. This must be done by a
trained and qualified Volvo service technician.

Volvo XC90 T8 Twin Engine Plug-in Hybrid (2017 year). Instruction - part 29