Volvo C70 Convertible (2010 year). Manual

07 Wheels and tires

Glossary of tire terminology

181

Terminology

•

Tire information placard: A placard
showing the OE (Original Equipment) tire
sizes, recommended inflation pressure,
and the maximum weight the vehicle can
carry.

•

Tire Identification Number (TIN): A num-
ber on the sidewall of each tire providing
information about the tire brand and man-
ufacturing plant, tire size and date of man-
ufacturer.

•

Inflation pressure: A measure of the
amount of air in a tire.

•

Standard load: A class of P-metric or Met-
ric tires designed to carry a maximum load
at 35 psi [37 psi (2.5 bar) for Metric tires].
Increasing the inflation pressure beyond
this pressure 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
tires load carrying capability.

•

kPa: Kilopascal, a metric unit of air pres-
sure.

•

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 perim-
eter 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 kilo-
grams that can be carried by the tire. This
rating is established by the tire manufac-
turer.

•

Maximum permissible inflation pres-
sure: 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
inflation pressure is affected by the number
of occupants in the car, the amount of
cargo, and the speed at which the vehicle
will be driven for a prolonged period. This
information can be found on the tire infla-
tion 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-
perature is normally reached after the car
has been parked for at least 3 hours.

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

07 Wheels and tires

Vehicle loading

182

Loading the vehicle

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 Vehicle Safety Standards (FMVSS/
CMVSS) label, and the vehicle's tire informa-
tion 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 equip-
ment.

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.

NOTE

For trailer towing information, please refer to
the section "Towing a trailer", see
page 158.

Permissible axle weight

The maximum allowable weight that can be
carried by a single axle (front or rear). These
numbers 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 + passen-
gers.

NOTE

•

The location of the various labels in your
vehicle can be found on page 264.

•

A table listing important weight limits for
your vehicle can be found on page
267.

Steps for Determining Correct Load
Limit

Locate the statement "the combined
weight of occupants and cargo should
never exceed XXX pounds" on your vehi-
cle's placard.

Determine the combined weight of the
driver and passengers that will be riding in
your vehicle.

Subtract the combined weight of the driver
and passengers from XXX kilograms or
XXX pounds.

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 lbs. passengers in your vehicle, the
amount of available cargo and luggage
load capacity is 650 lbs. (1400–750 (5×150)
= 650 lbs.)

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.

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
luggage load capacity of your vehicle.

See "Towing a trailer"

07 Wheels and tires

Uniform tire quality gradings

184

Uniform tire quality gradings

ALL PASSENGER VEHICLE TIRES MUST
CONFORM TO FEDERAL SAFETY
REQUIREMENTS IN ADDITION TO THESE
GRADES

Quality grades can be found, where appli-
cable, 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 gra-
ded 150 would wear one and one half (1 1/2)
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 signifi-
cantly from the norm due to variation in driving
habits, maintenance practices 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 sur-

faces of asphalt and concrete. A tire marked C
may have poor traction performance. The trac-
tion grade assigned to this tire is based on
braking (straight-ahead) traction tests and is
not a measure 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
(turning) traction.

TEMPERATURE

The temperature grades are AA (the highest),
A, B, and C, representing the tire's resistance
to the generation of heat and its ability to dis-
sipate heat when tested under controlled con-
ditions on a specified indoor laboratory test
wheel. Sustained high temperature can cause
the material of the tire to degenerate and
reduce tire life, and excessive temperature can
lead to sudden tire failure. The grade C corre-
sponds 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 per-
formance 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-
inflation, or excessive loading, either sepa-
rately or in combination, can cause heat
buildup and tire failure.

07 Wheels and tires

Snow chains, snow tires, studded tires

185

Snow chains

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
different 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.

Consult your Volvo retailer for additional snow
chain information.

CAUTION

•

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

•

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

•

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.

Snow tires, studded tires

Tires for winter use:

•

Owners who live in or regularly commute
through areas with sustained periods of
snow or icy driving conditions are strongly
advised to fit suitable winter tires to help
retain the highest degree of traction.

•

It is important to install winter tires on all
four wheels to help retain traction during
cornering, braking, and accelerating. Fail-

ure to do so could reduce traction to an
unsafe level or adversely affect handling.

•

Do not mix tires of different design as this
could also negatively affect overall tire road
grip.

•

Winter tires wear more quickly on dry roads
in warm weather. They should be removed
when the winter driving season has ended.

•

Studded tires should be run-in
300–600 miles (500–1000 km) during
which the car should be driven as smoothly
as possible to give the studs the opportu-
nity to seat properly in the tires. The tires
should have the same rotational direction
throughout their entire lifetime.

NOTE

Please consult state or provincial regula-
tions restricting the use of studded winter
tires before installing such tires.

07 Wheels and tires

Temporary spare

186

Temporary spare

The spare tire in your vehicle

is called a "Tem-

porary Spare".

Recommended tire pressure (see the placard
on the B-pillar or on the fuel filler door) should
be maintained irrespective of which position on
the car the temporary spare tire is used.

In the event of damage to this tire, a new one
can be purchased from your Volvo retailer.

WARNING

Current legislation prohibits the use of the
"Temporary Spare" tire other than as a tem-
porary replacement for a punctured tire. It
must be replaced as soon as possible by a
standard tire. Road holding and handling
may be affected with the "Temporary
Spare" in use. Do not exceed a speed of
50 mph (80 km/h) with the "Temporary
Spare" in use.

CAUTION

The car must not be driven with wheels of
different dimensions or with a spare tire
other than the one that came with the car.
The use of different size wheels can seri-
ously damage your car's transmission.

Not on models equipped with the Tire sealing system.

07 Wheels and tires

Wheel nuts

187

Wheel nuts

G020324

Low nut.

High nut.

There are two different types of wheel nut,
depending on whether the wheels are steel or
aluminum.

Steel rims – low nut

Steel rims are normally secured using the low
type of nut, although steel rims may also use
the high type.

WARNING

Never use the short type of nut for alumi-
nium wheels. This could cause the wheel to
come loose.

Aluminum wheels – high nut

Only the high type of nut can be used for alu-
minum wheels. This is considerably different
from other types of nut because it has a rotat-
ing conical thrust washer.

NOTE

This nut can also be used on steel wheels.

Lockable wheel nut

If steel wheels with lockable wheel nuts are
used in combination with wheel covers, the
lockable wheel nut must be fitted to the stud
nearest the air valve. The wheel cover cannot
otherwise be installed on the wheel.

07 Wheels and tires

Changing a wheel

188

Changing a wheel

G020331

The spare tire, jack, and crank are located
under the carpet on the floor of the trunk.

To change a tire:

Apply the parking brake.

Put the gear selector in Park (P) or reverse
on models with a manual transmission.

Block the wheels that are on the ground
with wooden blocks or large stones.

Remove the wheel cover (where applica-
ble) using the lug wrench in the tool bag.

G020332

With the car still on the ground, use the lug
wrench to loosen the wheel nuts 1/2–1 turn
by exerting downward pressure. Turn the
nuts counterclockwise to loosen.

There are two jack attachment points on
each side of the car. Position the jack cor-
rectly in the attachment (see the illustration)
and crank while simultaneously guiding the
base of the jack to the ground. The base of
the jack must be flat on a level, firm, non-
slippery surface. Before raising the car,
check that the jack is still correctly posi-
tioned in the attachment.

Jack attachment points

Raise the vehicle until the wheel to be
changed is lifted off the ground.

Unscrew the wheel nuts completely and
carefully remove the wheel so as not to
damage the threads on the studs.

07 Wheels and tires

Changing a wheel

189

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 car supported by a
jack.

•

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

•

Apply the parking brake and put the
gear selector in the Park (P) position or
reverse on models with a manual trans-
mission.

•

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.

Installing the wheel

Clean the contact surfaces on the wheel
and hub.

Lift the wheel and place it on the hub.

Install the wheel nuts and tighten hand-
tight. Using the lug wrench, tighten cross-
wise until all nuts are snug.

Lower the vehicle to the ground and alter-
nately tighten the bolts crosswise to
81 ft. lbs. (110 Nm).

Install the wheel cover (where applicable).

Returning the jack to its storage space

The jack (certain models) and tools should be
returned to their correct storage places after
use.

•

On vehicles equipped with a jack and
spare wheel, the jack should be cranked
down and returned to its storage position
after use.

•

On vehicles equipped with the tire sealing
system, the jack should be cranked down
as far as possible and returned to its stor-
age position in the foam block.

WARNING

The jack and any tools should always be
returned to their proper storage compart-
ments after use to help keep them securely
in place in the event of sudden braking, etc.

07 Wheels and tires

Tire Sealing System

190

Option/accessory, for more information, see Introduction.

Introduction

Certain models are equipped with a tire sealing
system* 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.

The system consists of an air compressor, 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.

The 12-volt socket is located in the front tunnel
console.

Accessing the tire sealing system

The tire sealing system is stowed in the com-
partment in the rear side of the ski hatch in the
center of the rear seat backrest. See page
115 for information on opening this hatch.

Lift the floor hatch in the trunk.

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 permanently 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.

Tire sealing system–overview

G020400

Speed limit sticker

On/Off switch

Electrical wire

Bottle holder (orange cover)

Protective hose cover

Air release knob

Hose

Bottle with sealing compound

Air pressure gauge

07 Wheels and tires

Tire Sealing System

191

WARNING

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

•

The sealing compound bottle (no. 8 in
the illustration) contains 1.2-Ethanol
and natural rubber-latex. These sub-
stances are harmful if swallowed.

•

The contents of this bottle may cause
allergic skin reactions or otherwise be
potentially harmful to the skin, the cen-
tral 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.

•

Hands should be washed 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 person to fresh air.
If irritation persists, get medical atten-
tion.

Tire sealing system–temporarily
repairing a flat tire

G019723

Temporarily repairing a flat tire is done in two
stages:

•

Stage 1: The hole is sealed by pumping
sealing compound into the tire. The car is
then driven a short distance to distribute
the sealing compound in the tire.

NOTE

Do not remove any foreign objects (nails,
etc.) from the tire before using the sealing
system.

•

Stage 2: The tire’s inflation pressure is
checked and adjusted if necessary.

WARNING

•

Never leave the tire sealing system
unattended when it is operating.

•

Keep the tire sealing system away from
children.

•

Be sure the vehicle is parked safely off
the road and away from moving traffic.

•

Apply the parking brake.

Stage 1: Sealing the hole

Open the cover on the tire sealing kit.

Peel off the speed limit sticker and affix it
to the steering wheel hub where it will be
clearly visible to the driver.

Ensure that the on/off switch is in posi-
tion 0 (the 0 side of the switch should be
pressed down).

07 Wheels and tires

Tire Sealing System

192

Put on the gloves included in the tire seal-
ing system.

WARNING

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

Unscrew the orange cover over the bottle
holder and unscrew the cap on the bottle
of sealing compound.

NOTE

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

Screw the bottle into the bottle holder.

WARNING

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

Remove the valve cap from the tire’s infla-
tion valve and screw the tire sealing sys-
tem’s hose connector onto the valve as
tightly as possible by hand.

Connect the electrical wire to the nearest
12-volt socket in the vehicle.

Start the vehicle’s engine.

10. Start the tire sealing system’s compressor

by pressing the on/off switch to position I.

WARNING

•

Never stand next to the tire being inflated
when the compressor is in operation.

•

If cracks, bubbles, etc. form on the tire,
switch off the compressor immediately.

•

If there is visible damage to the sidewall
or the rim, the tire cannot be repaired.
The vehicle should not be driven if this
occurs. Contact a towing service or
Volvo On Call Roadside Assistance if
applicable.

NOTE

The air pressure gauge will temporarily
show an increase in pressure to approxi-
mately 88 psi (6 bar) while the sealing com-
pound is being pumped into the tire. The
pressure should return to a normal level
after approximately 30 seconds.

11. Within seven minutes, inflate the tire to

between 22—44 psi (1.8—3.0 bar). Switch
off the compressor briefly to get a clear
reading from the pressure gauge. The
compressor should not be used for more
than 10 minutes at a time to avoid over-
heating.

CAUTION

The compressor should not be used for
more than 10 minutes at a time to avoid
overheating.

WARNING

If the pressure remains below 22 psi
(1.8 bar) after approximately seven minutes,
turn off the compressor. In this case, the
hole is too large to be sealed and the vehicle
should not be driven.

07 Wheels and tires

Tire Sealing System

193

12. Switch off the compressor and disconnect

the electrical wire from the 12-volt socket.

13. Unscrew the hose from the tire’s inflation

valve and reinstall the valve cap.

14. Immediately drive the vehicle for approxi-

mately 2 miles (3 km) at a maximum speed
of 50 mph (80 km/h) to distribute the seal-
ing compound in the tire.

CAUTION

If your vehicle is equipped with the Tire
Pressure Monitoring System (TPMS), the
use of the sealing compound may lead to
incorrect tire pressure readings or in rare
cases, damage to the tire pressure sensor.
Use the tire sealing system to check and
adjust the damaged tire's inflation pressure.

NOTE

•

Safely stow the tire sealing system in a
convenient place as it will soon be used
again to check the tire’s inflation pres-
sure.

•

The empty bottle of sealing compound
cannot be removed from the bottle
holder. Consult a trained and qualified
Volvo service technician to have the
bottle removed and properly disposed
of.

WARNING

If heavy vibrations, unsteady steering
behavior, or noises should occur while driv-
ing, reduce speed and park the vehicle in a
safe place. Recheck the tire for bumps,
cracks, or other visible damage, and
recheck its inflation pressure. If the pressure
is below 19 psi (1.3 bar), do not continue
driving. Have the vehicle towed to a trained
and qualified Volvo service technician.

Stage 2: Checking inflation pressure

Connect the tire sealing system as descri-
bed in stage 1.

Refer to the inflation pressure tables for the
correct inflation pressure. If the tire needs
to be inflated, start the tire sealing system’s
compressor. If necessary, release air from
the tire by turning the air release knob
counterclockwise.

CAUTION

The compressor should not be used for
more than 10 minutes at a time to avoid
overheating.

WARNING

If you interrupt your trip for more than 1
hour, check the inflation pressure in the
damaged tire again before continuing.

Replacing the sealing compound
container

The sealing compound container must be
replaced if:

•

the tire sealing system has been used to
repair a tire

•

the container’s expiration date has passed
(see the date on decal).

NOTE

•

After use, the sealing compound bottle,
the hose, and certain other system
components must be replaced. Please
consult your Volvo retailer for replace-
ment parts.

•

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

07 Wheels and tires

Tire Sealing System

194

Inflating tires

The tire sealing system can be used to inflate
the tires. To do so:

Park the car in a safe place.

The compressor should be switched off.
Ensure that the on/off switch is in posi-
tion 0 (the 0 side of the switch should be
pressed down).

Take out the electrical wire and hose.

Remove the valve cap from the tire’s infla-
tion valve and screw the hose connector
onto the valve as tightly as possible by
hand.

Connect the electrical wire to the nearest
12-volt socket in the vehicle.

Start the vehicle’s engine.

WARNING

•

The vehicle’s engine should be running
when the tire sealing system is used to
avoid battery drain. Therefore, be sure
the vehicle is parked in a well ventilated
place, or outdoors, before using the sys-
tem.

•

Children should never be left unattended
in the vehicle when the engine is running.

Check the tire’s inflation pressure on the
gauge. Switch off the compressor briefly to
get a clear reading from the pressure
gauge.

Refer to the tire inflation tables for the cor-
rect inflation pressure. If the tire needs to
be inflated, start the tire sealing system’s
compressor (press the on/off switch to
position I). If necessary, release air from the
tire by turning the air release knob coun-
terclockwise.

CAUTION

The compressor should not be used for
more than 10 minutes at a time to avoid
overheating.

Turn off the compressor (press the on/off
switch to position 0) when the correct infla-
tion pressure has been reached.

10. Unscrew the hose from the tire’s inflation

valve and reinstall the valve cap.

11. Disconnect the electrical wire from the

12-volt socket.

07 Wheels and tires

Tire Pressure Monitoring System (TPMS)

195

Introduction

The tire pressure monitoring system uses sen-
sors mounted in the tire valves to check infla-
tion pressure levels. When the vehicle is mov-
ing at a speed of approximately 20 mph
(30 km/h) or faster, these sensors transmit
inflation pressure data to a receiver located in
the vehicle.

NOTE

USA – FCC ID: KR5S122780002

This device complies with part 15 of the
FCC rules. Operation is subject to the fol-
lowing conditions: (1) This device may not
cause harmful interference, and (2) this
device must accept any interference
received, including interference that may
cause undesired operation.

When low inflation pressure is detected, TPMS
will light up the tire pressure warning light
(also referred to as a telltale) in the instrument
panel and will display one of the following mes-
sages in the text window:

LOW TIRE PRESS.

CHECK TIRES

VERY LOW TIRE

PRESSURE

NOTE

If a fault occurs in TPMS, the tire pressure
warning light will flash for approximately
1 minute and

TIRE PRESS SYST

SERVICE REQUIRED

will be displayed.

Each tire, including the spare (if provided),
should be checked monthly when cold and
inflated to the inflation pressure recommended
by the vehicle 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 pressure 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 pres-
sure. Driving on a significantly under-inflated
tire causes the tire to overheat and can lead to
tire failure. 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 maintenance, and it is the driv-

er's responsibility to maintain correct tire pres-
sure, even if under-inflation has not reached
the level to trigger illumination 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 malfunction indicator is combined with
the low tire pressure telltale . When the system
detects a malfunction, the telltale 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 mal-
function indicator is illuminated, the system
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 alternate tires
and wheels allow the TPMS to continue to
function properly.

07 Wheels and tires

Tire Pressure Monitoring System (TPMS)

196

NOTE

•

TPMS indicates low tire pressure but
does not replace normal tire mainte-
nance. For information on correct tire
pressure, please refer to the tables
beginning on page 177, or consult your
Volvo retailer.

•

The tire pressure warning light will not
identify which tire is underinflated. Be
sure to check all four tires.

•

A certain amount of air seepage from
the tires occurs naturally and tire pres-
sure fluctuates with seasonal changes
in temperature. Always check tire pres-
sure regularly.

Erasing warning messages

When a low tire pressure warning message has
been displayed, and the tire pressure warning
light has come on:

Use a tire pressure gauge to check the
inflation pressure of all four tires.

Re-inflate the tire(s) to the correct pressure
(consult the tire pressure placard or the
tables, see page 177 ).

In certain cases, it may be necessary to
drive the vehicle for several minutes at a
speed of 20 mph (30 km/h) or faster. This

will erase the warning text and the warning
light will go out.

WARNING

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

Changing wheels with TPMS

Please note the following when changing or
replacing the factory installed TPMS wheels/
tires on the vehicle:

•

Only the factory-mounted wheels are
equipped with TPMS sensors in the valves.

•

If the vehicle is equipped with a temporary
spare tire, this tire does not have a TPMS
sensor.

•

If wheels without TPMS sensors are moun-
ted on the vehicle,

TIRE PRESS SYST

SERVICE REQUIRED

will be displayed

each time the vehicle is driven above
25 mph (40 km/h) for 10 minutes or more.

•

Once TPMS sensors are properly installed,
the warning message should not reappear.
If the message is still displayed, drive the
vehicle for several minutes at a speed of
20 mph (30 km/h) or faster to erase the
message.

•

Volvo recommends that TPMS sensors be
fitted on all wheels used on the vehicle.

Volvo does not recommend moving sen-
sors back and forth between sets of
wheels.

NOTE

•

If you change to tires with a different
recommended inflation pressure, the
TPMS system must be recalibrated to
these tires. This must be done by an
authorized Volvo retailer or workshop.

•

If a tire is changed, or if the TPMS sen-
sor is moved to another wheel, the sen-
sor's seal, nut, and valve core should be
replaced.

•

When installing TPMS sensors, the
vehicle must be parked for at least
15 minutes with the ignition off. If the
vehicle is driven within 15 minutes, a
TPMS error message will be displayed.

CAUTION

When inflating tires with TPMS valves, press
the pump's mouthpiece straight onto the
valve to help avoid bending or otherwise
damaging the valve.

Volvo C70 Convertible (2010 year). Manual - part 11