climate control VOLVO XC90 2011 Owner´s Manual

07 Wheels and tires
Uniform Tire Quality Grading
07
183
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
TREADWEARThe 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.
TRACTIONThe 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.
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.
TEMPERATUREThe 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 excessive temperature can lead to
sudden tire failure. The grade C corresponds
to a minimum level of performance that all pas-
senger vehicle tires must meet under the Fed-
eral 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-
inflation, or excessive loading, either sepa-
rately or in combination, can cause heat
buildup and tire failure.

12 Index
12
294
1, 2, 3 ...
12-volt sockets.......................................... 79
A
A/C (air conditioning)...........................98, 99
ABS.......................................................... 149
Accessory installation warning.................. 15
Airbag system............................................ 23
Air cleaner................................................ 213
Air conditioning.......................................... 94
Air distribution...................................... 96, 99
Air quality sensor....................................... 98
Air vents..................................................... 96
Alarm........................................................ 131
All Wheel Drive......................................... 148
All Wheel Drive – towing.......................... 157
Anti-lock brake system
warning light......................................... 60
Anti-lock Brake System (ABS)................. 149
Ashtray..................................................... 114Audio
system introduction............................ 244
Audio system
HD digital radio................................... 251
Rear seat entertainment..................... 270
Sirius satellite radio............................255
AUTO (climate control)....................... 99, 100
Automatic transmission........................... 144
Autostart..........................................139, 141
AUX (audio system).................................259
Average speed........................................... 75
AWD......................................................... 148
B
Bass......................................................... 247
Battery..................................................... 211
maintenance....................................... 220
specifications...................................... 287
Battery – replacing................................... 221
Belt check................................................ 212
Black box................................................... 13
Blind Spot Information System (BLIS)..... 165
Blower (fan).............................................. 100Bluetooth cell phone connection............. 265
Booster cushion
accessory............................................. 46
integrated.............................................. 51
Brake fluid................................................ 218
Brake system........................................... 149
Bulbs........................................................ 223
Bulbs, replacing....................................... 223
C
Capacities, fluids..................................... 282
Capacity weight....................................... 182
Cargo area cover..................................... 121
Cargo grid................................................ 120
Cargo net................................................. 118
Catalytic converter, three-way................. 289
CD Pause................................................. 261
Cell phone, hands-free connection......... 265
Center console buttons............................. 64
Central locking system - remote key....... 125
Changing a wheel.................................... 193
Changing coolant....................................212