climate control VOLVO XC90 2010 Owner´s Manual

07 Wheels and tires
Uniform Tire Quality Grading
07
177
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 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.

12 Index
12
280
1, 2, 3 ...
12-volt sockets.......................................... 75
A
A/C (air conditioning)...........................94, 95
ABS.......................................................... 145
Airbag system............................................ 20
Air cleaner................................................ 207
Air conditioning.......................................... 90
Air distribution...................................... 92, 95
Air quality sensor....................................... 94
Air vents..................................................... 92
Alarm........................................................ 127
All Wheel Drive......................................... 144
All Wheel Drive – towing.......................... 152
Anti-lock brake system
warning light......................................... 56
Anti-lock Brake System (ABS)................. 145
Ashtray..................................................... 110
Audio
system introduction............................ 238Audio system
HD digital radio................................... 246
Rear seat entertainment..................... 259
AUTO (climate control)......................... 95, 96
Automatic transmission........................... 140
Autostart..........................................135, 137
AUX (audio system).................................253
Average speed........................................... 71
AWD......................................................... 144
B
Bass......................................................... 241
Battery..................................................... 205
maintenance....................................... 214
specifications...................................... 275
Battery – replacing................................... 215
Belt check................................................ 206
Black box................................................... 11
Black Box (Vehicle Event Data)............... 202
Blind Spot Information System (BLIS)..... 160
Blower (fan)................................................ 96Booster cushion
accessory............................................. 42
integrated.............................................. 47
Brake fluid................................................ 212
Brake system........................................... 145
Bulbs........................................................ 217
Bulbs, replacing....................................... 217
C
Capacities, fluids..................................... 270
Capacity weight....................................... 176
Cargo area cover..................................... 117
Cargo grid................................................ 116
Cargo net................................................. 114
Catalytic converter, three-way................. 277
CD Pause................................................. 255
Center console buttons............................. 60
Central locking system - remote key....... 121
Changing a wheel.................................... 182
Changing coolant....................................206
Charge air cooler..................................... 274
Check Engine warning light....................... 57