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subsequent vehicle start-ups as long as the mal-
function exists.
When the malfunct ion indicator is illuminated,
the system may not be able to detect or signa l
low tire pressure as intended. TPMS malfunctions
may occur for a variety of reasons, including the
installation of rep lacement or a lternate 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 .
Introduction
The tire pressure monitoring system monitors air
pressure in all four road wheels while the vehicle
is moving.
As soon as the tire pressure monitoring system
senses a significant loss of a ir pressure in one or
several tires, text messages and ye llow symbo ls
appear in the instrument cluster display to a le rt
the driver. The
[I]
warning light in the instru -
ment cluster comes on when the tire is signifi -
cantly underinflated .
The warning
light [l'J
also illuminates in the case
of a system malfunction.
Be aware that tire pressure is also dependent on
the temperat ure of the t ire. For every 18 °F
(10 °() increase in tire temperature,
tire pressure
increases by about 1.5 psi (0.1 bar) . The tire
warms up while the vehicle is moving and tire
pressure rises. So you shou ld adjust tire pressure
only when they are
cold,
when the temperature
of the tires is roughly the same as the ambient
air temperature.
In order to keep the tire pressure monitoring sys-
tem properly calibrated, tire pressure on all four
tires should be checked at regular intervals .
The tire pressure is shown on the label located on
~
the driver 's side B-pillar (visible when the door is
r--
~
open) .
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,....,
Ti res a n d w h ee l s
A
WARNING
-
When the tire pressure monitoring system
warning light is lit, one or more of your tires is
significantly under- inflated . You should stop
and check your t ires as soon as poss ible, and
inflate them to the proper pressure as indicat-
ed on the vehicle 's t ire pressure label
¢
page 176.
Driving on a significant ly under-
inflated tire causes the tire to overheat and
can lead to tire failure. Under-inflation also is
likely to impair the vehicle's handling and
stopping ability.
@
For the sake of the environment
Driving with under -inflated tires reduces fuel
efficiency and tire tread life.
(D
Tips
- Each tire should be checked monthly when
the temperature
of the tires is about the
same as ambient air temperature
and set to
the recommended inflation pressure as
specified on the tire pressure label
¢page 176.
- The tire pressure mon itoring system helps
the driver to keep an eye on tire pressures.
But the driver still has the responsib ility for
ma inta ining the correct tire pressure.
- Tire pressure must only be adjusted when
the temperature
of the tires is about the
same as amb ient air temperature.
- When tires are replaced, the sensors and
valves should not be exchanged. The valve
core, nut, valve seal ing and seal washer (re-
placement kit) needs to be replaced. If nec-
essary, the valve and the wheel electronics
have to be replaced.
- The tire pressure mon itoring system on your
Audi was calibrated using tires with "RO"
identification. We recommend using these
tires .
- If you sho uld put different wheels and tires
on your vehicle (e.g. winter whee ls and
tires), you must be certain that the wheels
197
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