Audi A4 - Page 42

Driver information system40
The tyre pressure monitoring system makes use of the ABS sensors
to compare the rolling circumference and the vibration of the
wheels. The display in the instrument cluster alerts the driver if
changes are detected on one or more wheels. If only one tyre is
affected, the display will indicate its position ⇒ fig. 27.
Each time you change a tyre or the tyre pressures on your vehicle,
you must store the new tyre pressures via the sound system or
MMI* ⇒ page 41.
The rolling circumference and vibration can change if:
• The tyre pressure is too low
• The tyre has suffered structural damage
• The air pressure in one or more tyres was changed and the new
tyre pressures were not stored ⇒ page 41, “Storing the tyre pres-
sures”
• The wheels were changed and the new tyre pressures were not
stored ⇒ page 41, “Storing the tyre pressures”
• There is a greater load on the wheels of one axle (e.g. if you are
carrying more passengers or luggage)
• The road surface under the left wheels is different to the road
surface under the right wheels for a long period
Warning lamp  / TPMS Tyre pressure ! System malfunction
If the warning lamp  flashes for about a minute and then remains
lit after you switch on the ignition, there is a fault in the system.
TPMS (Tyre Pressure Monitoring System) Tyre pressure ! System
malfunction ⇒ page 40, fig. 28 will also be displayed in the instru-
ment cluster. Please contact the nearest qualified workshop as soon
as possible.
WARNING
• If the tyre pressure warning lamp appears in the instrument
cluster display, slow down immediately and avoid any severe
braking or steering manoeuvres. As soon as you can do so safely,
stop and check the tyres and the tyre pressures.
• It is the driver's responsibility to ensure that the tyre pressures
are correct. For this reason you must check the tyre pressures
regularly.
• Under certain conditions (e.g. driving at high speeds, on ice and
snow or on poor road surfaces) the tyre pressure warning lamp
may not light up immediately or not at all.
• Please ask your Audi dealer or qualified workshop whether run
flat tyres can be used on your vehicle. Unauthorised use of these
tyres can invalidate the vehicle's type approval for use on public
roads. Furthermore, this could cause damage to your vehicle and
possibly also result in an accident.
Fig. 28 Display:
System fault ("System-
störung")
document_0900452a81b1b9de.book Seite 40 Donnerstag, 26. Juli 2007 9:16 09