BMW 2 Series Owner's Handbook Manual page 304

MOBILITY
Control message is shown. Tyre pressure los-
ses may not be detected.
Measure
▷ A wheel without wheel electronics is moun-
ted: have the wheels checked if necessary.
▷ Fault due to systems or devices with the
same radio frequency: the system is auto-
matically reactivated upon leaving the field
of interference.
▷ For tyres with special approval: the system
was unable to complete the reset. Perform
a system reset again.
▷ Tyre Pressure Monitor malfunction: have
the system checked by a Service Partner of
the manufacturer or another qualified Serv-
ice Partner or specialist workshop.
Flat tyre monitor
Principle
The flat tyre monitor detects a tyre pressure
loss while driving and issues a warning if the
tyre pressure has dropped.
General
The system identifies a tyre pressure loss by
comparing the rotational speeds of the individ-
ual wheels during the journey.
A tyre pressure loss changes the diameter,
and with it the rotational speed, of the corre-
sponding wheel. The discrepancy is detected
and reported as a flat tyre.
The system does not measure the tyre infla-
tion pressure as such.
Operating requirements
The following requirements must be met for
the system, otherwise reliable message of a
tyre pressure loss is not ensured:
304
Wheels and tyres
Online Edition for Part no. 01405A5E758 - VI/22
▷ After a tyre or wheel change, an initialisa-
tion was carried out at the correct tyre infla-
tion pressure.
▷ The system must be initialised after the
tyre inflation pressure is adjusted to a new
value.
Status display
It is possible to display the current status of
the Flat Tyre Monitor, for example to check
whether the Flat Tyre Monitor is active.
1. "MENU"
2. "Vehicle apps"
3. "Vehicle status"
4. "Flat Tyre Monitor"
The status is displayed.
Initialisation required
An initialisation must be performed in the
following situations:
▷ After adjusting the tyre inflation pressure.
▷ After tyre/wheel change.
Initialisation
Initialisation saves the set tyre inflation pres-
sures as reference values for subsequent de-
tection of a flat tyre. Initialisation is started by
confirming the correct tyre inflation pressures.
Do not initialise the system if driving with snow
chains fitted.
1. "MENU"
2. "Vehicle apps"
3. "Vehicle status"
4. "Flat Tyre Monitor"
5. Switch on drive-ready state but do not drive
off.
6. Start the initialisation: "Perform reset"
7. Drive off.
Initialisation is completed while driving which
can be interrupted at any time.