BMW F 750 GS Special vehicle 2018, Rider'S Manual

Page: 194 / 324

Tyre pressure
monitoring (RDC)
with tyre pressure control
(RDC)
OE
Function
A sensor integrated into each
tyre measures the air tempera-
ture and the air pressure inside
the tyre and transmits this in-
formation to the control unit.
The sensors are fitted with a
centrifugal-force trip switch which
allows the measured values to be
transmitted after the minimum
speed is exceeded the first time.
Minimum speed for
transmission of the RDC
measured values:
min 30 km/h
The display shows
--
for each
tyre until the tyre-pressure signal
is received for the first time. The
sensors continue to transmit the
measured-value signals for some
time after the vehicle comes to a
stop.
Transmission duration
of the measured values
after vehicle standstill:
min 15 min
An error message is issued if
wheels without sensors are fit-
ted to a vehicle equipped with an
RDC control unit.
Tyre pressure ranges
The RDC control unit differenti-
ates between three tyre-pressure
ranges, all of which are paramet-
rised for the motorcycle:
Tyre pressure within permitted
tolerance.
Tyre pressure close to limit of
permitted tolerance.
Tyre pressure outside permit-
ted tolerance.
Temperature
compensation
Tyre pressure is a temperature-
sensitive variable: pressure in-
creases as tyre-air temperature
rises and decreases as tyre-air
temperature drops. Tyre-air tem-
perature depends on ambient
temperature as well as on the
style of riding and the duration of
the ride.
The tyre pressures are
shown in the display as
temperature compensated and
always refer to the following
tyre air temperature:
20 °C
The air lines available to the pub-
lic in petrol stations and motor-
way service areas have gauges
that do not compensate for tem-
perature; the reading shown by
a gauge of this nature is the
temperature-dependent tyre-air
pressure. As a result, the val-
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z Engineering details