BMW ONBOARD COMPUTER Wartungshandbuch Seite 76

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The control unit can administrate
four sensors, so two different
sets of wheels with RDC sensors
can be alternated on the vehicle.
An error message is issued if
wheels without sensors are fitted
to a motorcycle 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-
erised 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, on the style of rid-
ing and the duration of the ride.
The tyre-pressure readings
shown by the multifunction
display are temperature-
compensated. They are based
on a tyre air temperature of 20
°C. The gauges on forecourt
air lines do not compensate for
temperature. The tyre pressure
recorded depends on tyre air
temperature. In most instances,
therefore, these gauge readings
will not tally with the pressures
shown by the multifunction
display.
Pressure adaptation
Compare the RDC value on
the multifunction display with
the value in the table on the
inside cover of the Rider's
Manual. Then use the air line to
compensate for the difference
between the RDC reading and
the value in the table.
Example: according to the
Rider's Manual, tyre pressure
should be 2.5 bar, but the
reading in the multifunction
display is 2.3 bar. The gauge on
the air line shows 2.4 bar. You
must now increase tyre pressure
by the 0.2 bar difference
between the value in the table
and the RDC reading; when the
air-line gauge shows 2.6 bar,
the tyre is inflated to the correct
pressure.
6
74
z
Engineering details
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