BMW F 800 ST Wartungshandbuch PDF herunterladen (Seite 78)

momentum take over and even

BMW Motorrad ABS is unable to

counteract their effects.

Tyre pressure

monitoring RDC

OE

Function

A sensor integrated into each

tyre measures the air temperat-

ure and the air pressure inside

the tyre and transmits this in-

formation to the control unit.

Each sensor has a centrifugal-

force tripswitch that does not

enable transmission of the meas-

ured values until the motorcycle

has accelerated to about 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 sig-

nals for approximately 15 minutes

after the motorcycle comes to a

stop.

The control unit can adminis-

trate four sensors, so two dif-

ferent sets of wheels with RDC

sensors can be alternated on

the motorcycle. An error mes-

sage is issued if wheels without

sensors are fitted to a motorcycle

equipped with an RDC control

unit.

Temperature

compensation

The tyre-pressure readings

shown by the multifunction

display are temperature-

compensated; the reference tyre

temperature for these readings

is always 20 °C. The air lines

available to the public in petrol

stations and motorway service

areas almost invariably show

temperature-dependent tyre

pressures, so in most instances

these gauge readings will not

tally with the readings shown by

the multifunction display.

Tyre-pressure ranges

The RDC control unit differenti-

ates between three air-pressure

ranges, all of which are paramet-

erised for the motorcycle:

Air pressure within permitted

tolerance.

Air pressure close to limit of

permitted tolerance.

Air pressure outside permitted

tolerance.

6

74

z

Engineering details

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