BMW K 1200 R - Service Manual download pdf (Page 90)

If the front wheel lifts clear of the

ground under severe accelera-

tion, the ASC reduces engine

torque until the front wheel re-

gains contact with the ground.

Under these circumstances,

BMW Motorrad recommends

rolling the throttle slightly closed

so as to restore stability with the

least possible delay.

When riding on a slippery sur-

face, never snap the throttle

twistgrip fully closed without

pulling the clutch at the same

time. Engine braking torque can

cause the rear wheel to lock, with

a corresponding loss of stability.

The BWM Motorrad ASC is un-

able to control a situation of this

nature.

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.

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86

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Engineering details

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