BMW K 1300 S Rider's Manual page 72

How is the BMW Motorrad
6
Integral ABS noticeable to
the rider?
70
If the ABS system must reduce
the braking forces due to the
conditions described above, then
vibrations can be felt at the hand-
brake lever.
If the handbrake lever is pulled,
then braking pressure is built up
at the rear wheel with the integral
function. If the footbrake lever is
first actuated after this, the brake
pressure already built up can be
felt earlier than the counter-pres-
sure, than when the footbrake
lever is actuated before or to-
z
gether with the handbrake lever.
Lifting off rear wheel
Even during severe braking, a
high level of tire grip can mean
that the front wheel does not
lock up until very late, if at all.
Consequently, ABS does not in-
tervene until very late, if at all.
Under these circumstances the
rear wheel can lift off the ground,
and the outcome can be a high-
siding situation in which the mo-
torcycle can flip over.
Heavy braking can lead to
the rear wheel lifting off the
ground.
When braking, bear in mind
that the ABS control cannot
always be relied on to prevent
the rear wheel from lifting off the
ground.
What are the design
characteristics of the
BMW Motorrad Integral
ABS?
The BMW Motorrad Integral ABS
ensures driving stability on any
surface within the limits of driving
physics. The system is not op-
timized for special requirements
resulting under extreme weather
conditions offroad or on the race-
track.
Special situations
To detect the tendency of the
wheels to lock up, the speeds
of the front and rear wheel are
compared. If implausible values
are detected over a longer period
of time, the ABS function is de-
activated for safety reasons and
an ABS fault is indicated. The
condition for a fault code is the
completed self-diagnosis.
In addition to problems on the
BMW Motorrad Integral ABS,
unusual driving conditions can
also lead to a fault code.
Unusual driving conditions:
Heating up on the main or aux-
iliary stand at idle or with gear
engaged.
Rear wheel locked by the en-
gine brake for a lengthy period,
for example while descending
on a loose surface.