BMW C 400 X Rider's Manual page 135

What are the design
features of the
BMW Motorrad ABS?
The BMW Motorrad ABS en-
sures stability on all surfaces,
within the limits set by driving
dynamics. The system is not
optimized for the special condi-
tions encountered under extreme
weather during off-road and race-
track use.
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 error is indicated. A self-
diagnosis routine must be com-
pleted before the error will be
displayed.
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Apart from problems on the
BMW Motorrad ABS, unusual
riding conditions can also cause
a fault message to be generated.
Unusual riding conditions
Rear wheel rotating with the
vehicle held stationary by ap-
plying the front brake (burn-
out).
Rear wheel slipping over a
smooth roadway over a longer
period, e.g. when decelerating
with the braking effect of the
engine.
Should a fault code occur due to
an unusual driving condition, the
ABS function can be reactivated
by switching the ignition off and
then on again.
How important is regular
maintenance?
WARNING
Brake system not regularly
serviced
Accident hazard
To ensure that the
BMW Motorrad ABS is in a
properly maintained condition,
it is vital that the specified
service intervals are kept to.
Reserves for safety
But remember, the potentially
shorter braking distances which
the BMW Motorrad ABS per-
mits must not be used as an ex-
cuse for careless riding. ABS is
primarily a means of ensuring a
safety margin in genuine emer-
gencies.
Be careful in curves! When
you apply the brakes in curves,
the laws of driving dynamics
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