BMW Motorrad F 900 XR, Rider'S Manual

Page: 135 / 261

The additional inclined posi-
tion and acceleration informa-
tion enables the DTC to make
more precise and comfortable
adjustments.
The traction control compares
the wheel circumferential veloc-
ities of the front and rear wheel.
The slip, and with it the stabil-
ity reserves at the rear wheel,
are determined from the speed
difference. The engine control
adapts the engine torque when
the slip limit is exceeded.
BMW Motorrad ASC/DTC is
designed as an assistance sys-
tem for the rider and for riding
on public roads. The extent to
which the rider affects ASC/
DTC control can be considerable
(weight shifts when cornering,
loose luggage on the motorcy-
cle), especially when approaching
the limits imposed by the laws of
physics.
The system is not optimized
for the special conditions en-
countered under the extreme
conditions of competitive off-
road and racetrack use. The
BMW Motorrad ASC/DTC can be
switched off in such instances.
WARNING
Risky riding style
Accident hazard despite ASC/
DTC
The rider is always responsi-
ble for adapting his/her driving
style.
Do not reduce the system's ex-
tra safety margin with careless
riding or unnecessary risks.
Special situations
As lean angles increase, accel-
eration capability is also progres-
sively restricted by the laws of
physics. This can result in re-
duced acceleration when coming
out of very tight curves.
To detect spinning or slipping
away of the rear wheel, among
other things the speeds of the
front and rear wheel are com-
pared and the angle with DTC
compared to ASC is taken into
account.
with riding modes Pro
OE
If the values for the angle are
detected to be implausible for a
long period, a replacement value
is used for the angle, or the DTC
function is switched off. In these
cases, a DTC error is displayed.
A self-diagnosis routine must be
completed before the fault mem-
ory entry will be displayed.
Under the following unusual rid-
ing conditions, BMW Motorrad
Traction Control may be deacti-
vated automatically.
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