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The speeds of the front and rear
wheels are compared and the
angle of heel taken into account
as one means of detecting the
rear wheel's incipient tendency to
spin or slip sideways. If the elec-
tronic processor receives values
that it considers implausible over
a lengthy period, a dummy value
is used for the angle of heel or
the DTC function is switched off.
Under these circumstances the
indicator for a DTC fault shows.
Self-diagnosis has to complete
before fault messages can be is-
sued.
The BMW Motorrad DTC sys-
tem can shut down automatically
under the exceptional riding con-
ditions outlined below.
Exceptional riding
conditions:
Riding for a lengthy period with
the front wheel lifted off the
ground (Wheelie).
Rear wheel rotating with
the vehicle held stationary
by applying the front brake
(Burn Out).
Heating up with the motorcycle
on an auxiliary stand, in neutral
or with a gear engaged.
If the front wheel lifts clear of the
ground under severe accelera-
tion, the DTC 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 skid, with
a corresponding loss of stability.
The BMW Motorrad DTC is un-
able to control a situation of this
nature.
Dynamic Damping
Control
How does DDC work?
with Dynamic Damping Control
OE
(DDC)
Dynamic Damping Control (DDC)
is a semi-active suspension sys-
tem that reacts automatically to
riding manoeuvres and changes
in surface condition, constantly
correcting the damping in ac-
cordance with the situation.
Movement of the rear spring
strut is registered by the ride
height sensor. The electric
damper valve is opened/closed
depending on the determined
direction of travel and speed of
travel as well as on the chosen
ride mode. Front-wheel damping
also depends on the riding mode,
but spring travel is not measured.
7
115
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