BMW HP4 Rider's Manual page 123

sequently, there can be a per-
ceptible reduction in acceleration
out of very tight bends.
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 can
switch off automatically under
the exceptional riding conditions
outlined below.
Exceptional riding
conditions:
Riding for a lengthy period with
the front wheel lifted off the
ground (wheelie) with DTC de-
activated.
Rear wheel rotating with the
vehicle held stationary by ap-
plying the front brake (burn-
out).
Heating up with the motorcycle
on an auxiliary stand, in neutral
or with a gear engaged.
If the coding plug for the SLICK
mode is not inserted, you can
reactivate DTC by switching the
ignition off and then on again and
accelerating to a speed in excess
of 5 km/h.
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.
In the RACE and SLICK riding
modes, wheelies at slight bank
angles are possible.
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.
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