BMW On-Board Computer Service Manual download pdf (Page 97)

Rear wheel lift

Under very severe and sudden

deceleration, however, under cer-

tain circumstances it is possible

that the BMW Motorrad Integ-

ral ABS will be unable to prevent

the rear wheel from lifting clear

of the ground. If this happens

the outcome can be a highsiding

situation in which the motorcycle

can flip over.

Severe braking can cause

the rear wheel to lift off the

ground.

When you brake, bear in mind

that ABS control cannot always

be relied on to prevent the rear

wheel from lifting clear of the

ground.

What is the design

baseline for

BMW Motorrad Integral

ABS?

Within the limits imposed by

physics, the BMW Motorrad In-

tegral ABS ensures directional

stability on any surface. The sys-

tem is not optimised for special

requirements that apply under

extreme competitive situations

off-road or on the track. The

driving behaviour should be ad-

apted to actual driving skills and

the road conditions.

Special situations

The speeds of the front and rear

wheels are compared as one

means of detecting a wheel's

incipient tendency to lock. If

the system registers implaus-

ible values for a lengthy period

the ABS function is deactivated

for safety reasons and an ABS

fault message is issued. Self-dia-

gnosis has to complete before

fault messages can be issued.

In addition to problems with the

BMW Motorrad Integral ABS,

exceptional riding conditions can

lead to a fault message being

issued.

Exceptional riding

conditions:

Heating up with the motorcycle

on the centre stand or an auxil-

iary stand, engine idling or with

a gear engaged.

Rear wheel locked by the en-

gine brake for a lengthy period,

for example while descending

on a loose or slippery surface.

If a fault message is issued on

account of exceptional riding

conditions as outlined above, you

can reactivate the ABS function

by switching the ignition off and

on again.

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Engineering details

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