2002 BMW MOTORRAD R 1150 GS Rider's Manual (in English)

3
79
Starting – Riding – Parking
Brake system - general
Oil and grease on brakes
d Warning:
Brake discs and pads must be
free from oil or grease.
Dirt or mud on brakesWhen riding on loose surfaces
or muddy roads, the brakes
may fail to take effect immedi-
ately because of dirt or mois-
ture on the discs or brake pads.
d Warning:
The brakes must first be
applied until the discs and
pads are clean.
Dirt on the brakes increases
the rate of pad wear.
d Warning:
If the brake lever can be moved
right to the limit of its travel, this
indicates a mechanical or hy-
draulic fault. The brake system is
defective.
Immediately consult a specialist
workshop, preferably an author-
ised BMW motorcycle dealer.
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3
80
Starting – Riding – Parking
Brake system - with BMW Integral ABSOE
Sensitive electronic
control
It takes skill and sensitive con-
trol of the brakes to pull up
safely on a motorcycle. If the
front wheel brake locks and the
wheel skids, the necessary lon-
gitudinal and lateral stabilising
forces are lost, and a fall can
result.
For this reason, the rider sel-
dom makes full use of available
braking performance in an
emergency.
OEOptional extra
BMW Integral ABS is the latest-
generation BMW ABS develop-
ment: by preventing both
wheels from locking and opti-
mising braking-force distribu-
tion by means of the integral
function, it offers much
improved braking performance
(
b 82). Full use is made of tech-
nical braking capacity to mini-
mise braking distances, even
when road conditions are poor.
When the motorcycle is ridden
in a straight line, the BMW Inte-
gral ABS is able to handle
emergency braking safely.
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81
Starting – Riding – Parking
Brake system - with BMW Integral ABSOE
Safety marginBut remember: the potentially
shorter braking distances
which BMW Integral ABS per-
mits must not be used as an
excuse for careless riding.
ABS
is primarily a means of ensuring
a safety margin in genuine
emergencies.
– You have to familiarise your-
self with the new, electroni-
cally assisted braking. Try the
brakes several times when
you take your motorcycle out
for the first time. Find out for
yourself how the brakes feel
– Never ride without due care
and attention, or assume that
good fortune will protect you
from your own foolhardiness
– Keep within the permitted
speed limits – Take care when cornering.
When you apply the brakes on
a corner, the motorcycle's
weight and momentum take
over and even BMW Integral
ABS is unable to counteract
their effects.
OEOptional extra
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3
82
Starting – Riding – Parking
Brake system - with BMW Integral ABSOE
Partially integral brakesThe integral brake function
interlinks the front and rear
brakes, so both wheels are
braked when you operate the
brake lever.
The electronic controller in the
BMW Integral ABS computes
the braking-force distribution
between front and rear wheels,
and applies the brakes
accordingly.
Braking-force distribution
depends on load and is recal-
culated every time the ABS
controller comes into action.
In this partially integral brake
configuration, the integral brak-
ing function is activated only
when you pull the handbrake
lever. The footbrake lever acts
only on the rear brake.
Brake servoThe hydraulic pump in the BMW
Integral ABS actively boosts the
braking force acting on the
wheel when the brakes are
applied.
By boosting the braking force in
this way, the BMW Integral ABS
achieves higher braking effi-
ciency than standard brake
systems.
ABS
anti-lock brake system
ABS prevents the wheels lock-
ing under heavy braking, thus
contributing significantly to
road safety.
OEOptional extra
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3
83
Starting – Riding – Parking
Brake system - with BMW Integral ABSOE
RESIDUAL BRAKING
FUNCTION
If the BMW Integral ABS develops
a fault, a RESIDUAL BRAKING
FUNCTION only is available in the
brake circuits in question.
The RESIDUAL BRAKING FUNC-
TION is the braking efficiency
without the hydraulic servo assist-
ance of the BMW Integral ABS.
Under these circumstances,
therefore, you must apply CON-
SIDERABLY higher pressure to
the brake levers in question in
order to apply the brakes, and
lever travel is longer.
When the RESIDUAL BRAKING
FUNCTION is active, the ABS
function is unavailable in the
brake system in question.
When the RESIDUAL BRAKING
FUNCTION is active, the integral
braking function is partially or
entirely unavailable.
d Warning:
When the RESIDUAL BRAKING
FUNCTION is active, maintain a
defensive riding style and pro-
ceed immediately to the nearest
specialist workshop, preferably
an authorised
BMW motorcycle dealer.
L Note:
When the RESIDUAL BRAKING
FUNCTION is active, it is advis-
able to set adjuster A
(
b 35) on the front-brake lever
to position 4.
The RESIDUAL BRAKING
FUNCTION is active under the
following circumstances:
– Ignition off
– Before and during self-diag- nosis (
b 84)
– Fault in the BMW Integral ABS
(
b 88)
L Note:
When the RESIDUAL BRAKING
FUNCTION is active for both
brake circuits, the noise of the
pump is no longer audible when
you operate the brake levers.
OEOptional extra
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84
Starting – Riding – Parking
21*
Self-diagnosis with pull-
away test
The BMW Integral ABS per-
forms self-diagnosis and a pull-
away test to ensure its
operability.
Self-diagnosis is performed
automatically when you switch
on the ignition.
d Warning:
Self-diagnosis is not per-
formed unless both brake le-
vers are in their fully released
positions.
Only the RESIDUAL BRAKING
FUNCTION is available until
self-diagnosis is completed
(b 83) .  Release the brake levers, if
necessary
 Switch on the ignition
Initially:
– ABS warning light 1:
flashes at 4 Hz
– General warning light 2:
ON
bSelf-diagnosis is in
progress
Then:
– ABS warning light 1:
flashes at 1 Hz
– General warning light 2:
OFF
bSelf-diagnosis successfully
completed
OEOptional extra
*
n depending on national-market
specification
Brake system - with BMW Integral ABSOE
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3
85
Starting – Riding – Parking
1*
Start the engine.
 Move off
– ABS warning light1:
OFF (as of approx. 5 km/h
(3 mph) road speed)
bPull-away test successfully
completed
bBMW Integral ABS
is available
L Note:
Flashing at 1 Hz = 1 flash per
second (slow flashing)
Flashing at 4 Hz = 4 flashes per
second (fast flashing)
OEOptional extra
L Note:
Starting on gradients:
Always switch on the ignition
with gear engaged, clutch lever
released and both brake levers
released.
Self-diagnosis cannot be per-
formed if you do not follow this
procedure.
When self-diagnosis com-
pletes, apply the brakes, disen-
gage the clutch, and start the
engine.
*n depending on national-market
specification
Brake system - with BMW Integral ABSOE
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86
Starting – Riding – Parking
Brake system - with BMW Integral ABSOE
Off-road deactivationIn contrast to road riding, where
BMW Integral ABS can always
prevent wheel locking and the
resulting accident, it may be
desirable for the rider to be able
to lock a wheel or prevent it
from rotating on rough terrain or
loose surfaces. This is the rea-
son why the BMW Integral ABS
enables you to deactivate the
ABS function temporarily.
OEOptional extra
Deactivating the ABS
d Warning:
Never switch the ignition off
or on unless the motorcycle is
at a standstill.
Brake boost and the integral
function remain operational,
even if the ABS function is de-
activated.
L Note:
The ABS function is reactivated
once the self-diagnosis routine
has completed successfully af-
ter you switch off the ignition
and switch it on again with the
motorcycle at a standstill.
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