1997-2007 Volvo Xc70 SUV Safety -> Brake system User Manual
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Safety -> Brake system for Your Volvo Xc70 SUV First Generation (1997-2007)

21
Brake system/ABS/EBD
If a brake circuit fails
If a fault should occur in one of the
circuits it is still possible to stop the
car. Press the pedal hard once - not repeatedly.
The brake pedal can be depressed further and
feels a little softer than usual. If also requires
more pressure on the pedal to achieve a normal
braking effect.
The brake servo only works when the
engine is running
If the car is rolling or being towed with the
engine switched off you must apply approxima-
tely five times more pressure on the brake pedal
than when the engine is running.
The brake pedal feels rigid and hard.
Moisture on the brake discs and brake
lining alter braking characteristics!
The brake components become wet when the
car is driven in heavy rain, through pools of
water, or when the car is washed. This alters
brake pad friction characteristics so that there is
a delay before braking effect is noticed.
Depress the brake pedal lightly from time to
time when driving long distances in rain or
slush or before parking the car in such condi-
tions. The brake pads are thus able to warm up
and dry out. You should also do this when
driving after washing the car or when starting
in very damp or cold weather conditions.
If the brakes are heavily loaded
When driving in the Alps or other roads with
similar characteristics, the brakes are heavily
loaded even if you are not pressing the pedal
particularly hard. Because the speed is often
low the brakes are not cooled as effectively as
when driving on flat roads.
So as not to overload the brakes shift down
and use the same gear both uphill and downhill
instead of using the brake (manual transmis-
sion). In this way engine braking is used more
effectively and the brake is only required for
short periods.
Keep in mind that the brakes are even more
heavily loaded when driving with a trailer.
ABS - Anti-lock brakes
The ABS system (Anti-lock Braking
System) is designed so that the wheels do not
lock when braking. This retains the best
possible steering response when braking. This
improves your ability to swerve to avoid
obstacles. The ABS system does not increase
your total braking capacity. However, as the
driver you have increased ability to steer and
thus better control over the car, which in turn
increases safety.
After the engine has started and reached a speed
of about 20 km/h (12 mph), a short self-test can
be both heard and felt. When the ABS system
functions, you can hear and feel pulses in the
brake pedal. This is completely normal.
NOTE! You must depress the brake pedal fully
to take maximum advantage of the ABS system.
Do not release the pedal when the ABS pulses
are felt and heard. Practice braking with the
ABS system in a suitable place.
The ABS symbol shines with a steady light:
· For approximately two seconds when you
start the car to test the system.
· If the ABS system has shut down due to a
fault.
22
Brake system/ABS/EBD
WARNING!
If both the BRAKE and ABS
warning symbols are lit up there is a risk
that the rear end will have a tendency to
slide during heavy braking. If the level in
the brake fluid reservoir is normal, drive
carefully to the nearest authorised Volvo
workshop to have the brake system
checked.
If the level of brake fluid in the reservoir is
below the MIN mark, the car should not be
driven until the brake fluid has been topped
up. The reason for the loss of brake fluid
must be investigated.
Electronic Brakeforce
Distribution (EBD)
The EBD system (Electronic Brakeforce
Distribution) is an integrated part of the ABS
system. The EBD system controls the brake
force to the rear wheels so that the best possible
braking force is always available. Pulses in the
brake pedal can be felt and heard as the system
controls the brake force.
Emergency Brake Assistance (EBA)
The Emergency Brake Assistance (EBA)
function is integrated in the DSTC system and
is designed to provide immediate maximum
brake force whenever rapid braking is necessa-
ry. The system detects the need for heavier
braking by registering how quickly the brake
pedal is depressed.
The EBA function is active at all speeds. For
safety reasons, it cannot be switched off.
When the EBA function is activated, the brake
pedal sinks while maximum braking force is
applied. Continue braking without releasing the
brake pedal. The EBA function disengages
when the pressure on the brake pedal is
released.

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