Volvo XC90 Owner's Manual page 158

06 Starting and driving
Brake system
Anti-lock braking system (ABS)
The anti-lock braking system
(ABS) prevents the wheels from
locking up during braking.
This means the ability to steer is
maintained and it is easier to swerve to avoid
a hazard for example.
The ABS symbol illuminates for 2 seconds
when the engine is started in connection with
an automatic function check.
After the engine has been started, the ABS
will perform a brief self-test at a speed of
about 20 km/h. This can be felt and heard as
pulses in the brake pedal.
To get the most out of the ABS:
1. Depress the brake pedal with full force.
Pulses will be felt.
06
2. Steer the car in the direction of travel. Do
not release the pressure on the pedal.
Practice braking with the ABS system in a
traffic-free area and in different weather con-
ditions.
156
Electronic brake force distribution
system – EBD
The Electronic Brakeforce Distribution system
(EBD) is an integrated part of the ABS sys-
tem. The EBD system controls the brake
force to the rear wheels so that the best pos-
sible braking force is always available. Pulses
will be heard and felt through the brake pedal
when the system regulates brake force.
WARNING
If the BRAKE and ABS warning symbols
illuminate at the same time, there may be a
fault in the brake system. If the level in the
brake fluid reservoir is normal at this stage,
drive carefully to the nearest workshop
and have the brake system checked - an
authorised Volvo workshop is recom-
mended.
If the brake fluid is under the MIN level in
the brake fluid reservoir, do not drive fur-
ther before topping up the brake fluid.
The reason for the loss of brake fluid must
be investigated.
Emergency Brake Assistance – EBA
(Emergency Brake Assistance) For sudden
braking, full-strength braking is provided
instantaneously. The EBA function senses
when heavy braking is underway by register-
ing how quickly the brake pedal is depressed.
Continue braking without easing off on the
brake pedal. The function is suspended when
the pressure on the brake pedal eases. This
function is always active. It cannot be disen-
gaged.
NOTE
When EBA is activated the brake pedal
lowers slightly more than usual, depress
(hold) the brake pedal as long as neces-
sary. If the brake pedal is released then all
braking ceases.