246
ABS
GENERAL
If this is the first car with ABS you
drive, get familiar with it by some
preliminary “driving tests” on poor
grip roadbeds, obviously under safe-
ty conditions and in compliance with
the traffic regulations of the Country
you are driving in. Read carefully
the following instructions.
The ABS (wheel anti-locking) sys-
tem prevents wheel locking and con-
sequent slipping in all road surface
conditions. This ensures greater con-
trol, as it is possible to steering and
brake at the same time, and reduces
braking space.
If the road conditions decrease the
friction coefficient (i.e. due to the
presence of water, snow, ice, etc.) a
wheel may slip; in this case, the
wheel does not ensure correct decel-
eration or the possibility of main-
taining the running direction and
the ability to steer. Here, the ABSsystem comes into operation, elimi-
nating hydraulic pressure only from
the brake caliper of the locked wheel
and, as soon as the latter start spin-
ning again, brakes it again, thus
ensuring optimum braking and car
driveability.
EBD (ELECTRONIC BRAKE-
FORCE DISTRIBUTOR)
The car is equipped with an elec-
tronic brakeforce distributor (EBD)
which, by means of the ABS control
unit and sensors, makes it possible
to optimally distribute the braking
force between the front and rear
wheels, thus avoiding car skidding
in the most difficult situations.ABS OPERATION
The electronic control unit receives
and processes the signals from the
brake pedal and from the four sen-
sors on the wheels. It consequently
controls the hydraulic system so to
decrease, hold or increase the pres-
sure in the braking circuit of every
single wheel, and prevent locking.
The main components of the ABS
system are:
- an electronic-hydraulic control
unit, which processes the signals
from the various sensors and per-
forms the most appropriate opera-
tions by acting on the solenoid
valves
- four sensors which detect the
rotation speed of every single wheel
- a pump provided with pressure
switch, to restore brake fluid pres-
sure.
IMPORTANTA slight pulsation of
the brake pedal may be felt when
the ABS system comes into play.
324
WINDSCREEN/REAR
WINDOW/HEADLIGHT
WASHER FLUID (fig. 17)
To top up, remove cap Aand filler
B.
Pour in a mixture of water and
TUTELA PROFESSIONAL SC 35
fluid in the following concentrations:
– 30% of the above specified fluid
and 70% water in summer
– 50% of the above specified fluid
and 50% water in winter
– if the temperature falls below –20
°C use TUTELA PROFESSIONAL
SC 35undiluted.Certain commercial
additives for windscreen
washers are inflammable.
The engine compartment con-
tains hot components which may
set it on fire.
Do not travel with the
windscreen washer reser-
voir empty. The wind-
screen washer is fundamental for
improving visibility.
fig. 17
L0A0295b
To prevent damages to
the pump motor, do not
use the windscreen/rear
window/headlight washers when
the reservoir is empty.
The symbol πon the
container indicates syn-
thetic brake fluid, distin-
guishing it from the mineral kind.
Using mineral fluids irreversibly
damages the special braking sys-
tem rubber seals.
Brake fluid is poisonous
and highly corrosive. In
the event of accidental
contact, wash the parts involved
immediately with neutral soap and
water, then rinse thoroughly. Call
the doctor immediately if the fluid
is swallowed.
