Porsche 911 Carrera - Manual (Page 77)

ABS Brake System
(Antilock Brake System)
The ABS system represents a major contribution to
the enhancement of active safety in your vehicle.
This system prevents the wheels from locking in a
panic stop on almost all road surfaces.
With the ABS system in your vehicle, the
following areas are enhanced:
Steering, vehicle remains steerable under all
braking forces when ABS is engaged.
Good directional control, no swerving caused by
locking of wheels under braking conditions.
Shorter stopping distance, stopping distances
are usually reduced because controlled braking is
maximized.
Prevention of wheel lock up, no brake- induced
sliding and thus no localized tire wear from
emergency braking.
The crucial advantage of the ABS system over
a conventional brake system is in the area of
maintaining directional control and maneuverability
of the car in emergency situations.
Warning!
The increased control that is provided should
not induce you to take greater risks with
your safety. The limits dictated by the laws of
physics cannot be overcome, even with ABS.
The risk of accidents due to inappropriate
speed cannot be reduced, even by the ABS.
The driver bears the responsibility for all
driving maneuvers.
Adapt your driving style to the prevailing road
and weather conditions.
Obey all traffic laws.
Warning!
Other vehicles not equipped with the ABS
system may not be able to maintain control,
especially on wet or poor road surfaces and
thus may be more likely to impact you from
behind.
To minimize that risk, use your ABS system
to increase your ability to maneuver to avoid
dangerous situations and not merely to try to
stop in the shortest distance possible.
Operation of the ABS system
A wheel speed sensor is mounted to each of the
four wheels. If wheel lock-up of either of the front
wheels or the rear wheels is sensed during braking,
the brake pressure is adjusted automatically until
the wheel no longer slips.
If braking forces approach the wheel lock-up point
for all wheels (panic braking) the ABS system will
intervene to provide a rapid rythmic braking. The
proper operation of ABS is perceived by the driver
as a pulsating brake pedal in conjunction with
audible noise and perhaps some vibration.
If you experience these sensations while
driving or a road surface with questionable
traction, reduce vehicle speed appropriate for
the prevailing road conditions.
If full braking should be necessary, press the
brake pedal all the way down throughout the
entire braking procedure, regardless of the
pulsating pedal. Do not ease up on pressure
applied to the pedal.
The functional readiness of all the main electrical
components of the ABS is checked by an electronic
monitoring system both before and while you drive.
Warning light USA
Warning light Canada
When the ignition is switched on the ABS warning
light will light up while the system is electronically
Controls, Instruments
75