Abs Brake System (Anti-Lock Brake System) - Porsche Cayman Owner's Manual

ABS Brake System
(Anti-Lock Brake System)
Loss of control over
h
WARNING
the vehicle
In spite of the advantages of ABS, it is still the
driver's responsibility to adapt his driving style
and maneuvers in line with road and weather
conditions, as well as the traffic situation.
The increased safety that is provided should not
induce you to take greater risks with your safety.
The limits set by the physics of driving cannot be
overcome, even with ABS.
Risk of accidents due to inappropriate speed
cannot be reduced by ABS.
ABS ensures
– Full steering control
Vehicle remains steerable
– Good driving stability
No skidding due to locked wheels
– Optimum braking distance
Shorter stopping distance in most cases
– Prevention of wheel locking
No flat spots on the tires
168
Driving and Driving Safety
Function
The decisive advantage of ABS lies in the driving
stability and manoeuvrability of the vehicle in
hazardous situations.
ABS prevents locking of the wheels during full
braking, on almost all road surfaces, until just
before the vehicle stops.
ABS begins to control the braking process as
soon as a wheel shows a tendency to lock.
This controlled braking process is comparable
with extremely rapid cadence braking.
The pulsating brake pedal and a "juddering noise"
warn the driver to adapt his driving speed to the
road conditions.
f
If full braking is necessary, press the brake
pedal fully during the whole braking operation,
even though the pedal is pulsating. Do not
reduce brake pressure.
Warning light USA
Warning light Canada
If the ABS warning light lights up on the instrument
panel while the engine is running, the ABS has
switched off because of a fault.
The warning message "ABS/PSM failure
Adapted driving permitted" appears on the
multi-function display in the instrument panel.
For information on warning messages on the multi-
function display:
f
Please see the chapter "OVERVIEW OF
WARNING AND INFORMATION MESSAGES"
on page 114.
In this case, the braking system will operate
without lock prevention, as in vehicles without
ABS.
f
Adapt your driving style to the changed
braking behavior.
The ABS must be checked by your Porsche
dealer in order to prevent the occurrence of
further faults with unpredictable
consequences.
Please contact a qualified specialist workshop.
We recommend that you get an authorized
Porsche dealer to do this work as they have
trained workshop personnel and the necessary
parts and tools.
The ABS control unit is adjusted for the approved
tire dimensions.
The use of tires with non-approved dimensions can
lead to different wheel speeds, causing ABS to
switch off.