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ABS Brake System<br />
(Anti-Lock Brake System)<br />
Warning!<br />
In spite of the advantages of ABS, it is still the<br />
driver’s responsibility to adapt his driving style and<br />
maneuvers in line with road and weather<br />
conditions, as well as the traffic situation.<br />
The increased safety that is provided should not<br />
induce you to take greater risks with your safety.<br />
The limits set by the physics of driving cannot be<br />
overcome, even with ABS.<br />
Risk of accidents due to inappropriate speed<br />
cannot be reduced by ABS.<br />
ABS ensures<br />
– Full steering control<br />
The vehicle remains steerable<br />
– Good driving stability<br />
No skidding due to locked wheels<br />
– Optimum braking distance<br />
Shorter stopping distance in most cases<br />
– Prevention of wheel locking<br />
No flat spots on the tires<br />
Function<br />
The decisive advantage of ABS lies in the driving<br />
stability and maneuverability of the vehicle in<br />
hazardous situations.<br />
ABS prevents locking of the wheels during full<br />
braking, on almost all road surfaces, until just<br />
before the vehicle stops.<br />
ABS begins to control the braking process as<br />
soon as a wheel shows a tendency to lock.<br />
This controlled braking process is comparable<br />
with extremely rapid cadence braking.<br />
The pulsating brake pedal and a “juddering noise”<br />
warn the driver to adapt his driving speed to the<br />
road conditions.<br />
f If full braking is necessary, press the brake<br />
pedal fully during the whole braking operation,<br />
even though the pedal is pulsating. Do not<br />
reduce brake pressure.<br />
Warning light USA<br />
Warning light Canada<br />
If the ABS warning light lights up on the instrument<br />
panel while the engine is running, the ABS has<br />
switched off because of a fault.<br />
The warning message “ABS failure” appears on<br />
the multi-function display in the instrument panel.<br />
For information on warning messages on the<br />
multi-function display:<br />
f Please see the chapter “OVERVIEW OF<br />
WARNING MESSAGES” on page 152.<br />
In this case, the brake system will operate without<br />
lock prevention, as on vehicles without ABS.<br />
f Adapt your driving style to the changed<br />
braking behavior.<br />
The ABS must be checked by your authorized<br />
Porsche dealer in order to prevent the<br />
occurrence of further faults with unpredictable<br />
consequences.<br />
Please contact a qualified specialist workshop.<br />
We recommend that you have an authorized<br />
Porsche dealer to do this work as they have<br />
trained workshop personnel and the necessary<br />
parts and tools.<br />
The ABS control unit is adjusted for the approved<br />
tire dimensions.<br />
The use of tires with non-approved dimensions can<br />
lead to different wheel speeds, causing ABS to<br />
switch off.<br />
Driving and Driving Safety 207