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926
Antiblock System
45
General
As of MY '84, the Porsche 928 S is optionally available with anti-lock system (Af3S) (option M593).
As of model year 1986, the 928 S is fitted with ASS as standard equipment worldwide
The anti-lock braking system represents an important contribution
lo the enchancement
of active
safety in the vehicle.
The system prevents the wheels from locking when the brakes are applied,
thus assuring full steera-
bifiiy and directional
stability.
Furthermore, the braking distance Is optimized under all road cot-+
ditlons.
However, it is still the responsibility
of the driver to adapt his driving to road and weather conditions
and to the prevailing traffic situation,
The decisive advantage offered by ABS lies in the stability and maneuverability
of the vehicle in mo-
ments of danger -when the brakes are fully applied, even in a curve.
It is not possible to retrofit ABS in cars built before model year 84, as the body has undergone
a
number of changes since then,
Modifications,
86 models onward
As of model year 1986, the 928 S is fitted with ABS as standard equipment worldwide.
At the same
time, the following
modifications
were incorporated.
Optimization
of plug-in connectors
of speed sensors to cable. The cable routing has also been modi-
fied.
Number of teeth on impulse ring reduced from 90 to 45 (improved signal registration)
ABS control unit changed (adaption to impulse ring with 45 teeth).
When replacing, ensure that
the correct control unit Is used. The only outward differences of the control units are the Part
No. and Bosch part no., respectively.
Observe correct usage references act. to the spare
parts catalog.
Modlflcatlons
as of MY '90
Starting with MY '90, the 928 is fitted with a PSD (electronically
controlled
Porsche limited slip dif-
ferential).
For details, refer to page 45 - 08.
l
General
45
- 01
Printed
in Germany
- XXIX, 1992
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