Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 166

928
Antiblock System
45
l
Speed Sensors
Speed sensors are arranged on all four wheels. These inductive sensors are held in area of
pulse gear rings of front wheel hubs or wheel end shafts on rear axle and produce an
alternating voltage for each pulse tooth. This alternating voltage changes its frequency to
indicate speed, acceleration and deceleration of wheels, and is processed in the control
unit.
1 - Speed
sensor
2 -Wire holder
3
- Speed
sensor wire
4 - Pulse gear
ring
Printed in Germanv - VIII, 1984
Components - A8S
45-05