Abs Wheel Speed Sensor; Earth Magnetic Field Sensor; Gps Sensor - Volkswagen Passat ‘97 User Manual

Base of aerial
However, this particular navigation system is not yet able to make allowance
for traffic lights, one-way roads, building sites, traffic jams, etc.

ABS wheel speed sensor

The wheel speed sensors of the rear suspension
are used to provide the navigation computer
with iinfomation on distance travelled.
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Earth magnetic field sensor
The earth magnetic field sensor determines
the direction of travel relative to the north pole
for the navigation computer.
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GPS sensor

GPS stands for Global Positioning System, a
global navigation system.
The sensor is integrated in the roof aerial.
The navigation computer uses the data
supplied by the GPS sensor as a correction
factor or when relocating the vehicle if the
computer loses track of the current position
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(e.g. during rail transport).
Connector
GPS sensor
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