Volkswagen Phaeton 2003 Manual page 65

New ACC components
The ACC function is made possible by
the use of a Control Module for Distance
Regulation J428 with a Right Distance
Regulation Sensor G259 that employs
the radar principle and the active ABS
system electronic Brake Booster Control
Module J539.
Important data regarding the Right Distance
Regulation Sensor G259 include:
• Transmit frequency: 76.5 GHz
• Visual range: 492 feet (150 m)
• Horizontal viewing angle: 12 degrees
• Vertical viewing angle: 4 degrees
• Speed measuring range: ± 112 mph
(180 km/h)
The electronic brake booster is a
well-known tandem amplifier in which
an integrated electromagnet (Magnetic Coil
for Brake Pressure in Brake Booster N247)
controls the pressure distribution in such a
manner that approximately 30% of the
braking force can be activated electrically.
The necessary braking convenience is
ensured by a brake pressure control with a
separate sender for brake pressure and a
membrane position control with a separate
membrane position sender.
The electronics associated with the brake
booster are accommodated in the Brake
Booster Control Module J539.
Electrical System
Control Module for
Distance Regulation J428
with Right Distance
Regulation Sensor G259
Millimeter-Wave
Generator
Brake Booster
Control Module
J539
Sensor
Electronics
Lens
SSP270/195
Brake Booster
SSP270/196
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