Get Electrical System -> Adaptive Cruise Control Guide for Volkswagen Phaeton 4 Door First Generation (2002-2016)

Electrical System

Adaptive Cruise Control

(Late Availability)

Adaptive Cruise Control (ACC) is a driver

assistance system that enhances cruise

control operation.

By reducing engine speed and applying

the brakes if necessary, an ACC-equipped

vehicle is kept at a reasonable distance

behind a slower-moving vehicle in front of it.

For more detailed information,

please refer to The Phaeton

Adaptive Cruise Control,

Self-Study Program

Course Number 898303.

ACC Operation

How ACC works is shown in the following

four traffic scenarios.

Steady speed

There are no vehicles driving ahead within

the distance regulator sensor detection

area. The cruise control speed set by the

driver is maintained.

62 m ph

(100 km / h)

SSP270/197

Delay

When the ACC-equipped vehicle

50 m ph

approaches a slower-moving vehicle,

vehicle speed is reduced by reducing the

engine speed and, if necessary, through a

moderate application of the brakes.

The driver is prompted to take over the

braking operation if the gap between

vehicles is insufficient.

(80 km / h)

62 m ph

(100 km / h)

Ł 50 m ph

(80 km / h)

SSP270/198

58

Electrical System

Effects

The ACC-equipped vehicle adapts

its speed to the speed of the vehicle

in front of it.

50 m ph

(80 km / h)

50 m ph

(80 km / h)

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Acceleration

The ACC-equipped vehicle accelerates to

the desired speed once the vehicle in front

of it leaves the traffic lane or otherwise

moves out of the detection area.

50 m ph

(80 km / h)

Operating Conditions

ACC system status is affected by the left

bank of buttons on the multi-function

steering wheel, the accelerator, the brake

pedal, the selector lever, by the

50 m ph

(80 km / h)

Ł 62 m ph

(100 km / h)

engagement of the vehicle brakes.

The ACC system is always off when the

engine is started. The ON/OFF button

must be used to switch the system to

standby status.

SSP270/200

59

Electrical System

Conditions for turning on the ACC

The ACC system can be turned on at

vehicle speeds between 19 and 112 mph

(30 and 180 km/h).

The control buttons have the

following functions:

• The SET button adopts the current speed

as the desired speed. Repeated pressing

reduces the desired speed by 0.6 mph

(1 km/h) each time.

ACC

• The RES (RESume) button adopts the

previous desired speed. Repeated

pressing increases the desired speed by

0.6 mph (1 km/h) each time.

ACC

• The ACC + button or the ACC – button

increases or reduces the desired speed

in increments of 6 mph (10 km/h).

Conditions for turning off the ACC

• ON/OFF button, desired cruise control

speed is lost.

• CANCEL button, desired cruise control

speed is maintained.

• Pressing the brake pedal.

• Excessive application of the accelerator.

• Selector lever in P, R, N.

SSP270/201

• Vehicle speed outside of the range of

19 to 112 mph (30 to 180 km/h).

• Application of ESP, ASR, MSR, ABS.

60

Electrical System

Control Module for

Distance Regulation J428

with Right Distance

Regulation Sensor G259

Sensor

Electronics

New ACC com ponents

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

Lens

• Speed measuring range: ± 112 mph

Millimeter-Wave

Generator

(180 km/h)

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Brake Booster

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.

Brake Booster

Control Module

J539

The electronics associated with the brake

booster are accommodated in the Brake

Booster Control Module J539.

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61

Electrical System -> Adaptive Cruise Control for Your Volkswagen Phaeton 4 Door First Generation (2002-2016)

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