Adaptive Cruise Control (Acc), Calibrating, Static Calibration

Before calibrating the adaptive cruise control (ACC), check the sensor, holders and retainers for damage, external interference and secure fit. Repair any damaged components if necessary.

Before calibrating the adaptive cruise control (ACC), check the DTC memory and process or delete potential entries.

The ACC control module "adjustment angle measured value" shows whether the sensor is misaligned.

The ACC calibration may only be performed using VW/Audi-approved alignment testers and adjusting devices.

Proper ACC operation requires correct calibration.

If one of the following conditions is met, then the Control Module for Adaptive Cruise Control -J428- must be calibrated:

The Control Module for Adaptive Cruise Control -J428- was removed and installed or replaced.
Lock carrier service position was performed.
The windshield was removed and installed or replaced.
Rear axle toe was adjusted.
Changes to the vehicle suspension which changed the height were performed.

Special tools and workshop equipment required

Setting Device - Basic Set :VAS 6430/1 or Setting Device - Basic Set :VAS 6430/1A

Fig 1: Identifying Setting Device VAS 6430
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ACC Reflector Mirror :VAS 6430/10
Wheel Alignment Computer

CAUTION:

Before the vehicle is driven onto the wheel alignment platform, check if there is sufficient floor space in between the vehicle and the Setting Device Basic Set :VAS 6430 . The distance in between the Setting Device Basic Set :VAS 6430 and the sensor must be 120 cm ± 2.5 cm.
If the available floor space is not sufficient, drive the vehicle onto the wheel alignment platform backward and then use the corresponding floor space.
If the ACC Reflector Mirror :VAS 6430/10 is repositioned on the calibration beam during the adjustment, the Setting Device - Basic Set :VAS 6430/1A setting must always be checked (for example, bubble levels, individual toe settings at the calibration beam, etc.).

Before starting the calibration, check the DTC memory and work or erase all potentially displayed entries.

The calibration procedure is described with the Setting Device Basic Set :VAS 6430 .

Maintain the following calibration sequence:

Ensure a distance of 120 cm ± 2.5 cm in between the centrally placed ACC Reflector Mirror :VAS 6430/10 and the air grille sensor.
Install the ACC Reflector Mirror :VAS 6430/10 centered onto the calibration beam.
Calibrate the Control Module for Adaptive Cruise Control -J428-

If there was previous axle alignment, the steps under "Procedure without a prior axle alignment" do not have to be performed.

Calibration procedure without previous axle alignment

-- Select the ACC calibration button on the wheel alignment computer.

-- Pay attention to the test requirements for the axle alignment. Refer to TEST REQUIREMENTS .

-- Drive the vehicle onto the vehicle alignment platform.

-- Connect the battery charger. Refer to Battery, Charging .

-- Connect the Vehicle Diagnostic Tester . (Guide the diagnostic cable through the open window.)

CAUTION:

During the calibration procedure pay attention that all vehicle doors remain closed and the vehicle exterior lamps are off.

-- Move the wheels so that they are straight.

-- Install the quick-action clamps on the rear wheels.

-- Install the measurement sensor on the rear wheels.

-- Perform a wheel run-out compensation on the rear wheels.

Calibration procedure with or without previous axle alignment.

-- Position the Setting Device - Basic Set :VAS 6430/1A at a distance -a- from the centrally positioned ACC Reflector Mirror :VAS 6430/10 to the brand emblem in the radiator grille.

Fig 2: Identifying Special Tool Required And Placement

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a - 120 cm ± 2.5 cm

-- Remove any contamination at the brand emblem.

CAUTION:

The Setting Device Basic Set :VAS 6430/1 must not be moved on the calibration beam.

-- Position the front wheel measuring sensors -1- on the calibration beam.

Fig 3: Front Wheel Measuring Sensors

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-- Level the bubble levels -A- and -B- on the Setting Device Basic Set :VAS 6430/10 using the adjusting screws -1-, -2- and -3-.

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-- Adjust the mirror -5- with the crank -arrow- so that the laser beam strikes the sensor lens in the center.

-- Adjust the mirror on the side of the calibration beam so that the laser beam is in the center of the brand emblem -1-.

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-- Level out the sensor bubble levels.

-- Turn the fine adjustment screw -4- until the display on the wheel alignment computer is within the tolerance range.

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-- Level out the sensor bubble levels.

-- Use the laser beam at the Setting Device Basic Set :VAS 6430/10 to check if the bubble levels are level and the that the laser beam strikes the sensor lens in the center.

CAUTION:

If the laser beam does not strike the sensor lens, then readjust the Setting Device Basic Set :VAS 6430/10 .

-- Select "Individual test plan" on the Vehicle Diagnostic Tester .

-- Press the following function areas in succession:

Diagnostic-capable systems
0013 - Distance Control
0013 - Distance Control, Functions
0013 - Calibrate

-- Switch the ignition off.

-- Disconnect the Vehicle Diagnostic Tester from the diagnostic connection.

-- Disconnect the battery charger. Refer to Battery, Charging .