RADAR SENSOR (Control Module for Adaptive Cruise Control -J428-), ADJUSTING, FROM PRODUCT IMPROVEMENT

Special tools and workshop equipment required 

• Wheel Alignment Computer approved by VW/Audi
• Vehicle Diagnostic Tester
• Wheel Alignment Computer - Camera:VAS701001/1 
• Setting Device - Basic Set:VAS6430/1  or Setting Device - Basic Set:VAS6430/1A 
• ACC Reflector Mirror - Audi:VAS6430/3 
• Screwdriver with T-bar :VAS272001 

There are two choices for calibrating/adjusting:

The "complete alignment"

This procedure should be selected for the following activities if a wheel alignment and calibration/adjustment should be performed.

• The rear axle toe was adjusted.
• The vehicle suspension was changed, for example changing from standard to sport suspension.

The "quick access"

This procedure should be selected for the following activities if only the calibration/adjustment will be performed.

• The Distance Regulation Control Module -J428- was removed and installed or replaced.
• The front bumper was removed and installed or replaced.
• The front bumper was loosened or adjusted.
• There is damage on the front bumper.
• The Drivetrain Control Module -J775- was calibrated or replaced.

TIP:

• Both procedures are programmed in the wheel alignment computer. The respective procedure is performed automatically. It is only necessary to select the appropriate program for the procedure that will be performed.
• If only the wheel sensor should be calibrated/adjusted, then the "quick access" mode must be selected on the wheel alignment computer.
• The procedure in the "quick access" mode is described in the following.

Procedure

As an example, the procedure is described for the Wheel Alignment Computer:VAS701001  .

• Note the test requirements. Refer to TEST REQUIREMENTS .
• Follow the measurement preparations for calibrating/adjusting the driver assistance systems. Refer to MEASUREMENT PREPARATIONS .

-- Check sensors and retainers for damage, external influence and secure fit. Service any damaged components.

-- Check the front bumper cover for damage, cracks and secure fit. Service any damaged components.

-- Vehicle with rear axle steering: drive the vehicle "straight" onto the alignment rack. Switch off the ignition when the vehicle has come to a stop.

-- Steer the rear axle to the zero position. Refer to Rear Axle Steering .

• This is the only way to ensure that the rear axle steering is in the straight-ahead position.

-- Vehicle with air suspension: adjust to standard vehicle height and lock. Refer to Air Suspension .

-- Check the DTC memory for adaptive cruise control (ACC). Fix all displayed entries.

-- Move the wheels so that they are straight.

-- Install quick-action clamps on the wheels.

-- Attach the reflectors to the quick-action clamps.

-- Perform the wheel run-out compensation.

-- Remove the cover for the Control Module for Adaptive Cruise Control -J428-. Refer to OVERVIEW - RADIATOR GRILLE .

-- Remove any dirt that may be on the sensor lens.

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

• The ACC Setting Device must not be moved on the calibration beam.

-- Position the Setting Device Basic Set:VAS6430/1A  at distance -a- from the center of the ACC Reflector Mirror:VAS6430/3  -1- up to the Audi rings.

Courtesy of AUDI

• Dimension -a- = 120 ± 2.5 cm (47.24 ± 0.98 in.)

-- Place the Camera:VAS701001/1  -1- for the ACC adjustment on the Setting Device - Basic Set:VAS6430  on the right side and tighten.

Courtesy of AUDI

-- Move the ACC Reflector Mirror:VAS6430/3  -1- to the left on the vertical slits.

Courtesy of AUDI

-- Adjust the knob on the ACC Reflector Mirror:VAS6430/3  -1- so that the number "2" is facing the line marking -arrows-.

Courtesy of AUDI

-- Adjust the Setting Device - Basic Set:VAS6430  by moving the reflector mirror -2- at the side, so that the laser beam strikes the sensor lens -1-.

Courtesy of AUDI

-- Level the bubble level -A- on the ACC Reflector Mirror:VAS6430/3  -5- using the adjusting screw -1-.

Courtesy of AUDI

-- Level the bubble level -B- using the adjusting screw -2-.

-- Adjust the height of the reflector mirror with the crank -arrow-, so that the laser beam is in the vertical center of the sensor lens.

-- If necessary, reposition the reflector mirror at the side on the calibration beam until the laser beam is in the horizontal center of the sensor lens.

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

-- Using the laser beam on the reflector mirror, check again if the laser beam contacts the center of the sensor lens. If necessary align the reflector mirror again.

-- Turn on the Vehicle Diagnostic Tester.

-- Switch the ignition on.

-- Select and start the Diagnostic  operating mode.

-- Select the Test plan  tab.

-- Select the Select individual test  button and select the following tree structure consecutively:

• Body
• Electrical system
• 01 - OBD-capable systems
• 13 - Distance Control I J428
• 13/8B - Control Module for Adaptive Cruise Control, Functions
• 13/8B - Adjustment

-- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.

-- The fine adjustment of the Control Module for Adaptive Cruise Control -J428- is done using the screws -1- and -2- with the Screwdriver with T-bar:VAS272001  .

Courtesy of AUDI

-- Switch the ignition off.

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

-- Disconnect the battery charger. Refer to BATTERY, CHARGING .

-- Install the cover for the Control Module for Adaptive Cruise Control -J428-. Refer to OVERVIEW - RADIATOR GRILLE .