Acc Sensor, Adjusting: Notes
Special Tools And Workshop Equipment Required
- ACC Adjuster:VAS6190/2
- Setting Device Basic Set:VAS6430/1
- ACC Reflector Mirror - Audi:VAS6430/3
- Wheel Alignment Computer
Before driving the vehicle onto the alignment stand, make sure there is enough space between the vehicle and the Setting Device Basic Set:VAS6430 . The distance between the Setting Device Basic Set:VAS6433 and the VW emblem must be 120 cm ± 2.5 cm.
If there is not sufficient space, drive the vehicle backward onto the alignment stand in order to be able to use the corresponding space.
The ACC Reflector Mirror from the Setting Device Basic Set:VAS6430 and the ACC Reflector Mirror - Audi:VAS6430/3 must not touch each other during the adjustment.
If the ACC Reflector Mirror - Audi:VAS6430/3 is repositioned on the calibration beam during the adjustment, the Setting Device Basic Set:VAS6430/1 setting must always be checked (for example bubble levels, individual toe settings at the calibration beam, etc.).
- Before beginning the adjustment, check the DTC memory and correct any malfunctions present.
The adjustment procedure is described here using the Setting Device Basic Set:VAS6430/1 .
Follow the Sequence for Adjusting:
- Establish a distance of 120 cm ± 2.5 cm between the centrally positioned ACC Reflector Mirror - Audi:VAS6430/3 and the VW emblem in the radiator grille,
- Install the ACC Reflector Mirror - Audi:VAS6430/3 on the right next to the vertical slits (viewed in the direction of travel),
- Adjust the Distance Regulation Control Module -J428- "master" ,
- Move the ACC Reflector Mirror - Audi:VAS6430/3 to the opposite side of the calibration beam,
- Check the position of the bubble levels and the calibration beam and correct if necessary,
- Adjust the Distance Regulation Control Module 2 -J850- "Slave" .
If there was a previous axle alignment, the steps under "Calibration procedure without a previous axle alignment" should not performed.
Calibration Procedure Without a Previous Axle Alignment
-- Select the ACC calibration with dual radar button on the wheel alignment computer.
-- Follow the test requirements for an axle alignment. Refer to TEST REQUIREMENTS .
Vehicles with Air Suspension
-- Set the vehicle to the standard height.
-- Activate vehicle lift mode. Refer to VEHICLE LIFT MODE .
Continuation for All Vehicles
-- Drive the vehicle onto the vehicle alignment platform.
-- Connect the battery charger. Refer to BATTERY .
-- Connect the Vehicle Diagnostic Tester to the vehicle. (Guide the diagnostic cable through the open window.)
During the adjustment procedure, make sure all the vehicle doors remain closed and the vehicle exterior lighting is switched off.
-- Position the front wheels so they are straight.
-- Mount the quick clamps to the rear wheels.
-- Mount the measurement sensor to the rear wheels.
-- Perform a wheel run-out compensation and the rear wheels.
Calibration Procedure with or without a Previous Axle Alignment
-- Remove the right and left fog lamp trims -1- . Refer to appropriate service information. .
-- Remove any dirt that may be on the sensor lens.
-- Position the Setting Device Basic Set:VAS6430/1 at a distance -a- from the centrally positioned ACC Reflector Mirror - Audi:VAS6430/3 to the VW emblem in the radiator grille.
a - 120 cm ± 2.5 cm
The Setting Device Basic Set:VAS6430/1 must not be moved on the calibration beam.
Procedure for All
-- Mount the front wheel measuring sensors -1- onto the Setting Device Basic Set:VAS6430/1 .
-- Remove the centrally positioned mirror and install it all the way on the right next to the vertical slits.
-- In area -A- , bring item -2- on the rotary knob into alignment with the marking on the mirror (number 2 on the rotary knob must face the vehicle).
-- Level the bubble levels -A and B- on the Setting Device Basic Set:VAS6430/1 using the adjusting screws -1, 2 and 3- .
-- Adjust the mirror -4- via the crank -arrow- so that the laser beam is in the center of the sensor lens.
-- Position the mirror -4- on the side of the calibration beam so that the laser beam is in the center of the sensor lens.
-- Set the same individual toe settings of the front axle via the precision adjustment bolt -5- .
- The difference between individual toe values must be less than 6' or they must be the same.
-- Level the bubble levels -2- of the measurement sensor -1- .
-- Using the laser beam -3- on the ACC Reflector Mirror - Audi:VAS6430/3 , check whether the laser beam is in the center of the sensor lens.
If the laser beam still meets the sensor lens at this step after adjusting the same individual toe values, the Setting Device Basic Set:VAS6430/1 is aligned correctly (positioned).
If the laser beam does not meet the sensor lens, the Setting Device Basic Set:VAS6430/1 must be aligned again.
-- Press the Go to button on the Vehicle Diagnostic Tester and select the "function/component selection" function.
Selection on the Vehicle Diagnostic Tester for the Adjustment of the Distance Regulation Control Module -J428- "Master" :
-- Press the following buttons one after another on the screen:
- Chassis (Repair group 01; 40 - 49)
- Adaptive cruise control
- Master
- 01 - OBD-capable system
- 13 - Distance regulation l J428
- 13 - Distance control, functions
- 13 - Calibrating the distance regulation control module J428
Follow the instructions on the screen to perform the adjustment.