5.2 ACC Sensor, Adjusting
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 3.2 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 Electrical Equipment General Information (Battery, Charging).
- Connect the Vehicle Diagnostic Tester to the vehicle. (Guide the diagnostic cable through the open window.)
- 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 Body Exterior.
- 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
NOTE: 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.NOTE:
- 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 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:
Follow the instructions on the screen to perform the adjustment.
Designation Of The Adjusting Screws From The Distance Regulation Control Module - J428- "Master"
- Adjusting Screw
- Adjusting Screw
- Must not be turned - functions only as a pivot point
The procedure for adjusting the Distance Regulation Control Module 2 - J850- is identical to adjusting Distance Regulation Control Module - J428- "master".
To do this, move the ACC Reflector Mirror - Audi - VAS6430/3- -1- to the opposite side of the calibration beam.
Selection On The Vehicle Diagnostic Tester For The Adjustment Of The Distance Regulation Control Module 2 - J850- "Master":
- Press the following buttons one after another on the screen:
Follow the instructions on the screen to perform the adjustment.
Identification Of The Adjustment Bolts Of The Distance Regulation Control Module 2 - J850-
- Adjusting Screw
- Adjusting Screw
- Must not be turned - functions only as a pivot point