Audi Workshop Service and Repair Manuals

Calibration procedure Special tools and workshop equipment required

t  Vehicle diagnostic, testing and information system -VAS 5051 B- with appropriate diagnosis cable

t  ACC setting device -VAS 6430- t  Wheel alignment computer   Note t  Check that the lane departure warning control unit -J759- is seated correctly in the bracket. t  Check that the camera vision is unobstructed (visual inspection). t  Before commencing calibration, interrogate event memory and rectify any faults. t  Before driving the vehicle onto the alignment platform, make sure there is sufficient space between the hub centres of the front wheels and the setting device -VAS 6430-. The distance between -VAS 6430- and the hub centres of the front wheels must be 150 cm ± 2.5 cm. t  If the available space is not adequate, drive the vehicle backwards onto the alignment platform as required. t  Check the position of the calibration screen on the cross bar and align the calibration screen centrally if necessary. –  Observe test requirements for wheel alignment check → Chapter. –  Connect battery charger → Rep. gr.27. –  Connect vehicle diagnosis, testing and information system -VAS 5051 B- to vehicle. (Run diagnosis cable through open window.)   Note During the calibration, make sure that all doors are closed on the vehicle and that the exterior lights are switched off. –  Set front wheels to straight-ahead position. –  Select calibration procedure for lane departure warning system in wheel alignment computer. –  Attach quick-release clamps to all four wheels. –  Attach rear wheel alignment sensors. –  Carry out wheel rim runout compensation for rear wheels.   Note Do not take hold of the cross bar when moving the -VAS 6430-.

–  Set up -VAS 6430- as shown in illustration so that distance -A- measured from hub centres of front wheels to cross bar of -VAS 6430- is 150 cm ± 2.5 cm.

–  Attach front wheel alignment sensors -1- to -VAS 6430-.   Note For the next step the wheel alignment platform must be set at the lowest available position.

–  Determine height difference -A- between floor level where -VAS 6430- is set up and tyre contact surface as shown in illustration and enter this value in the wheel alignment computer.

–  Check the position of the calibration screen on the cross bar and align the calibration screen centrally if necessary. a = a

–  Loosen bolt -arrow- and set measuring bar -1- on floor.

–  Using crank -1-, adjust calibration screen to specified height -2- as indicated by wheel alignment computer. When specified height -2- has been set, move measuring bar up slightly and tighten securing bolt.   Note If the height of the calibration screen has to be corrected at a later stage of the procedure, the measuring bar must be set on the floor when making the adjustment.

–  Set spirit level -A- to horizontal position with adjuster screw -1-. The spirit level -A- has to be adjusted at this point to compensate for any floor irregularities.

–  Move -VAS 6430- sideways -arrow B- until display on wheel alignment computer is within tolerance.

–  Secure by tightening bolts -2- and -3--VAS 6430- lightly. (This will prevent the -VAS 6430- from rolling away).

–  Turn fine adjustment screw -1- until display on wheel alignment computer is within tolerance.

–  Set spirit level -A- to horizontal position with adjuster screw -1-.

–  Set spirit level -B- to horizontal position with adjuster screw -2-. The remaining steps are now performed using vehicle diagnosis, testing and information system. –  Switch on ignition. –  Touch the Guided Fault Finding button on the display screen. –  Select the following: t  Make t  Model t  Model year t  Version t  Engine code letters –  Confirm the entered information. Wait until the vehicle diagnostic, testing and information system has interrogated all the control units in the vehicle. –  Press the Go to button and select the option „Function/component selection“. –  Select the relevant program in „Guided Functions“. Then follow the instructions on the screen to perform the calibration.   Note The next step required in the Guided Fault Finding program is to measure the height of the body.

–  Measure height of body -a- at all four wheels between tyre contact surface and bottom edge of wing panel at centre of wheel.