Lane Assist Calibration Procedure

Special tools and workshop equipment required

Vehicle Diagnostic, Testing and Information SystemVAS5051B with corresponding diagnostic cable.
Setting DeviceVAS6430
Wheel Alignment Computer

NOTE:

Check if the directional stabilization assistance control module -J759- is seated in the bracket correctly.

Perform a visual inspection to see if the camera visual area is free.

Check the Diagnostic Trouble Code (DTC) memory and correct any malfunctions before beginning the calibration.

Before driving the vehicle onto the alignment stand, check if there is a enough space between the center of the wheel hub on the front wheels and the VAS6430. The distance between the VAS6430 and the center of the wheel hub on the front wheels must be 150 cm +/- 2.5 cm.

If there is not sufficient space, drive vehicle backward on alignment stand in order to be able to use the corresponding space.

Check the position of the calibration board on the calibration beam and align it with the center of the calibration board if necessary.

-- Follow the prerequisites for alignment. Refer to WHEEL ALIGNMENT TEST PREREQUISITES .

-- Connect battery charger. Refer to BATTERY, CHARGING .

-- Connect the VAS5051B to the vehicle. (Guide the diagnostic cable through the open window.)

NOTE:

During the calibration procedure, make sure all the vehicle doors remain closed and the vehicle exterior lighting is switched off.

-- On vehicles with air suspension, activate the vehicle lift mode in comfort level. Refer to VEHICLE LIFT MODE .

-- Position the front wheels so they are straight.

-- Select the lane assist calibration procedure in the alignment computer.

-- Install the quick clamps on all four wheels.

-- Install measuring sensors on the rear wheels.

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

NOTE:

The VAS6430 must not be moved on the calibration beam.

-- Position the VAS6430 at a distance of -A- 150 cm +/- 2.5 cm from the center of the wheel hub on the front wheels to the beam on the VAS6430 as shown in the illustration.

Fig 1: Positioning The Setting Device Basic Set VAS6430/1

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-- Install the front wheel measuring sensors -1- on the VAS6430.

Fig 2: Front Wheel Measuring Sensors

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NOTE:

The alignment stand must be in the lowest level position for the next step.

-- Enter the height value -A- between the VAS6430 contact patch and the wheel contact surface as shown in the illustration and enter it in the alignment computer.

Fig 3: Entering Height Value -A-

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-- Check the position of the calibration board on the calibration beam and align it with the center of the board if necessary.

Fig 4: Checking Position Of Calibration Board -A-

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-a- = -a--- Loosen the bolt -arrow- and place the measuring bar -1- on the floor.

Fig 5: Identifying Bolt And Measuring Bar On Floor

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-- Adjust the calibration panel to the specified height -2- according to the alignment computer using the crank -1-.

Fig 6: Adjusting Calibration Panel To Specified Height According To Alignment Computer Using Crank

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If the specified height was reached -2-, then the measuring bar must be pushed slightly forward and secured with the locking bolt.

NOTE:

If in later procedure the height of the calibration board must be corrected, make sure the measuring bar is touching the ground when this is being done.

-- Level the bubble level -A- using the adjusting screw -1-.

Fig 7: Identifying Bubble Level And Adjusting Screw

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NOTE:

The bubble adjustment -A- serves to compare the ground conditions.

-- Move the VAS6430 sideways in direction of -arrow B- until the display on the alignment computer is within the tolerance range.

Fig 8: Moving Setting Device VAS 6430 Sideways Until Display On Alignment Computer Is Within Tolerance Range

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-- Turn the bolts gently -2 and 3- to secure the VAS6430 (to keep the VAS6430 from rolling away).

Fig 9: Identifying VAS 6430 And Bolts

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-- Turn the precision adjustment screw -1- until the display on the alignment computer is located within the tolerance range.

Fig 10: Identifying Precision Adjustment Screw

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-- Level the bubble level -A- using the adjusting screw -1-.

Fig 11: Identifying Bubble Level And Adjusting Screw

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

Fig 12: Identifying Bubble Level And Adjusting Screw

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Perform Any Subsequent Work Using the Vehicle Diagnosis Tester.

-- Turn on ignition.

-- Touch Guided Fault Finding .

-- Select in succession:

Brand
Type
Model year
Version
Engine Code

-- Confirm data entered.

Wait until the VAS5051B has checked all available control modules in vehicle.

-- Press the go to button and select "function/component selection".

Then

-- "Body (Repair Group 01; 27; 50 - 97)".

-- "Electrical System (Repair group 01; 27; 50 - 97)".

-- "01- On Board Diagnostic (OBD) capable systems".

-- "5C - Lane assist".

-- "J759 - Directional stabilization assistance control module functions".

-- "J759 - Calibration".

Now follow the instructions on the screen to perform the calibration.

NOTE:

A step is performed in guided fault finding next to determine the body height.

-- Determine the body height -a- at all four wheels in the center of the wheel between the wheel contact surface and the lower edge of the fender.

Fig 13: Body Height

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