Lane Assist Calibration
Lane Assist Calibration
Special tools, testers and auxiliary items required
• Vehicle diagnostic, testing and information system (VAS 5051 B) with corresponding diagnostic cable.
• Setting device (VAS 6430)
• Wheel alignment computer
• 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 (VAS 6430). The distance between the (VAS 6430) and the center of the wheel hub on the front wheels must be 150 cm ± 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.
- Follow the test requirements for an alignment. Refer to => [ Wheel Alignment Test Prerequisites ] Wheel Alignment Test Prerequisites.
- Connect the battery charger.
- Connect the diagnostic tester to the vehicle. (Guide the diagnostic cable through the open window.)
• 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 ] General Information.
- 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 wheel run out compensation on the rear wheels.
• Do not move the (VAS 6430) on the calibration beam.
- Position the (VAS 6430) at a distance of - A - 150 cm ± 5 cm from the center of the wheel hub on the front wheels to the beam on the (VAS 6430) as shown in the illustration.
- Install the front wheel measuring sensors - 1 - on the (VAS 6430).
• The alignment stand must be in the lowest level position for the next step.
- Enter the height value - A - between the (VAS 6430) contact patch and the wheel contact surface as shown in the illustration and enter it in the alignment computer.
- Loosen the bolt - arrow - and place the measuring bar - 1 - on the floor.
- Adjust the calibration panel to the specified height - 2 - according to the alignment computer using the crank - 1 -.
If the specified height was reached- 2 -, then the measuring bar must be pushed slightly forward and secured with the locking bolt.
• 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 -.
The bubble adjustment - A - serves to compare the ground conditions.
- Move the (VAS 6430) sideways - arrow B - until the display on the alignment computer is within the tolerance range.
- Secure the (VAS 6430) by tightening the bolts - 2 - and - 3 - slightly. (This prevents the (VAS 6430) from rolling away.)
- Turn the precision adjustment screw - 1 - until the display on the alignment computer is located within the tolerance range.
- Level the bubble level - A - using the adjusting screw - 1 -.
- Level the bubble level - B - using the adjusting screw - 2 -.
Subsequent work is performed using the diagnostic tester.
- Switch on the ignition.
- Touch Guided Fault Finding on screen.
- Select one after another:
• Brand
• Model
• Model year
• Version
• Engine code
- Confirm the data entered.
Wait until the (VAS 5051B) has checked all available control modules in vehicle.
- Press the Go to button and select "Function/Component Selection" function.
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.
• 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.
