Lane Change Assistance, Calibrating
Special tools and workshop equipment required
- Calibration Tool: VAS6350A
- Calibration Tool - Spacing Laser: VAS6350/2A
- Calibration Tool - Lane Change Calibration Tool: VAS6350/4
- Vehicle Diagnostic Tester
Calibration/Adjustment must be Performed if:
- "No or incorrect basic setting/adaptation" is actively entered in the DTC memory of the Lane Change Assistance Control Module -J769- /Lane Change Assistance Control Module 2 -J770-.
- The Lane Change Assistance Control Module -J769- and/or Lane Change Assistance Control Module 2 -J770- has/have been removed and installed or replaced.
- The rear bumper was removed and installed.
- The rear bumper cover has been damaged or replaced.
- The rear bumper cover was painted near the control modules while installed.
TIP:
When a software update should be made, this must be performed before the calibration.
Preparing for Calibration
- Calibration Tool - Spacing Laser: VAS6350/2A
- For distance measurement
- Refer to the Calibration Tool - Spacing Laser: VAS6350/2A Operating Instructions for handling.
- Calibration Tool: VAS6350A
- Level
- On the Calibration Tool: VAS6350A
- To check the horizontal position of the Calibration Tool: VAS6350A
- Catch Bracket
- To mount the Spacing Laser: VAS6350/2A for the distance measurement
- Distance to the Calibration Tool - Wheel Center Mounting: VAS6350/1A on the rear wheels: dimension -a- = 1700 ± 2 mm
- Calibration Tool - Lane Change Calibration Tool: VAS6350/4
- Is moved from one side of the measuring field to the other during calibration
- When installed correctly, the vehicle electrical system voltage line must be connected at lower left of the calibration device (as seen in direction of travel)
- Brand Emblem
- The linear laser is aligned to the center of the brand emblem
- Calibration Tool - Wheel Center Mounting: VAS6350/1A
- With wheel bolt adapter and measuring paddle
- Measuring Scale
- For positioning the Calibration Tool - Lane Change Calibration Tool: VAS6350/4
- Calibration Tool - Linear Laser: VAS6350/3A
- With "laser protective eyewear"
- On the Calibration Tool: VAS6350A
- Refer to Calibration Tool - Line Laser: VAS6350/3A Owner's Manual for handling.
- Plastic Foot
- Quantity: 3
- Adjustable for adjusting the horizontal position of the Calibration Tool: VAS6350A
Preliminary Work
- Move the vehicle onto a solid, flat surface.
- Move the wheels so that they are in a straight-ahead position.
- For vehicles with rear axle steering, steer the rear axle to the zero position. Refer to Rear Axle Steering . This is the only way to ensure that the rear axle steering is in the straight-ahead position.
- Vehicles without air suspension: deflect the springs several times and let settle.
- Electromechanical parking brake applied.
- Vehicle exterior lamps switched off.
- All vehicle doors closed.
- Remove any label with the metal foil from the bumper cover, if necessary.
- Connect the battery charger for the battery support mode. Refer to BATTERY, CHARGING .
- Before starting the calibration/adjustment, check the DTC memory and correct all displayed entries.
Procedure
-- Check which hole circle the rims have.
-- Secure three suitable wheel bolt adapters for the wheel bolts on each Calibration Tool - Wheel Center Mountings: VAS6350/1A .
-- Insert the measuring paddle at both Calibration Tool - Wheel Center Mounting: VAS6350/1A and secure with the locking nut.
-- Place the Calibration Tool - Wheel Center Mountings: VAS6350/1A onto the wheel bolts on both rear wheels.
- The wheel center mounting rotation center must be in the wheel rotation center.
-- Place the Calibration Tool - Wheel Center Mounting: VAS6350/1A on the wheels so that any "anti-theft wheel bolts" are not connected to the wheel center mounting.
-- Adjust the measuring paddle using the locking nuts so that they move freely just above the floor.
- The measuring paddles must move easily.
- The measuring paddles must be vertical.
-- Position the Calibration Tool: VAS6350A at distance -a- to the rear wheels.
- Dimension -a- = 1, 700 mm
-- Using the bubble level (level indicator) -arrow-, bring the Calibration Tool: VAS6350A into a horizontal position by turning the plastic bases.
-- Wear "laser protective eyewear".
-- Turn on the Calibration Tool - Linear Laser: VAS6350/3A on the Calibration Tool: VAS6350A .
-- Align the Calibration Tool: VAS6350A so that the Calibration Tool - Linear Laser: VAS6350/3A strikes the center of the brand emblem on the rear lid.
-- Turn on the Calibration Tool - Spacing Laser: VAS6350/2A . Refer to Calibration Tool - Spacing Laser VAS6350/2A Operating Instructions.
The Following Display Appears 1 :
The display -2- shows how to position the Calibration Tool - Spacing Laser: VAS6350/2A .
- -arrow 1- : position with front edge
- -arrow 3- : position with rear edge
-- Press the corresponding button.
-- Hold the Spacing Laser: VAS6350/2A -2- for the distance measurement on one side of the calibration board flush to the catch bracket, as shown.
- The Calibration Tool - Spacing Laser: VAS6350/2A -2- must lie firmly against the catch bracket.
-- Push the measurement button briefly.
The laser switches on.
-- Make sure the "laser beam" for the distance measurement contacts the lower enlarged part of the measuring paddle -1-.
If that is not the case, correct the measuring paddle -1- height using the clamping screw on the Calibration Tool - Wheel Center Mounting: VAS6350/1A .
-- Use one hand to hold the Calibration Tool - Spacing Laser : VAS6350/2A firmly in the catch bracket on the Calibration Tool: VAS6350A ; the laser beam should be seen on the measuring paddle during this.
-- Then press the measurement button for the distance measurement briefly.
Display on Calibration Tool - Spacing Laser: VAS6350/2A :
- "1, 700 m" (specified value: 1700 ± 2 mm).
-- Repeat this measurement on the other side of the Calibration Tool: VAS6350A in the same way for the rear wheel.
- The distance value must be the same on both sides.
-- If both measured values are not the same, then readjust the Calibration Tool: VAS6350A correspondingly until the distance values are the same on both sides.
-- Make sure the Calibration Tool - Line Laser: VAS6350/3A strikes the center above the brand emblem and that the level indicator remains centered. Adjust if necessary.
Calibration Procedure
The following should not occur during the calibration procedure:
- No metallic reflectors may be located within a 2 m radius of the calibration tool (meaning tool carts, metal cabinets).
- Vehicle doors must not be opened or closed.
- People must not sit in the vehicle.
- People must not go between the vehicle and the Calibration Tool - Lane Change Calibration Tool -VAS6350/4-.
-- Connect the Vehicle Diagnostic Tester.
-- Switch the ignition on.
-- Select and start the Diagnostic operating mode.
-- Select the Test plan tab.
-- Select the Select individual test button and select the following tree structure consecutively:
- Diagnostic-capable systems
- 00CF - Lane Change Assistance Control Module 2 -J770-
- 00CF - Lane Change Assistance Control Module 2 functions
- 00CF - Calibration
-- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.
TIP:
The following information clarifies which version of the lane change assistance is installed in the vehicle (version SWA3.5).
-- Secure the Calibration Unit for Lane Change Assist: VAS6350/4 to the left rear side on the mount of the Calibration Tool: VAS6350A
- When installed correctly, the vehicle electrical system voltage wire must be connected at the bottom left of the calibration device (as seen in direction of travel).
Dimension -a- is measured from the upper edge of the calibration device to the floor.
| Model | A8 |
|---|---|
| Adjustment dimension height in mm dimension -a- | 720 |
-- The indicator on the base of the Calibration Tool - Lane Change Calibration Tool: VAS6350/4 must align with the adjustment dimension on the measuring scale -1- on the measuring field -arrow-.
| Model | A8 |
|---|---|
| Left adjustment dimension read in mm on the measuring scale -1- | 800 |
-- Connect the Calibration Tool - Lane Change Calibration Tool: VAS6350/4 -1- to the vehicle electrical system voltage and switch it on at the voltage switch -2-.
- The green LED -4- must turn on.
-- If the red LED -3- turns on, then check the Calibration Unit for Lane Change Assist: VAS6350/4 -1-.
-- Follow the instructions in the vehicle diagnostic tester display.
During the program sequence, there is a prompt to switch the Calibration Tool - Lane Change Calibration Tool: VAS6350/4 from the left to the right side of the Calibration Tool: VAS6350A
-- Turn off the Calibration Tool - Lane Change Calibration Tool: VAS6350/4 and reposition the calibration tool.
- When installed correctly, the vehicle electrical system voltage wire must be connected at the bottom left of the calibration device (as seen in direction of travel).
Dimension -a- is measured from the upper edge of the calibration device to the floor.
| Model | A8 |
|---|---|
| Adjustment dimension height in mm dimension -a- | 720 |
-- The indicator on the base of the Calibration Tool - Lane Change Calibration Tool: VAS6350/4 must align with the adjustment dimension on the measuring scale -1- on the measuring field -arrow-.
| Model | A8 |
|---|---|
| Right adjustment dimension read in mm on the measuring scale -1- | 800 |
-- Connect the Calibration Tool - Lane Change Calibration Tool: VAS6350/4 -1- to the vehicle electrical system voltage and switch it on at the voltage switch -2-.
- The green LED -4- must turn on.
-- Follow the instructions in the vehicle diagnostic tester display.
-- Switch off the ignition after successful calibration.
-- Disconnect the Vehicle Diagnostic Tester from the diagnostic connection.
-- Disconnect the battery charger. Refer to BATTERY, CHARGING .