Lane Change Assistance, Calibrating

Special tools and workshop equipment required

Calibration Unit :VAS6350A

When a software update should be made, this must be performed before the calibration.

Conditions

-- The Lane Change Assistance Control Modules -J769- / -J770- must be calibrated in the "Guided Fault Finding" or "Guided Functions" operating mode under the following conditions. Refer to Vehicle Diagnostic Tester:

Lane Change Assistance Control Module -J769- or Lane Change Assistance Control Module 2 -J770- was replaced.
The rear bumper cover was damaged by a parking block, for example.
The rear bumper cover was removed and installed.
The threaded connections on the bumper mount are loosened.
"No or incorrect basic setting/adaptation" is stored in the DTC memory.

Preparing for Calibration

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Calibration Tool - Spacing Laser:VAS6350/2
- For distance measurement
- Usage information. Refer to the Owner's Manual.
Calibration Unit:VAS6350A
Level
- On the Calibration Unit:VAS6350A
- To check the horizontal position of the Calibration Unit:VAS6350A
Catch Bracket
- To mount the Calibration Tool - Spacing Laser Calibration Tool - Spacing Laser :VAS6350/2 for the distance measurement
- Distance to the Calibration Tool - Wheel Center Mountings :VAS6350/1 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 laser point is aligned to the center of the brand emblem
Calibration Tool - Wheel Center Mountings :VAS6350/1
- With wheel bolt adapter and measuring paddle
Measuring Scale
- For positioning the Calibration Tool - Lane Change Calibration Tool :VAS6350/4
Calibration Tool - Linear Laser :VAS6350/3
- With "laser protective eyewear"
- On the Calibration Unit :VAS6350A
- Switching on and off. Refer to Owner's Manual.
Plastic Foot
- Quantity: 3
- Can be adjusted when setting the horizontal position of the Calibration Unit :VAS6350A

Preliminary Work

-- Move the vehicle onto a solid, flat surface.

-- On vehicles with air suspension activate the "standard vehicle height" (MMI air suspension: comfort or radio).

-- Apply the parking brake - the vehicle must not move during the measurement.

-- Place the front wheels in a straight-ahead position - steering wheel in neutral position.

-- Connect the Vehicle Diagnostic Tester.

TIP

If a malfunction message appears in the display. Refer to the Vehicle Diagnostic Tester.

-- Turn on the ignition.

-- Remove the label with the metal foil from the bumper cover, if necessary.

-- Secure three suitable wheel bolt adapters for the wheel bolts on each Calibration Tool - Wheel Center Mountings :VAS6350/1 .

Fig 1: Identifying Wheel Pick-Ups On Wheel Mounting Bolts At Rear Wheels

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-- Insert the measuring paddle at both Calibration Tool - Wheel Center Mountings :VAS6350/1 and secure with the locking nut.

-- Place the Calibration Tool - Wheel Center Mountings :VAS6350/1 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 Mountings -VAS6350/1- on the wheels so that the "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 Unit :VAS6350A at distance -a- to the rear wheels.

Fig 2: Positioning Calibration Device VAS 6350

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Dimension -a- = 1, 700 mm

-- Switch on the Calibration Tool - Spacing Laser :VAS6350/2 with the ON button.

Fig 3: Identifying Laser Display

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Display on the Calibration Tool - Spacing Laser :VAS6350/2 :

"- - - m"

The laser is switched on at same time.

-- For distance measurement, hold the Calibration Tool - Spacing Laser :VAS6350/2 -2- flush to the left catch bracket as shown.

Fig 4: Holding Distance Laser VAS 6350/2 Flush To Catch Bracket

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The Calibration Tool - Spacing Laser :VAS6350/2 must lie firmly against the catch bracket.

-- Make sure the "laser beam" for the distance measurement contacts the enlarged lower part on the paddle -1-.

If this is not the case, measuring paddle height must be corrected using locking nuts on Calibration Tool - Wheel Center Mountings :VAS6350/1 .

-- Briefly press the ON button for distance measurement.

Fig 5: Identifying Display On VAS 6350/2

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Display on the Calibration Tool - Spacing Laser :VAS6350/2 :

"1, 700 m" (specified value: 1700 ± 2 mm).

-- Repeat the measuring procedure from the right stop bracket to the right rear wheel.

The distance value must be the same on both sides.

If both measured values are not the same, adjust the Calibration Unit :VAS6350A accordingly.

Calibrating

The Vehicle Diagnostic Tester is connected.

-- Select the Diagnostic mode and start.

-- Select the Test plan tab.

-- Press the Select individual tests button and select the following one after the other:

Body
Electrical Equipment
01 - OBD-capable systems
CF - Lane Change Assistance Control Module 2 -J770
CF - Lane Change Assistance Control Module 2, Functions
CF - Calibration

-- Start the selected program and follow the instructions in the Vehicle Diagnostic Tester display.

TIP

The following information clarifies which version of the lane change assistance is installed in the vehicle (SWA3.0).

This information for adjusting the calibration device is important for later steps in the procedure to avoid malfunctions.

-- Secure the Calibration Tool - Lane Change Calibration Tool :VAS6350/4 to the Calibration Unit :VAS6350A mount on the rear left.

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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	Q7 Basic	SQ7/Q7 S line
Adjustment dimension height in mm dimension -a-	681	675

-- The indicator on the base of the Calibration Tool - Lane Change Calibration Tool Calibration Tool - Lane Change Calibration Tool :VAS6350/4 must align with adjustment dimension on the measuring scale -1- on measuring field -arrow-.

Model	Q7 Basic	SQ7/Q7 S line
Left adjustment dimension read in mm on the measuring scale -1-	800	817

-- Connect the Calibration Tool - Lane Change Calibration Tool Calibration Tool - Lane Change Calibration Tool :VAS6350/4 to the vehicle electrical system voltage.

-- Bring the Calibration Unit :VAS6350A into a horizontal position by turning the plastic feet.

Observe the bubble level (sight glass) on the Calibration Unit :VAS6350A -arrow-.

Fig 6: Identifying Bubble Level (Sight Glass) On Calibration Tool VAS 6350
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-- Turn on the Calibration Laser :VAS6350/3A on the Calibration Unit :VAS6350A .

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-- Wear "laser protective eyewear".

-- Align the Calibration Unit :VAS6350A so that the Calibration Tool - Linear Laser :VAS6350/3 strikes the center of the brand emblem on the rear lid.

-- Check the distance on the left and right sides between the catch brackets of the Calibration Unit :VAS6350A and the measuring paddles -1- on wheel mountings again.

Fig 7: Holding Distance Laser VAS 6350/2 Flush To Catch Bracket

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Specified value: 1700 ± 2 mm

Calibration Procedure

The following should not occur during the calibration procedure:

There must be no metal reflectors within a 2 m radius of the calibration device (for example, 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 .

Procedure

Fig 8: Identifying Assistance Calibration Device VAS 6350/4 Components

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-- Turn on the Calibration Tool - Lane Change Calibration Tool :VAS6350/4 at the power switch -3-.

The green LED -1- must turn on.

-- If the red LED -2- comes on: Check the -VAS6350/4-.

-- 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 :VAS6350 .

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-- 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	Q7 Basic	SQ7/Q7 S line
Adjustment dimension height in mm dimension -a-	681	675

-- The indicator on the base of the Calibration Tool - Lane Change Calibration Tool:VAS6350/4 must align with adjustment dimension on the measuring scale -1- on measuring field -arrow-.

Model	Q7 Basic	SQ7/Q7 S line
Right adjustment dimension read in mm on the measuring scale -1-	800	817

-- Turn on the Calibration Tool - Lane Change Calibration Tool :VAS6350/4 at the power switch -3-.

Fig 9: Identifying Assistance Calibration Device VAS 6350/4 Components

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The green LED -1- must turn on.

-- Follow the instructions in the vehicle diagnostic tester display.

-- After calibrating the lane change assistance successfully, end "calibration", switch off the ignition and disconnect the data link connector.