Matrix Led Headlamp, Adjusting/Calibrating

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The Matrix LED headlamp is calibrated using the Vehicle Diagnostic Tester.
For this procedure, the low beam is adjusted first on the left headlamp and then the matrix high beam is calibrated immediately after that. Then the low beam is calibrated on the right headlamp, followed by the matrix high beam.

Special tools and workshop equipment required

Headlamp Adjusting Unit:VAS 621 001 from software version 1.10.000

Fig 1: Headlamp Adjusting Unit
Courtesy of AUDI

The headlamp must be adjusted/calibrated after the following procedures:

Headlamp position was changed (removing and installing, loosening and tightening the screws)
The Driver Assistance Systems Front Camera -R242- was replaced.
The Drivetrain Control Module -J775- was calibrated or replaced.
The Vehicle Electrical System Control Module -J519- was replaced.
Left LED Headlamp Power Output Module 1 -A31- /Right LED Headlamp Power Output Module 1 -A27- was replaced.
The Left Rear Level Control System Sensor -G76-, Right Rear Level Control System Sensor -G77-, Left Front Level Control System Sensor -G78- or Right Front Level Control System Sensor -G289- was replaced.
There is an entry in the DTC memory that indicates the matrix headlamp basic setting/calibration is missing.

Requirements

Pay attention to the testing and adjustment requirements. Refer to HEADLAMP, ADJUSTING, GENERAL INFORMATION .

CAUTION:

If the ambient lighting is too high or is shaking, this can lead to incorrect measurements on the.

- Avoid having ambient lighting too high or shaking.

Procedure

-- Turn on the low beams (but not set at "Auto").

-- Connect the Vehicle Diagnostic Tester.

-- 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:

Vehicle functionality
Adjusting/calibrating headlamps

TIP:

When this program is selected, the suspensions moves into the air suspension normal level and the headlamps go into basic setting.

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

-- During the program, it will be asked to perform a headlamp adjustment.

Fig 2: Aligning Headlamp Adjusting Unit

Courtesy of AUDI

-- Align the Headlamp Adjusting Unit:VAS 621 001 at the distance -a- = 100 mm (3.94 in.) to the vehicle center. Refer to the appropriate Headlamp Adjusting Unit VAS 621 001 Service Information.

-- Check the parallel alignment of the Headlamp Adjusting Unit:VAS 621 001 to the vehicle transverse axis by aligning the Headlamp Adjusting Unit:VAS 621 001 laser beam on the left and right front fender bolts -arrows-.

Courtesy of AUDI

To prevent a glare for other motorists, pay attention to the exact orientation of the headlamp adjusting unit.

-- Push the Headlamp Adjusting Unit:VAS 621 001 in front of the left headlamp and check the parallel alignment again.

-- Align the Headlamp Adjusting Unit:VAS 621 001 centered to the indicated segment -1-.

Courtesy of AUDI

-- Press the "OEM" button -arrow- on Headlamp Adjusting Unit:VAS 621 001 in the main menu.

Courtesy of AUDI

-- Select "Audi" -arrow-.

Courtesy of AUDI

Shown on display:

Courtesy of AUDI

-- Press the button -arrow- for the left low beam headlamp.

-- Wait until the light measurement is complete.

-- To adjust the height of the headlamp -1-, first set the cut-off line just under the dividing line with the adjustment screw -2-.

Courtesy of AUDI

-- Then adjust the cut-off line on the dividing line starting from the bottom.

-- For side adjustment, turn the adjusting screw -3-.

-- After successful adjustment of the low beams press the left button -arrow-.

Courtesy of AUDI

A reference segment is activated as the program sequence continues.

-- Position the Headlamp Adjusting Unit:VAS 621 001 centered to the headlamp reference segment.

Shown on display:

Courtesy of AUDI

-- Press the button -arrow- for Matrix beam 1.0.

-- Wait until the light measurement is complete.

Shown on display:

Courtesy of AUDI

The angle value of the edge of the inner reference segment for the left headlamp is shown.

-- Enter the angle value -arrow- of the inner reference segment edge in the Vehicle Diagnostic Tester. While doing so, pay attention to the sign if necessary.

Shown on display:

Courtesy of AUDI

-- Press the button -arrow-.

During the program sequence you will be asked to move the Headlamp Adjusting Unit:VAS 621 001 from the left to the right side.

-- Align the Headlamp Adjusting Unit:VAS 621 001 at the distance -a- = 100 mm (3.94 in.) to the vehicle center. Refer to the appropriate Headlamp Adjusting Unit VAS 621 001 Service Information.

Fig 3: Aligning Headlamp Adjusting Unit

Courtesy of AUDI

Fig 4: Checking Parallel Alignment Of Headlamp Adjusting Unit

Courtesy of AUDI

-- Push the Headlamp Adjusting Unit:VAS 621 001 in front of the right headlamp to check the parallel alignment again.

-- Align the Headlamp Adjusting Unit: VAS 621 001 centered on the low beams reflector segment.

Shown on display:

Courtesy of AUDI

-- Press the button -arrow- for the right low beam headlamp.

-- Wait until the light measurement is complete.

-- Adjust the right headlamp low beams the same way as the left headlamp.

Shown on display:

Courtesy of AUDI

-- After successful adjustment of the low beams press the right button -arrow-.

A reference segment is activated as the program sequence continues.

-- Position the Headlamp Adjusting Unit:VAS 621 001 centered to the headlamp reference segment.

Shown on display:

Courtesy of AUDI

-- Press the button -arrow- for Matrix beam 1.0.

-- Wait until the light measurement is complete.

Shown on display:

Courtesy of AUDI

The angle value of the edge of the inner reference segment for the right headlamp is shown.

-- Enter the angle value -arrow- of the inner reference segment edge in the Vehicle Diagnostic Tester. While doing so, pay attention to the sign if necessary.

-- After completing the calibration, read the DTC memory and correct any existing faults.