MATRIX LED HEADLAMP, CALIBRATING USING Headlamp Adjusting Unit: VAS621001

Special tools and workshop equipment required 

• Approved Alignment & Adjustment Unit with software version 1.04.004

-- The Matrix LED headlamp is calibrated using the Vehicle Diagnostic Tester.

-- In this procedure the low beam is set first. Then the Matrix beam high beam function is calibrated.

The Matrix headlamp must be calibrated after the following work:

• Headlamp position was changed (removing and installing, loosening and tightening the screws)
• Headlamps were adjusted.
• The Drivetrain Control Module -J775- was calibrated or 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.
• In the DTC memory an entry is present, which indicates an incorrect calibration of the Matrix headlamps.
• Left LED Headlamp Power Output Module 1 -A31- /Right LED Headlamp Power Output Module 1 -A27- was replaced.

Requirements

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

Procedure 

-- Align the Approved Alignment & Adjustment Unit at the distance -a- = 100 mm to the vehicle center. Refer to the Approved Alignment & Adjustment Unit Owner's Manual.

-- Check the parallel alignment of the Approved Alignment & Adjustment Unit to the vehicle transverse axis by aligning the Approved Alignment & Adjustment Unit laser beam on the left and right front fender bolts -arrows-.

-- Push the Approved Alignment & Adjustment Unit in front of the left headlamp to check the parallel alignment again.

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

Calibrating Procedure 

The Vehicle Diagnostic Tester is connected.

-- 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
• 55 - Basic setting / 004B - headlamp basic setting

Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display. The low beam must be adjusted first for this procedure. Refer to LED HEADLAMP, ADJUSTING, VEHICLES FROM MY 2017 .

Further along in the program sequence a request is made to determine/read and to input the angle value of the inner segment edge of the left headlamp in the headlamp adjusting unit.

-- Center the light collecting box lens to the headlamp reference segment.

-- To do so, press the "OEM" button -arrow- in the main menu on the Approved Alignment & Adjustment Unit to start the measurement procedure.

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-- Select "Audi" -arrow-.

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Shown on display:

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-- Push the button -arrow- and wait until the light measurement is active.

Shown on display:

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-- Press the button -arrow-.

-- Wait until the light measurement is complete.

Shown on display:

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• The angle value of the inner reference segment edge 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.

Further along in the program sequence a request is made to determine/read and to input the angle value of the inner segment edge of the right headlamp in the Approved Alignment & Adjustment Unit.

-- Align the : VAS621001  at the distance -a- = 100 mm to the center of the vehicle. Refer to the Approved Alignment & Adjustment Unit Owner's Manual.

-- Check the parallel alignment of the Approved Alignment & Adjustment Unit to the vehicle transverse axis by aligning the Approved Alignment & Adjustment Unit laser beam on the left and right front fender bolts -arrows-.

-- Push the Approved Alignment & Adjustment Unit in front of the right headlamp and check the parallel alignment again.

-- Center the light collecting box lens to the headlamp reference segment.

Shown on display:

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-- Press the button -arrow-.

-- Wait until the light measurement is complete.

Shown on display:

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• The angle value of the inner reference segment edge 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.