MATRIX LED HEADLAMP, CALIBRATING, USING Headlamp Adjusting Unit : VAS621001

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Headlamp Adjusting Unit: VAS621001 from software version 1.04.004

NOTE:

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)
The headlamp was adjusted.
The Drivetrain Control Module -J775- was calibrated or replaced.
One of the level control system sensors was replaced.
he Headlamp Range Control Module -J431- was replaced.
In the DTC memory an entry is present, which indicates an incorrect calibration of the Matrix headlamps.
Left Matrix Headlamp Power Output Module -A44-, Right Matrix Headlamp Power Output Module -A45- was replaced.

Requirements

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

WARNING:

Avoid having ambient lighting too high or shaking.

f the ambient lighting is too high or is shaking, this can lead to incorrect measurements on the Headlamp Adjusting Unit: VAS 621 001 .

Procedure

Fig 1: Aligning Headlamp Adjusting Unit

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-- Align the : VAS621001 at the distance -a- = 100 mm (3.93 in.) to the center of the vehicle. Refer to the : VAS621001 Owner's Manual.

-- Check the parallel alignment of the : VAS621001 to the vehicle transverse axis. To do so, align the laser beam of the : VAS621001 to the left and right front fender bolts -arrows-.

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-- Push the : VAS621001 in front of the left headlamp and check the parallel alignment again.

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

Calibrating

The Vehicle Diagnostic Tester is connected.

-- Select the Diagnostic mode and start the diagnostic.

-- 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
55 - Headlamp Range Control Module (MxB) - J431
55 - Headlamp range control, functions
55 - Matrix beam basic setting

From here, the Vehicle Diagnostic Tester advances the calibration procedure forward. The low beam must be adjusted first for this procedure. Refer to HEADLAMP, ADJUSTING, LED HEADLAMP .

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 Headlamp Adjusting Unit : VAS621001 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 headlamp adjusting unit.

-- Align the : VAS621001 at the distance -a- = 100 mm (3.93 in.) to the center of the vehicle. Refer to the : VAS621001 Owner's Manual.

Fig 2: Aligning Headlamp Adjusting Unit

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-- Check the parallel alignment of the : VAS621001 to the vehicle transverse axis. To do so, align the laser beam of the : VAS621001 to the left and right front fender bolts -arrows-.

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-- Push the : VAS621001 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.