Led Headlamp, Adjusting

The headlamp must be calibrated after the following procedures:

• Headlamp position was changed (removing and installing, loosening and tightening the screws)
• The Drivetrain Control Module -J775- was calibrated or replaced.
• The Vehicle Electrical System Control Module -J519- 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 headlamp basic setting is missing.

Requirements

• Pay attention to the testing and adjustment requirements. Refer to HEADLAMP, ADJUSTING, GENERAL INFORMATION .
• The angle dimension is set on the headlamp adjusting unit. Refer to the appropriate Headlamp Adjusting Unit Operating Instructions.

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.

TIP:

The image and the following description apply to analog headlamp adjusting units. On digital headlamp adjusting units, for example Headlamp Adjusting Unit:VAS 621001  , follow the operating instructions. Refer to the appropriate Headlamp Adjusting Unit Operating Instructions.

The headlamp adjusting unit must be aligned to the vehicle.

-- To do this, slide the headlamp adjusting unit a distance of 100 mm (3.94 in.) centered in front of the vehicle and aligned to the vehicle front. Refer to the appropriate Headlamp Adjusting Unit Service Information.

-- Slide the headlamp adjusting unit in front of the corresponding headlamp and check the alignment again.

-- LED headlamp before product improvement (8IT, 8IY): align the headlamp adjusting unit in the center of the reflector segment indicated -1-.

Courtesy of AUDI

-- LED headlamp from product improvement (8IT, 8IY): align the headlamp adjusting unit in the center of the reflector segment indicated -1-.

Courtesy of AUDI

• The horizontal cut-off line must touch the cut-off line -1- on the adjusting unit test surface.
  Fig 1: Headlamp Adjustment Graph

  Courtesy of AUDI
• The bend point -2- between the left horizontal part and the right rising part of the cut-off line must run vertically through the central mark -3-. The bright core of the light beam must be to the right of the vertical.

• After adjusting the low beam according to the instructions, the center of the high beam light beam must be on the central marking -3-.

-- 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-.

TIP:

The right headlamp layout is a mirror image.

-- After the headlamp adjustment has been successful, follow the instructions on the Vehicle Diagnostic Tester display in order to leave the standard air suspension height.

-- Disconnect the diagnostic connector.