Headlamp, Adjusting, Led Headlamp

Special tools and workshop equipment required 

• Headlight Adjusting Unit: VAS5209B 
• or
• Headlight Adjusting Unit: VAS621 001 

Testing and Adjusting Conditions

• Tire pressure OK
• The headlamp glass must be clean and dry.
• The headlamp glass must not be damaged.
• Headlamp reflectors and bulbs are OK.

• The vehicle must be under load.
• Vehicles with Matrix LED headlamps: Only use the : VAS5209B  or : VAS621 001  for the headlamp adjustment, because after the headlamp adjustment the Matrix LED headlamps must be calibrated. Refer to MATRIX LED HEADLAMP, CALIBRATING .

Vehicle load on driver seat in otherwise unloaded vehicle (curb weight).

• One person or 75 kg (37.4 lbs).

The curb weight is the weight of the operational vehicle with a completely full fuel tank, including the weight of all equipment carried while in operation.

• Fuel tank: at least 90% full.
• Equipment: for example, spare tire, tools, vehicle jack, fire extinguisher, etc.

If the fuel tank is not at least 90% full, the load must be created as follows.

-- Check the fuel tank fill level on the fuel gauge in the instrument cluster and compare it with the following table. Place additional weight in the luggage compartment, if necessary.

Fuel Gauge	Additional Weight in kg (lbs)
1/4	38 (83.7 lbs)
1/2	25 (55.1 lbs)
3/4	13 (28.6 lbs)
full	0
Example: if the fuel tank is half full, an additional 25 kg (55.1 lbs) must be placed in the luggage compartment.

• The headlamp must cool down to room temperature -- open the hood and touch the housing cover on the back of the headlamp.
• The electro-mechanical parking brake must not be engaged so that the vehicle is not under stress.
• The vehicle and headlamp adjusting unit must be on a level surface.
• Headlamp adjusting unit must be aligned to the vehicle. To do this, slide the headlamp adjusting unit a distance of 100 mm centered in front of the vehicle and aligned to the vehicle front. Refer to Headlamp Adjusting Owner's Manual.
• Slide the headlamp adjusting unit in front of the corresponding headlamp and check the alignment again.
• LED and Matrix LED headlamp: The headlamp adjusting unit must be aligned at the center of the marked reflector segment -1-.

  Courtesy of AUDI OF AMERICA, LLC

• The angle dimension is set on the headlamp adjusting unit. Refer to the Headlamp Adjusting Unit Operating Instructions.
• The angle dimension -arrow- is stamped for ECE countries on the upper edge of the headlamp -1- in "%".

  Courtesy of AUDI OF AMERICA, LLC

Preliminary Work

-- Turn the light switch to "low beam" - not to "Auto".

-- Close all the doors and the rear lid and keep them closed for the duration of the testing/adjusting procedure.

Procedure 

-- Connect the Vehicle Diagnostic Tester.

-- Select the Diagnostic  mode and start the diagnosis.

-- Select the Test plan  tab.

-- Select the Select individual test  button and select the following tree structure consecutively:

• Body
• Electrical system
• 01 - OBD-capable systems
• 55 - Headlamp Range Control Module - J431/J745
• 55 - Headlamp Range Control, Functions
• 55 - Basic setting

-- Continue to follow the instructions in the Vehicle Diagnostic Tester display.

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

Headlamp Adjustment 

• The horizontal cut-off line must touch the cut-off line -1- on the adjusting unit test surface.
• 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.

-- To adjust the height of the headlamp -1-, set the cut-off line above the dividing line with the adjusting screw -2-.

Courtesy of AUDI OF AMERICA, LLC

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

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

-- End the "basic setting" after a successful headlamp adjustment. Switch off the ignition and disconnect the diagnostic connector.