Headlamp, Adjusting, Hid Headlamp

Test and Adjusting Conditions

• Tire pressure is 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.

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

• One person or 75 kg (165 lb).

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 in the instrument cluster fuel gauge 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 kg (83.7 lbs)
1/2	25 kg (55 lbs)
3/4	13 kg (28.6 lbs)
full	0
Example: if the fuel tank is half full, an additional 25 kg (55 lbs) must be placed in the luggage compartment.

• Roll the vehicle several meters or move it back and forth several times to set the springs.
• 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.
• The headlamp adjusting unit must be aligned to the vehicle. To do this, slide the headlamp adjusting unit a specified distance of centered in front of the vehicle and aligned to the vehicle front. Refer to Headlamp Adjusting Owner's Manual.
• The headlamp adjusting unit must be distance -a- 30 to 70 cm (12 to 27.5 in.) in front of the headlamp and should not deviate more than dimension -b- = 3 cm (1.1 in.) from the headlamp center point.
• The angle dimension is set on the headlamp adjusting unit. Refer to the Headlamp Adjusting Unit Operating Instructions.
• Slide the headlamp adjusting unit in front of the corresponding headlamp and check the alignment again.
• 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 "%".

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Preliminary Work

-- The vehicle must be on a level surface.

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

Procedure 

-- Connect the Vehicle Diagnostic Tester.

-- 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 - J431/J745
• 55 - Headlamp range control, functions
• 55 - Basic setting

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

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

Headlamp Adjustment 

• The horizontal light-dark border must touch the dividing line -1- on the adjusting unit test surface.
• The bend point -2- between the left horizontal part and the right rising part of the light-dark border 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 light-dark border above the dividing line with the adjusting screw -2-.

Courtesy of AUDI OF AMERICA, LLC

-- Then adjust the light-dark border, starting from the top, on the dividing line.

-- 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.