Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSAUDI1999A6 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTHEADLIGHTSON BOARD DIAGNOSTIC (OBD) - UP TO 2000AUTOMATIC VERTICAL HEADLIGHT AIM CONTROL SYSTEM (>M.Y. 1999), ON BOARD DIAGNOSTIC (OBD)CHECK DTC MEMORY (SCAN TOOL FUNCTION 02)AUTOMATIC VERTICAL HEADLIGHT AIM CONTROL SYSTEM

1999 Audi A6 Base

Automatic vertical headlight aim control system

1999 Audi A6 BaseSECTION Automatic vertical headlight aim control system

NOTE: The DTCs indicated are only updated when initiating On Board Diagnostic (OBD) or with "Erasing DTC Memory" function 05.

Switch printer on by pressing PRINT button (indicator light in button comes on).

Indicated on display

Fig 1: VAG 1551 Scan Tool Display - Check DTC Memory, Automatic Headlight Aim Control (1998-99) (1 Of 5)

Press buttons -0- and -2- to select "Check DTC Memory" function 05.

Indicated on display

Fig 2: VAG 1551 Scan Tool Display - Check DTC Memory, Automatic Headlight Aim Control (1998-99) (2 Of 5)

Press -Q- button to confirm input.

The number of stored Diagnostic Trouble Codes (DTCs) is shown on the display.

Indicated on display

Fig 3: VAG 1551 Scan Tool Display - Check DTC Memory, Automatic Headlight Aim Control (1998-99) (3 Of 5)

Stored DTCs are displayed in sequence and printed out one after another.

Repair malfunctions printed out according to DTC Table. See DIAGNOSTIC TROUBLE CODE (DTC) TABLE .

If "No DTC recognized" is shown on display

Fig 4: VAG 1551 Scan Tool Display - Check DTC Memory, Automatic Headlight Aim Control (1998-99) (4 Of 5)

Press --> button to return VAG1551 scan tool to "Select function XX" mode.

Indicated on display

Fig 5: VAG 1551 Scan Tool Display - Check DTC Memory, Automatic Headlight Aim Control (1998-99) (5 Of 5)

If anything else is indicated on display, see scan tool operating instructions.

Press buttons -0- and -6- to select "End Output" function 06. See END OUTPUT (SCAN TOOL FUNCTION 06) .
Switch ignition off.
Disconnect VAG1551 scan tool from DLC.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.