1999 Audi A8 BaseFACTORY OEM SERVICE PROCEDURE

Selecting functions: Notes

After establishing the data link, checking the control module version, and pressing the --> button:

Indicated on display (function selection, example 02 "Check DTC Memory"):

Fig 1: VAG1551 Scan Tool Display - Selecting Functions
G02727014Courtesy of AUDI OF AMERICA, INC.

You can now select one of the functions listed below. Start the troubleshooting procedure using the "Check DTC Memory" function 02.

  1. Check Control Module Versions
  2. Check DTC Memory
  3. Output Diagnostic Test Mode
  4. Basic Setting
  5. Erase DTC Memory
  6. End Output
  7. Code Control Module
  8. Read Measuring Value Block
  9. Read Individual Measuring Value
  10. Adaptation
  11. Login Procedure

Comprehensive descriptions of how to use the functions "Erase DTC Memory" and "End Output" are found in the next section.

Descriptions of how to use the other functions are found in the relevant sections of this Repair Manual.

When a function has been completed, press the --> button to return to the beginning of the troubleshooting procedure ("Select function XX").

Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

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

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

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