audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Electrical system, self-diagnosis > < Adaption

A4 Mk1

Radio, Telephone and Navigation System - Self-diagnosis
Connecting vehicle diagnostic, testing and information system VAS 5051 or fault reader V.A.G 1551, and selecting functions
Connecting vehicle diagnostic, testing and information system VAS 5051 or fault reader V.A.G 1551, and selecting functions

Test requirements

  • ● Battery voltage at least 11 V
  • ● Earth connections on engine and gearbox OK
  • ● Fuse OK

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder

  • ● Earth connections and earth point for gearbox OK

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder

  • ‒ Check battery earth strap and earth strap between battery and gearbox.
  • ‒ Switch off ignition.

Note:

Diagnostic connection is located in front left knee restraint.
 
A24-0028
  • ‒ → Open rear ashtray and remove diagnostic connector cover.
 
A24-0029
  • ‒ → Connect vehicle diagnostic, testing and information system VAS 5051 with diagnostic lead VAS5051/1. Alternatively, connect fault reader V.A.G 1551 with diagnostic lead VAG 1551/3.
Attention:
  • ◆ On test drives the vehicle diagnostic, testing and information system VAS 5051 or the fault reader V.A.G 1551 must only be secured on the rear seat and operated from there.
  • ◆ Observe the safety precautions

 
→ Indicated on display:
V.A.G SELF-DIAGNOSIS    HELP
1 - Rapid data transfer*
2 - Flash code output*

* Displayed alternately

Note:

If display remains blank:

=> Fault reader operating instructions

  • ‒ Switch on ignition
  • ‒ Press Print key to switch on printer
    (lamp in key lights).
  • ‒ Press key 1 for "Rapid data transfer".
 
→ Indicated on display:
Rapid data transfer    HELP
Enter address word XX

Note:

Address word 00 starts the automatic test sequence, i.e. the fault memories of all vehicle systems with self-diagnosis capability are interrogated by way of rapid data transfer.

Electrical system, self-diagnosis > < Adaption