Audi Cars 1999-05

Assembly Line Diagnostic Link (ALDL) or Data Link Connector (DLC)


General Information & Location

If available, the first step in performing component testing should be to check for any stored Diagnostic Trouble Codes (DTC's) using a VAG 1551, VAG 1552, or suitable scan tool.

The scan tool electrical connectors are located as follows:

1990-94 Passat models:

Center console forward of the gear selector, under the gear selector cover or boot

1995-97 Passat models:

On the dash behind a trim cover between the radio and the steering column

1996-2000 A4 models:

Center console in the rear ashtray, on the left, under trim a cover

1998-00 A4 and Passat models:

Behind a trim cover below the driver's side knee bar, left of the steering column