General Information & Location
Fig. Location of diagnostic connector
The diagnostic connector is located on the dashboard, below the climate controls, hidden behind a cover plate.
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