Scan Tool V.A.G 1551 , connecting: Requirements

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Volkswagen Jetta, 2001 Volkswagen Golf, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fuses 13, 29, 32, 34 and 43 OK.
Battery 11.5 volts min.
Ground (GND) connection between engine and body OK.
All electrical consumers, e.g. lights and rear window defogger, switched off.

Air conditioning off.
Selector lever must be in P (Park) or N (Neutral) on vehicles with an automatic transmission.