Diagnostic tester, connecting

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Recommended special tools and equipment e.g.:

Fig 1: VAS 5052 Vehicle Diagnostic And Service Information System With

Courtesy of VOLKSWAGEN UNITED STATES, INC.

VAS 5052 Vehicle Diagnostic and Service Information System with
VAS 5052/3 diagnostic cable

Requirements

Fig 2: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

The respective fuses of the Motronic fuel injection and ignition system must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Battery voltage must be at least 11.5 volts.
All electrical consumers such as, for example, lights and rear window defroster must be switched off.
Parking brake must be engaged or else daylight driving lights will be switched on.
For vehicles with automatic transmission, selector lever must be in -P-.

If vehicle is equipped with an A/C system, it must be switched off.
Ground (GND) connections between engine and chassis must be OK.
Ignition switched off.

Work procedure

Connect diagnostic tester (VAS 5052) using (VAS 5052/3) diagnostic cable as follows:

Fig 3: Locating DLC

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect diagnostic cable connector to Data Link Connector (DLC) -arrow-.
Depending on the desired diagnostic mode, it is necessary to:

switch on ignition

start engine. Refer to Selectable diagnostic modes under address word 33 - OBD

NOTE:

Respective operation of the diagnostic tester:

Refer to Operating instructions of the diagnostic tester

If no display appears on diagnostic tester, check voltage supply at Data Link Connector (DLC):

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations