VAS 5051 or VAG 1551, connecting

All functions previously performed with the VAG 1551 or VAG 1552 can also be performed using the VAS 5051 tester via operating mode vehicle self-diagnosis.

Refer to Operating instructions for VAS 5051 tester.

VAS 5051, connecting

Test requirements:

All fuses OK according to wiring diagram.
Battery voltage must be at least 11.5 volts.

Fig 1: Identifying VAS 5051 And VAS 5051/1 Or VAS 5051/3

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect VAS 5051/1 or VAS 5051/3 diagnostic wire to Data Link Connector (DLC)
Switch on ignition.

Select operating mode, vehicle system and function:

Press "Vehicle Self-Diagnosis" selection on display.
Select the vehicle system to be tested on display (touch screen).
Select the desired function on display.

Display will indicate the control module identification and the coding.

Display will indicate all relevant diagnostic functions.

NOTE:

Display fields in functions 04 (Basic setting) and 08 (Read Measuring Value Block) are listed from top to bottom.
The following test sequences are described for the VAG 1551 Scan Tool (ST).

VAG 1551, connecting

Test requirements:

All fuses OK according to wiring diagram.
Battery voltage must be at least 11.5 volts.

Fig 2: VAG 1551 Scan Tool With VAG 1551/3 Connected To Data Link Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect VAG 1551 Scan Tool (ST) with VAG 1551/3C cable to Data Link Connector (DLC).

NOTE:

If nothing is indicated on display, check voltage supply for VAG 1551 scan tool according to wiring diagram.

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Depending on the program, additional operating information can be printed out by pressing the HELP button of the VAG 1551 scan tool.
Function 00 "Automatic test sequence" can be performed in operating mode 1 "Rapid data transfer". This automatically checks all control modules installed in the vehicle.
The → button is used for advancing through the program sequence.
The PRINT button is used for switching on the printer (lamp in button lights up).

Indicated on display (* is displayed alternately):

VAG- On Board Diagnostic HELP
1 - Rapid data transfer*
2 - Blink code output*

Press button 1 for "Rapid data transfer".
Continue On Board Diagnostic (OBD) of vehicle system to be tested as described under "performing On Board Diagnostic (OBD).