Connecting VAS 5051 Scan Tool

Vehicle Diagnostic, Testing and Information System VAS 5051 or VAG 1551 Scan Tool, connecting and selecting functions.

Requirements

- Fuses for engine electronics OK
- Fuel pump relay OK
- Battery voltage at least 11 V
- Ground (GND) connection for engine and transmission OK
- Switch ignition off.

- Connect Vehicle Diagnostic, Testing and Information System VAS 5051 with VAS 5051/1 diagnostic cable. As an alternative, connect VAG 1551 Scan Tool with VAG 1551/3B diagnostic cable.







NOTE: The Data Link Connector (DLC) is located in the knee protection left front.


WARNING!
- When performing a road test and checks, the Vehicle Diagnostic, Testing and Information System VAS 5051 as well as the VAG 1551 may be secured only on rear seat, from where it is to be operated by a second technician.
- Please follow safety precautions


NOTE: Only the procedure for OBD with VAG 1551 is described below. For details of how to use the Vehicle Diagnostic, Testing and Information System VAS 5051, please refer to its operating manual.


Indicated on display


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

* Appears alternately

- If no display appears, check diagnostic cables:

Depending on the function required:
- Switch ignition on.
or
Start engine, table of available functions. [1][2]General Information

- Switch on printer with Print button (indicator light in button lights up).
- Press button -1- to select "Rapid data transfer" operating mode.

Indicated on display


Rapid data transfer HELP
Insert address word XX


- Press buttons -0- and -1- to insert "Engine electronics" address word 01.


Rapid data transfer Q
01 - Engine Electronics


- Press -Q- button to confirm input.


NOTE: If the display shows one of the messages reproduced here, run through the troubleshooting procedure as described in the "Electrical Wiring Diagrams, Troubleshooting and Component Locations".


Rapid data transfer HELP
Control module does not answer


Rapid data transfer HELP
Error in communication link


Rapid data transfer HELP
K wire not switching to Ground


Rapid data transfer HELP
K wire not switching to B+


The display on VAG 1551 will show the control module identification, for example:


4D0907558..4.2L V8/5V GD.. ->
Coding 06752 WSC 06388


4D0907558... Engine Control Module (ECM) Part No.
4.2 L Engine displacement
V8/5V Engine configuration (V8 5-valve)

- G "G" for vehicles with Cruise control system
- D... ECM Software version
- Coding 06752 Coding of ECM
- WSC 06388 Dealership code of VAG 1551 with which the last coding was performed


NOTE:
- Incorrect coding may lead to higher emissions and increased strain on the automatic transmission.
- Incorrect coding also causes non-existent malfunctions to be stored in the DTC
memory.


If the coding differs from the vehicle version, then:
- Check coding of engine control module
- Press -> button.

Indicated on display:


Rapid data transfer HELP
Select function XX


NOTE: After pressing the HELP button, an overview of the possible functions is printed out.