Vehicle diagnostic, testing and information system VAS5051 or VAG1551, connecting and selecting functions: Requirements

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Audi S8, 2003 Audi A8, 2002 Audi S8, 2002 Audi A8, and 2001 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

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 VAS5051 with VAS5051/1 diagnostic cable. As an alternative, connect VAG1551 scan tool with VAG1551/3 diagnostic cable.

Fig 1: Connecting VAG1551 Scan Tool To Data Link Connectors
Courtesy of AUDI OF AMERICA, INC.

NOTE: The Data Link Connector (DLC) is located below the dash, to the left of the steering column.

WARNING:

When performing a road test and checks, the vehicle diagnostic, testing and information system VAS5051 as well as the VAG1551 may be secured only on rear seat, from where it is to be operated by a second technician.
Please follow safety precautions. See SAFETY PRECAUTIONS .

NOTE: Only the procedure for OBD VAG1551 is described below. For details of how to use the vehicle diagnostic, testing and information system VAS5051, please refer to its operating manual.

Indicated on display

Fig 2: VAG1551 Scan Tool Display - Connecting And Selecting Functions (1 Of 9)

Courtesy of AUDI OF AMERICA, INC.

* Appears alternately

If no display appears, check diagnostic cables:
See System Wiring Diagrams .

Depending on the function required:

Switch ignition ON.
or

Start engine, see AVAILABLE FUNCTIONS .
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:

Fig 3: VAG1551 Scan Tool Display - Connecting And Selecting Functions (2 Of 9)
Courtesy of AUDI OF AMERICA, INC.
Press buttons -0- and -1- to insert "Engine electronics" address word 01.

Fig 4: VAG1551 Scan Tool Display - Connecting And Selecting Functions (3 Of 9)
Courtesy of AUDI OF AMERICA, INC.
Press -Q- button to confirm input.

Fig 5: VAG1551 Scan Tool Display - Connecting And Selecting Functions (4 Of 9)
Courtesy of AUDI OF AMERICA, INC.

If the display shows one of the messages shown in Fig 6 , Fig 7 or Fig 8 , run through the troubleshooting procedure as described in System Wiring Diagrams .

Fig 6: VAG1551 Scan Tool Display - Connecting And Selecting Functions (5 Of 9)

Courtesy of AUDI OF AMERICA, INC.

Fig 7: VAG1551 Scan Tool Display - Connecting And Selecting Functions (6 Of 9)

Courtesy of AUDI OF AMERICA, INC.

Fig 8: VAG1551 Scan Tool Display - Connecting And Selecting Functions (7 Of 9)

Courtesy of AUDI OF AMERICA, INC.

The display on VAG1551 will show the control module identification, for example:

ENGINE CONTROL MODULE (ECM) INFORMATION

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
or	"A" for vehicles with Automatic distance control
A
D...	ECM Software version See CODE CONTROL MODULE (FUNCTION 07) (ENGINE CODES AUX, AKB)
Coding 06753	Coding of ECM See CODE CONTROL MODULE (FUNCTION 07) (ENGINE CODES AUX, AKB)
WSC 06388	Dealership code of VAG1551 with which the last coding was performed

NOTE:

Incorrect coding may lead to higher emissions and increased strain on the automatic transmission resulting from harsh gear change jolts.
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. See CODE CONTROL MODULE (FUNCTION 07) (ENGINE CODES AUX, AKB) .
Press button.

Indicated on display: (Vehicle Identification Number (VIN))

Fig 9: VAG1551 Scan Tool Display - Connecting And Selecting Functions (8 Of 9)

Courtesy of AUDI OF AMERICA, INC.

WAUZZZ4DZYN000126: 17 - character VIN of vehicle
AUZ7Z0W0801181: 14-character identification number of control module of immobilizer.

Press --> button.
Indicated on display:

Fig 10: VAG1551 Scan Tool Display - Connecting And Selecting Functions (9 Of 9)
Courtesy of AUDI OF AMERICA, INC.

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