VAG 1551 scan tool, connecting and entering address word

NOTE: The VAG 1552 scan tool or VAS 5051 vehicle diagnostic, testing and information system can be used instead of the VAG 1551 scan tool, however VAG 1552 scan tool does not have the facility for printing out the information in the display.

Observe test requirements for the system concerned.

With ignition switched off, connect scan tool to the diagnostic connector using VAG 1551/3B cable. The diagnostic connector is under the dashboard on the left side.

Fig 1: Connecting VAG 1551/3 Scan Tool To DLC

Courtesy of AUDI OF AMERICA, INC.

Indicated on display

Fig 2: VAG 1551/3 Scan Tool Display - VAG On Board Diagnostic

Courtesy of AUDI OF AMERICA, INC.

NOTE:

If the display remains blank, check connections of diagnostic connector
The PRINT button is used for switching on the printer (the indicator lamp in the button comes on when the printer is switched on).
Depending on the program, additional operating information can be printed out by pressing HELP button of VAG 1551 scan tool.

Fig 3: Connecting VAG 1551/3 Scan Tool To DLC

Courtesy of AUDI OF AMERICA, INC.

Switch on ignition.
Switch on printer by pressing PRINT button of scan tool.
Press button -1- for "Rapid data transfer" operating mode.

Indicated on display

Fig 4: VAG 1551/3 Scan Tool Display - Enter Address Word XX

Courtesy of AUDI OF AMERICA, INC.

NOTE: The address word selects the control module of the on-board system that you wish to test with the scan tool. It is made up of two digits, which are given in the relevant sections of this Manual.

For instance, press buttons -0- and -3- to enter the address word for "Brake electronics".

Indicated on display

Fig 5: VAG 1551/3 Scan Tool Display - 03 Brake Electronics

Courtesy of AUDI OF AMERICA, INC.

Press -Q- button to confirm input.

Indicated on display after entering address word 03

Fig 6: VAG 1551/3 Scan Tool Display - Tester Sends Address Word 03

Courtesy of AUDI OF AMERICA, INC.

NOTE: If an error occurs in the diagnostic communication between the scan tool and the control module, the display will show one of the four following messages:

Press HELP button to obtain a print-out of the possible causes of the error.

Fig 7: VAG 1551/3 Scan Tool Display - K-Wire Not Switching To Ground/B+
Courtesy of AUDI OF AMERICA, INC.
Test diagnostic wiring ("K" wire).

Fig 8: VAG 1551/3 Scan Tool Display - No Signal From Control Module
Courtesy of AUDI OF AMERICA, INC.
Test power supply and Ground (GND) connection to ABS control module (w/EDL) -J104-.

Indicated on display

Fig 9: VAG 1551/3 Scan Tool Display - Error In Communication Link

Courtesy of AUDI OF AMERICA, INC.

Repair error.
After repairing possible causes of error, enter address word 03 for brake electronics once again and confirm with -Q- button.

If the diagnostic communication between the scan tool and the control module is established and works properly, the display will now show the control module identification (X), the system designation (Y), the hardware and software version (Z), the coding (V) and the workshop code (W).

Fig 10: VAG 1551/3 Scan Tool Display - Control Module Identification (X), System Designation (Y), Hardware And Software version (Z), Coding (V) And Workshop Code (W)

Courtesy of AUDI OF AMERICA, INC.

NOTE:

The --> button is used for moving forward within the program.
The various on-board systems to be tested are described in more detail in the relevant sections.
The control module index can only be changed by installing a new control module.
If the control module identification number does not appear in the display, check diagnostic wiring.

Press --> button.

Indicated on display:

Fig 11: VAG 1551/3 Scan Tool Display - Select Function XX

Courtesy of AUDI OF AMERICA, INC.