VAG 1551 Scan Tool use:

Indicated on display

Fig 1: Identifying Scan Tool Display (1 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Operating modes 1 and 2 are displayed alternately

NOTE: If the display remains blank.

See Scan Tool operating instructions

Switch ignition on.
Switch on printer by pressing PRINT button (indicator lamp in button lights up).
Press button -1- to select "Rapid data transfer" operating mode 1.

Indicated on display

Fig 2: Identifying Scan Tool Display (2 Of 2)

Courtesy of AUDI OF AMERICA, INC.

NOTE:

In "Rapid data transfer" operating mode 1 the "Automatic Test Sequence" function 00 can be carried out. This checks the Diagnostic Trouble Code (DTC) memory of all the vehicle control modules (that have OBD capabilities) automatically.
Some OBD program text/data generated by control modules may not be recognized by VAG 1551/1552 scan tool with the latest program card. For example: scan tool display shows "text 799", "01529 references" or similar. In these cases, use VAS 5051 tester instead.