Test requirements

Fuse OK per wiring diagram
See appropriate System Wiring Diagram article.
VAG1551 Scan Tool (ST) connected. See VAS 5051 TESTER OR VAG 1551/1552 SCAN TOOL (ST), CONNECTING .
Switch ignition on.

NOTE:

If the display remains blank, check the voltage supply of the VAG1551 Scan Tool (ST) according to the wiring diagram.
Additional operating instructions can printed out by pressing the HELP button.
The --> button is used to advance through the program sequence.
If an incorrect entry is made, press the -C- button to escape.
In "Rapid data transfer" operating mode 1 the "Automatic Test Sequence" function 00 can be carried out. This checks DTC memory of all vehicle control modules (with OBD capability) automatically.

Switch ignition on.
Switch printer on 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 1: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (1 Of 9)

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Address word for radio: 56

Indicated on display

Fig 2: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (2 Of 9)

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NOTE: While the On Board Diagnostic (OBD) program is running "DIAG" will appear on the radio unit display.

Through m.y. 2001

Indicated on display after about 5 seconds (example only):

Fig 3: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (3 Of 9)

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From m.y. 2002

Indicated on display after about 5 seconds (example only):

Fig 4: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (4 Of 9)

Courtesy of AUDI OF AMERICA, INC.

All vehicles

NOTE: Check/confirm coding using coding table. See CODING TABLE - THROUGH M.Y. 2001 .

Press --> button.
If display shows one of the following messages, carry out troubleshooting procedure as described in troubleshooting program for diagnostic wiring.

Fig 5: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (5 Of 9)

Courtesy of AUDI OF AMERICA, INC.

Fig 6: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (6 Of 9)

Courtesy of AUDI OF AMERICA, INC.

Fig 7: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (7 Of 9)

Courtesy of AUDI OF AMERICA, INC.

Fig 8: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (8 Of 9)

Courtesy of AUDI OF AMERICA, INC.

See appropriate System Wiring Diagram article.

Indicated on display

Fig 9: VAG1551 Scan Tool Display - Initiating Radio On Board Diagnostic (9 Of 9)

Courtesy of AUDI OF AMERICA, INC.

After the HELP button is pressed, a list of the possible functions is printed out.