Diagnostic Trouble Code (DTC) Memory, checking and erasing: Notes

WARNING: This page is about a different car, the 2004 Audi A6, 2003 Audi A6, 2002 Audi A6, 2001 Audi A6, and 2000 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.

Connect vehicle Diagnostic, Testing and Information System VAS 5051 or VAG 1551 Scan Tool and select "Engine Electronics" by entering address word 01. See VEHICLE DIAGNOSTIC, TESTING AND INFORMATION SYSTEM VAS 5051 OR VAG 1551 SCAN TOOL, CONNECTING AND SELECTING FUNCTIONS . When doing this the engine must be idling.

NOTE: After erasing the DTC memory generate readiness code. See READINESS CODE, GENERATING .

Switch on printer with Print button (indicator light in button lights up).

Indicated on display

Fig 1: VAG 1551 Scan Tool Display - Checking And Erasing DTC Memory (1 Of 5)

Courtesy of AUDI OF AMERICA, INC.

Operate scan tool according to information on display.
Press buttons -0- and -2- to select function "Check DTC Memory" and confirm entry with -Q- button.

The display will show either the number of malfunctions stored or the message "No DTC recognized".

Fig 2: VAG 1551 Scan Tool Display - Checking And Erasing DTC Memory (2 Of 5)

Courtesy of AUDI OF AMERICA, INC.

If no malfunction is stored:

Press --> button.

NOTE:

If no malfunction is stored in the DTC memory, do not erase memory, otherwise readiness code must be generated.
If the DTC memory was erased, generate readiness code. See READINESS CODE, GENERATING .

If one or more malfunctions are stored:

The stored malfunctions will be displayed and printed out in sequence.

Indicated on display:

Fig 3: VAG 1551 Scan Tool Display - Checking And Erasing DTC Memory (3 Of 5)

Courtesy of AUDI OF AMERICA, INC.

Locate and eliminate printed out malfunctions according to DTC table. See DIAGNOSTIC TROUBLE CODE (DTC) TABLE .
Press buttons -0- and -5- to select function "DTC Memory" and confirm entry with -Q- button.

Indicated on display:

Fig 4: VAG 1551 Scan Tool Display - Checking And Erasing DTC Memory (4 Of 5)

Courtesy of AUDI OF AMERICA, INC.

NOTE: If the ignition is switched off between checking DTC memory and erasing the DTC memory, the DTC memory will not be erased. It is therefore important to follow the procedure exactly, i.e. first check DTC memory and then erase it.

Press --> button.

Indicated on display:

Fig 5: VAG 1551 Scan Tool Display - Checking And Erasing DTC Memory (5 Of 5)

Courtesy of AUDI OF AMERICA, INC.

Press buttons -0- and -6- to select function "End Output" and confirm entry with -Q- button.

NOTE: During test and assembly work malfunctions can be recognized from other control modules, e.g. disconnected harness connectors. Therefore on completion the DTC memories of all control modules must be checked and erased. To do this perform automatic test sequence: