Automatic Test Sequence

Diagnostic Trouble Code (DTC) memory, checking and erasing

Automatic test sequence (function 00) for all DTC memories

Special tools and equipment
- VAG 1551/1552 Scan Tool using VAG 1551/3B adapter cable

Work sequence


NOTE:
All functions which could previously be performed with VAG 1551/1552 can also be performed with the tester VAS 5051.

Different Control Modules/Components are connected via the CAN-bus. Therefore is important to erase all DTC memories at the beginning, using the "automatic test sequence"

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

- Press -0- button twice for address word "Automatic test sequence" and confirm entry with -Q- button. VAG 1551 transmits all known address words one after another.

When a control module answers with its identification the number of stored DTCs appears on the display or "No DTC recognized."

Any system DTCs that are stored will be displayed one after the other and printed out. The VAG 1551 will then transmit the next address word.


The automatic test sequence has ended when the following is indicated on display.


V.A.G ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer*
2 - Blink code output*


* Appears alternately
- Erase all DTC memories and then road test vehicle.

Observe the valid safety precautions during a test drive. Read Measuring Value Blocks (Function 08)

During the road test the following operating conditions must be fulfilled:
- The coolant temperature must exceed 85 °C

When the temperature is reached, the operating conditions must be attained several times:

- Idling
- Part throttle
- Enrichment
- Wide open throttle
- Overrun

- At wide open throttle the engine speed must exceed 3500 RPM

- Again check DTC memory of all control modules using "automatic test sequence."

If no DTC is stored:

- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -6- for function "End output" and confirm entry with -Q- button.
- Switch ignition off.