Automatic Test Sequence

Automatic Test Sequence

During test and assembly work malfunctions can be recognized from other control modules like e.g. plug disconnected. Therefore on completion the DTC memories of all control modules must be checked and erased. To do this:
- Press key 0 twice for address word "Automatic test sequence" and confirm entry with Q key. The VAG1551 transmits all known address words one after the other.

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

Any system malfunctions that are stored will be displayed one after the other and printed out. The VAG1551 will then transmit the next address word.

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


VAG On Board Diagnostic (OBD) HELP
1 - Rapid data transfer*
2 - Blink code output*


- Erase all DTC memories and then carry out a road test.

During the road test the following operating conditions must be fulfilled:
- The coolant temperature must exceed 80 °C.
- When the temperature is reached, the operating conditions (Idling, Part throttle, Full throttle and Overrun) must be attained several times.
- At full throttle the speed must exceed 3500 RPM.

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

If no DTC is stored:
- Press the -> key.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press keys 0 and 6 for the function "End Output" and confirm entry with the Q key.