Automatic Test Sequence

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 key 0 twice for address word "Automatic test sequence" and confirm entry with Q key. The V.A.G 1551 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 DTCs that are stored will be displayed one after the other and printed out. The V.A.G 1551 will then transmit the next address word.

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

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

* Appears alternately

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

Observe the valid safety precautions during a test drive.

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
- Full throttle
- Overrun

- At full throttle the speed must exceed 3500 RPM

- Again check the DTC memory 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.
- Switch off ignition.