Automatic Test Sequence

Automatic test sequence

During test and repair work malfunctions can be recognized from other control modules (e.g. plug disconnected). Therefore DTC memory of all control modules must be checked and
erased. Perform the following steps:
- Press button -0- twice to insert "Automatic Test Sequence" address word 00 and press -Q- button to confirm input.

The V.A.G1551 transmits all known address words one after the other. When a control module answers with its identification, the number of stored DTCs or "No DTC recognized" appears on the display. Any system malfunctions that are stored will be displayed one after the other and printed out. The V.A.G1551 will then transmit the next address word.

Indicated on display 1)

V.A.G - ON BOARD DIAGNOSTIC HELP
1 - Rapid data transfer
2 - Blink code output
1) Operating modes 1 and 2 are displayed alternately

- Erase DTC memory and carry out test drive.

Observe the valid safety precautions during a test drive. Safety Precautions

During the test drive the following operating conditions must be fulfilled:
- Coolant temperature must exceed 85 °C.
- When the temperature is reached, all operating conditions (idling, part throttle, wide open throttle, and overrun) must be attained several times.
- At wide open throttle engine speed must exceed 3500 RPM.
- Again, check DTC memory of all control modules using "Automatic Test Sequence."

If no DTCs are stored:
- Press -> button.

Indicated on display

Rapid data transfer HELP
Select function XX

- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Turn off ignition.