Automatic Test Sequence

Automatic test sequence

During checking and repair 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 to select "Automatic test sequence"
- Press -Q- button to confirm input
- VAG 1551 transmits all known address words one after the other.

NOTE: When a Control Module answers with its identification; the number of stored malfunctions will appear on the display or "No malfunctions recognized."

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

Automatic sequence ends when display appears as shown.


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


* Appears alternately

- Erase all DTC memories and then make a road test.

Observe ALL safety precautions during road test.

During road test the following operating conditions must be fulfilled:
- Engine Coolant Temperature must exceed 85 °C.
- After the temperature is reached, attain the following operating modes several times:
- Idle (Closed throttle position)
- Part Throt (Partially open throttle)
- Full Throt* (Wide Open Throttle
- Decel
* At Full throt (Wide Open Throttle); engine speed must exceed 3500 RPM.

- Again, check DTC memories of all Control Modules using the "automatic test sequence."

If no malfunctions stored
- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press -0- and -6- buttons to select "End output" function 06.
- Press -Q- button to confirm input.
- Switch OFF ignition.