Audi Workshop Service and Repair Manuals

During test and assembly work faults can be recognised from other control units like e.g. plug disconnected. Therefore, on completion, the fault memories of all control units must be interrogated 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 unit answers with its identification the number of stored faults appears on the display or "No fault recognised".

Any system faults 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.

• ‒ Erase all fault memories and then carry out a road test.

Observe the valid safety measures during a test drive .

• 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
      Overrun
  must be attained several times.
• ‒ At full throttle the speed must exceed 3500 rpm.

• ‒ Again interrogate the fault memories of all control units using the "automatic test sequence".

If no fault is stored:

• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.