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Checking intake manifold change-over function > < Removing and installing throttle valve moduleJ338

A3 Mk2

Cleaning throttle valve moduleJ338
Cleaning throttle valve module -J338-
  Note
t  The throttle valve module must be adapted if a new engine control unit -J623- is installed.
t  Take care not to scratch the throttle valve housing when cleaning it.
–  Remove throttle valve module -J338- → Chapter.
   
–  Open throttle valve by hand and block it in the open position with a suitable object (e.g. plastic or wooden wedge) -arrow-.
  WARNING
Acetone is highly flammable. Please observe all accident prevention regulations and safety precautions when handling flammable liquids. Do not use compressed air when cleaning the throttle valve. Wear safety goggles and protective clothing to avoid possible injury and skin contact.
  N24-10125
–  Clean throttle valve housing thoroughly, especially around the points -arrows- where the throttle valve closes, using commercially available acetone and a small brush.
–  Wipe out throttle valve housing with a lint-free cloth.
–  Allow acetone to evaporate completely and re-install throttle valve module after cleaning.
–  Erase learnt values and adapt engine control unit -J623- to throttle valve module using → Vehicle diagnostic tester.
  N24-10124

Checking intake manifold change-over function > < Removing and installing throttle valve moduleJ338