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Injectors: removing and fitting > < Air filter - assembly overview

Leon Mk2

Throttle valve control unitJ338: cleaning
Throttle valve control unit -J338-: cleaning
  Note
t  If a new engine control unit has been fitted, the throttle control unit must be adapted. Adapting is only carried out with the new or previously cleaned throttle control unit, because if there is dirt/carbon at the top limit of the throttle, the adapting readings could be faulty.
t  Do not scratch the throat of the throttle valve when cleaning.
–  Remove air filter housing.
–  Removing the throttle valve control unit.
   
–  Open the throttle by hand and lock the open position with an appropriate tool, such as a plastic or wooden wedge -arrow-.
  WARNING
Acetone is highly inflammable. Respect the accident prevention regulations and the safety indications when working with highly inflammable liquids. Do not use compressed air to clean the throttle valve. Wear safety goggles and appropriate clothing to avoid injury and contact with skin.
  N24-10125
–  Clean the throat of the throttle valve, above all in the area -arrows- of the closed throttle, working meticulously with a brush and normal acetone in accordance with DIN 53247.
–  Clean the throat of the throttle valve with a lint free cloth.
–  Wait for the acetone to evaporate completely and then fit the clean control unit.
–  Adapt engine control unit to the throttle valve control part → Vehicle diagnosis, testing and information system VAS 5051“Guided function”.
  N24-10124

Injectors: removing and fitting > < Air filter - assembly overview