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Always search for injection units in open state > < Injection units - Summary of components

Octavia Mk2

Adaptation for injector quantity adjustment (IQA code)
Adaptation for injector quantity adjustment (IQA code)
The function „injector quantity adjustment (IQA)“ of the engine control unit with the Common Rail system is used to correct the injection rate for each cylinder of the engine individually in the complete characteristic diagram area and thus to suppress the differences in the fuel dosage of the individual injection units as a result of manufacturing variances.
Each injection unit is factory-marked with an IQA code -1-.
   
View from the top of the injection unit
1 - IQA code
2 - Data matrix IQA code
3 - Part number
   The specifications provided in the figure are only one example.
After replacing the injection unit, the „IQA code“ of the new injection unit must be written into the engine control unit.
After replacing the engine control unit, the „IQA codes“ for all the injection units must be written into the new engine control unit.
Adaptation process → Vehicle diagnostic tester.
  Note
At the same time check if the „IQA codes“ for all the other injection units are correctly written. If the correct „IQA codes“ are stored in the engine control unit, these codes must never be entered again.
  A23-10372

Always search for injection units in open state > < Injection units - Summary of components