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Checking return flow rate of injectors with engine running > < Checking injectors

A4 Mk3

Performing adaption of correction values for injectors
Performing adaption of correction values for injectors
The „Injector delivery calibration values“ function serves to correct the injection rates for each cylinder of a common rail system individually across the entire operating range.
The 7-digit adaption values -1- (details in illustration are only an example) are marked separately on each injector. The values may consist of letters and/or numbers.
   
Injector (view from above)
1 - Check sum
2 - Data matrix code
3 - Part number
When a new injector is installed, the adaption value must be written into the engine control unit.
When a new engine control unit is installed, the „Adaption values for injectors“ must be written into the new control unit.
Additionally, check that the „injector delivery calibration values“ are correctly entered for all the other injectors. Do NOT attempt to re-enter these values if the correct values are already stored in the engine control unit.
The adaption procedure is described in the Guided Fault Finding. (The procedure is also described in Guided Functions.)
  A23-10372

Checking return flow rate of injectors with engine running > < Checking injectors