volkswagen Workshop Repair Guides

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Testing jammed-open injectors > < Assembly overview - injectors
Adapting the correction values for injectors
Adapting the correction values for injectors
The function „Adaptation of correction values for injectors“ serves to correct the injection rates for each cylinder of a common rail system individually across the entire ignition map range.
The 7-digit correction values -1- (details in illustration are only an example) are marked separately on each injector. The marked values may consist of letters and/or numbers.
   
Top view of injector
1 - Checksum
2 - Data Matrix Code
3 - Part number
After renewing an injector, the correction value must be written into the engine control unit.
After renewing the engine control unit, the „correction values for the injectors“ must be transferred to the new engine control unit.
The adaptation procedure is described in Guided Fault Finding.
Also 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.
Select correct vehicle in Guided fault finding.
–  Press „GoTo“ button.
–  Press „Function/component selection“.
–  Select „drive (Rep. Gr. 01; 10 - 39)“.
–  Select respective engine code.
–  „01 - Self-diagnosis compatible systems“
–  Select „01 - Diesel direct injection and glow plug system EDC 17“.
–  Select „01 - Functions“.
–  Select „01 - Read/adapt correction values for injectors“
  A23-10372

Testing jammed-open injectors > < Assembly overview - injectors