audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
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
   
t  The „Injector delivery calibration“ and „Injector voltage calibration“ serve to correct the injection rates for each cylinder of a common rail system individually across the entire operating range.
t  The 7-digit adaption value -1- (example) is marked separately on each injector. It may consist of letters and/or numbers (ASCII code).
  A23-10026
t  Reference table for reading out letters and/or numbers on each injector
Special tools and workshop equipment required
t  → Vehicle diagnostic tester
The adaption procedure is described in the „Guided Fault Finding“. (The procedure is also described under „Guided Functions“.) Use → Vehicle diagnostic tester
–  When a new injector is installed, the adaption value for the new injector must be stored in the engine control unit.
–  Additionally, check that the „Injector delivery calibration values“ with „Injector voltage 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.
–  When the engine control unit is renewed, the appropriate „Injector delivery calibration values“ with „Injector voltage calibration“ values must be written into the new engine control unit.
  A23-10137

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