Download The purpose of this function is to enable the technician to replace a faulty injector, or injectors, and program in the value of the new injector to the Diesel Control Unit. It may also be used when a new Control Unit has been installed and the technician is required to program it with the values of the injectors fitted. The function is available on all Diesel Engine Management Systems from 2002 onwards. There are two different methods for Injector Programming on FAL: The early method gives each injector a classification of 1, 2 or 3. The classification relates to the operating conditions of the injector. The control unit stores the classification of the injectors fitted and adjusts the treatment of each injector depending on the classification. The purpose of this is to improve performance and emissions. The Scan tool has the ability to read out the current classification of the injectors and program in the new classification.