Quantity adjuster control range, checking: Notes
WARNING: This page is about a different car, the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, and 1997 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
The control range of the fuel injection quantity adjuster can be checked using output Diagnostic Test Mode (DTM) function 03, and "Read Measuring Value Block" function 08. In the output DTM, activate cold start injector -N108-, then exit using the -C- button. With this sequence, the cold start injector continues to be pulsed, and the quantity adjuster control range can be displayed using "Read Measuring Value Block" display group 4.