2.0L CR TDI
Injector Quantity Adjustment (IMA) and Injector Voltage Adjustment (ISA)
These values represent the behavior of an injection valve (Piezo Injector). Caused by manufacturing tolerances the injectors have a unique behavior and get divided into separate classes. In combination with the automatically determined learning values of the engine control module the pre- and post-injections are being calculated individually for each valve. The behavior of an injection valve is also mileage dependent, so a valve with e.g. 10000 km has a different behavior then one with 70000 km. The control module determines these automatically while driving so the learning values change against the mileage. When altering one of the following values the learning values are being reset because the ECU thinks you are adjusting a new valve.
The IMA-ISA values need to be adapted when:
- One or more injection valves have been replaced. Make sure not to adjust the valves which have not been changed!
- The engine control module has been replaced.
- Do NOT adapt these values when you did not replace one of the above parts, also not for training or demonstration purposes.
The adjustment code can be found on the injector itself, it is a 7-digit value and does only use the following chars: 1,2,3,4,5,6,7,8,A,B,C,D,E,F,G,H,K,L,M,N,O,P,R,S,T,U,V,W,X,Y,Z. A value of AAAAAAA is also not valid.
- Ignition ON
- Engine OFF
[01 - Engine]
[Adaptation - 10]
Channel 071: IMA-ISA Value for Cylinder 1
Channel 072: IMA-ISA Value for Cylinder 2
Channel 073: IMA-ISA Value for Cylinder 3
Channel 074: IMA-ISA Value for Cylinder 4
[Done, Go Back]
- Switch Ignition OFF, wait 10 seconds and switch Ignition ON again. The values should be saved now, please verify them by double checking the adaptation values.