 To evaluate the effects of changes to parameters, development engineers access the relevant process variables with conventional measurement technology at sensors and actuators and read out the data from the ECU.Measured data internal to the ECU, e.g.intermediate results of a computational function, can be accessed via ASAM standard protocols XCP or CCP and the ECU’s standard interfaces (CAN, FlexRay, LIN, Ethernet/BroadR-Reach).