Adaptronic Modular ECUs have the ability to compensate for the stoichiometric ratio change when using ethanol fuel over gasoline. In order to automatically compensate for this change a flex fuel sensor is required. The flex fuel sensor has an added bonus that Adaptronic Modular ECUs can utilize is they read the temperature of the fuel which is an additional sensor input that is used to create an even more accurate fuel model.
Sensors are labeled for wiring;
Out ( output to standalone ecu, CAS3 normally)
GND( chassis ground, not sensor ground)
VCC( +12V switched)