Flex sensors output both fuel temperature and ethanol content via a pulse-width-modulated signal. The ME platform supports the common GM & Continental Flex Fuel Sensor.  See here for details on Flex Fuel Strategies.

GM Sensor

Wire its signal line direct to a chosen Digital Input line and set that chosen pin to “Ethanol Sens.” from within MEITE to enable advanced Flex Fuel monitoring and control strategies. Connect up as per the image below:




Continental Sensor

The Continental Ethanol sensor has a part number of A2C53344228. It can be wired with its signal direct to the Digital Input of your choice. You can see the pin-out is written on the connector in the below image. Vdd should go to an ignition switched live, Out, is the signal (wire to your chosen Digital Input and set that input to “Ethanol Sens.” from within MEITE to enable advanced Flex Fuel monitoring and control strategies.), and Gnd should go to sensor ground.