GenBoard/VerThree/FlexFuel

Flex Fuel Sensor input :

This GM / Siemens Fuel Composition Sensor(FCS) current: GM12570260 EOL sensor: 12570250

Hard to find connector available here: [HU Webshop Ethanol Sensor Connector]

or: [US Webshop Ethanol Sensor Connector]

And a how-to on setting up display in VemsTune is available: [VemsTune FlexFuel Setup Guide]

Sensor reads in Hz.

Basic sensor testing:

Note, sensor stops operating below 5.5 VDC. 16 VDC was the upper end of testing.

. .
Ethanol/HzHz. Freq.% of gasoline% of EthanolWheel Speed Reading (km/h)
5010008
559559
60 - E10901011
65851512
70802013
75752514
80703015
85653516
90604017
95554518
100505019
105455520
110406021
115356522
120307023
125257524
130208025
135 - E85158526
140109027
145 - E95059528
1500010029

170Hz is error output (self diagnostics built into sensor)

With anytrim function


[external link for sensor] (config settings not relevant)