Jeff Hare Posted January 27, 2015 Report Share Posted January 27, 2015 Hi, I have purchased a GM ethanol sensor and am about to set it up. Â I have looked here: PCLink Help > Wiring Information > Input Signal Wiring > Digital Input Wiring > Ethanol Content Sensor Wiring Do I need to purchase a physical 2.2kohm resistor and wire it in or is it internal to the Link G4 ecu? Thanks Jeff Quote Link to comment Share on other sites More sharing options...
Scott Posted January 27, 2015 Report Share Posted January 27, 2015 Hi Jeff, If you have the GM/Siemens type ethanol sensor (cast metal body, two vertical fuel connections) then you will need to buy an external 2.2k resistor and wire it into the circuit. Scott Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted January 30, 2015 Author Report Share Posted January 30, 2015 Thanks Scott, how can I tell if I have a spare digital input? Â I have a Link Knockblock as well. Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted January 30, 2015 Author Report Share Posted January 30, 2015 I have this gm sensor, part number 13577429: http://www.gmpartsnow.com/oe-gm/13577429 Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted January 30, 2015 Author Report Share Posted January 30, 2015 I also have VVT setup so that might be using some of the digital inputs?? Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted February 2, 2015 Author Report Share Posted February 2, 2015 I found my digital inputs: DI1: VVT Cam Position DI2: VVT Cam Position DI3: Aircon Request DI4: IC Spray DI5: Speed DI6: Digital Knock Feedback Can any of these be setup as analog inputs as I have spare ones there? Quote Link to comment Share on other sites More sharing options...
Simon Posted February 2, 2015 Report Share Posted February 2, 2015 Unfortunately all those need to be digital. Do you have an external knock block fitted? If not then you can do away with the knock feedback. Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted February 2, 2015 Author Report Share Posted February 2, 2015 Yes I have an external knock block fitted. Although I dont have an IC Spray so Im wondering what that is being used for? Â Any ideas? Â I have attached a screenshot of its config so it looks like something is setup. Im trying to get in contact with my tuner to ask but hes away at the moment. Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted February 2, 2015 Author Report Share Posted February 2, 2015 Got a message back from my tuner that its the number of tables he thinks might already be maxxed out. Â Is this a normal occurence? Â How many tables are allowed? Quote Link to comment Share on other sites More sharing options...
Scott Posted February 3, 2015 Report Share Posted February 3, 2015 Hi Jeff, You need a digital input, so will have to sacrifice one of the functions already on a digital input. If you do not have an intercooler sprayer then this may be a good option. Which ECU do you have? If it is a plug-in ECU have a look at the bottom of the two boards and tell us which version it is. We can then advise you on which DI to use. The ethanol content sensor itself does not use a general purpose table slot, so don't think this will be your problem. If you attach your base-map we can confirm this. I believe the G4 ECUs had 12 general purpose table slots. Scott Quote Link to comment Share on other sites More sharing options...
Jeff Hare Posted February 3, 2015 Author Report Share Posted February 3, 2015 Thanks Scott, It is the plugin G4 for a:Â Impreza WRX GDA/GDB (8/00 - 11/05). I have attached my tune file. Quote Link to comment Share on other sites More sharing options...
Scott Posted February 3, 2015 Report Share Posted February 3, 2015 Hi Jeff, DI 4 (IC Spray switch) is definitely your best option if you don't actually have this on your model. There is no special hardware on the ECUs bottom board on this digital input, so it will work well for a ethanol sensor input. Scott Quote Link to comment Share on other sites More sharing options...
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