james125 Posted April 15, 2019 Share Posted April 15, 2019 I'm trying to have a play around with the MAF sensor by modifying the signal the the ECU receives, but I can't quite figure out the pin out. There is nothing in the haynes manual about it. I think it should have a 2nd ground for the chassis and ECU. Anyone know why pin 4 is 14.4V? Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted April 16, 2019 Share Posted April 16, 2019 4 is the ignition feed - 14.4v is alternator charging voltage so that's fine. 2 is earth as you say 1 is PCM reference (5v) 5 is MAF signal The IAT is separate on this engine hence the empty pins. Quote Link to comment Share on other sites More sharing options...
james125 Posted April 17, 2019 Author Share Posted April 17, 2019 Thanks for the reply. Shouldn't the MAF signal be from 0 to 5V though? Quote Link to comment Share on other sites More sharing options...
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