Andy1205 Posted December 16, 2022 Report Share Posted December 16, 2022 Component/circuit description ECM pin Signal Condition Typical value Oscilloscope setting Wave form Alternator m7 Ignition OFF 11-14V Alternator m7 Ignition ON 2 V/2 ms IMAGE 1 Alternator m7 Engine idling 2 V/5 ms IMAGE 2 Alternator m33 Ignition ON 0-1V Alternator m33 Engine idling 2 V/5 ms IMAGE 3 DOES ANYONE KNOW HOW TO CONTROL A ALTERNATOR LIKE THIS USING THE G4+ THUNDER ECU? Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 17, 2022 Report Share Posted December 17, 2022 If it is the 3 pin "smart charge" alternator then it doesnt need anything. With only the main battery cable connected and nothing else it will charge at about 14.5V. If you want an alternator light then just set up an aux output to switch on a lamp if battery voltage drops below say 12.7V or similar. Quote Link to comment Share on other sites More sharing options...
Andy1205 Posted December 17, 2022 Author Report Share Posted December 17, 2022 Thank you so much, I believe this is the pinout for it, it would be great if thats all i have to do make my life so much easier Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 17, 2022 Report Share Posted December 17, 2022 Yep im sure thats the same one i've used. I dont know why they use the term "data link", they arent, one is just a PWM control signal from the ecu that changes the voltage set point (ie they charge at a higher voltage on a cold morning etc), the other is just an electrical load signal from the alternator to the ecu - probably used in part of the OEM idle control strategy. Quote Link to comment Share on other sites More sharing options...
BURGESS.DJ Posted January 21, 2023 Report Share Posted January 21, 2023 Hi there would this be the same as Mazda Mzr engine in NC MX5 ? As im having a couple of issues trying to get it to work on that vehicle trying to control the D terminal initially i started with the NB1/2 Plug in config but nothing is making any difference Running FURY X Latest Firmware Thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 22, 2023 Report Share Posted January 22, 2023 Sounds like it. What voltage are you getting from it? Quote Link to comment Share on other sites More sharing options...
FordFuckus Posted February 5 Report Share Posted February 5 Hi, I have a 2006 2.0 duratec. Running a microsquirt v3 ecu. How can I get the alternator to work without the stock ecu. Quote Link to comment Share on other sites More sharing options...
Laminar Posted February 5 Report Share Posted February 5 The Megasquirt forums might be a better place to ask. I don't know if Microsquirt supports it, but the MS3 supports open loop variable frequency alternator control natively. Quote Link to comment Share on other sites More sharing options...
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