GM LSx ECU ign output cct
Posted: Thu Nov 28, 2019 9:45 pm
Hi. What I am looking for is a partial schematic of a GM LS and newer ECU that shows the circuitry inside the ECU that drives the ignition coils. Specifically the little transistor and maybe collector pullup resistor and whatever else that gives the 0-5V output signal to the wiring loom that goes off to the ignition coils. I want to build an ECU simulator that gives the exact pulse output that a real ECU would, as far as voltage levels and drive capability is concerned. Just simply using a sig gen is not what I want. Any ideas?