2G ECU internal resistor value

[Blinkyblinx9]

Just seeing if anybody knows the internal resistor values at pins 10 and 23 in this part of the MPI diagram? I want to replicate that portion of the circuit in my adapter harness to make an aftermarket ECU work with the factory ignition control module. This is the only issue holding me up and without knowing the specs of the MOSFETs this circuit controls within the ignition control module I can't figure it out for myself.

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[steve]

Those are not MOSFETs on the ECU outputs, they are BJT NPN transistors with pullups on the collector. I don't know the resistor values off hand and don't feel up to tracing the pins back to see if those transistors are on the 2G PCB or an internal part of the E310A IC. It's possible those pullups are the two resistors next to the E310A IC.

 

[Blinkyblinx9]

Those are not MOSFETs on the ECU outputs, they are BJT NPN transistors with pullups on the collector. I don't know the resistor values off hand and don't feel up to tracing the pins back to see if those transistors are on the 2G PCB or an internal part of the E310A IC. It's possible those pullups are the two resistors next to the E310A IC.

Forgive me, this isn't exactly the field I was trained in and despite having enough of an understanding of electrical principles to design and construct basic circuitry I do not know much of the terminology used. I'm fairly positive we are on the same page though.

I also meant the MOSFETs in the ignition control module that this ECU circuit switches. Using something that robust for a simple low current switch would be pretty silly and not at all cost effective.

Anyway would you be referring to the 390ohm resistors? I was going to invert the signal with a mystery pull up and a pn2222 since it has a max switching frequency of 3mhz but the more I read the more it seems as if it's going to be more complicated than that. Or is it really that simple and I'm just overthinking it?

Edit: I think I had the dumb... I have been misunderstanding how dwell works. Dwell is the time from when you energize a coil to when you cut power to induce a spike in the secondary. The signal isn't inverted like I thought because the coil isn't constantly energized until you switch it off. I thought dwell had something to do with the time it takes the spark plugs to fire from the time you cut power to the coil. Its only on as long as it absolutely needs to be. Any more and your just generating heat without any gain. I think all I need is a resistor low enough to quickly switch the MOSFETs in the control module.