I have a second hand MS2V3.0 ECU and I built a new harness for it. Only took me a couple years... Being the MS is second hand, I really have no idea what the individual had it configured for. I was told it was used on a 740. Chris Dodson has been helping me and pretty much went through the ECU and set up some things I wanted (Individual COP outputs etc.). While going over everything one last time and trying to understand how all this **** works, I started questioning certain things that were wired in the box.
Thoughts from the experts on the following:
1. Looks like the board is configured for Coil Negative Ignition. However, I have the DB37 wired up for using the stock VR 60-2 CPS which is what I am wanting....
Why do I feel its Coil Negative? :
a. The board has TSEL jumped to OPTOOUT and the TACHSELECT jumped to OPTOIN.
b. XG2 is jumped to XG1.
However, Coil Negative states D1, D2, and C30 should be fitted. D1 and D2 are both just jumped between both of their leg holes and C30 is just plain empty...
2. If I am right and that is wired as Coil Negative, what do I need to do to change this to work with the stock CPS as VR?
a. Manual says TSEL to VROUT and TACHSELECT to VRIN
b. Manual shows diodes in D1 and D2... do I need them? remember mine is just jumped with a wire...
3. What does Pin 36 *IGN OUTPUT get wired to? I cant seem to find out this information. I have a brown wire just waiting here for somewhere to go...
a. Chris wired up Spark outputs using the resistor method in the Proto area to run COP LS2 coils. I think this may answer the pin 36 question but I am unsure..
b. Does it get wired into the stock tachometer somewhere? if yes, which wire?
c. If b.is no, What operates the tachometer reading?
4. Do I need a resistor inline with the CPS wiring? I have read people were having cut out issues and start up issues without one...
Any help you guys can provide me will be greatlyt appreciated as I have no car until this is finished...