which is connected to the collector of Q6/Q8 where the old spark output used to be. In this configuration,
the output at the collector of the new transistors is exactly the opposite of what’s happening at the
collectors of Q6/Q8, which is turn have always been the opposite of what’s happening at the CPU pins
driving them. So, if the CPU is inactive, the spark outputs will be off.
NOTE: Having performed this modification, YOU MUST SET “SPARK OUTPUT INVERTED = YES”.
Back to MS2 Extra build:
27) Next we need to check that everything is OK before we plug in the microprocessor. Plug the board into your
stim and power it up.
Ensure you have 0-5V on TSEL, if you get any more than 5V you have a wiring issue with the trigger input
side. As long as you have 0-5V you can proceed to step 28.
28) Now your ready to test the board with the microprocessor in place. Fit U1 (black 40 pinned microprocessor
for MS1 or a daughter board for MS2) into the 40 pin connector.
Plug the ECU into your stim and turn the power on.
Feel the top row of power transistors, if they get hot at all turn the power off and check for faults.
If the microprocessor gets hot then turn it off. Slightly warm is OK, if any part is too hot to touch then there is a
fault!
29) Next you need to figure out your ignition driver(s) See the
MS1-Extra Ignition Manuals
or
MS2-Extra
manuals
for information specifically for your setup. BM Note: done this above.
30) Once the spark drivers are sorted, your ready to load the code into your MS-Extra ECU.
Check Miata 4G63 second input circuit (http://www.msextra.com/doc/ms2extra/MS2-Extra_4g63.htm#2hall)
Second Trigger Input (2 slot Sensor on CAS)
Second Hall Sensor Circuit - this needs to be built for Both V3.0 and V2.2 Boards.
2 slot sensor input for CAS on pin3 of the DB37 connector on a V3.0 PCB
2 slot sensor input for CAS on pin29 of the DB37 connector on a V2.2 PCB
BM Note: 1k resistor already exists on MS2 daughterboard.
Schematic:
