Ok, I just had a DUH moment here........... Bert's chart/diagrams are for a k100, with 2 coils......... you are working on a k75 with 3.
So, pin #10 will be +12 into the ign computer from the ign/kill switch, and +12v power to the coil packs.
Pin 9, 12, and 14 will be the switched ground for the return path of the coil packs.
When you hit the starter button, the ign computer is energizing the FI relay, and the starter relay......... so the IGN computer is doing this much.
You have tested the hall sensors, and they tested ok..... but the IGN computer doesn't appear to be responding to the hall sensor inputs, as it's not pulsing the coils(pins 9, 12, and 14) or sending the signal(pin 8) to the EFI computer to enable the injectors.
Did you read any mvDC(10-20) on pin #8 when starter is turning? Without this, the EFI won't pulse the injectors.
Ok, I'm not going to make an asumption with this next question, when were taking this last set of readings for pins 9 and 14 you were "back probing" the connector with the connector plugged into the controller?
I know that some tests need to be taken with the plug disconnected, yet some do need to have the plug connected for the proper reading. Bert didn't seem very clear on this issue.