I figured this was a Serial Port compatibility issue. I tried both USB-Serial converter, by Prolific which is hugely popular and an old Dell with a serial port. I can see in caltool that I can select the right com port but ECU will not connect. I tried raising the speed from 9600 to 115.2k. This had no effect on cal tool, but when I ran the install package, it said "connecting to ECU..." The dots continued 1 per second for 20 minutes.
So does anyone know the serial port parameters the ECU is looking for? Is there a way to change or check them in cal-tool?