Obviously first check that the connectors are fully home at the ECU, igniter and coil, but you've most likely already done that and try another igniter.
The next thing is to check the coil resistance:
Don't worry too much about the resistance reading you get as the above is for a MR2 Turbo, what you are looking for is a resistance reading that is similar as an OL, out of range or infinite resistance reading would indicate a break in the coil circuit being tested and mean the coil is of no use.
If the above has not identified the fault, then you need to check for continuity on the wire between the ECU IGF input pin and the igniter IGF output pin. This gets a little more tricky without a true circuit diagram. I would try the above first and if that does not identify your problem, we can look further into finding the IGF wire. I'm sure it's the grey/black wire and connects to the ECU in plug 1 possibly pin7, but not 100% without checking.