OK, clear now - seems like you have checked all the obvious stuff...
Try looking at the ignition amp trigger signal voltage with a multimeter when you crank the engine - pin25 on the ECU and pin6 on the ignition module. You should be able to see the trigger signal turning on and off at cranking speed.
ECU Pin 24 (to ignition module pin 3) should be essentially ground, although you are likely to see a small voltage, less than 0.5V that may well fluctuate a bit when the engine is cranking/running - this is the trigger signal negative reference.
The ECU essentially links pins 25 and 24 (and hence the ignition module pins 6 and 3) with a transistor switch to fire the module and coil.
Presumably you have checked that there is a good earth connection from pin2 of the module (brown wire probably disappears into the loom) and a live feed to pin4 (the same live feed as coil +ve)?