Apologies for the late response. Thanks for the info, so those two trigger pins are direct connections to the ECU then, thanks. I understand the wasted spark setup, it was moreover to understand the direct wiring and the form of signalling which I expect is pulsing from ~+12v to 0 on each trigger given it seems to be averaging at just under +14v on those pins when running (tested only with a multimeter). Also wanted to see if there are other tacho/engine speed outputs that I could tap into, maybe the crank sensor...
Hence if yourself or anyone else has an ignition system/ecu connection circuit diagram you could share, I would be much appreciated.
The system I'm attempting to install is not a commercial off-the-shelf product, more like a DIY kit running off an Arduino nano board. The software allows for allot of control over the pulse per revolution and some signalling methods and conditioning, but I expecting the signalling on the Renault ignition system is either just too dirty or not compatible, hence I may need more tweaks to it. I've got hold of a scope now so I'll get some testing done tomorrow, plus a signal generator to test the device off of the car to rule that out.
If it's not already obvious I've gone gone down the faff route, but I do like a challenge
...If I get it working I post something on the forum, keep threatening to do a project thread one if these days. Cheers.