Induction module is another term for throttle body. I was under the impression that the throttle actuator was a separately replaceable part that attaches to the throttle body, and that would be what I would expect them to replace, not the complete throttle body. Maybe not.
I assume on the previous attempts at repairs they replaced the grip sensor. Now that they've replaced the entire system except for the ECM, what is their plan if it fails again? I assume a complete diagnostic including tracing all the wiring to see if there might be an intermittent open or short is out of the question, at least until you find a real tech and not a part changer.
Good luck, and I hope your ETC problems are behind you. If they aren't, and it happens again, I definitely suggest having an attorney contact the MoCo for you to facilitate a buy-back of an obviously unsafe vehicle. These bikes aren't worth risking your life for. As someone else on the site says quite often, this stuff isn't rocket science. However, somehow between the MoCo and the dealerships they seem to be able to make it all seem that way.
Jerry