Any warning is good Andy.
The same thing could be emulated by using a float switch in the expansion tank, wired in series with the engine temperature sensor. If it's configured to go open circuit when the coolant is below minimum, then the ECM would see a fault on the CTS, and put the fans on and send the gauge to high temperature warning.
Yes, chinese software that, amongst other things, allows you to light up each Ipack lamp to test it.
Not sure if still available. Will try to find a link...
WoW SNOOPER is a quick and reliable diagnostic tool as replacement of Delphi ds150e and Autocom CDP+. It works on both Cars and Trucks more than 47 brands .