Car Scanner Pro app for Diagnostics

In the photo attached to #61, I see that when the photo was taken, the car was stationary (0 km/h) and the engine was running (1200 RPM, idle speed).

MG1 and MG2 are not both showing 0 RPM. MG2 is showing 0 RPM, as it always will when the car is stationary.

MG1 is showing a non-zero RPM, as it must if the car is stationary and the engine is turning. The digits in the photo are fuzzy and I'm not sure exactly what Car Scanner is saying that MG1 RPM is. If the engine RPM is 1200 and the car is stationary, MG1 should be doing 4320 RPM. That's where your line will fall on the nomograph if you draw one between 1200 engine RPM and 0 MG2 RPM.

That's all as was stated in #25 upthread.

More directly to the question "when you put it in neutral, what RPMs do the MGs show?", the answer, as above, is exactly the same RPMs as you would see in P or D or R or B at the same engine RPM and road speed. The way the transmission is built, the mathematical ratios between those RPMs are fixed for good. Shifting to N doesn't make any sudden change in any of those RPMs. (The RPMs may subsequently trend down or up—all keeping the same ratios to each other—given that you're now rolling in neutral and rolling to a stop or picking up speed downhill.)

Edit: I shouldn't really have said "keeping the same ratios to each other", but really should have said "keeping the same mathematical relationship to each other", that is, the relationship explained in #25 upthread.