Car Scanner Pro app for Diagnostics

Part of the problem is individual pdfs don't provide all the information needed. Online the links work; in the pdf they don't. Wiring diagrams spred over many pages of a pdf don't make it easy to trace circuits and find parts locations which are in another pdf; online is easier. Theory of operation is another abbreviated document; the whole Toyota TIS scheme is setup for trained and experienced techs who don't need routine details. On top of that changes are not available in some early captures floating around the ether.

As a result many independent shops use alternate sources from places like Alldata. Which still charge.

 

A lot of what you'd want for theory-of-operation is covered in the New Car Features manual, which is also available on TIS, and is quite thick, not abbreviated very much. It's the thing the repair manual assumes you've already read, so you know what the different pieces are there for and how they do it.

People just don't as often make big PDFs of that to share around.

Beyond that, there's a whole humongous library of technician training course materials on TIS, for questions you might still have even after reading New Car Features.

 

So, when you put it in neutral, what RPMs do the MGs show?

 

When mine showed state of charge on the hybrid battery (in my Gen 5), I was surprised to learn that the charging rate in the CHG mode was only about 15 amps, (probably to preserve fuel economy). Hard braking delivered nearly 200 amps regen power.

Unfortunately, that feature seems to have been removed from Car Scanner.

 

MG2 shows the RPM directly related to the car's road speed, according to the final drive ratio and the MG2 reduction ratio.

MG1 shows the RPM you can find on the nomograph by plotting a line between the engine RPM and the ring gear RPM (for which you can use the MG2 RPM reduced by the MG2 reduction ratio, or the wheel RPM increased by the final drive ratio).

There is no change in those RPMs from the instant before you put it in neutral. (After that instant, of course, they will continue to vary according to the car speed and engine RPM, always according to the math above.)

Whatever those RPMs are whenever you decide to shift again from neutral to another selection, there is no RPM change at that instant either.

 

Fact or wishful thinking?

 

Well, I don't know what Car Scanner Pro would show, not having used it, but are you thinking maybe it would show different RPMs than Techstream, and Scan Gauge II, and Autel AP200, which I have used, all unanimously show?

And if you could find an app, whether Car Scanner Pro or anything else, that did show you different numbers than the math with the transmission's gear tooth counts will tell you, how would you explain the numbers shown by such a hypothetical app?

 

I know this has you triggered, but I don't believe a Prius can coast in neutral without computer/electric assist. OK?