Hondata

Interesting points and I too wondered if ecu logic is a factor, as much as hardware limitation and temps will be the obvious ones.

Here's a run which shows the AFM.v (blue) hitting 5V limit just before 17:27, which led to a big step up in AFM g/s (red). It stayed at 5V limit, but the g/s is not ...

This is all speculation because I did not work for Honda. In automobiles, analog sensors have diagnostic levels. With a 5V sensor like the MAF, generally the diagnostic levels are < 0.5V and > 4.5V. This is part of the safety system design (ISO-26262). If the sensor measurement wire (analog ...

That makes perfect sense, thank you!

Understood, although I doubt Honda/Bosch will provide more details than this forum 😊

Hi, I have another datalog where AFM values will suddenly jump and stay at 303g/s. This happens from around 4.94 (AFM.V) for every run. Is this hitting a limit, hardware issue, or is my MAF really flowing 303g/s?

Are the datalogged AFM values (g/s) based on a sensor, or is it calculated, or read off the AFM table in the uploaded calibration?

I had assumed the g/s values are read off the AFM table, but looking at my datalogs, it doesn't seem so:
e.g.
From datalog: 280g/s @ 4.82V
From calibration: 260g/s @ 4 ...