[PilotXT]

That's interesting, it makes it a little less useful in a city setting I guess.

Anyway, yeah, just passing that along. Looks like it'll only stay on for 10-15 seconds regardless of the climate setting (HVAC on/off doesn't seem to matter here) - if the AVH is on. Will continue to test out, but found it interesting.

 

[PilotXT]

Your battery is showing its age. When my battery neared the end of its life the start-stop times became much shorter. You can verify this by seeing what your battery voltage is during the stop cycles, I'm guessing yours is less than 12V. Hold the passenger blue/red temp buttons in together and tap the tune knob twice to pull up the voltage.

I was considering this, but I find it peculiar that when I don't use AVH - and just use moderate braking pressure - the auto stop will remain engaged - the longest I've had was a full minute so far in my testing last week at a light.

One light in particular on my way home - if you miss it - you're stuck there for a couple of minutes... I am hoping to "catch" this one once for my testing.

I previously had leased a 2019 Forester Premium that had the auto stop system. I used it with AVH regularly, and did not notice this behavior. I am curious if it's a sensor issue or just an overlooked software glitch.

I will keep testing over the next week, along with taking some voltage readings as you've suggested.

OP: Interesting observation.
Since I have conditioned myself to turn off ASS as part of the startup procedure and rarely use AHV I have not noticed how the start/stop functions. When I have used AVH it has worked well.

Yes, I am also a big fan of AVH, as I've had some lower back issues that get aggravated related to keeping the extra tension for a long time (minutes) on the brake pedal, so I use it all the time.

 

[PilotXT]

Yes, I'm familiar with the cabin temperature playing a part in how long it will stay engaged. My Forester had an option to set the "cabin comfort" to eco, low, normal, or comfort settings which was related to that.

I am still not convinced. I hit the "long light" yesterday night on the way home and it stayed engaged for 2 full minutes, with several other 30 second to 60 second stops previously. It looked like my battery was showing about 12.7V when it first engaged. I did see it at one point during the long stop drop to 11.9 or 11.8, but the car did not seem to mind.

I don't think the battery is quite so close to replacement as has been suggested. I think it's just some quirk of the software. I'll continue to test over the next week now that temperatures are coming home and I can drive with the HVAC off.