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[Martorias]

I assume that the DC DC Converter is always running.

Hi! Fun to see my FB-post linked
There's allegedly an additional DC/DC converter ziptied to the MBB on the newer (European) models which powers the second OBD-port.

[valnar]

Has anyone confirmed (or not) there is one on the USA models?

[Martorias]

Has anyone confirmed (or not) there is one on the USA models?

You could just lift the seat and see for yourself (just two screws)

[Tembrant]

There is one for the usa models, at least my 2021 FX has one

[valnar]

That's what I'm worried about.  I don't quite have access to my FXS until the Spring.

[sharagan]

I have an observation to share regarding the discharge on my FXS 2020.
Janaury 22nd 52%
February 6th 42%
February 13th 42%

The battery discharged from 100% to 42% and at this point it seems to have stopped. The bike is stored at a constant 20 Celsius.
I will observe it further and report back.

[Auriga]

The safety cutoff for the obd power supply is supposed to turn it off between 40-50 percent to prevent batteries from dying.

It sounds like you have hit it. The test would be whether you have 12v power on your second obd port.

[sharagan]

that is great news, so I do not have to pull any fuses I'll check the voltage on the OBD port tomorrow. Which one is the 2nd EU specific OBD2 port, under the seat or on the side?

[Auriga]

On the 2021 FX. I believe the one under the seat is the secondary connector. But you could check both, if they both come up without 12V, that'd be it.

[ninja62]

I can confirm the 2nd OBD port is the one under the seat (2020 FX)

Riccardo

[Martorias]

The information I saw from zero was that it'll disable the second port at 7% to not damage the battery. Mine keeps draining below 30% but not sure how much further as I'll charge it. Pulling the main fuse will stop it all of course so that's one way of storing.

[sharagan]

maybe the last firmware update adjusted the cutoff percentage for the OBD2 port (just guessing)

[sharagan]

damn, it was just a SOC calculation glitch. Now the bike shows 35% SOC.
The OBD2 port under the seat is still live, it shows 13.9V.
The one on the side has no reading when off and when turned on only 0.6V.

[Martorias]

maybe the last firmware update adjusted the cutoff percentage for the OBD2 port (just guessing)

I was hoping that too but doesn't seem like it unfortunately

[staples]

damn, it was just a SOC calculation glitch. Now the bike shows 35% SOC.
The OBD2 port under the seat is still live, it shows 13.9V.
The one on the side has no reading when off and when turned on only 0.6V.

On my 2018 FXS the 12v pin does not even exist on the side OBD port. If that pin is in there, that is very odd that it would only have 0.6V.