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MCU2 Upgraded S - Power auto-shutting off on USB / 12v adapter now?

kmob07

Member
Jul 6, 2016
74
97
New York
Is the “always-on” power behavior in the center console ports somehow different for MCU2 cars?

I just upgraded from MCU1 / AP2 to MCU2 / AP3 (HAPPILY!) but since the upgrade the items powered off my center console are all shutting off sometime after I leave the car.

In my ‘17 Model S I have plugged into my center console:
- USB1 = OEM Tesla lightning holder bracket
- USB2 = USBA-> USBC to power MiFi hotspot (for blackvue cameras and escort radar detectors)
- 12v adapter = USB-A power to non-OEM wireless charging mat.

Post-upgrade, I added a tiny flash USB key to one of the USB ports for sentry (works great). But every morning when I come out to the car the MiFi hotspot is dead. It immediately powers up and starts charging at 0% when I go into the car, so it seems clear the ports shut off at some point.

Am I perhaps crazy and this was always the case? (I don’t think so). Or is there a setting somewhere to change this behavior?
 

murphyS90D

Member
Jul 2, 2016
689
483
Horsham, PA
The power has always shut off. I had to run a cable to the OBD2 port to get always on power. It doesn't shut off immediately. I have not bothered to measure the delay. My guess is it shuts off when the car goes to sleep. All cars now go to sleep at night. In 2014 that was not the case.
 

kmob07

Member
Jul 6, 2016
74
97
New York
Now THAT is interesting... Mine definitely stayed on for days at a time previously. I wonder if in the past I had something that was preventing my Model S from going to sleep... I do use teslafi, but that isn’t something that changed. My MCU1 was in a pretty lousy state of reliability before the upgrade, that may also have played a part...

In any case, THANKS for the insight. I have constant 12v that I tapped for my radar detector and blackvues up near the mirror. I guess I’ll need to another wire down to power the hotspot, which is the only other item that I need to keep on all the time. The phone chargers only need to be active when I’m in the car obviously.

PS if the ports are powering down when asleep... is Sentry mode still able to stay active and record events to the USB drive I have plugged in?
 

murphyS90D

Member
Jul 2, 2016
689
483
Horsham, PA
I can't answer that. My car is a 2016 pre-refresh that doesn't have sentry mode. I ran the wire from the OBD2 port to power my Blackvue camera when I want it to stay on. That hasn't happened at all since the pandemic hit. I don't need an endless recording of the back wall of my garage where the car spends all but 1 or 2 hours of the week.

That is an interesting point. The addition of sentry mode might have changed the power picture.
 

croman

Active Member
Nov 21, 2016
4,912
7,143
Chicago, IL
I think mcu2 doesn't have an always on setting. My ic is off with deep sleep but MCU comes on quickly which is way different than mcu1 where ic was far more responsive and stayed on.

12v might go to sleep to save power with mcu2.
 

cookie99

Member
Mar 14, 2016
911
459
California
I can't answer that. My car is a 2016 pre-refresh that doesn't have sentry mode. I ran the wire from the OBD2 port to power my Blackvue camera when I want it to stay on. That hasn't happened at all since the pandemic hit. I don't need an endless recording of the back wall of my garage where the car spends all but 1 or 2 hours of the week.

That is an interesting point. The addition of sentry mode might have changed the power picture.

is there a reason why you dont just use the power in the top of the rearview mirror enclosure? that one would be way closer, literally inches away, from where people normally put their blackvue and its always on.
 

murphyS90D

Member
Jul 2, 2016
689
483
Horsham, PA
is there a reason why you dont just use the power in the top of the rearview mirror enclosure? that one would be way closer, literally inches away, from where people normally put their blackvue and its always on.
I have the security module installed up there and don't want to risk damaging it. I already had the plug for the OBD2 connector. I don't want the camera on when parked in my garage so I have two outlets in the console and can connect to the power I want easily.
 

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