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12v Outlet Shutdown Time ?

15K views 15 replies 6 participants last post by  Lexden  
#1 ·
I've just fitted a Dash Cam to my i3 and it takes its power from a 12v outlet. It starts recording the moment it has power and stops once the power supply is cut.

In my Leaf, the 12v outlet is linked to the ignition state so goes off as soon as I press the stop button on the car but it appears that the i3 power outlets stay live for quite some time after shutting the car off and locking it.

Has anyone got a definitive answer as to how long the outlets stay live and are they both (one under the dash and one in the armrest cubby hole) on the same time or does one shut off earlier than the other.

As things stand my cam is recording lots of nothingness which results in more interesting older files being overwritten.

Any help would be appreciated guys ;).

Many thanks,

Don
 
#2 ·
About 5 minutes is the best I can tell you. Or double press the stop button again to turn off the centre display. Can't remember off the top of my head if that knocks off the 12v too. What happened to Key position 1 being electrics active and 2 being ignition active. These new - key sensing and stop start button thingies isn't making things easy.
 
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#3 ·
Thanks for the advice, earlier it seemed like 5mins might have been about right but this evening whilst plugged into the charger (good old brick as I'm waiting for a wall unit to be installed) it was still live 15mins later. I decided to go back to the car and simply pull the adapter and then ask the relevant question on here.

I'll give the double "off" with the start/stop button a try and see if that works.

Thanks,
Don
 
#5 ·
All I know is when I go for a snooze at lunch time when I wake up its not on any more ;-)
I actually want to know the opposite - how can I keep it on when the car is powered down. I prefer the old key position 1 at least then you knew sidelights and internal sockets were active. This clever key sensing stuff isn't helping anyone.
 
#7 ·
Ok so it's no looking good for taking a feed from the 12v outlets, especially as when the charge cycle starts they live up again.

With this in mind can anyone suggest where is the best place to pick up a 12v feed that will shut off as soon as the STOP button is pressed ?

Thanks for all your replies :)

Don
 
#8 ·
@Don might be worth posting to the FB group, I know there are few US people with dash cams, I never paid much attention to the discussion to remember what they did...

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https://www.facebook.com/groups/BMWi3/
 
#13 ·
This is how my I3 works (taken from BMW I3 Forum):

All modern BMW's require you to press the start button twice if you want to bypass the standby timer when stopping...the i3 is not unique in this. If you lock the car when getting out, it also shuts things down, but I don't lock mine when parked in my locked garage, so to prevent that extra bit of battery drain, I do the double-tap. I quickly became a habit, and I don't think about it any more.

Many cars require you to be pressing the brake to shift into gear, and some require it to start the car (think about a manual transmission vehicle...you'd want things set so that it couldn't roll once you engage the starter). Some do that by putting an interlock on the clutch pedal, but that can be problematic, too.

There are reasons why BMW did things the way they did...you may not like them, but there are logical reasons for them. Some of them can be tweaked if you want to try programming the car.

_________________
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV
 
#14 ·
Thanks Lexden, the information makes complete sense, I work for Land Rover and they are very similar. However, the fact still remains that my i3 leaves the 12v outlets powered for a considerable time even after a double press of the STOP button or alternatively locking the vehicle. And as previously stated, once the charger is plugged in (set to immediate charge at the moment as I'm using the brick rather than wall unit) the socket becomes live again restarting my Dash Cam which then records a static scene. I haven't had that patience, so far, to wait long enough to see if it subsequently shuts down or stays live through the whole charging cycle.

Don
 
#16 ·
Just a thought - and I have no idea about the answer - but on my F11, the computer would shut down all consumer electrics when the battery reached a certain charge. This happened to me when I was using a tyre inflator with the engine idling. Is there any such protection in the I3?