2012 Focus Titanium "Low Battery see Owner's Manual" after 20 Minutes of Stereo on - Page 2 - Focus Fanatics
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Old 05-18-2013, 03:35 PM   #11
Bolto
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Quote:
Originally Posted by babaei View Post
I don't think it's a true accessory mode, if it's running the fan, headlights, etc. It's basically turning the ignition "on" without cranking the engine (equivalent to position II with the key).

I think the OP just wants the stereo (what accessory mode should be), and I think you can turn that on separately without powering up all the other stuff (which will make the battery last considerably longer).
Great tip babaei; I just went to my car and tried using just the stereo power button to turn it on and viola, it worked! I never knew that and have always used the start button to turn on the stereo when I didn't want the engine running.

I'm now curious if the manual mentions this...
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Old 05-18-2013, 04:01 PM   #12
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The US/Canada owner's manual is vague about this, and I'm a little disappointed about how poorly organized it is. The UK manual for the 2013 Focus is much better written and clearer about this particular subject:

ON/OFF CONTROL
Press the button with the ignition switched
off. This will operate the audio unit for up
to one hour.

If you switch the audio unit on before you
switch the ignition off, the audio unit will
switch off automatically after 10 minutes
or when you open one of the front doors.
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Old 05-18-2013, 05:23 PM   #13
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Well I think the blower might have been on for the 20 minutes time it happened. I know it wasn't for the 40 minutes time. My old car the montero had no leds (all the interior lights on the focus are leds so they use no power, and im sure everything was less efficient. It also had a more powerful subwoofer (and better sound system IMO from a quality stand point lol). I can't imagine MFT would suck up that much juice or if it does the designers did a terrible job. I can run my laptop for 4 hours and it has a 16 inch screen, oodles more processing power, and is used to do more than just display the timer for some music. I'll start that car in test mode as was suggested to check if it is a battery issue (didn't know that even existed). I kinda hope it is and hope it isnt at the same time, I hope it is because 40 minutes just listening to music off battery is pretty laughable, but also the dealers near me suck and are 0 help so for that I hope it isn't an issue. I'll let you know what I find out from test mode.

EDIT: I'm thinking there isn't a problem with the battery...
When I entered test mode with the car in ACC mode it read 11.9, with the car on and engine running it read 14.3

I guess it is what it is and the Focus in ACC mode is just terrible inefficient. I'll try the mode with everything off except MFT when I get some time to see if i get more than 40 minutes when I get a chance. Thanks!
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Old 05-18-2013, 08:31 PM   #14
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When I entered test mode with the car in ACC mode it read 11.9, with the car on and engine running it read 14.3
I may be wrong but that (11.9) under light load seems low to me. The 14.3 seems like a high charge rate, I would expect 13.8 while charging a good battery that was not really drained.
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Old 05-18-2013, 10:24 PM   #15
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Originally Posted by Ox-y-GenIII View Post
Start your car in Test Mode by holding the left 'OK' button for a few seconds and then while still holding the button start the car and continue to hold for another few seconds. Once test mode displays on the screen between the guages, use the up or down arrow to navigate to the battery volts screen. If its below 12 that's an issue with a bad battery or faulty alternator. I think mine is actually always around 13 volts which seems a little high actually.
The battery voltage (engine running) is typically about 14 in most modern cars. A fully charged 6 cell battery is 12.6V (engine off).
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Old 05-19-2013, 09:25 AM   #16
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Originally Posted by Kabigon View Post
The battery voltage (engine running) is typically about 14 in most modern cars. A fully charged 6 cell battery is 12.6V (engine off).
Funny you say that... I found this link: http://www.autobatteries.com/basics/voltage1.asp

So, my battery is broken?
I should be sitting at 12.6, not 11.9?
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Old 05-19-2013, 09:56 AM   #17
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Make sure you test your battery after it's been fully charged; i.e.-after having driven it around for 30 minutes. After you park and shut it off, let it sit for about 10 mins completely off before testing. If you're still reading that low, I would be looking at replacement.
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Old 05-19-2013, 10:23 AM   #18
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Make sure you test your battery after it's been fully charged; i.e.-after having driven it around for 30 minutes. After you park and shut it off, let it sit for about 10 mins completely off before testing. If you're still reading that low, I would be looking at replacement.
Is it alright if the test is done after longer than 10 minutes of off?
I should hope my car isn't discharging that quickly with everything off.

I'll run the test again today, car is obviously still in warranty (950 miles on it) but September 2011 build date presumably sitting outside in New Hampshire since then means that battery would have experienced some pretty varied temperature swings.
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Old 05-19-2013, 10:43 AM   #19
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Yes, you can wait longer than 10 minutes. The problem with doing it much sooner is that batteries get charged over 12.6v when driving, and they have to dissipate some of that energy and stabilize after a drive.
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Old 05-19-2013, 02:43 PM   #20
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Yes, you can wait longer than 10 minutes. The problem with doing it much sooner is that batteries get charged over 12.6v when driving, and they have to dissipate some of that energy and stabilize after a drive.
Testing it after about 30 minutes of driving and waited 10 minutes before testing it. It read a 12.0

Not that it makes a difference but if I apply the brakes (with the engine off and in test mode) the 12 drops to 11.9, I guess it makes sense since the draw is increasing.

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