E90 Head unit shuts off after 10 seconds.

axeswingingflannelwearer · 01-25-2013, 08:20 PM

The other day I started my car and after 10 seconds the head unit shut off completely, no lights or sound. (non-idrive) It kept doing this all day every time I started the vehicles. The next day it worked all day, and then today it started out working fine and when I switched my headlights from automatic to on the radio switched off and wont turn on anymore...What do you think this could be? still have to check the fuses but if one blew wouldn't it just stay off completely? Thanks for your help.

axeswingingflannelwearer · 01-26-2013, 11:16 AM

Seriously? Nothing?

taibanl · 01-26-2013, 11:20 AM

How old os your battery?

ctuna · 01-26-2013, 11:57 AM

http://www.google.com/url?sa=t&rct=j...41524429,d.cGE

Read this , The IBS system can shut stuff down when the battery is low.
Its one possibility but not necessarily the only cause.

axeswingingflannelwearer · 01-26-2013, 12:10 PM

I'm not sure how old the battery is. That makes sense though, too much load.

axeswingingflannelwearer · 01-26-2013, 01:24 PM

All I know is that the battery is not oem, and the car is an 07. Radio is actually working today but not for long I a sure.

ctuna · 01-26-2013, 08:32 PM

Do you have a voltmeter?
Measure the voltage of the battery with the car not running then measure it
with car running . This will give you an idea of where that battery is at and also the battery may have a glass eye that indicates its condition.

axeswingingflannelwearer · 01-26-2013, 08:48 PM

Thanks I will try that out, I looked at the battery, no eye like the oem one.

01-25-2013, 08:20 PM	#1
axeswingingflannelwearer New Member 0 Rep 9 Posts Drives: 2007 328xi Black on Black Join Date: Dec 2012 Location: United States iTrader: (0)	E90 Head unit shuts off after 10 seconds. The other day I started my car and after 10 seconds the head unit shut off completely, no lights or sound. (non-idrive) It kept doing this all day every time I started the vehicles. The next day it worked all day, and then today it started out working fine and when I switched my headlights from automatic to on the radio switched off and wont turn on anymore...What do you think this could be? still have to check the fuses but if one blew wouldn't it just stay off completely? Thanks for your help.
	Appreciate 0 Tweet Quote

01-26-2013, 11:16 AM	#2
axeswingingflannelwearer New Member 0 Rep 9 Posts Drives: 2007 328xi Black on Black Join Date: Dec 2012 Location: United States iTrader: (0)	Seriously? Nothing?
	Appreciate 0 Quote

01-26-2013, 11:20 AM	#3
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	How old os your battery?
	Appreciate 0 Quote

01-26-2013, 11:57 AM	#4
ctuna Lieutenant General 2045 Rep 13,364 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	FYI http://www.google.com/url?sa=t&rct=j...41524429,d.cGE Read this , The IBS system can shut stuff down when the battery is low. Its one possibility but not necessarily the only cause.
	Appreciate 0 Quote

01-26-2013, 12:10 PM	#5
axeswingingflannelwearer New Member 0 Rep 9 Posts Drives: 2007 328xi Black on Black Join Date: Dec 2012 Location: United States iTrader: (0)	I'm not sure how old the battery is. That makes sense though, too much load.
	Appreciate 0 Quote

01-26-2013, 01:24 PM	#6
axeswingingflannelwearer New Member 0 Rep 9 Posts Drives: 2007 328xi Black on Black Join Date: Dec 2012 Location: United States iTrader: (0)	All I know is that the battery is not oem, and the car is an 07. Radio is actually working today but not for long I a sure.
	Appreciate 0 Quote

01-26-2013, 08:32 PM	#7
ctuna Lieutenant General 2045 Rep 13,364 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Do you have a voltmeter? Do you have a voltmeter? Measure the voltage of the battery with the car not running then measure it with car running . This will give you an idea of where that battery is at and also the battery may have a glass eye that indicates its condition.
	Appreciate 0 Quote

01-26-2013, 08:48 PM	#8
axeswingingflannelwearer New Member 0 Rep 9 Posts Drives: 2007 328xi Black on Black Join Date: Dec 2012 Location: United States iTrader: (0)	Thanks I will try that out, I looked at the battery, no eye like the oem one.
	Appreciate 0 Quote