Auto headlights work... And then they don't.

TexE90 · 02-15-2013, 04:45 PM

Need some help diagnosing this problem...

Sometimes my auto headlights work perfectly. They turn off during the day, they turn on at night, and the adaptive feature works.

Sometimes they don't work all that perfect. They are stuck on and the adaptive feature does not work at all. The headlights are pointed straight 100% of the time and on 100% of the time.

I haven't been able to figure out if there is a certain set of circumstances that cause it. Thus far it appears to be fairly random.

Where do I even start to diagnose this? If this is a light sensor issue, why does the adaptive feature stop working? Could it be a malfunction of the headlight control module and the default busted state is "stuck on" (which I guess I'm pretty thankful it's not "stuck off")?

Edit: 2007 335i 4dr

///Mposter · 02-16-2013, 01:13 PM

Battery low? My angel eyes stopped coming on during unlocking. I've read in here that it starts to cut off functions as the battery goes. You have an 07 so that's quite some time.

TexE90 · 02-17-2013, 12:11 PM

Short of buying a new battery, any way to test this out? My TPMS also randomly malfunctions so I wonder if the two are interrelated.

idrift4wd · 02-17-2013, 12:25 PM

jw, your 100% positive that they dont work on auto setting? cause if you switch the light all the way to the right, adaptive headlights are not active.

plus it should throw a code if they do fail

TexE90 · 02-17-2013, 05:40 PM

Selector is all the way to the left. Pretty much stays that way all the time. Not seeing any codes through the JB4.

TexE90 · 02-18-2013, 09:31 AM

Anyone else? Heeeeeelp.

BoostedE90 · 02-18-2013, 11:45 AM

Do you have any other electrical issues?

Have you seen this? http://www.e90post.com/forums/showthread.php?t=804545

Wei718 · 02-18-2013, 12:00 PM

Op, do you have any aftermarket lighting installed like HID fogs?

TexE90 · 02-18-2013, 04:36 PM

I have Lux angel eyes, otherwise stock. This was happening before I installed them though.

TexE90 · 02-18-2013, 04:37 PM

Quote:

Originally Posted by BoostedE90

Do you have any other electrical issues?

Have you seen this? http://www.e90post.com/forums/showthread.php?t=804545

I haven't seen that yet, thanks for the heads up. I'll take my car in to get that resolved at least.

02-15-2013, 04:45 PM	#1
TexE90 Banned 12 Rep 134 Posts Drives: 2007 335i E90 Join Date: Nov 2012 Location: United States iTrader: (1)	Auto headlights work... And then they don't. Need some help diagnosing this problem... Sometimes my auto headlights work perfectly. They turn off during the day, they turn on at night, and the adaptive feature works. Sometimes they don't work all that perfect. They are stuck on and the adaptive feature does not work at all. The headlights are pointed straight 100% of the time and on 100% of the time. I haven't been able to figure out if there is a certain set of circumstances that cause it. Thus far it appears to be fairly random. Where do I even start to diagnose this? If this is a light sensor issue, why does the adaptive feature stop working? Could it be a malfunction of the headlight control module and the default busted state is "stuck on" (which I guess I'm pretty thankful it's not "stuck off")? Edit: 2007 335i 4dr Last edited by TexE90; 02-15-2013 at 04:50 PM..
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02-16-2013, 01:13 PM	#2
///Mposter Macgyver 213 Rep 942 Posts Drives: 2007 e92 335i Join Date: Jun 2011 Location: Greensboring iTrader: (0)	Battery low? My angel eyes stopped coming on during unlocking. I've read in here that it starts to cut off functions as the battery goes. You have an 07 so that's quite some time. __________________ GTX3076R , ADV, JB4, FMIC, BOV, 17"APEX, 255/40/17 SQ, 6-SPD Manual
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02-17-2013, 12:11 PM	#3
TexE90 Banned 12 Rep 134 Posts Drives: 2007 335i E90 Join Date: Nov 2012 Location: United States iTrader: (1)	Short of buying a new battery, any way to test this out? My TPMS also randomly malfunctions so I wonder if the two are interrelated.
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02-17-2013, 12:25 PM	#4
idrift4wd Brigadier General 151 Rep 3,549 Posts Drives: Three Hundred and Thirty Five Join Date: Jul 2010 Location: Yonkers NY iTrader: (0) Garage List 2007 BMW [7.00]	jw, your 100% positive that they dont work on auto setting? cause if you switch the light all the way to the right, adaptive headlights are not active. plus it should throw a code if they do fail
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02-17-2013, 05:40 PM	#5
TexE90 Banned 12 Rep 134 Posts Drives: 2007 335i E90 Join Date: Nov 2012 Location: United States iTrader: (1)	Selector is all the way to the left. Pretty much stays that way all the time. Not seeing any codes through the JB4.
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02-18-2013, 09:31 AM	#6
TexE90 Banned 12 Rep 134 Posts Drives: 2007 335i E90 Join Date: Nov 2012 Location: United States iTrader: (1)	Anyone else? Heeeeeelp.
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02-18-2013, 11:45 AM	#7
BoostedE90 Lieutenant Colonel 60 Rep 1,690 Posts Drives: e90 335i 6MT Join Date: Nov 2007 Location: Tampa/Gainesville, FL iTrader: (5)	Do you have any other electrical issues? Have you seen this? http://www.e90post.com/forums/showthread.php?t=804545
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02-18-2013, 12:00 PM	#8
Wei718 Major 340 Rep 1,089 Posts Drives: 718 GT4 Join Date: Nov 2012 Location: Hayward iTrader: (9)	Op, do you have any aftermarket lighting installed like HID fogs?
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02-18-2013, 04:36 PM	#9
TexE90 Banned 12 Rep 134 Posts Drives: 2007 335i E90 Join Date: Nov 2012 Location: United States iTrader: (1)	I have Lux angel eyes, otherwise stock. This was happening before I installed them though.
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