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BMW Dynamic Stability Control Problem #2368870 09/06/11 10:24 AM
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exranger06 Offline OP
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My mom has a 2005 BMW 330ci convertible with only 13k miles on it. The other day she said some light came on the dash. I took a look and it's the light for the Dynamic Stability Control (DSC). The light for the parking brake is also on. According to the owner's manual, the light should come on if you turn the DSC off via the button on the dash. Pressing the button doesn't do anything. So that means there's a malfunction in the system. The car drives fine and has no odd symptoms. Where should I begin looking for the cause of this problem? Can anyone tell me which code readers/scanners can read BMW-specific DSC codes? This is NOT something the average $100 code reader can do.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2368884 09/06/11 10:39 AM
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Win Offline
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Is it still on the original battery?

In my experience, some European cars can be sensitive to voltage drop during cranking and set oddball faults if voltage drops too low, when there is nothing really wrong with the car.

Might try disconnecting the battery, give it a good charge, and reboot the car.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2368891 09/06/11 10:47 AM
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bdcardinal Online Content
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Check the battery, low voltage will do weird things. Also on some of the newer BMWs you have to have the PCM reprogrammed for a new battery due to the adaptive charging system.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2368894 09/06/11 10:50 AM
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Sounds like one of the ABS sensors might be malfunctioning. Also appears plenty of other E46 owners have the same issue:

http://forum.e46fanatics.com/showthread.php?t=697551

From what I've gleaned on that thread the brakes are wired in through the DSC system so she may just need a brake job.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2368915 09/06/11 11:09 AM
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exranger06 Offline OP
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I had the battery disconnected and removed from the car all winter long. I reinstalled it in the spring and the car drove fine all summer long, no reprogramming needed. Like I said, the car has only 13k miles and a lot of that is highway, so I highly doubt the brakes are shot, but I can check them anyway.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2368935 09/06/11 11:37 AM
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exranger06 Offline OP
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Oh yeah, the ABS light is NOT on, only the DSC and (parking) BRAKE light.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2369079 09/06/11 01:41 PM
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Is the BRAKE light yellow or red. Usually those two light only turn on when you disable the system by pressing the DSC switch; that combo is you turned it off. Did something get spilled on the switch?


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2369099 09/06/11 02:09 PM
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exranger06 Offline OP
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I don't remember what color it was. Like I said, pressing the button doesn't make it turn off. Nothing spilled on the button, food and drinks are not allowed within 10 feet of this car lol. It is absolutely mint (and SHOULDN'T be having any problems...)


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2369339 09/06/11 06:31 PM
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I'd make sure the battery is in good condition and then disconnect it for a period of 30 minutes, after you disconnect it put the key in the ignition and turn to start a few times to drain the capitance out of the electrical system. Then after 30 minutes reinstall the known GOOD battery. See what happens, get back to us.

I never heard of the ECU needing a reflash when the battery is disconnected, I tend to doubt that is accurate.

I do know it IS true with European cars that consistently low voltage or even slightly unstable voltage may cause symptoms like you mention, my own car, a VW will have alarm issues when the battery is not functioning correctly that would make you think it was system related.

Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2369379 09/06/11 07:14 PM
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Did a little more research. It seems it could either be a battery issue like some have said, or it's probably a sensor for the DSC system (ABS sensor, steering angle sensor, etc), or maybe the DSC module. I found out that there are pretty much no code readers/scanners that can read BMW-specific DSC codes, pretty much except AutoEnginuity, which is really expensive and requires a laptop which I don't have, so screw that. So I can try checking out the battery and cleaning the ABS sensors and hope that fixes the problem. If it doesn't, I'm off to the dealer for a good ol' fashioned butt-raping. eek


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2369393 09/06/11 07:26 PM
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Originally Posted By: exranger06
Did a little more research. It seems it could either be a battery issue like some have said, or it's probably a sensor for the DSC system (ABS sensor, steering angle sensor, etc), or maybe the DSC module. I found out that there are pretty much no code readers/scanners that can read BMW-specific DSC codes, pretty much except AutoEnginuity, which is really expensive and requires a laptop which I don't have, so screw that. So I can try checking out the battery and cleaning the ABS sensors and hope that fixes the problem. If it doesn't, I'm off to the dealer for a good ol' fashioned butt-raping. eek
Depending on the size of your city, you may have a place that is specialized in European cars only. You might be able to save money there.


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2369433 09/06/11 07:52 PM
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You need a Peake code reader.


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Re: BMW Dynamic Stability Control Problem [Re: OVERKILL] #2369516 09/06/11 08:44 PM
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exranger06 Offline OP
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Originally Posted By: OVERK1LL
You need a Peake code reader.

I thought the Peake doesn't do DSC codes? I'll have to lok into it again


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Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2370086 09/07/11 12:27 PM
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exranger06 Offline OP
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Just thought of something: If the problem had to do with dirt/debris on the ABS sensors, the ABS light should be on too right? Like I said before, the ABS light is NOT on. So I don't think I should even bother cleaning the sensors.


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1992 Honda Accord EX
2013 Toyota Sienna XLE AWD
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
Re: BMW Dynamic Stability Control Problem [Re: exranger06] #2370108 09/07/11 12:40 PM
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exranger06 Offline OP
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Originally Posted By: exranger06
Originally Posted By: OVERK1LL
You need a Peake code reader.

I thought the Peake doesn't do DSC codes? I'll have to lok into it again

I just emailed Peake customer service. They said their readers do NOT read DSC codes.


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