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      07-19-2014, 03:56 PM   #1
mikep
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Error Code 5E34

Hello friends,

I've been living with this DSC Malfunction: Start off Assistance Inactive! error message for over 2 years now since it doesn't seem to have any effect on anything other than an annoying light. I finally ordered the Bavarian Technic cable this week which spit out the error code:

5E34
DSC: Control module: longitudinal-acceleration sensor
Error will cause a warning light
Error is currently present
Test conditions have been completed

Is this a problem with the speed sensor (PN 34 52 6 781 575)? Does anyone have a diagram of where this is? I've read it may be under one of the seats.

Number 11 in the diagram



I'm reasonably handy and plan to replace myself but any info you may have will be really helpful. I also plan to create a DIY to post here as I couldn't find one for this problem.

Thanks!

- Mike

Last edited by mikep; 09-11-2014 at 10:47 AM.
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      09-11-2014, 10:46 AM   #2
mikep
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any love on where this thing is located? The new sensor arrived today. Under the seat?
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      09-11-2014, 01:22 PM   #3
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"Longitiudinal acceleration" implies a G-meter, not necessarily anything to do with speed. There are low-cost ICs that measure g-forces that are commonly used in many consumer devices these days. It appears that BMW utilizes lateral G's in combination with other factors to apply its Dynamic Stability Controls, similar to what most other vehicle stability controls are doing. Doesn't mean you've picked the wrong sensor, but I would expect it to be called an acceleration sensor rather than a speed sensor. There is also an "accelerating sensor" used for airbag deployments (to confuse matters more!).

Last edited by Beemdog; 09-11-2014 at 01:35 PM.
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      09-17-2014, 08:37 PM   #4
mikep
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can anyone confirm if this speed sensor is under one of the seats, or point me in the right direction?

thanks.
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      Yesterday, 12:47 PM   #5
lve2xlr8
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This feature is what keeps your car from rolling back after you let go of the brake on an incline. Not sure where it's at or if that's the item that needs to be replaced.

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