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  #1  
Old 03-15-2024, 02:00 AM
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SRS Module Swap, still getting shadow codes that won't clear

Hello all,



Looking for some help with an airbag module swap issue. My SRS module was throwing a (240) internal control fault, so I bought a used SRS module to swap out, same part number and version number of my X5. The swap was actually a piece of cake after watching a quick video. The issue I'm having is that I'm coming up with the almost the same codes from before, but its showing that the Internal control unit fault is a shadow error, and not live, same with all the rest of them. The live data shows that everything is in order, besides the seat mat sensor. I cannot clear these codes, using BMW scanner, or INPA. When trying to clear the codes in INPA, it simply says "ERROR_ECU_REJECTED. I'm aware there is an issue with the seat occupancy recognition mat in the passenger seat, and you can see that from the pic below.


I do believe i bought a bad used module, and that now i need to send off the original to get it wiped clean, and reinstall it to see if those shadow errors are gone. I understand that if i dont fix the mat issue, it will continue to still show the airbag light on the dash and store the error with for the mat sensor. Is there an option for me to simply code out the seat sensor, and if i do so, would i just unplug the SBE control unit under the seat? Any help would be appreciated. Thanks!
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Last edited by chasers36; 03-15-2024 at 02:06 AM. Reason: Adding info
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  #2  
Old 03-15-2024, 07:50 AM
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You can try an emulator to bypass the seat sensor, but I have been told that some airbag errors will not clear as it is a way for someone to know if an airbag had functioned and been replaced.

The other thing is the little plastic bar inside the clip gets broken and sends an error. Some of the guys here have replaced that piece with a little sliver of a credit card, but I have not had this problem myself.

PS. Airbags can throw a code if it was unplugged while the battery was connected so be careful about that.

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Old 03-15-2024, 09:12 AM
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easy-peasy: seat sensor bypass emulator

Quote:
Originally Posted by EODguy View Post
You can try an emulator to bypass the seat sensor, but I have been told that some airbag errors will not clear as it is a way for someone to know if an airbag had functioned and been replaced....
I had a faulty passenger seat sensor that kept setting codes, so I bought a "Seat occupancy mat Tester bypass for BMW" off of Ebay awhile back. https://www.ebay.com/itm/Seat-occupa...-127632-2357-0

It did the trick https://xoutpost.com/bmw-sav-forums/...ight-dash.html, but it is advertised to work on X5's thru 2004, only. Here's a link to an emulator that'll work on all E53 and E70's:https://www.ebay.com/itm/325409883733

For about $20, why not give one a shot?
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Old 03-15-2024, 09:33 AM
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Those 6900727 airbag modules (used up to 4/2001) are notorious to cause problems. The internal chip gets corrupted showing internal fault and none of the active codes can be reset. The module can be repaired but but it needs to be done on a bench programming the chip.
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Old 03-15-2024, 04:01 PM
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Thank you for the replies. I have gone ahead and ordered the seat sensor bypass, and i have shipped my original SRS off to be bench programmed. Was really hoping i wouldnt have to deal with sending the original off to get fixed, but since this used one is no good and installed, i guess it gave me the opportunity to send off the original to get fixed, and 20 bucks to temporarily solve my seat mat issue is alright by me. I will update once i get the original back and installed.
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Old 03-15-2024, 04:04 PM
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Quote:
Originally Posted by EODguy View Post
You can try an emulator to bypass the seat sensor, but I have been told that some airbag errors will not clear as it is a way for someone to know if an airbag had functioned and been replaced.

The other thing is the little plastic bar inside the clip gets broken and sends an error. Some of the guys here have replaced that piece with a little sliver of a credit card, but I have not had this problem myself.

PS. Airbags can throw a code if it was unplugged while the battery was connected so be careful about that.

Sent from Embassy network using Tapatalk

Not sure what clip you're referring to, are you talking about a clip on the seat sensor mat itself, or the little SBE control unit under the passenger seat?
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Old 03-15-2024, 04:06 PM
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Quote:
Originally Posted by chasers36 View Post
Not sure what clip you're referring to, are you talking about a clip on the seat sensor mat itself, or the little SBE control unit under the passenger seat?
The airbag wiring connector.

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Old 03-25-2024, 03:34 AM
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Back at it again, with no luck.


I got the repaired module back, and the bypass as well, hooked everything up, cleared the codes, all of the errors cleared EXCEPT the passenger occupancy error, even the old internal control fault cleared! But then when i disconnected the passenger bypass and reprogrammed it to not have the seat occupancy,which said it wrote to the unit fine, i scanned again, and the internal control fault showed right back up when i went to scan for errors again, along with the same passenger occupancy error! So, i've narrowed it down to the little black SBE box that may be causing my issue for the occupancy sensor. I unplugged it completely, and rescanned, and now it showing 4 SBE errors, but they're all yellow, and not present!


But now im back at square one, the unit has F0 internal control fault again, and the errors will not clear. How can these brick THAT easy?!?! When i did the first clear, I did not start the vehicle fully, i had only turned it to position 2, and the codes cleared fine, but after leaving it on for several minutes trying to figure out why it still showed the occupancy error even with the bypass plugged in, my batter voltage dropped to around 11.6V. Can anything under 12V cause these to just brick? I do have the second module that i can ship off and have them clear again, and try to do this again while the vehicle is started, and make sure that its above 12V when i clear everything. Quite frustrating this is!
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Last edited by chasers36; 03-25-2024 at 04:18 AM.
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Old 03-25-2024, 09:46 AM
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If you use a bypass, the seat belt needs to be buckled. I have a buckle insert in my passenger side OEM buckle. The air bag will deploy even if no one is sitting the passenger side. Buckle the seat shoulder belts and rescan.
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Old 03-25-2024, 12:32 PM
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Quote:
Originally Posted by Clavurion View Post
Those 6900727 airbag modules (used up to 4/2001) are notorious to cause problems. The internal chip gets corrupted showing internal fault and none of the active codes can be reset. The module can be repaired but but it needs to be done on a bench programming the chip.
Quote:
Originally Posted by X5chemist
If you use a bypass, the seat belt needs to be buckled. I have a buckle insert in my passenger side OEM buckle. The air bag will deploy even if no one is sitting the passenger side. Buckle the seat shoulder belts and rescan.
chasers36-When was your X5 built? My '01 X5 was built in 7/2001, after the 4/2001 date given by Clavurion, so maybe that's why the seat mat bypass worked on it, and no airbag warning has since reappeared on my dash
Quote:
Originally Posted by workingonit
I started up the Foxwell NT510 E to clear the seat/airbag code, and there was no buzzer or alarm, so I didn't need the jumper, nor the false seatbelt plug I have. The light is now gone from the dash.
You've tried BMW Scanner 1.4 and INPA so far, but they didn't clear the fault code, so maybe it'd be worthwhile to get a Foxwell NTxx model (I suggest the NT710, or a cheaper one, the NT510 Elite, like mine). Even if it will not clear your code, maybe it would help you out as a proven bi-directional scan tool you can carry in the glovebox, as EODguy does.
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topas-blau,Leder-grau,"resto-project car"

Here:
14 Lexus ES350,3.5L-U660E
09 HHR Panel,2.2L-4T45E
04 Chevy 2500HD,6.0L-4L80E
98 GMC Sierra 1500,5.7L-4L60E

Gone:
66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake
08 Cobalt Coupe,2.2L-4T45E
69 & 75 C10s,350c.i.-TH350
86 S10,2.8L-700R4
73 Volvo 142,2.0L-MT4
72 & 73 VW SuperBeetles,1.6l-MT4
64 VW,1.2l-MT4
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56 Chevy 210 4dr,265c.i.-PGlide
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