Multiple failure indicated

dumaurier7 · Post by **dumaurier7** » Tue Oct 31, 2023 11:42 pm

Yes it was.

B21 · Post by **B21** » Tue Oct 31, 2023 11:51 pm

dumaurier7 wrote: ↑Tue Oct 31, 2023 11:42 pm Yes it was.

So what codes are you getting? What code reader are you using?

dumaurier7 · Post by **dumaurier7** » Tue Oct 31, 2023 11:57 pm

I am using Bimmer Greks on my tablet, before the event starts there are no codes then BOOM! It goes into CRAZY mode the wipers turn on and everything starts throwing codes and turning on the all the warning lights .

B21 · Post by **B21** » Wed Nov 01, 2023 12:06 am

Seems like a can bus related event…

https://www.youtube.com/watch?v=E5lsGcQxebs

dumaurier7 · Post by **dumaurier7** » Wed Nov 01, 2023 12:08 am

Yep! I’m thinking the same, will be taking it to a BMW specialist to get this sorted once and for all.

dumaurier7 · Post by **dumaurier7** » Wed Nov 01, 2023 3:35 pm

I have not had the issue since recently swapped out the battery for the brand new one (shown below), however, I three issues still persist.
1. My A/C is nonfunctional, everything is throwing a fault in the system!

AC module was defective! same replaced now all is good.

2. The exterior lights (head, park and third) occasionally remain on.
3. The trunk does not unlock with the key fob anymore.

CAS module was defective had a replacement coded and installed now all is good again.

Seems like the initial battery failure did cause a lot of electrical damage.

dumaurier7 · Post by **dumaurier7** » Sun Nov 05, 2023 2:38 pm

The Zed Shed wrote: ↑Sat Jul 03, 2021 3:26 pm The wipers staying on is a good indicator here.

Abs modules fail, causing garbage signals to be poured into the canbus, hence modules cannot talk to each other. PT-can is not affected, hence no limp mode.

Mike

Hi all! Seems like this diagnosis is correct! The indept scan shows that during the event the ABS module is not communicating at all, and according to the Technician, the reason for the intermittent behavior could be heat related. For now, I will try sticking some heat insulation on the cover of the module while I wait on a replacement.

dumaurier7 · Post by **dumaurier7** » Tue Nov 07, 2023 11:55 am

Update time! whilst waiting for a replacement I pulled the module (which is in like new condition!) off, gave the board and connector a good spray with CRC contact cleaner and I stuck some nice'n heavy heat insulation to the black cover before putting it all back together, it's been two days now with no unwanted driving experiences!

dumaurier7 · Post by **dumaurier7** » Fri Dec 15, 2023 11:41 am

Finally was able to swap out this module, I now have no warning lights and the car behaves normally now! I think (HOPE and PRAY!

) that this is the final solution!

B21 · Post by **B21** » Fri Dec 15, 2023 2:31 pm

dumaurier7 wrote: ↑Fri Dec 15, 2023 11:41 am Finally was able to swap out this module, I now have no warning lights and the car behaves normally now! I think (HOPE and PRAY! ) that this is the final solution!

Good to have the update

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