E90 ELV lock tripped, fixed, but now no power to speakers/amp! Help!

Daousti · 12-12-2020, 09:06 PM

Quick background. 2006 e90 325i. Logic 7. 130km. AT. New battery (2 months ago), and registered. Non iDrive. No Bluetooth. No TCU. No SAT. No SOS issues like others allude to. Not water related.

No issues whatsoever prior to this, but had car parked in heated garage, came out one evening to head off, and got the yellow ELV signal. Car wouldnt start, steering wheel was locked. Tried many things over a period of 2 days, including resetting ELV counter with tool32, but nothing. Ended up taking out steering column and resetting ELV lock manually. Once done, car fired up flawlessly. Ordered an emulator so i never have to do that again. I still dont know what caused this, possibly a short somewhere??

Problem is, I now have no power going to my factory amp, so no sound from speakers! I still get the start chime, but no speaker sounds. I know the factory amp is getting no power because I have a LOC w/ REM wired to the power inputs of the factory amp that are used for an aftermarket sub amp, which is getting no power. I've checked every fuse in the box at this point (all are fine), and have skimmed many manuals on the MOST to figure this out, but still dont know why i have no power to my amp.

Assuming the fuses are good, does anyone have any idea of why the factory amp might not be getting power? Thanks for any and all direction...

ctuna · 12-12-2020, 10:31 PM

You probably left the Most Test point under the Steering wheel kick panel unplugged
or pulled the Fiberoptic out of the Back of your Head Unit.
(Or damaged or pinched wiring and cables)

The ELV problem is due to the cheap ass Lock Mechanism in the steering column
getting dirty or wearing out.
It's a mechanical not an electrical problem.
https://www.e90post.com/forums/showt...&highlight=elv

06's have a separate speaker for chimes.
It may or may not be hooked up depending on the car configuration

Most test point
http://www.e90post.com/forums/showthread.php?t=347222
If this is disconnected is will usually be accompanied by and SOS failure if
you have SOS which most cars do.

Logic 7
https://www.e90post.com/forums/showthread.php?t=1056432
http://www.bmwlogicseven.com/?p=3837
http://www.bmwgm5.com/
https://www.e90post.com/forums/showt...5#post24455335
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.google.fr/url?sa=t&rct=j&...slMu2A&cad=rjt
https://www.bmwgm5.com/Logic7_E90_91_92_93.htm
http://www.bimmerfest.com/forums/sho...d.php?t=982666

http://www.e90post.com/forums/attach...1&d=1209780605
Most
http://www.e90post.com/forums/showthread.php?t=727663
http://www.e90post.com/forums/showthread.php?t=347222
https://www.google.com/search?q=BMW+...VCkMqy2aCK09M:
http://www.1addicts.com/forums/showt...php?p=19256760
https://www.teacremotes.com/bmwgm5/
Diagnostic Manuals Inpa/Ista D
https://bimmerprofs.com/diagnostics-inpa-part-1/
https://www.google.com/url?sa=t&rct=...7x8H3pN8h1fMuF
https://carmod.ru/files/icom/istad_en.pdf
https://www.e90post.com/forums/showthread.php?t=1681573
https://www.bimmerforums.com/forum/s...-P-actually-do
primary links
https://www.bimmerfest.com/forums/at...9&d=1539905743
https://www.e90post.com/forums/showthread.php?t=1681573
https://www.bimmerfest.com/forums/at...1&d=1590283589
https://www.nathansbmwworkshop.com/b...or-dean-videos

Also there is a Fuse for the amp in the Cabin Fuse Panel.
However disconnection seems more likely and always check the
battery voltage before troubleshooting anything .
Battery might be New but you can deplete if working on the car for a long
time unless it's disconnected.

Daousti · 12-12-2020, 11:16 PM

First and foremost, ctuna, you are a badass and want to thank you for helping so many people. Please don't stop doing what you do. Like I said, ive read a ton of posts at this point, and you're consistently in every thread.

You've given me a lot to go through, about half of which I've already seen in yours and others previous posts. I will double check my footwell connections again tomorrow, but didnt have to disconnect anything there when replacing the steering column; I have no BT, no speaker under the steering wheel, only a footwell light. Only things that were disconnected related to the ELV and key area (and foot light). Possible something got pulled behind the HU, but even if that was the case, the amp should still be getting power, just no fiber signal?

I will also try to look into INPA tomorrow too - might find something there.

I think there must have been a short because it seems too coincidental that my ELV and speakers go at the same time. Dash battery voltage showed 12.2 at resting state, not great, not bad.

If it's not a fuse, do we know what else might prevent power from going to the amp? I can imagine this is a solved problem 16 years later! Again, any additional direction appreciated!

Daousti · 12-13-2020, 11:22 AM

Digging deeper, I connected to INPA. Radio connection was fine, showing no fault codes, however when trying to connect to amp, it would not respond (no power, as expected). Interestingly, the CCC was also no responding. Not exactly sure how these are related, but hopefully diagnosing whether the CCC is the issue will yield some results...

Edit: nevermind this comment, my car is non Nav, so doesnt have CCC, hence no response. Just Rad2 which is fine.

ctuna · 12-13-2020, 11:24 AM

If the battery is to low and yours is kinda of low the IBS system can turn
stuff off that is deems unnecessary to keep the car running.

(THAT IS WHY you always want a full charge on the battery before working on
the car) or you will get ghost problems

See IBS explanation in the first link.

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

There are Status Led's in the L7 amp that tell if there is power there and if it is communicating properly.
The first thing in the Handy Links should help if it still can be downloaded.

http://www.bmwlogicseven.com/?p=3837

Daousti · 12-13-2020, 11:29 AM

Quote:

Originally Posted by ctuna

If the battery is to low and yours is kinda of low the IBS system an turn
stuff off that is deems unnecessary to keep the car running.

See IBS explanation in the first link.

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

Once again thx for the response.

Took it out on a big drive this morning, voltage back to 12.9 resting. Tried disconnecting/reconnecting the IBS, all combinations, still no power to the amp. Going through those guides, speakers/amp/hu are not something the IBS shuts down? At least not according to what is listed in those linked manuals. Even still, after a 30min highway drive and 30 minutes in the city, battery should have enough juice that this shouldnt be issue. Not sure how to progress at this point...

ctuna · 12-13-2020, 11:35 AM

Bentley Manual has Fuse charts and I suppose this worked before.
Basics follow the voltage from Fuse Box out.

12-12-2020, 09:06 PM	#1
Daousti New Member 0 Rep 5 Posts Drives: 325i Join Date: Dec 2020 Location: Canada iTrader: (0)	E90 ELV lock tripped, fixed, but now no power to speakers/amp! Help! Quick background. 2006 e90 325i. Logic 7. 130km. AT. New battery (2 months ago), and registered. Non iDrive. No Bluetooth. No TCU. No SAT. No SOS issues like others allude to. Not water related. No issues whatsoever prior to this, but had car parked in heated garage, came out one evening to head off, and got the yellow ELV signal. Car wouldnt start, steering wheel was locked. Tried many things over a period of 2 days, including resetting ELV counter with tool32, but nothing. Ended up taking out steering column and resetting ELV lock manually. Once done, car fired up flawlessly. Ordered an emulator so i never have to do that again. I still dont know what caused this, possibly a short somewhere?? Problem is, I now have no power going to my factory amp, so no sound from speakers! I still get the start chime, but no speaker sounds. I know the factory amp is getting no power because I have a LOC w/ REM wired to the power inputs of the factory amp that are used for an aftermarket sub amp, which is getting no power. I've checked every fuse in the box at this point (all are fine), and have skimmed many manuals on the MOST to figure this out, but still dont know why i have no power to my amp. Assuming the fuses are good, does anyone have any idea of why the factory amp might not be getting power? Thanks for any and all direction... Last edited by Daousti; 12-12-2020 at 11:49 PM..
	Appreciate 0 Tweet Quote

12-12-2020, 11:16 PM	#3
Daousti New Member 0 Rep 5 Posts Drives: 325i Join Date: Dec 2020 Location: Canada iTrader: (0)	First and foremost, ctuna, you are a badass and want to thank you for helping so many people. Please don't stop doing what you do. Like I said, ive read a ton of posts at this point, and you're consistently in every thread. You've given me a lot to go through, about half of which I've already seen in yours and others previous posts. I will double check my footwell connections again tomorrow, but didnt have to disconnect anything there when replacing the steering column; I have no BT, no speaker under the steering wheel, only a footwell light. Only things that were disconnected related to the ELV and key area (and foot light). Possible something got pulled behind the HU, but even if that was the case, the amp should still be getting power, just no fiber signal? I will also try to look into INPA tomorrow too - might find something there. I think there must have been a short because it seems too coincidental that my ELV and speakers go at the same time. Dash battery voltage showed 12.2 at resting state, not great, not bad. If it's not a fuse, do we know what else might prevent power from going to the amp? I can imagine this is a solved problem 16 years later! Again, any additional direction appreciated! Last edited by Daousti; 12-13-2020 at 12:14 AM..
	Appreciate 0 Quote

12-13-2020, 11:22 AM	#4
Daousti New Member 0 Rep 5 Posts Drives: 325i Join Date: Dec 2020 Location: Canada iTrader: (0)	Digging deeper, I connected to INPA. Radio connection was fine, showing no fault codes, however when trying to connect to amp, it would not respond (no power, as expected). Interestingly, the CCC was also no responding. Not exactly sure how these are related, but hopefully diagnosing whether the CCC is the issue will yield some results... Edit: nevermind this comment, my car is non Nav, so doesnt have CCC, hence no response. Just Rad2 which is fine. Last edited by Daousti; 12-13-2020 at 11:34 AM..
	Appreciate 0 Quote

12-13-2020, 11:24 AM	#5
ctuna Lieutenant General 1911 Rep 13,100 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	If the battery is to low and yours is kinda of low the IBS system can turn stuff off that is deems unnecessary to keep the car running. (THAT IS WHY you always want a full charge on the battery before working on the car) or you will get ghost problems See IBS explanation in the first link. electical e90 pdf http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja http://www.google.com/url?sa=t&rct=j...85464276,d.cGU http://www.google.com/url?sa=t&rct=j...85464276,d.cGU There are Status Led's in the L7 amp that tell if there is power there and if it is communicating properly. The first thing in the Handy Links should help if it still can be downloaded. http://www.bmwlogicseven.com/?p=3837 Last edited by ctuna; 12-13-2020 at 11:33 AM..
	Appreciate 0 Quote

12-13-2020, 11:35 AM	#7
ctuna Lieutenant General 1911 Rep 13,100 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Bentley Manual has Fuse charts and I suppose this worked before. Basics follow the voltage from Fuse Box out.
	Appreciate 0 Quote