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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Feb-15-2019, 12:08:51 AM   #11
t3ddftw
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Default Re: Persistant Electrical Issues

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Originally Posted by BimmerDreamer View Post
Update for all who are experiencing a similar issue (I have read easily 20 posts with no solution, so I will try to leave you with the best answer I come up with)

I have now tried removing the Fuse 7 and 41 at the same time as well as the 10amp in the sat nav tuner. This leads me to an interesting discovery. When I fiddle with the wires in the Bm54 (I believe that is the correct module name but not entirely sure), the sound cuts in and out. I cleaned up the contacts and the problem persists. I removed the bottom two segments of that plug, which have a base white wire and multicoloured stripes on a white plug, and the one next to it which is black and the same size.

I am looking into solutions involving the Bm54. Stay tuned (bad tuner pun)
The BM53 is the U.S. model and the BM54 is the EU model . The only difference is that the 54 has TMC which is some kind of public traffic monitoring service.

Anyways, what's the condition of the wires? Anything look like it's worn through? It could be possible that the module itself is going. If you want to borrow the BM53 from my bench setup, shoot me a PM.
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Old Sun, Feb-17-2019, 12:28:28 AM   #12
RedM3/4
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Default Re: Persistant Electrical Issues

I'd find the dice unit, it is notorious as others have mentioned.

ADS
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Old Sat, Feb-23-2019, 06:21:10 PM   #13
BimmerDreamer
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Default Re: Persistant Electrical Issues

Quote:
Originally Posted by t3ddftw View Post
The BM53 is the U.S. model and the BM54 is the EU model . The only difference is that the 54 has TMC which is some kind of public traffic monitoring service.

Anyways, what's the condition of the wires? Anything look like it's worn through? It could be possible that the module itself is going. If you want to borrow the BM53 from my bench setup, shoot me a PM.

I ordered a BM 53 off of ebay that looked to be in good shape and said it was tested, but who really knows, and all I got was fuzz. I may take you up on that offer^ That is very kind

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Originally Posted by RedM3/4 View Post
I'd find the dice unit, it is notorious as others have mentioned.


ADS
Found it and disconnected. My whole car is pulled apart and it is my daily
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Old Thu, Feb-28-2019, 07:39:54 PM   #14
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Default Re: Persistant Electrical Issues

Is there a difference between Navigation models and Business Radio models when it comes to a BM53? I have a convertible. Does that make a difference?
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Old Thu, Feb-28-2019, 08:06:33 PM   #15
t3ddftw
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Default Re: Persistant Electrical Issues

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Is there a difference between Navigation models and Business Radio models when it comes to a BM53? I have a convertible. Does that make a difference?
The Business Radio models don't have a BM53 whatsoever, since the HU itself does all that work. The convertibles don't have different hardware for ICE, either.

The reason the BM53 exists is because the Nav computer (the one with the CD slot) is actually what outputs the entire UI that you see on the board computer in the front of the car. Otherwise, the BMBT would've had to have had the radio integrated, and that would have taken a lot more space that was in use by the ventilation system.

The video is carried over three wires (RGB), which makes the "BoardMonitor" literally just a monitor. The radio (BM53) speaks to the nav computer over IBus to manipulate the UI of the Nav computer so that you can control the radio.
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Mods
Engine: Full Beisan Systems VANOS rebuild
Transmission: CDV Delete
Exterior: Smoked Corners | Black Side & Kidney Grills | Painted Reflectors


My Build/OCD thread
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Discussing Persistant Electrical Issues in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)