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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > [Please HELP!] 325i Logic7, interface on, no sound



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      09-07-2019, 11:03 PM   #1
allansmoraes
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Exclamation [Please HELP!] 325i Logic7, interface on, no sound

Hi, I'm working on a 325i 2005. she is kicking my ass!

Lets go to the facts:

1. HU is on, display shows the station, but the CCD (cd changer) is showing on/off, in a 3 seconds interval. When it turns on, the speakers works and the sound comes out. But it stays on for about half second and turns off.

2. The PDC is not working. I notice that when the sound comes out (sometimes stays for about 3 seconds) the PDC works.

3. I've checked every fuse, and nothing seems burned.

4. I've checked also the + wire at the amp (left of the trunk)

I read that this system uses a optical signal, and seems like something is fucked up.
Can anyone help me?

This is a costumer car, this shit happened when the car came to my shop to change front struts.

THANK YOU if you read until here



Allan Moraes
São Paulo BRAZIL
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      09-07-2019, 11:05 PM   #2
allansmoraes
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NOTE:

As i'm in Brazil, it will be impossible to find a Optical LOOP test.
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      09-08-2019, 11:11 AM   #3
ctuna
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Can you order it from the Amazon?

https://www.amazon.com/optical-bypas.../dp/B01FREU5F8

I think you could make your own with a straw to get the two ends
of at a connector to point at each other. The two ends in the connector
have a plastic pin that holds them in the connector.

really if the display is going on an off I would check for a power problem first. The electrical system is made more complicated by the IBS.
Intelligent battery system (it can turn stuff off )
Read about it in the first electrical pdf
This can cause you to chase your tail.
Always be sure you have a fully charged battery and the alternator
is putting out a reasonable voltage before you start looking at other
reasons the car is acting up.

I would also suggest you get some diagnositcs
such as Inpa and or Ista D going on a PC
if you continue to work on BMW's
45 Bucks for the Bimmergeeks.net cable
and some time to set it up and you will have factory level diagnositcs.

diagnostic manual ista/inpa
https://bimmerprofs.com/diagnostics-inpa-part-1/
https://www.google.com/url?sa=t&rct=...xo19teM9vkTF-C
https://www.google.com/url?sa=t&rct=...7x8H3pN8h1fMuF
https://www.bimmerforums.com/forum/s...-P-actually-do

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

georges links
https://www.bimmerfest.com/forums/at...9&d=1539905743

Most test point
http://www.e90post.com/forums/showthread.php?t=347222

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/

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
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http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...3&d=1169133185
http://www.e90post.com/forums/attach...4&d=1278871872

Last edited by ctuna; 09-08-2019 at 12:36 PM..
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