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Audi a4 b6 - Yatour changer emulator, can't remember last played song.

Gumis_sx 7299 15
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 16688532
    Gumis_sx
    Level 10  
    Hello.

    I bought the emulator as in the subject.
    The problem is that every time after turning off the car begins to play from the beginning.

    It is connected using a standard allegro adapter. The radio is a bare cassette chorus. At the end I have a pendrive.

    I bet that the problem lies somewhere on the side of a lack of constant power supply.

    The player remembers radio stations so here is ok
    One thing that comes to my mind is that the radio without the key in the ignition position will not start.

    Any suggestions?
    I have a meter, I also know the basics of electrics.


    Best regards and thank you in advance for your help.


    Ps. The ground cable of the changer is screwed to the radio.
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  • #2 16688585
    DriverMSG
    VIP Meritorious for electroda.pl
    Gumis_sx wrote:
    It is connected using a standard adapter from Allegro
    Uses all cables from the emulator? Show connection diagram.
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  • #3 16688597
    Gumis_sx
    Level 10  
    The seller sold the adapter to me along with the changer. I throw a picture of my radio cubes, because the left side is free of pins is also disturbing.
    Attachments:
    • Audi a4 b6 - Yatour changer emulator, can't remember last played song. IMG_20170812_163433.jpg (3.15 MB) You must be logged in to download this attachment.
  • #4 16688605
    DriverMSG
    VIP Meritorious for electroda.pl
    Such a photo won't tell you anything.

    Check if you have pin 16 connected and if there is + 12V - the radio must be connected, the ignition switched off.
    Audi a4 b6 - Yatour changer emulator, can't remember last played song.
  • #5 16688679
    Gumis_sx
    Level 10  
    No ignition, no electricity. 12.5V appears with ignition
  • #6 16688757
    DriverMSG
    VIP Meritorious for electroda.pl
    It remains to disconnect this cable from the radio and connect it directly to 12V.
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  • #7 16688765
    Gumis_sx
    Level 10  
    I hurried up a bit and made a bypass from the lower ankle (red-black wire) to the one you marked. This solved two problems:

    The changer remembers the songs
    The radio works without ignition.

    Is this solution ok?
    Will he not drink for me?
  • #8 16688779
    DriverMSG
    VIP Meritorious for electroda.pl
    Gumis_sx wrote:
    Is this solution ok?
    Probably not. This is not a radio socket and maybe it will work, but I don't have a radio scheme to give 100% certainty.
    Gumis_sx wrote:
    Will he not drink for me?
    Certainly it will sound like you forget to turn off the radio at night.
    This is why the radio works only "behind the ignition".
  • #9 16688798
    Gumis_sx
    Level 10  
    I've always wanted to have no ignition.
    For example, in the Skoda company I have a radio without a key that plays for an hour then turns off. The cable from which I led the current to No. 16 is the cable with the largest cross-section and as the only one has voltage without a key.


    Maybe different ... How to connect it wisely ...
  • #10 16688803
    DriverMSG
    VIP Meritorious for electroda.pl
    In that case you should have + 12V in the bottom (from the picture) ISO plug, pin 4.
  • #11 16688822
    Gumis_sx
    Level 10  
    So I connected.
    But I noticed that after this procedure the backlight of the light switch is on all the time.

    It depends on the bank because after disconnecting the radio goes out.
  • #12 16688898
    DriverMSG
    VIP Meritorious for electroda.pl
    Maybe you made a mistake with pin 6, besides you need to unplug the current cable, you can not bridge these cables with the installation of the car.
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  • #13 16688953
    Gumis_sx
    Level 10  
    The cable from pin 4 of the lower cube, I put in place of pin 16th.
    Except that the light switch does not go out, everything works as it should.

    Can it connect a rectifier diode?
    I don't know, I think up what could be wrong.

    Ps. After all, I will not pull the battery cord now.
  • #14 16688956
    DriverMSG
    VIP Meritorious for electroda.pl
    You can give a diode, at least partially protecting the system.
  • #15 16690486
    Gumis_sx
    Level 10  
    I don't move today, I will fight tomorrow morning.
    The question is where does this glowing light switch come from?

    Added after 14 [hours] 49 [minutes]:

    Today I noticed that how could I not give this current, the key from the lights is illuminated. I stupid quite ...
  • #16 16694798
    Gumis_sx
    Level 10  
    Hello.

    Thanks mate DriverMSG the problem was solved and the changer works and also remembers stations without backlighting the light switch.

    For posterity ....

    In general, the whole "factory improvement" was that:

    - cut the wire from pin No. 16
    - we make a "bypass" (we plug in wire No. 4 of the lower cube - solid 12v) to wire No. 16.
    - we insert two rectifier diodes (1A is enough) according to the attached picture.

    All in all, the main reason for the proper operation of the changer, but the lighting switch was lit, was that the current, apart from the changer, was also going to the radio.
    After blocking the power diode, everything works as it should.
    Attachments:
    • Audi a4 b6 - Yatour changer emulator, can't remember last played song. Podlaczenie_Yatour_1458575_2069569.JPG (35.87 KB) You must be logged in to download this attachment.

Topic summary

✨ The discussion revolves around an issue with a Yatour changer emulator installed in an Audi A4 B6, where the emulator fails to remember the last played song after the car is turned off. The user suspects a lack of constant power supply as the cause. Various suggestions are made, including checking the connections, specifically pin 16 for +12V power, and making a bypass connection to ensure the emulator retains memory. The user ultimately resolves the issue by cutting the wire from pin 16 and connecting it to a solid 12V source, while also incorporating rectifier diodes to prevent backlighting issues with the light switch. The solution allows the changer to function correctly without requiring the ignition to be on.
Generated by the language model.

FAQ

TL;DR: Fix the Yatour memory issue by feeding constant +12V to pin 16 and adding two rectifier diodes (1A); “1A is enough.” [Elektroda, Gumis_sx, post #16694798]

Why it matters: This prevents resets, stops unintended backlighting, and avoids battery drain while keeping last-track memory. The FAQ is for Audi A4 B6 owners using Yatour/USB CD-changer emulators who ask “how do I fix last song not remembered?”

Quick Facts

Why doesn’t my Yatour remember the last played song in an Audi A4 B6?

The emulator loses memory because pin 16 (changer supply) doesn’t have constant +12V when the ignition is off. Provide a permanent feed. Use diode isolation so power does not backfeed other circuits. After isolating and feeding constant +12V, the changer resumes tracks correctly. [Elektroda, DriverMSG, post #16688605]

Which wire gives constant power on the Audi Chorus radio?

Use the bottom ISO plug, pin 4, which carries permanent +12V. Route this to the changer’s pin 16 to supply memory power. Add diodes to prevent backfeeding. This delivers continuous power while keeping the rest of the loom stable. [Elektroda, DriverMSG, post #16688803]

How do I wire the fix safely so I don’t drain the battery?

Isolate the new constant feed with rectifier diodes. Insert two diodes as shown by the poster’s solution to block reverse current into the radio lighting and other circuits. This preserves memory but stops parasitic loads when the car is parked. [Elektroda, Gumis_sx, post #16694798]

I bridged power and now the light switch backlight stays on—why?

A direct bridge lets current backfeed from the constant line into the radio harness and lighting circuit. The fix is diode isolation. Once diodes are added, the backlight no longer stays illuminated with ignition off. [Elektroda, Gumis_sx, post #16688822]

What diodes should I use and how many?

Use two rectifier diodes rated about 1A. Install them according to the provided diagram so current flows toward the emulator but cannot return toward the radio. As the poster wrote, “1A is enough.” [Elektroda, Gumis_sx, post #16694798]

Can I just leave the radio powered without ignition?

You can, but it risks draining the battery if you forget to turn it off. As one expert warned, the radio will draw current like you left it on overnight. Safer is diode-isolated constant power only to the memory line. [Elektroda, DriverMSG, post #16688779]

What voltage should I see during testing?

You’ll see about 12.5V only with ignition if the feed isn’t constant. That confirms the problem. After the fix, pin 16 should have +12V with ignition off as well. Use a meter while the radio is connected. [Elektroda, Gumis_sx, post #16688679]

Step-by-step: how do I make the Yatour remember the last track?

  1. Cut the original wire going to pin 16 (changer supply).
  2. Run a new feed from ISO bottom plug pin 4 (constant +12V) to pin 16.
  3. Insert two 1A rectifier diodes per the diagram to block backfeed. After this, memory and lighting behavior are correct. [Elektroda, Gumis_sx, post #16694798]

Will this fix also keep my FM presets and earlier settings?

Yes. With constant +12V to the correct pin and proper isolation, both the changer memory and radio stations persist. The poster confirmed stations and tracks were retained after the modification. [Elektroda, Gumis_sx, post #16694798]

Do I need special tools or just a multimeter?

A multimeter is enough for diagnosis. You’ll also need crimp connectors or solder, heat-shrink, and two 1A diodes for isolation. Verify voltage with ignition off before finalizing. This ensures pin 16 gets true permanent +12V. [Elektroda, DriverMSG, post #16688605]

What if pin 16 shows no power with ignition off?

Disconnect the original ignition-switched feed to pin 16. Then supply it from the constant +12V at ISO pin 4 through diodes. This restores memory without powering the entire radio continuously. [Elektroda, DriverMSG, post #16688757]

Why did bridging fix memory but break other behavior?

A raw bridge feeds constant power to multiple circuits, not just the emulator. That fixed memory but energized the lighting path, causing the backlight to glow. Diode isolation fixes both issues together. [Elektroda, Gumis_sx, post #16688822]

Is the 1A diode rating really sufficient long-term?

Yes. The solution report used two 1A rectifier diodes and confirmed stable operation. The memory line current is low, and the diodes act as one-way gates to protect the harness. [Elektroda, Gumis_sx, post #16694798]

What’s the quick expert takeaway before I start?

“Disconnect this cable from the radio and connect it directly to 12V,” then isolate with diodes. That sequence fixes memory and prevents backfeeding. Measure first, cut second. [Elektroda, DriverMSG, post #16688757]
Generated by the language model.
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