How to Troubleshoot MMi, Audio & Navigation of Audi A8 for Repair. 

Very helpful, I had a 2004 A8 D3 chassis in the shop and this video was extremely useful.

I purchased the "lollipop" two weeks ago. It came quick and it worked. I know know the problem is the tuner. Well worth $20. Thank you😁

The optic cables go from the boxes in the back (amp, navigation etc) to where?? Back of cd Changer?? Or what module ?

Thank u for the time u took to show us this... blessings

i would like to thank you very much i managed to fix my MMI on Audi a5 that took me 3 weeks of researching nothing helped but your video, turns out my amp was water damaged!

What size is the loopback for your Audi? went to order one on Amazon but they kome in different sizes n voltages

Hi! I need some help ,Im not sure wich unit need to fix or what else is the problem the car was at the auto body and they were fixing the right rear fender panel they replaced it and after 2 months when they done the MMI system stopped working, no light no screen nothing no sounds, completely dead and they don't know whats happend .. We only find one blown fuse at the back where they were working for the stereo and still nothing !2005 Audi A6 3.2 quatro Thank you!

Good day @HitechElectronics. I just bought a 2012 Audi A8 D4. The screen opens (stays black)and then closes. Do you know what the problem could be?. I have look everywhere but I haven't found anyone with these particular symptoms. Any help would be appreciated.

thanks for sharing .am gonna buy the optic jumpers

What is the name or part number for the mmi control module in the glove box u showed in the beginning??

Hello Boss , Thanks for sharing your videos . Please how can i replace the fiber optic cable connector that connects into the display unit ? I opened mine last week , it looked like someone had severed the holes in the wire . I was thinking of replacing the entire cable , since you cant splice fiber optic cables . But where does the other end of the wire go ? Is it the module under the glove box ? Thanks again

very interesting.in my a8 the Bose amp went bad. i like your video

Awesome information. Appreciate you

Hi, I bought my audi a 8 2004, under the glove box there is no interface box but the mmi function well I don't find any cables supporting the interface as well

hello my radio a6 comes on and off and when it does shut off all the lights turn on RED. what could be the problem

how do i get the screen back in sequence. it come on but will bou open all the way

Great video... Can I make this lollipop or buy it.. If so where can I get it or how do I make one

i cant find the tester to check fibor optic lines display pops on but doesnt stay on

Hi, we have problem with audi a3 2014 mmi. What can be problem if display goes up, and display and all functions work but there is no sound (no radio sound, no handsfree sound…). And after we restart it sometimes just 1 and sometimes 6-7 times sound starts working. Also sometimes we can hear crackling noise from somewhere (we think it is from front big speaker).

amazing

Mine stopped working. And the worst is that the screen wont turn on. Due to On/Off button is located on this whole surface. But. I Fixed it. and here is what happened./. this can trigger malfunction when you change your battery. I completely forgot about that, and then remembered. So here is the rest: you need to locate the amp(s) in the trunk, and disconnect them . then disconnect the battery and leave for 5 minutes. and then leave the amp off , try to turn on the car. and see if the entertainent system buttons powers on. Mine did. then I turned off car, reconnected the amp and it worked again. It just needed to be reconnected. or reset

Ayos

What if the screen won’t Evan come out when starting. I’ve got nothing only have lights on xd changer and navigation unit

Great video! In mine the MMI works fine but there is no sound at all, what could be the problem? Thanks

excellent video guys, my mmi display comes on but has horizontal or vertical lines only, all other functions seem to work fine is there any way of determining if it's the display or interface which is faulty?

Where does the Blue GPS antenna wire plug in on a 2018 Audi Q5? Is it a module in the back or the front of the car? Thanks!

My radio sounds muffled.. and every once in a while in comes clear...then back to muffled...and how do I get the sirius box to work? Does not show up on the MMI.. but its back there with the tuner and the navigation box...

I spilled soda on the main center console it worked alright after I used electric cleaner but now it works for a minute and shuts off would getting a new motherboard ot a whole new main center piece would it fix it or would I need it recoded

Thank you must be my amp or a fuse....cheers!

Hello! I came here seeking help and guidance from anyone who knows what up with my car. I own a Audi A8 4E 2006 So recently i installed a kufatec unit to enhance my MMI features and performances, but during the process of install i realised my mmi head unit doesnt support it (4E0 035 729), as you probably guess i went a head and brought the right version with cables support and such (4E0 035 729A) all went well and running exept for one thing which is when i turn on/off the car the mmi screen doesnt open/close This only happens with the new mmi unit, when i switch back to the original it opens and close fine. So what im asking is if theres an option to set it up so the new unit would open and close the screen? I own a vcds scanner so the codage to enable it is also very appreciated Thank you for your time!

My screen won’t pop up but navigation and cd player light up changed the mmi center board still nothing any help

Very informative. I suspect that my problem is mice getting into the car and chewing through some wiring. Little bastards! I caught 4 in 3 nights. Using peppermint oil as a repellent.

Your comment is awaiting moderation. Hello! I came here seeking help and guidance from anyone who knows what up with my car. I own a Audi A8 4E 2006 So recently i installed a kufatec unit to enhance my MMI features and performances, but during the process of install i realised my mmi head unit doesnt support it (4E0 035 729), as you probably guess i went a head and brought the right version with cables support and such (4E0 035 729A) all went well and running exept for one thing which is when i turn on/off the car the mmi screen doesnt open/close This only happens with the new mmi unit, when i switch back to the original it opens and close fine. So what im asking is if theres an option to set it up so the new unit would open and close the screen? I own a vcds scanner so the codage to enable it is also very appreciated Thank you for your time!

after getting wet my mmi screen stopped working at all but I was able to use the cd player with steering controls and bluetooth still worked but after a week my mmi control unit stopped working all together. All mmi buttons used to light up when I turned off the car now its all dead. fuse 12 and 14 on passenger side is ok. I will try to do the loop test for the optic lines in the trunk. Is there a fuse or relay for the mmi control unit, if yes where? How long turn around time if one of my units defective in the trunk? Thanks for all the info.

Hey, I just have a same problem with my MMI screen comes on just for a few seconds and after that it goes off again. I already checked every module in a trunk with a Lolipop wire but seems like nothing helps. Have any ideas why? And where I should check next? Thank you.

Great video. Well done.

My issue is when I turned the radio on, there was only static. Then the FM and AM options disappeared, leaving only Sirius. Still no sound. Then the screen went blank as described, showing the MMI insignia. After turning off the car for 20 min and turning back on, it must have reset itself, so it is currently working. I have to believe this is a hardware/software issue. I'm certain it will return.....knowing my luck.

Is the diag process any different with the bang system?

Where do i get the „Lollipop“ ?

I have black screen and I bought fiber optic loop I put in serious tuner and mmi started working for 2 months now I went to start car and turn on mmi flip up came up but stayed black so I have a another device broken or I have to change serious satellite box in my a8 cause when I put loop plug in it wasn’t working for 2 months now it’s not help me please?

I still need help on this mmi situation can someone help me please this has to be the most frustrating thing no function again is it possible for multiple modules to be broke at the same time cause fiber optic bypass worked for the serious tuner in the 2006 a8 once I put it in for 2montha now it’s not working no more so do I need a new serious tuner box or do I have another module broke can I plug in another bypass to other module while I have one plugged into tuner allready what can I do I did my a fm Bluetooth transmitter and was using it to listen to music on my phone could that have done something I’m so confused I need help I’m not trying to go to dealer they try to make u just change all the system I just need to know if there’s also another module faulty or do I have to switch out the one I found faulty before ???

I live in Paramount Ca can and I have 2005 A8 with black screen and no sound can you fixed please let me know

2008 audi a6 Having an issue with the mmi No screen on no light on the mmi control unit at all There is power coming to it The screen dont go on at all Please let me know what i can do And how much is for repair the unit Thank alot

I can't find the link to buy the lollipop... Can you send the link here? Also, do you guys do the troubleshooting if I bring my car there? If so, How much?

Hi, I have Audi A6 2012 my screen went blank its been for months now everything still works fine though.... help help!!!

I've got a 2007 a8l and about a month ago my mmi started to act up. It would work temporarily and would just shut off and following the shut off I'd hear a clicking noise like a relay sound. Now it doesn't work at all, I just hear the relay type noise eveytime the vehicle is started and after a few clicks it it stops and nothing works. No screen and none of the mmi buttons light up. Any thoughts? Thanks

Where can I get a "lollipop" fiber optic connecter and loop like the one you used in your demo?

Im having a problem with an Audi A1 2011 display and sound are not aviable but Bluetooth still working, i can answer calls with out problem. Please, can you help me?

Is it possible to leave the loipop in for a temp fix?

My mmi has no power at all no power on the controls for the mmi but push to start and everything else works

I got my self an a8L 06 got it with a non functional mmi, checked fuses and they are good, replaced the circuit board and still no function also the buttons to control the MMI have no lights. Old owner said it had stopped working after replacing the battery. Also the screen won’t even open up

Hey I have the issue where the radio and the screen seems to have no power. Whats could it be?

How about if your screen just keeps rebooting after a minute no sound no nothing

2011 A8: MMI won’t even pop up when I turn the car on…no light for the radio/media. What should I do please?

2017 audi q3- my mmi system works fine, but Won’t load media or navigation system. I can’t play music via Bluetooth. Screen says “initializing system, please wait” Any idea what’s wrong with my mmi system?

UPDATE :: MY MMI is now working My guess would be the computer system restored itself took about 3 weeks till one day I started my car and the radio came on...but before that I checked the fuses in the trunk removing one by one all good then I started the car and pressed the on button to turn on the MMI and the radio did come on but went back off till the third day radio came back on and hasn't turned off so far its all working again..I don't know if it had something to do with removing each fuse but ever since I did that it helped the system work faster to restored itself...

Great video! It helped me with my Audi A6 (c6) from 2005, but I'm fighting with my colleague's Audi Q5 (8R) from 2010 with MMI 3G plus, if I'm not confused. It has a normal screen, not foldable. Screen is totally off, no signal at all. Audio system is working, I mean if I turn on the radio it works, but the display would remain dead. The MMI control buttons are working (central console buttons and wheels) but obviously I cannot see the result of what they do because the display is always off. Do you think the problem is in this module you show is behing the glovebox? What's the name of this module? Do you know the part number of it? (just to start looking for estimated prices here in Spain) Thanks in advance!

The display pops up when I start the car and sound is on, but then after like 10 seconds it turns off and the display goes back down. Any idea what it could be? 2004 A8 Quattro. Please help.

I'm having a little problem with my MMI system I have a 2009 Audi A8 there's no function at all nothing works the only time the screen actually comes on is when you press a button on the center console can anyone help me I bought the bypass Loop and I bypass everything that needed to be bypass in the trunk and under the glove box and nothing happens

MMI turns on and shuts right off??? HELP Anyone have this issue were your MMI turns on and the just shuts right off song all works

Hi, I have Audi A8 L 2011, the MMI system is not showing the front and rear camera also no sound Please can someone help?

is that a male or female fiber optic cable you using

What could be the problem if the screen doesn't even turn on? Display interface box or cd changer?

I did get water on the passenger side floor Lord and I lift up the mats and there's a module under there but I do not know if that module is part of the MMI system does anyone know

Have an A8l screen pops up for a few seconds then closes controls are not lit. Any advise?

I’m having a similar problem. No power at all. Screen is stuck out and blank.

You could just use vcds????

mine pops up and plays but then shuts off or none of the button s work

the module behind the glove box

Was the optical loop he used male or female?

my Audi a8 the display comes out the dashboard and returns back into the dash board after less than 30seconds

hi I changed mine and I have no audio with a line through the speaker

use ODIS and do a ring break test no need to tear the car apart for nothing.....

I need the loop

Hey this looks like my car

not getting any light on the fiber optic line anywhere could this module be the problem

this lolipop ir just a piece of wire loop?

Hi I have a Audi A8 2003 and my problem is that the MMI, as you show in the middle of your video, shuts off by its self. The Audi mmi logo come up for 10 seconds then I hear a noise from speakers then it shuts down and comes up again by its self. Even when I remove the key and look the doors it still comes up and shuts off and drains the battery. I have done the loop test but didn’t help. I gave the car to a dealer last week and they still can not find wats wrong. They have replaced the middle console thing and still not getting response. They have fond the Telefon module under driver seat that have some moisture on it but they said inside looks good. Do you have any idea? Please help me out 🙏

Is the "lollipop" tester male or female?

My display shows with no problem but I get no sound

Audi is 2006 a8 4.2