SAVE MY MARRIAGE - MMI Troubleshooting
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SAVE MY MARRIAGE - MMI Troubleshooting
My wife has a 2016 Q5. I tried to upgrade her Nav system with CarPlay so I bought one of the add-on kits that gives a you a box and wiring harness to plug into the back of the head unit. It was working good but I kept tinkering with it and when I tried to get the Head unit back in it seemed obstructed probably from the extra room taken by the CarPlay box and wiring harness. My mistake was I started trying to force it a little and then:
- The MMI display went blank/black. It is not backlit at all. As if it gets no power.
- The MMI control buttons on the console (ie. Media, Navigation Menu, Radio, Back, etc..) do not backlight nor do they seem to operate
- The Head unit lights for Parking Assist, and Auto Off and Traction Control DO WORK and are backlit
- The DVD player will not accept a DVD
- The A/C and heat controls are lit and seem to be working fine.
The things I've tried are:
- Ive removed the CarPlay unit altogether but now the OEM is not responding so I assume I have damage something in the OEM equipment
- I've checked and replaced fuses on the passenger side and in the rear.
- I did a loop test on the unit behind the glove box and on the amplifier in the back. Those were the only modules I could find.
- I figured I must have fried the head unit so I purchased another one used off of Ebay but after plugging it in I got the same thing. - As a last resort I detached the battery cable to see if something would reset. It didn't.
- I am not a mechanic but I happen to have a Ross Tech VCDS so I ran a diagnostic. As expected I got errors but honestly I don't know what else to try. I will attach a report of the scan. I also did an optical scan and it said it could not communicate with radio of instrument cluster. Here is a link to the report:
- Ive disconnected and reconnected all wiring to the head unit and have inspected wires and pins and cannot find an issue
https://docs.google.com/document/d/1...it?usp=sharing
I just can't afford to spend a bunch to repair it right now (out of work for now) so I would really appreciate any help for something I could try. About to hit the road for a road trip anniversary with the wife and its gonna stink to not have a radio.
Thanks in Advance!
Sam
- The MMI display went blank/black. It is not backlit at all. As if it gets no power.
- The MMI control buttons on the console (ie. Media, Navigation Menu, Radio, Back, etc..) do not backlight nor do they seem to operate
- The Head unit lights for Parking Assist, and Auto Off and Traction Control DO WORK and are backlit
- The DVD player will not accept a DVD
- The A/C and heat controls are lit and seem to be working fine.
The things I've tried are:
- Ive removed the CarPlay unit altogether but now the OEM is not responding so I assume I have damage something in the OEM equipment
- I've checked and replaced fuses on the passenger side and in the rear.
- I did a loop test on the unit behind the glove box and on the amplifier in the back. Those were the only modules I could find.
- I figured I must have fried the head unit so I purchased another one used off of Ebay but after plugging it in I got the same thing. - As a last resort I detached the battery cable to see if something would reset. It didn't.
- I am not a mechanic but I happen to have a Ross Tech VCDS so I ran a diagnostic. As expected I got errors but honestly I don't know what else to try. I will attach a report of the scan. I also did an optical scan and it said it could not communicate with radio of instrument cluster. Here is a link to the report:
- Ive disconnected and reconnected all wiring to the head unit and have inspected wires and pins and cannot find an issue
https://docs.google.com/document/d/1...it?usp=sharing
I just can't afford to spend a bunch to repair it right now (out of work for now) so I would really appreciate any help for something I could try. About to hit the road for a road trip anniversary with the wife and its gonna stink to not have a radio.
Thanks in Advance!
Sam
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