[Santirx]

To keep things PORSCHE, take a look at @Teddis idea, which I developed and implemented…

This is a wallpaper with a simple Porsche logo at the bottom… I think it looks phenomenal (my opinion), so it’s staying in my unit.

Link to Wallpaper (if interested) here: MTK Wallpapers - Google Drive

 

[Santirx]

That confirm my understanding, the internal app SVM or something like that is not to change our Porsche steering wheel but an additional aftermarket device.
TBH having an additional device starts to be too much for me.
we have a Porsche so let’s try to minimize aftermarket device on it

The SWC app is useless in our scenario, because the steering wheel control signal is sent via canbus hi/lo and intercepted at quad lock connection by the unit, which is then sent to the canbus decoder. That canbus decoder has a specific programming that decodes the steering wheel signals a certain specific way and then is sent via the key1/key2 wires into the unit with these specific commands… there is nothing that the SWC app can do with that signal.

For the most part, the steering wheel control does what it needs to. Volume control works. Even phone control works. But the issue is the diamond button function is “hard coded” to change unit source via that canbus decoder. So, if you want to use the diamond button to control functions in the car, like selecting sport plus for example, you will be impacting the unit as well (changing source at same time), so it becomes a nuisance.

Our argument with ACAR is that they should either provide us with an app that intercepts the SWC signal and convert it to something else (like FYTHWOneKey app was doing in FYT units for us - note that this is an MTK unit), or completely disable the diamond button signal in the canbus decoder (which is less likely because these canbus decoders seem to be Porsche generic which all these android unit use)… they can also have the unit ignore the diamond button signal, and that is probably easier and within their control…

This is a video where I implemented the use of the FYTHWOneKey app in my FYT unit using ADB Shell to convert the signal into skip track. Unfortunately the app doesn’t work in MTK units yet, but in talking with the developer he believes that some changes in the software will make it work. Unfortunately I’m not an Android expert (heck, not even an amateur)…

Finally, I figured it out! I modified the Diamond Button SW Control for my FYT 12.3 Android unit

We continue to explore all these avenues to see if we can solve the infamous diamond button problem…

This is the GitHub project page for the app, in case one of you is an expert and can help us figure out a solution:

GitHub - noenic/FytHWOneKey: App to modify the hardware buttons on FYT units (Sofia3GR/PX5/sc9853i/sc9863a/uis7862)

App to modify the hardware buttons on FYT units (Sofia3GR/PX5/sc9853i/sc9863a/uis7862) - noenic/FytHWOneKey

github.com

 

[Teddis]

Looks better than OEM....congrats !

 

[BradP]

I’m testing the install and all functions work except for the backup camera. Connections on new unit are correct with the video out on the new harness connected to CVBS IN. For some reason I can’t find any info online on my OEM unit. Here is what the back looks like. Just a guess, but I wonder if the white connector is the camera signal. Any help would be much appreciated. Acar unit looks really good, but not sure I can live without backup cam

 

[djbooya]

I’m testing the install and all functions work except for the backup camera. Connections on new unit are correct with the video out on the new harness connected to CVBS IN. For some reason I can’t find any info online on my OEM unit. Here is what the back looks like. Just a guess, but I wonder if the white connector is the camera signal. Any help would be much appreciated. Acar unit looks really good, but not sure I can live without backup cam View attachment 291251
View attachment 291249
View attachment 291250

What unit is that? It doesn't appear to be the one discussed in this thread.

 

[Santirx]

What unit is that? It doesn't appear to be the one discussed in this thread.

I think this is PCM4, so, he’s trying to install dual screen in a 2017 or 18 Macan.

 

[BradP]

What unit is that? It doesn't appear to be the one discussed in this thread.

Sorry, to clarify, that is the OEM PCM 4 head unit I am replacing with this dual screen. I posted the pics to see if anyone can help identify the connections. I can’t seem to find any info online.

 

[Teddis]

Is this an ACAR Dual screen going in ?

 

[BradP]

Yes, I bought it from ACAR/Milo for my 2018 GTS.

 

[Teddis]

Awesome, @Max75 , can you help with this 4.0 install question ?

 

[JerryP]

I thought CVBS is not used. Where’s the MOST adapter?

 

[BradP]

I thought CVBS is not used. Where’s the MOST adapter?

MOST is for the speakers.

 

[JerryP]

 

[Teddis]

@bradpanganiban , did you try the other Yellow RCA ? I would assume so....

 

[BradP]

@bradpanganiban , did you try the other Yellow RCA ? I would assume so....

Ya, I tried that too. Puzzling because seems like I'm the only one with the issue. If that White cable is not the video button, then the only thing I can think of is that the video wires in the main harness provided to me from ACAR might have been wired for PCM3 instead of PCM4. Or maybe there is a loose pin. After work I'll take a look again. Man, I'm dying for this thing to work, it's pretty awesome!

 

[JerryP]

I have installed the Dually on a 3.1 Bose system and a 4.0 Burmeister. Plugged the OEM connector for MOST directly into MOST adapter, other 2 optical lines were not used in the 4.0. 2 lines from Dually were not used

 

[BradP]

I have 4.0 Bose, but I assume same principal. Your pics are how I have mine connected now. I was hoping it was software setup thing, but I went into the 8888 settings and checked to make sure everything was CVBS / NTSC.

 

[JerryP]

Lot of wires go nowhere now. Connections are same for 3.1 and 4.0. Only thing I messed up were red and white leads

I have 4.0 Bose, but I assume same principal. Your pics are how I have mine connected now. I was hoping it was software setup thing, but I went into the 8888 settings and checked to make sure everything was CVBS / NTSC.

good luck! Put tape on your leads where the coaxial cables connect, make sure they stay nice and tight

 

[BradP]

Lot of wires go nowhere now. Connections are same for 3.1 and 4.0. Only thing I messed up were red and white leads

good luck! Put tape on your leads where the coaxial cables connect, make sure they stay nice and tight

Good idea, such a tight fit so good chance of disconnecting.

 

[JerryP]

Be sure to test before fitting in. Everything checks out pop her in, of course after placing wiring and boxes behind new ac vent. Hope you have someone helping. I put the stuff behind then put in the 4 screws holding the ac vent in.
antenna lead is a bit too long, I used wire clippers to trim a bit on plastic off the end, about 1/4 inch, then applied silicon grease on it to help it slip over the plastic for the vents!
Im going to PM you, I’m helping my wife hang an art showing and will have no wifi connection for a few hours. Call with questions, glad to help you.
I love my Dually!