Hi guys


I'm still having trouble with this so thought I'd start a new thread and share what I've learnt with others on the same mission. Maybe the group intelligence will get it solved...


My goal is to retain the factory camera with dynamic trajectory. If possible...


Car is a 2009 Passat R36 wagon ex-Japan.


I have the crngiar Android Auto RCD330+ head unit. HW:534. SW: 5515 pre-installed.


Everything on the head unit works as it should except I get an error message when selecting reverse that the "rear view" camera system is currently unavailable. A few seconds later park pilot activates on the screen and works as it should.


With the rear tail gate open I just get park pilot - no error message, no camera. So the system is correctly detecting the tailgate is open.


I've tried installing one of those ebay / aliexpress 26 pin RGB-CVBS converters but no good. Today just to be certain I had wired it correctly I tapped the yellow wire (back/reverse) into the reverse light (previously it was just constant 12V) but still no dice. I'm getting +12V at red, have tested ground, and was getting +12v at the reverse/back wire.


So I decided to pull the rear panel off the tailgate and take a look at the camera wiring which is where things get interesting. There are 6 wires coming off the tailgate handle:





2x black with their own harness - presumably for the tailgate latch.


4x coming off the camera:


red and black to their own harness. I measured 6V across these wires when reverse is selected (tailgate up) and nothing when in Park.


yellow and black to a shielded coax-style connector (grey with purple in photo)


So this is not an RGB output then?! But rather looks like coax? Anyone familiar with this?


It raises a couple of questions:


Where do the dynamic trajectory lines get added? They obviously need steering wheel input and then get overlaid. CANbus function?


More interestingly - if it's a coax output, does the factory setup then convert this to RGB somewhere before outputting it to the 26-pin connector? Why?


And if so I would be able, theoretically, to connect a coax cable with RCA connector to these two wires and plug it straight into the RCD330+ RCA-in albeit without trajectory lines?


Also, there should be no reason why the RGB-CVBS converter doesn't work as surely it is just taking the video signal from the 26-pin connector and converting it? Unless that connector also needs some sort of input to let it know it's connected to a headunit before it outputs a signal?


Anyone able to share their experiences or shed any light on any of these questions?