Weird issue: Rear-righr Taillight Warning & Parking Distance Sensor Malfunctioning

[mack89]

Hey guys,

So I managed to replace PCV and cleaned the intake valves, as well as the injectors.
It took me some time, because of my work, had to spare couple hours for 3 days to wrap up the DIY work.

After replacing the parts and started the engine for a test drive, parking distance sensor (PDC) didn't work.
1) Constant beeping noise came from rear-right speaker.
2) Rear view camera didn't work.
3) PDC button was flashing.
4) It was raining hard that day. (Parked my car outside.)

After few days, started the engine and voila, now the rear-right tail light warning lamp was on. Funny thing is, that brake lights and turn signal was working fine! Whatdaf..

And then, stupid PDC was coming back to life.
It didn't work at all at the first time, also the RVC refused to work.
But when RR taillight warning came on, RVC started to work.
Then, PDC sensor wanted to work for one second. Beeped, then silent.

My VAGCOM is at my friend's place, who happened to be on vacation (bastid), so I have no idea what's happening inside of those modules.

Before I start ransacking the wires, is there anybody who had similar experience about this symptom?

Thanks very much a looooot in advance :)
M

[Valpo A7]

Rear side marker lights are tied into the brake light circuit so if you get the brake light out notice, check the side markers. You can get replacement bulbs at Autozone.

I am dealing with the GDMFing buzzer as well. There is a buzzer speaker under the steering column as well as a buzzer speaker behind the rear seat on the right (for an A7) Camera works if it wants to and the speaker blares at me when I go into reverse for a few seconds. I bought a used buzzer and swapped it out but no luck so I suspect that I have a broken wire.

Speaker Buzzer - https://www.youtube.com/watch?v=TFqqQgn6Y-4

[mack89]

Hey Valpo, thanks for sharing the great video! This guy knows how to run diagnostic on electronics, thumbs up and subscribed..

In my case rear speaker is functioning, but for some reason PDC isn't. But this video gave me a great insight of checking the system.

By the way, checked the car again, right taillight warning message went away. Also the PDC went back to normal status for two seconds, then died again. RVC works. I'm assuming some kind of connection problem somewhere..

Thanks again, I'll keep you posted :)