Cvcii

Trying to find out what these wires actually do. Pins 15 (e&c data) and 16 (serial data). I'm wondering if they can be connected to an aftermarket head unit to display any vehicle data. I have been googling for a while and can't find anything. I can't find an idatalink adapter that works with a c5 so I'm at a loss.

Cvcii

Oh ok thanks. That is very helpful! Gonna install a new head unit. Now I gotta look at what I need to keep that feature. Looks like there are a couple of options. Gmrap or accessory valet. Thanks again for pointing me in the right direction!

Cvcii

How bout this?

https://www.ebay.com/i/222161045730

aj98

Iirc, Door/key chimes are routed through the radio. Perhaps that's why.

GCG

To properly replace just the head unit leaving the rest of the system in place you will need an adapter (not just a harness) to provide the required interface. This is due to the way the factory system was designed.

The 2 most common adapters are:

• Axxess XSVI-2004
  Axxess XSVI-2004
• Pac Audio ROEM-VET1
  Pac Audio ROEM-VET1

The first one has RAP capability.

Replacing the head unit should be just plug-and-play by using either one. Both have setup adjustments to customize sound/levels. After tweaking them to your liking, they shouldn't require any further touching.

Tsumi

I used the Axxess and RAP is maintained perfectly. The only issue is that sometimes it doesn't turn on right away, it will sometimes take half a minute to a minute to turn on.

Tsumi

I only said RAP is maintained perfectly. RAP has nothing to do with turning it on

Cvcii

Thanks for all the info. I have the pac on order. As well as a new Kenwood h/u and backup camera. That will get my by for now. Probably rip out and replace all the speakers next year.