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Discussion Starter · #1 ·
I installed a Kenwood CD player in my Cabrio. I used the wireharness I bought at the local car audio place and it worked great. We had some issues with the car and brought it into the dealership and they said the computer in the car was not receiving any data and that they needed the stock stereo back in it. Apparently it is like this on the Beetle too as the manager proceeded to tell me it happens all the time and said there was even a VW tech bulletin about it. Anyway, I need to get that sodding casette player out of there, has anyone done an install of a 3rd party stereo in these cars and gotten around this. I know my wiring is correct, the dealership even said the wiring was correct but there is some custom connectin that either needs to be cut or made for the computer to get data. Anyone know what that is? I am concerned that the check-engine light will fail to come on (again) or that the oil light will fail if something goes wrong.
 

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Re: 3rd Party Stereos (jerzakie)

It is the "K"wire that is not connected. Without that there is no communication through the instrument cluster and the 5051 or 5052 will not communicate to the ECM.
It is like that on Audi as well as VW. I can't tell you why - just that it is.
 

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Re: 3rd Party Stereos (jerzakie)

http://www.ross-tech.com has an article about the K-wire somewhere.
Dealers may be afraid to connect their scan tools to a car with an aftermarket radio because some adapters make the K-wire hot all the time, which can damage the scan tools.
 

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Re: 3rd Party Stereos (jerzakie)

It is one of those mysteries! I do not know. We usually get the owner to pop in the OE radio so we can diagnose and repair the car. http://****************.com/smile/emthup.gif
 

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Discussion Starter · #6 ·
Re: 3rd Party Stereos (SERVICEMANGLER)

http://www.ross-tech.com/vag-c....html
That has the info.
Here's the cliff-notes...
There are two connectors in the car for the radio, one has a key that is off-set the other has a key that is right in the middle.
One the connector that is offset (see the illustration on that web page) there is a gray cable with a white stripe, that is the infamous "K-Line". Apparenly on older vehicles that HAD to be looped back to a ground, on the new vehicles if it is, then the diag machines fail.
On the aftermarket wire harness that you wire to your stereo, there will be a looped-back wire going from that pin (pin 3) to the ground (pin 8), snip that wire. Your K-Line is servered. ** DO NOT CUT THE WIRE ATTACHED TO THE CAR **
--------------
| 1 3 5 7 |
< 2 4 6 8 |
--------------
That is a a makeshift pinout diagram looking into that connector.
Anyway, look at that link about it's all in there.
 
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