Jetta MK2 1.8 RP Diagnostic

[Premixem]

Hello.
My name is Przemek. Im from Poland, and I am looking for help.

My car has a CE2 electrical system manufactured after 1990.
Under the hood I have a yellow diagnostic connector next to the ignition coil. I have two black and beige plugs under the gearbox bellow inside the vehicle. I bought an OBD1 to OBD2 and OBD ELM BT connector but it does not start because the K line is probably missing in these plugs. There is probably only an L line and ground and + 12V. Is it possible to somehow run or connect OBD2 by somehow remaking the old plugs? I also thought to connect directly to the central device under the hood under the shaft with the appropriate PINs of the K and L lines as well as the grounding and + 12V from the battery .. Greetings from Poland and thanks for help!

 

[Bruce]

Sounds like you might need one of these adapters: https://store.ross-tech.com/shop/af2x2/

 

[Premixem]

I have this from site: Allegro.

 

[Uwe]

An Mk.2 Jetta most likely does not have the ability to do "Rapid Data Transfer" via K-Line. There were a very few exceptions: A few cars with 1.8L Digifant injection and California emissions, and some 2.0L 16V cars that had CIS Motronic.

-Uwe-

 

[Premixem]

I was thinking about connecting directly to the controller under the hood with the appropriate pins. Controller code 443 907 403 G. I once pulled out the OBD2 connector with the Golf 3 wires and I would use it by connecting to the ELM 237 BT. http://www.a2resource.com/electrical/management/motronic.html

 

[Jacek]

Try to look for something similar to your car, if I'm wrong correct me read the flash codes.
[URL unfurl = "true"] https://vwts.ru/vw_doc/eva2/FU01/ch3.4.html [/ URL]

 

[_Val]

... and OBD ELM BT connector but it does not start because the K line is probably missing in these plugs.

How Do I Know Whether My Car is OBD-II Compliant?

OBDLink® Vehicle Compatibility Chart Continue reading →

www.scantool.net

 

[Uwe]

I was thinking about connecting directly to the controller under the hood with the appropriate pins.

I really don't think this will work. Car (and ECU) do not support the generic OBD-II protocols that an ELM device requires.

-Uwe-

 

[Premixem]

So I will have to visit a Volkswagen car service which has such a diagnostic device. Thank you for your help