Ok, well being a poor person, I decided to make my own OBD cable, using Andy Whittaker's PCB interface. All soldered up now and have electrically tested it and all is well. However, I've just had a look at my OBD port in the Fabia and I don't appear to have an L line (as is suggested in the diagram here). I appear to have pins 4, 6, 7, 14 and 16.

Can anyone confirm if this is the case, and also tell me what pins 6 and 14 are for on my OBD socket as I'm curious?

Thanks

Chris

have you tried it in the car yet?

My one only has 5 pins, but I brought it already made.

Yeah sorry - meant to say that the 3 pins, Ground, +12V and K all work fine. Just curious about what the other 2 pins do

Chris

A worthwhile note, make sure the grounding pin is longer than all the others. It is essential that it is so its earths the diag unit first, if it aint it can damage the diag equipment and ECU's.

Also this is why you shouldnt ever connect a diag unit cable to the car first before connecting it to the lap top or diag unit.

ScoobyChris, did you ever finished this? Does it work? Are you building to order?

Lol @ Q! I got the kit from here who builds the PCB's and then you basically solder up the 3 wires to the ODB connector supplied. You have to get your own serial lead, but I made my one up myself.

However, downloading the latest shareware version of VAG-COM (v404), it doesn't appear to work with the cable and tells me no interface can be found (even though the LED check works). Old shareware version I had v312 seemed to work fine so I'm going to drop Andy an e-mail and see if this is a known problem.

Chris

The interface board you have is based on opto-isolators which the vag-com download page says is only supported by version 311.2, rather than the newer 404.0.

Ah right! Will have to look into whether v404 is significantly better to justify getting a proper cable

Chris