2 Felicia 1997's, SIMOS 2P

My OBD2 reader will not link, using all protocols. Tried a friend's VAG-COM which worked before on both cars, but does not work now. Interface lights up OK, but get error message 3, suggesting interface not connected or K-line stuck. Since neither VAG-COM nor a known good generic code reader will not link, I am inclined to think that there is a K-line problem in both cars! Any advice much appreciated. I have not disconnected the battery because I am afraid of losing all immobiliser and radio codes. I don't want to inveswt in my own copy of VAG-COM because I now have a generic reader, and shall probably get a different make of car next time. Thanks if you can assist.

HJ

Have you looked on Ross-Tech?

K line

Thanks, the radios in these two cars are unchanged, factory models and diagnostics used to work ok. Nevertheless, I'll try the Ross-tech diagnostics suggested.

Check for any blown fuses.

If it is not radio related or fuse related, then your only choice would be to begin unplugging modules one at a time to see which module is hanging the bus. You should do this by looking at a wiring diagram for the car. As you eliminate a module, make a note. At the end, if all modules are disconnected and you still have the problem, then you have a short in the "loom" as you Brits call it.