1. This diagnostic cable is usable for ISO9141 and KWP2000 transmission protocol like used for example by: - Volkswagen - Audi - Skoda - Seat 2. This cable cannot work if your car uses a protocol/bus system like VPW, PWM or CAN-bus. 3. Terminal K = Bus of communication 4. Terminal L = Ignition for waking up car computing system (ECU: Engine Control Unit) 5. Existed 3 different protocols with same OBD2 connector incl. ISO/KWP, VPW, PMW 6. This K/L Diagnostic interface & cables work on ISO/KWP (Key Word Protocol) launched after 1996 only. 7. Supported also ISO9141 protocol 8. The Cables may work with some versions of the Car soft, but car soft used a lot of different interfaces during the different versions and also had some custom interfaces.
