USB KKL VAG-COM for 409.1 Workable Model This diagnostic cable is usable for ISO9141 and KWP2000 transmission protocol like used for example by: • Volkswagen • Audi • Skoda • Seat Reference Data 1.This cable can not work if your car uses a protocol/bussystem like VPW, PWM or CAN-bus. 2. Terminal K = Bus of communication