Reference Data 1.This cable can not work if your car uses a protocol ssystem like VPW,PWM or Can-bus. 2. Bus of communication 3.Terminal L= Ignition for waking up car computing system (ECU: Engine Control Unit) 4.Existed 3 different protocols with same OBD2 connector incl. ISO/KWP, VPW, PMW 5.This K/L Diaqnostic interface & cables work on ISO/KWP (Kev Word Protocol) Iaunched after 1996 only 6.Supported also ISO9141 protocol 7.The cables may work with some versions of the Carsoft, but carsoft used a lot of different intercaces during the different versions and also had some custom interfaces. 8.Product running as virtual comport, like many products it usees a USB to Rs232 converter chip .But under special circumstances this can give some problems regarding time especially on the handshake lines. 9.Read & erase error code, log data e. g. speed, gasoline, consume engine-rotating(RPM: Rotation Per Minutes).