KEFEX is a communication protocol and a set of software libraries for implementing that protocol developed by STW. The library eases the development of services tools to diagnose problems in a running system and allows end-of-line ECU parameter configuration. KEFEX is available for STW ECUs programmed in C or CoDeSys and also as a PC library for Borland C++ applications for Windows.

KEFEX consists of several easy to use modules:

• RAMView is used to define ECU parameters during development and facilitates reading and writing the parameters for easy ECU configuration.
• WinFlash is used to download a the application executable to the controller
• CANMon is a CANbus monitor that can view all messages and transmit arbitrary data.  CANMon includes symbol-based decoding.
• The VisLib component library is used to create your own PC diagnostic/service application with Borland C++ Builder.