UDS

UDS is a communication protocol widely used in the automotive industry for diagnostics, firmware updates, routine testing, and more. UDS communication is conducted in a client-server relationship, with the client being a tester tool and the server being a vehicle’s electronic control unit (ECU).

UDS enables the following use cases between the tester and the vehicle ECU:

• Reading/clearing diagnostic trouble codes (DTCs) for troubleshooting vehicle issues
• Extracting parameter data values such as temperature, state of charge, vehicle identification number (VIN), and so on
• Initiating diagnostic sessions to, for example, test safety-critical features
• Modifying ECU behavior via resets, firmware flashing, and settings modification

Initially, UDS was designed for CAN-based communication. Later, it was adapted for Local Interconnect Network (LIN), Ethernet, and wireless communication platforms. UDS has been widely used for vehicle diagnostics for a long...