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Unified Diagnostic Services (UDS) is a diagnostic communication protocol used in electronic control units (ECUs) within automotive electronics, which is specified in the ISO 14229-1. [1] It is derived from ISO 14230-3 and the now obsolete ISO 15765-3 (Diagnostic Communication over Controller Area Network (DoCAN) [2]). 'Unified' in this context ...
As defined in ISO 15765-4, emissions protocols (including OBD-II, EOBD, UDS, etc.) use the ISO-TP transport layer (ISO 15765-2). All CAN frames sent using ISO-TP use a data length of 8 bytes (and DLC of 8). It is recommended to pad the unused data bytes with 0xCC. The PID query and response occurs on the vehicle's CAN bus.
The most common application for ISO-TP is the transfer of diagnostic messages with OBD-2 equipped vehicles using KWP2000 and UDS, but is used broadly in other application-specific CAN implementations where one might need to send messages longer than what the CAN protocol physical layer allows (8 bytes for CAN, 64 bytes for CAN-FD, and 2048 ...
ECU access via CAN, using the CCP, KWP2000, UDS and XCP protocols. ECU access via FlexRay and XCP protocol; ECU access via Ethernet and XCP protocol; ECU access via SOME/IP protocol; ECU access with parallel ETKs via address bus and data bus; ECU access with serial ETKs, through microcontroller debugging interfaces such as NEXUS, JTAG and AUD
Keyword Protocol 2000, abbreviated KWP2000, is a communications protocol used for on-board vehicle diagnostics systems (OBD). This protocol covers the application layer in the OSI model of computer networking. The protocol is standardized by International Organization for Standardization as ISO 14230.
Five signaling protocols are permitted with the OBD-II interface. Most vehicles implement only one of the protocols. It is often possible to deduce the protocol used based on which pins are present on the J1962 connector: [30] SAE J1850 PWM (pulse-width modulation — 41.6 kB/sec, standard of the Ford Motor Company) pin 2: Bus+; pin 10: Bus–
Society of Automotive Engineers standard SAE J1939 is the vehicle bus recommended practice used for communication and diagnostics among vehicle components. Originating in the car and heavy-duty truck industry in the United States, it is now widely used in other parts of the world.
UDS may refer to: Ubuntu Developer Summit, for Ubuntu Linux; Ultra Deep Survey, deepest near-infrared astronomical survey; Unified Diagnostic Services, a vehicle communication standard used for vehicle diagnostics; Union Deportiva Salamanca, a Spanish football team; Unique Development Studios, a video and computer game developer based in Sweden