It acts as the bridge between the service definitions (Part 1) and the physical network layer.
It defines the interface between UDS and the ISO 15765-2 transport protocol (ISO-TP), which handles the segmentation and reassembly of messages larger than the standard 8-byte CAN frame. iso 142293 pdf
ISO 14229-3 is a standard published by the International Organization for Standardization (ISO) that focuses on the diagnostic communication over Controller Area Network (DoCAN) protocol. The standard is part of the ISO 14229 series, which provides a set of protocols and guidelines for diagnostic communication in automotive systems. Specifically, ISO 14229-3 deals with the implementation of the DoCAN protocol for diagnostic communication. It acts as the bridge between the service