It bridges the universal UDS application layer services (ISO 14229-1) with the CAN-specific network layer (ISO 15765-2).

: Defines additional requirements and restrictions for running UDS specifically on CAN networks, ensuring compatibility with the CAN bus's unique frame structures.

It serves as the bridge between the (the diagnostic request/response) and the Data Link/Physical Layers (the CAN frame). Key Features of UDSonCAN:

For breaking down large diagnostic data strings.

ISO 14229-2 (Session layer services)

ISO 14229 is a communication-agnostic diagnostic protocol defined for road vehicles. Unlike earlier standards tied to specific physical layers, such as ISO 14230 (KWP2000) or SAE J1850, UDS operates independently of the underlying bus system. It can be implemented over Controller Area Network (CAN), Ethernet, FlexRay, or LIN. This flexibility allows manufacturers to adopt modern high-speed networks while retaining a uniform diagnostic command set. The standard defines a client-server model where an external test tool (client) communicates with one or more ECUs (servers) using diagnostic requests and responses.

: It references ISO 15765-2 for the transport protocol and ISO 11898-1 for the physical data link layer. Key Services with CAN-Specific Requirements

No. ISO 142293 does not exist. If you meant ISO 14229, it is copyrighted and requires purchase. Free versions are counterfeit.

The or publication year of the standard you are referencing.

ISO 14229-3 is a critical international standard for the automotive industry, defining how are implemented specifically over the Controller Area Network (CAN) . Often referred to as UDSonCAN , this part of the ISO 14229 series ensures that diagnostic tools can communicate seamlessly with a vehicle's Electronic Control Units (ECUs) to detect faults, update firmware, and perform routine testing.

: Unlocks restricted ECU functions through a challenge-response mechanism.