1 Scope
This part of ISO 15765 specifies a transport protocol and network layer services tailored to meet the requirements
of CAN-based vehicle network systems on controller area networks as specified in ISO 11898. It has been defined in accordance with the diagnostic services established in ISO 14229‑1 and ISO 15031‑5, but is not limited to use with them and is also compatible with most other communication
needs for in-vehicle networks. The protocol specifies an unconfirmed communication.
The diagnostic communication over controller area network (DoCAN) protocol supports the standardized service primitive interface as specified in ISO 14229‑2.
This part of ISO 15765 provides the transport protocol and network layer services to support different application-layer
implementations such as
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— enhanced vehicle diagnostics (emissions-related system diagnostics beyond legislated functionality, non-emissions-related system diagnostics),
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— emissions-related on-board diagnostics (OBD) as specified in ISO 15031, and
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— world-wide harmonized on-board diagnostics (WWH-OBD) as specified in ISO 27145.