: The standard specifies the physical layer requirements for diagnostic communication, including the use of a 9-pin D-sub connector and a CAN bus with a maximum data rate of 1 Mbit/s.
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ISO 14229-3:2022 - Road vehicles — Unified diagnostic services (UDS) — Part 3: Unified diagnostic services on CAN implementation ( ISO - International Organization for Standardization Unified diagnostic services (UDS) - ISO 14229-3:2012 : The standard specifies the physical layer requirements
ISO 14229-3 is a standard published by the International Organization for Standardization (ISO). The full title of the standard is "Road vehicles - Diagnostic communication over Controller Area Network (DoCAN) - Part 3: Data link layer and application layer". iso 142293 pdf