Full Title: Road vehicles — Unified diagnostic services (UDS) — Specification and requirements
Part Structure:
To understand Part 3, you must understand that it relies heavily on ISO 15765-2 (often called the Network Layer or "TP" - Transport Protocol).
UDS messages can be very long, but CAN frames are limited (usually 8 bytes of data). ISO 14229-3 defines how to segment large diagnostic messages into small CAN frames. iso 142293 pdf
Note: I assume you mean ISO 14229 (Unified Diagnostic Services, UDS). ISO 14229-3 is one part of that series; if you meant a different part, say which and I’ll adjust.
Older search results may return a committee draft (CD) or final draft international standard (FDIS). These are not valid for certification or compliance. Always use the "Published" version (e.g., ISO 14229:2020).
ISO 14229-3 is the "packaging layer" for UDS on CAN. Full Title: Road vehicles — Unified diagnostic services
Without Part 3, UDS services (Part 1) cannot physically fit onto a standard CAN bus network.
I notice you're asking for an essay on "ISO 142293" — but there is no ISO standard with that exact number. You may be referring to:
Since the most likely intention is ISO 14229 (UDS) — widely used in automotive diagnostics — I’ll provide a solid academic-style essay on that standard. If you meant another, just let me know and I’ll revise it completely. Without Part 3, UDS services (Part 1) cannot
Which deliverable would you like?
A: No. ISO 142293 does not exist. If you meant ISO 14229, it is copyrighted and requires purchase. Free versions are counterfeit.
If you develop automotive ECUs (Engine Control Units), diagnostics tools, or onboard telematics, ISO 14229 defines how to: