Glossary · Vehicle Networks

UDS

Also known as: Unified Diagnostic Services, ISO 14229

Definition

UDS: Unified Diagnostic Services (ISO 14229) — standard ECU diagnostic and reprogramming protocol. UDS defines services for ECU identification, security access (0x27), authentication (0x29), routine control (0x31), reading and writing data, fault management, and ECU reprogramming (0x34/0x36/0x37).

Where this matters: Embedded Software Engineering

It is the protocol behind workshop tools and OEM end-of-line testers, and the foundation that secure diagnostics builds on.

Related terms

Secure Diagnostics
Authenticated and authorised UDS / OBD diagnostic operations on ECUs.
Secure Flashing
Authenticated and integrity-checked update of ECU firmware.

Need help applying UDS on a programme? Use the contact form to reach Agnile’s engineering team.

UDS

Definition

Secure Diagnostics

Secure Flashing