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Diagnostic Methodology & Standards

Softing Automotive Demonstrates New Diagnostic Standards at SAE OBD Symposium

An in-depth evaluation of next-generation SAE J1979-2 protocols, Ethernet-based DoIP integration, and software-defined validation architectures.

James Miller
•
September 15, 2026
•
7 min read
• SAE J1979-2 / DoIP
Softing Automotive Demonstrates New Diagnostic Standards at SAE OBD Symposium
Softing Automotive presenting UDS on IP and modernized standard diagnostic data flows at the SAE OBD Symposium.

Evolution from Classic OBD-II to SAE J1979-2 (OBD on UDS)

During the recent SAE OBD Symposium, Softing Automotive presented practical demonstrations focused on the operational transition to SAE J1979-2, widely referred to in engineering circles as OBD on UDS. Classic OBD-II service modes (0x01 through 0x0A) have served emissions monitoring for decades over standard CAN networks. However, modern multi-core domain controllers and high-throughput vehicle networks require a unified diagnostic architecture capable of handling granular telemetry without protocol translation bottlenecks.

Softing demonstrated how their diagnostic toolchains natively interface with 22-based data identifiers (DIDs) and 19-based DTC readout structures defined under ISO 14229-1 and SAE J1979-2. By removing legacy parameter identification constraints, engineering workstations can extract multi-frame freeze frames, extended operational environmental records, and comprehensive readiness indicators across multiple microcontrollers in a single request transaction.

High-Speed DoIP Stack Implementation & Real-World Latency

A central highlight of the symposium demonstration was Diagnostic over Internet Protocol (DoIP, ISO 13400) execution over 100BASE-T1 and 1000BASE-T1 automotive Ethernet links. Softing highlighted telemetry throughput increases exceeding 40 times the maximum payload rate of traditional 500 kbps CAN bus connections. This high data rate allows real-time synchronous parameter sampling across distributed powertrain and energy management modules without causing bus congestion or dropping telemetry frames.

Four Foundational Milestones Demonstrated by Softing

The live test bench demonstrations underscored four essential diagnostic milestones that reshape how development engineers, homologation teams, and calibration specialists audit vehicle networks:

  1. 01
    3-Byte DTC Structure & Status Masking: Implementation of standardized 3-byte fault codes with extended failure mode identifiers (FMIs) and 8-bit status masks, delivering exact fault localization across dual-core engine control modules.
  2. 02
    Unified Service 0x22 / 0x2A Data Streaming: Migration to ReadDataByIdentifier (0x22) and ReadDataByPeriodicIdentifier (0x2A), enabling microsecond-level synchronization between engine speed, air-fuel ratios, and exhaust telemetry.
  3. 03
    Secure Diagnostic Access (ISO 21434 & ISO 15764): Seamless integration of zero-trust certificate authentication for secure diagnostic gateway handshakes without adding communication latency during dynamic dyno runs.
  4. 04
    Hardware-Agnostic VCI Abstraction (ISO 22900 / D-PDU API): Demonstration of modular vehicle communication interfaces utilizing D-PDU APIs, decoupling analytical logging software from underlying proprietary interface hardware.

These protocol demonstrations verify that moving to modernized standard stacks reduces software development overhead while securing reliable data extraction across complex hybrid and electrified powertrain platforms.

Practical Takeaways for Diagnostic & Calibration Engineers

  • Adoption of SAE J1979-2 eliminates legacy 1-byte PID constraints, allowing multi-parameter sampling at higher clock resolutions.
  • DoIP communication structures provide the bandwidth needed for concurrent multi-ECU data recording during dynamic durability and emissions testing.
  • Diagnostic security layers must be built directly into test automation sequences to avoid connection timeouts during locked gateway interrogation.

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Frequently Asked Questions

Classic SAE J1979 relies on fixed service modes (0x01-0x0A) and 2-byte PIDs over CAN. SAE J1979-2 (OBD on UDS) aligns emissions-related diagnostics with ISO 14229-1 Unified Diagnostic Services, utilizing 3-byte DTCs and 2-byte Data Identifiers (DIDs) with support for Ethernet (DoIP) and CAN FD transport layers.

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