ISO 27145-2:2012/Amd 1:2023

Overview

ISO 27145-2:2012/Amd 1:2023 is an important amendment to the international standard focused on the Implementation of World-Wide Harmonized On-Board Diagnostics (WWH-OBD) communication requirements for road vehicles. This amendment updates Part 2: Common Data Dictionary, refining communication protocols and data definitions essential for global harmonization of vehicle diagnostics.

The standard is developed by ISO Technical Committee ISO/TC 22 (Road vehicles), Subcommittee SC 31 (Data communication). It ensures consistent, reliable diagnostic data exchange across various vehicle systems, supporting regulatory and environmental compliance worldwide.

Key Topics

• Updated Normative References:
  The amendment replaces the previous reference “SAE J1939, Companion Spreadsheet” with “SAE J1939-DA, Digital Annex of serial control and communication heavy duty vehicle network data.” This update aligns the communication framework with the latest heavy-duty vehicle network standards.

• New Definition Guidelines for DID Assignments (Clause 6.3):
  Introduction of guidelines for defining new Diagnostic Identifier (DID) assignments to maintain coherence and compatibility in data coding and diagnostics.

• GTR WWH-OBD Emissions System Parameters (Clause 6.4):
  Defines emissions-related system parameters essential for Global Technical Regulation (GTR) compliance within WWH-OBD frameworks to enhance environmental monitoring effectiveness.

• DTCExtendedDataRecord Content Definition (Clause 8.3):
  Specifies the data record content for extended diagnostic trouble code (DTC) information. For instance, the "FailureSpecificB1Counter" parameter measures the active hours of a specific failure, enabling precise diagnostic reporting.

• Revisions of Annexes:
  Several annexes were deleted or restructured to streamline content, including removal of Annex A and Annex B, and relocation of Annex D content into the main body under Clause 8.3.

Applications

This ISO amendment has practical importance in various automotive and related sectors including:

• Vehicle Manufacturers:
  Facilitates consistent implementation of onboard diagnostics communication, helping manufacturers meet international regulatory requirements and improve diagnostic accuracy.

• Emissions Testing and Regulatory Compliance:
  Supports global harmonization of emissions diagnostics, essential for monitoring and controlling vehicle pollution levels in compliance with GTR and environmental legislation.

• Diagnostic Tool Developers:
  Provides clear definitions and updated protocols for creating universal diagnostic tools and interfaces, ensuring interoperability across makes and markets.

• Fleet Operators and Service Providers:
  Enhances the ability to monitor vehicle health and emissions through standardized, reliable on-board data, improving maintenance decisions and reducing downtime.

Related Standards

• ISO 27145 Series:
  This amendment is part of the broader ISO 27145 series which covers various aspects of WWH-OBD data communication requirements.

• SAE J1939-DA:
  The referenced digital annex standard critical for serial control and communication protocols in heavy-duty vehicle networks.

• Global Technical Regulation (GTR) on WWH-OBD:
  Provides framework regulations harmonizing on-board diagnostic systems across global markets.

• ISO/IEC Directives:
  Governs the editorial and maintenance procedures for developing and updating ISO standards, ensuring consistency and quality compliance.

Keywords: ISO 27145-2 amendment, WWH-OBD communication, common data dictionary, vehicle diagnostics standard, on-board diagnostics, emissions system parameters, SAE J1939-DA, diagnostic trouble codes, vehicle diagnostics interoperability, global automotive standards