ISO 20730-2:2022

Overview

ISO 20730-2:2022 - "Road vehicles - Vehicle interface for electronic Periodic Technical Inspection (ePTI) - Part 2" defines a conformance test plan for the application and communication requirements used during electronic Periodic Technical Inspection (ePTI). The document specifies the test requirements and the expected response behaviour of the System Under Test (SUT) to verify conformance with ISO 20730-1 (application & communication requirements) and ISO 20730-3 (data definitions). Its goal is to ensure repeatable, interoperable test results across different test systems when the test suites and systems comply with this standard.

Key technical topics and requirements

• Scope of testing: Conformance tests for ePTI-relevant systems and associated measurement/control data accessible via the electronic vehicle interface.
• Conformance test groups (CTG): Structured test groups covering key functional areas:
  • CTG_1 - Data link discovery (DoCAN, DoIP)
  • CTG_2 - Authentication (external test equipment and ECU authentication)
  • CTG_3 - Supported identifiers (ECU DIDs, RIDs, IOCT_DIDs)
  • CTG_4 - ePTI-relevant data retrieval (VIN, odometer, software numbers, system status, self-test completion)
  • CTG_5 - ePTI-relevant activation (routines and input/output controls)
• Protocol support: Tests reference diagnostic transport and session protocols such as Diagnostic over CAN (DoCAN) and Diagnostic over IP (DoIP), and UDS application/session services as referenced by ISO 13400-2 and ISO 14229.
• Test system topology and methodology: Follows ISO/IEC 9646-1 conformance testing principles with a Test System (Upper/Lower Tester) and SUT connected via diagnostic link connectors; includes Point of Control and Observation (PCO) for manual operator interactions.
• Environmental and procedural requirements: Specified test temperature range (−20 °C to +40 °C) and mandatory SUT initialisation before each conformance test case (CTC).
• Deterministic results: Specification of test requirements and expected responses to achieve identical results across compliant test systems.

Practical applications

• Ensures interoperability and repeatability of ePTI diagnostic interfaces across vehicle brands and test equipment.
• Enables development and validation of:
  • Diagnostic service tools and ePTI test equipment (DoCAN/DoIP-capable)
  • Vehicle OEM implementations of ePTI interfaces
  • Conformity testing services and certification laboratories
• Supports regulatory and inspection bodies in adopting electronic periodic technical inspection workflows with standardized, verifiable test methods.

Who should use ISO 20730-2:2022

• Vehicle manufacturers (OEMs) implementing ePTI interfaces
• Diagnostic tool and test system vendors
• Test laboratories and certification bodies
• Roadworthiness and vehicle inspection authorities
• Automotive software/ECU integrators and system architects

Related standards

• ISO 20730-1:2021 - ePTI application and communication requirements
• ISO 20730-3:2021 - ePTI data definitions
• ISO 13400-2 - DoIP transport & network services
• ISO 14229-1 / -2 - Unified Diagnostic Services (UDS) application and session layers
• ISO/IEC 9646-1 - Conformance testing principles

Keywords: ISO 20730-2:2022, ePTI, conformance test plan, vehicle interface, DoCAN, DoIP, ECU, UDS, vehicle diagnostic communication, periodic technical inspection.