ISO 20077-1:2017

Overview

ISO 20077-1:2017 - Road Vehicles - Extended vehicle (ExVe) methodology - Part 1: General information - defines the concepts and terms for the extended vehicle (ExVe) concept. It presents general information, establishes dedicated terminology (diagnostics, prognostics, off‑board systems, use cases, etc.), and describes how ExVe relates to other standards. The scope covers road vehicles with four or more wheels in UN categories 1 and 2 (TRANS/WP.29/1045) while excluding the detailed specification of interfaces and external devices.

Key topics and technical requirements

• Terminology and concepts: formal definitions for diagnosis, diagnostics step 1/2, prognosis/prognostics, malfunction, off‑board system, remote diagnostics, use case, use case cluster, and web service.
• Extended vehicle definition: the ExVe is the vehicle plus off‑board systems, external interfaces and the data communications linking them - still conforming to the vehicle manufacturer’s specifications.
• Design constraints and expected use areas: high‑level guidance on constraints when designing ExVe solutions and typical application areas (e.g., remote diagnostics, fleet management, cooperative ITS).
• Interrelation with other standards: mapping of ExVe concepts to ISO standards and related work (summary of the ISO 20077 series content).
• Practical illustrations: annexes provide example diagnostic/prognostic cases (e.g., air conditioning malfunction) and guidance for designing ExVe for remote diagnostics.

Note: ISO 20077-1 defines terminology and methodology context - it does not specify interface message formats or hardware details.

Practical applications and who uses this standard

ISO 20077-1 is intended for stakeholders involved in vehicle connectivity, telematics and diagnostic ecosystems:

• Vehicle manufacturers (OEMs) designing ExVe architectures and issuing functional requirements.
• Telematics and off‑board system developers implementing remote diagnostics, remote support and related services.
• Aftermarket diagnostic tool vendors and remote diagnosticians using standardized use cases and diagnostic support information.
• Fleet managers and service organizations adopting remote diagnostics and fleet management workflows.
• Standards developers and regulators aligning terminology and ensuring interoperability between on‑board and off‑board systems.

This standard supports safer, interoperable remote diagnostics and prognostics, and enables consistent design of ExVe solutions across suppliers.

Related standards and references

• ISO 20077 series - Part 1 (this document) and ISO 20077-2 (methodology for designing the extended vehicle).
• ISO 18541-1 - referenced for diagnostic support concepts.
• ISO projects such as ISO 20080 (example: remote diagnostics) and UN documents (United Nations Special Resolution No.1 TRANS/WP.29/1045) are cited for vehicle categories.

Keywords: ISO 20077-1, extended vehicle, ExVe methodology, remote diagnostics, vehicle diagnostics, prognostics, telematics, off‑board systems, use case clusters.