ISO 18541-1:2021

Overview

ISO 18541-1:2021 - "Road vehicles - Standardized access to automotive repair and maintenance information (RMI) - Part 1" provides the general framework, structure and use-case definitions for standardized access to automotive repair and maintenance information (RMI). As the first part of the ISO 18541 series, it describes real-world scenarios (roadside assistance, inspection, diagnosis, repair, maintenance and ECU updating/replacement) and defines requirements for controlled access to security‑related RMI using the SERMI scheme. The document applies to light passenger and light commercial vehicles and focuses on web‑based RMI systems, contact information, and a security framework to protect sensitive vehicle data.

Key topics and technical requirements

• Use case taxonomy: Detailed use cases (UC 1–UC 11) covering authentication/authorization, payment, vehicle identification, information selection, retrieval of documents (workshop procedures, wiring diagrams, TSBs, recalls, maintenance schedules, spare parts, labour times), diagnostics, ECU updating/tuning, electronic maintenance history, technical support and training.
• Access control & security: Definitions of access levels and requirements for granting access to security‑related RMI (Annex A implements the SERMI approach).
• User and system models: Roles and flows for independent operators (IO), their employees, and vehicle manufacturer (VM) RMI systems - including registration, login, administration and deletion requests.
• Vehicle identification methods: VIN-based identification and product-feature based identification to locate correct RMI.
• RMI delivery model: Emphasis on a web‑based RMI system, standardized search/navigation, document identifiers and contact information for specific RMI providers.
• Interoperability references: Normative references include ISO 18541-2 (technical requirements) and ISO/IEC 9594-8 for public key and certificate frameworks.

Practical applications and users

Who benefits:

• Independent repair shops and technicians - consistent, secure access to manufacturer RMI for diagnosis, repair, parts and labour estimates.
• Vehicle manufacturers and OEMs - standardized publication and controlled distribution of RMI and security‑sensitive information.
• Roadside assistance providers and inspectors - quick retrieval of procedures, recalls and diagnostic guidance.
• Tool and diagnostic equipment vendors, training organizations and parts suppliers - integration with RMI contact points, tool validation and training materials.

Practical uses:

• Securely obtaining wiring diagrams or ECU reprogramming instructions.
• VIN-based retrieval of maintenance schedules and recall notices.
• Standardized workflows for registration, authentication and paid access to RMI.

Related standards

• ISO 18541-2: Road vehicles - Standardized access to automotive RMI - Part 2: Technical requirements (details technical implementations).
• ISO/IEC 9594-8: Directory - Public key and attribute certificate frameworks (used for security/authentication).

Keywords: ISO 18541-1, RMI, automotive repair and maintenance information, SERMI, ECU update, VIN identification, web-based RMI, vehicle diagnostics, standardized access.