Abstract
KEYWORDS - Vehicle Diagnostics, ODX, MVCI, ISO 22900, ISO 22901
The increasing mechatronic content in motor vehicles raises the necessity for efficient diagnostic methods and devices. Due to its nature, vehicle diagnostics are strongly linked with the aspects of data communication and bus systems. Considerable manufacturer specific differences exist in concepts and implementations.
A significant step forward is currently being made with the corresponding standards ISO/DIS 22900 (MVCI: Modular Vehicle Communication Interface) and ISO/DIS 22901 (ODX: Open Diagnostic Data Exchange). MVCI offers convenient interfaces for offboard data communication on a low level (PDU API) as well as on a higher abstraction level (D-Server API) enabling interoperability and exchangeability of components. The ODX data model describes all kinds of diagnostic data with relevance to electronic control units, e. g. trouble codes, identification data and communication parameters.
This paper outlines the importance of these new norms. It describes in brief the technical background and the history of the work leading to the current draft standards ISO/DIS 22900 and ISO/DIS 22901. The universal approach will impact the intra-company workflow as well as cooperation between partners. Functionalities like flash programming of electronic control units exceed the scope of classical diagnostics. New technical options offer a vast potential of opportunities - demanding complex cross-organizational solutions. Technical aspects under consideration and latest developments will be discussed.
Particular emphasis will be placed on practical aspects arisen from the recent months. Problems during current implementations will be described, going from specification uncertainties to logistic issues. A topic of specific interest is the migration of legacy systems. Besides the necessity of securing data consistency and data management in the future, the safeguarding of financial investments is essential.
An overall perspective will be presented by giving a survey of recent activities. Some already implemented examples demonstrate the benefits for OEMs, suppliers, software tool makers, manufacturers of test benches and of production equipment.