SOVD - Service Oriented Vehicle Diagnostics

New Standard Development
Jun 05 2019
Aug 30, 2019
Sep 2019
May 2022
Jun 2022
Jul 2022

Public Review

All ASAM members are invited to review
the proposal before release


SOVD Public Review




Main Goal of the Project

Definition of a standardized service API for HPC Diagnostics, which includes new HPC-related and conventional diagnostic use-cases.


Problem Description

The primary focus of ECU diagnostic in today's vehicles is on checking the functionality of hardware components, such as sensors, actuators and the ECU. Diagnostic communication then allows to read trouble codes, manage the diagnostic memory, carry out test procedures in the workshop and perform some other operations like parameter changes and software updates. The most widely spread bus system in use is the CAN-bus. First vehicle platforms supporting Ethernet access have entered the market. The most widely spread diagnostic protocol across both bus systems is UDS.


With the introduction of HPCs (high performance computers) to the vehicle network, the diagnostic capabilities of UDS seem to reach its limitations. HPCs have capabilities, which go far beyond those of conventional ECUs:

  • multi-core, multi-threaded computing
  • virtualized ECUs sharing resources on the same hardware
  • high band-width low-latency communication to other HPCs (e.g. via Automotive Ethernet)
  • complex operating systems 
  • complex software and AI-engines

Hence, mechanisms are required to analyze and diagnose not only the hardware aspects of the vehicle network but also the software executing on HPCs.


In addition to HPCs, new connectivity technology enters the market place, that may in the long run obsolete the OBD connector. Wi-Fi and mobile broadband (4G, 5G) allow for remote and OTA (over-the-air) access to the vehicle network, allowing remote Diagnostics, coding, parametrization and re-programming. At the same time, HPCs allow to perform on-board diagnostic tasks without any external access. We thus have to distinguish between use-cases for onboard, proximity and remote Diagnostics, which is a new challenge not covered by today’s prevailing diagnostic stacks. 


Use-Cases for Standardization

ASAM members have proposed three use-cases for HPC Diagnostics standardization, which are given as a starting point for discussion and elaboration for the proposal workshop. 


Use-Case 1: Proximity Diagnostics

The person performing vehicle Diagnostics is close to the vehicle. The Diagnostics system helps the person to detect and localize the fault, e.g. by reading out error codes, sensor/actuator values or debugging information (e.g. log files). He can check the operational status of components (OK/NOK), performing actuations or stimulations and carry out parameter and software updates. 


Use-Case 2: Remote Diagnostics

The vehicle Diagnostics is performed remotely, i.e. over-the-air (OTA Diagnostics). Besides detecting and localizing the fault by a technician, as described in Use-Case 1, there are more operations possible. Roadside assistance may provide remote help with no technician present. A service advisor may prepare the vehicle for service. Information may be retrieved for monitoring purposes, e.g. fuel level, battery health check, etc. Other services are possible, such as remote activation of vehicle functions or fleet management.


Use-Case 3: Onboard Diagnostics
There is no external device or remote application connected to the vehicle and no external operator or application interacts with the vehicle. Instead, diagnostic functions run autonomously within the vehicle, for instance to monitor critical components, carry out predictive or preventive maintenance scenarios and to collect vehicle status information.


Proposal for Standardization

The aim of the standardization proposal is to define and standardize interfaces and services to cover the above use-cases in a flexible architecture, which includes classic Diagnostics for regular ECUs and the additional diagnostic use-cases for one or multiple HPCs. UDS Diagnostics capabilities and OBD-based access must be supported. Proximity and remote Diagnostics shall be supported by a 'public' interface, that is accessible by external devices. Those HPCs with a 'private' interface shall be accessible by external devices via connected HPCs with a 'public' interface, allowing to implement domain- or gateway-network architectures. This is achieved by API-level standardization of the application interfaces of two diagnostic software components running on an HPC:

  1. HPC Diagnostics Service (private and public)
  2. Classic Diagnostic Adapter


The positioning of the software components in a simple central diagnostic access network architecture is shown in the following figure:



Further Information

For further information about the proposal, please download the document HPC Diagnostics - List of Use-Cases for Standardization or review the ASAM SOVD presentation from the last ASAM Technical Seminar.

Participating Companies

  • DSA Daten- und Systemtechnik GmbH
  • BMW AG
  • Mercedes-Benz Group AG
  • Ford Motor Company
  • Jaguar Land Rover
  • General Motors Company
  • Porsche AG
  • Continental AG
  • Robert Bosch GmbH
  • ZF Friedrichshafen AG
  • Gangolf Feiter - Concepts & Services Consulting
  • KPIT Technologies GmbH
  • Luxoft GmbH
  • RA Consulting GmbH
  • Siemens AG
  • Softing Automotive Electronics GmbH
  • Vector Informatik GmbH
  • Carmeq GmbH
  • Tata Consultancy Services


Public Review

All ASAM members are invited to review
the proposal before release


SOVD Public Review




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