BS ISO 20730-1:2021

What is ISO 20730-1 about? 

ISO 20730-1 is the first part of multiple series that is applicable to road vehicles, where the electronic vehicle interface is used to perform a test method that is part of a periodic technical inspection (ePTI).  

ISO 20730-1 describes use cases and specifies technical requirements in order to support the ePTI relevant vehicle safety system(s) checks during the periodic technical inspection via the electronic interface.  

ISO 20730-1 reference the ISO 14229 series, the unified diagnostic services implemented on diagnostic communication over controller area network (DoCAN) and the Internet Protocol (DoIP) along with the required provision of data definitions.  

ISO 20730-1 defines all requirements describing the vehicle-communication functionality via the diagnostic link connector related to ePTI and the use cases about the individual vehicle communication functionality, for example, query identification information, command functional test method. 

ISO 20730-1 specifies: 

• Terminology 
• Communication establishment between the ePTI external test equipment and the vehicle's ePTI relevant systems 
• Usage of a credential-based authentication and authorisation mechanism between the ePTI external test equipment and the vehicle 
• Protection against tampering of the defined ePTI methods 

Definition of ePTI-relevant use cases: 

• ePTI external test equipment discovers available data identifier as specified in ISO 20730-3 
• ePTI external test equipment queries the ePTI-relevant system’s information, including software numbers, software integrity information, current and/or stored values, self-test completion status, system status, and error information (e.g., DTC and/or DID information) 
• ePTI external test equipment activates the ePTI-relevant system’s actuators or routines 
• Definition of ePTI-relevant technical requirements 
• ePTI external test equipment minimum requirements 

NOTE- 

ISO 20730-1 does not directly specify any type of test method or pass/fail criteria of the ePTI relevant system during a PTI, but provides data, which may support PTI test methods. 

ISO 20730-1 excludes: 

• Process definitions for performing the PTI check 
• Process and data definitions for off-board data provision 
• Standardised data exchange formats 
• Validation and verification of vehicle safety systems according to vehicle manufacturer specifications 

Who is ISO 20730-1 for?  

ISO 20730-1 on vehicle interface for electronic Periodic Technical Inspection (ePTI) is useful for: 

• Vehicle regulatory authority 
• Road transport industry 
• Mechanical technician 
• Vehicle repair shop 
• Automotive industry 

Why should you use ISO 20730-1?  

Roadworthiness testing is a part of a wider regime designed to ensure that road vehicles are kept in a safe and environmentally acceptable condition during their use. This regime covers periodic roadworthiness testing of vehicles and technical roadside inspections of vehicles used for commercial road transport activities and provides a vehicle registration procedure allowing for the suspension of a vehicle’s authorisation to be used in road traffic where the vehicle constitutes an immediate risk to road safety. Periodic testing is the main tool to ensure roadworthiness. Technical roadside inspections of commercial vehicles are merely complementary to periodic testing. 

An ePTI system list summarises ePTI-relevant systems and specifies a defined name (system), a unique identifier (ePTI system identifier) and a description for each ePTI system. All the definitions in ISO 20730-1 refer to this ePTI system list. 

The ISO 20730 series is based on the Open Systems Interconnection (OSI) basic reference model 

specified in ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. 

ISO 20730-1 defines all requirements describing the vehicle-communication functionality via the diagnostic link connector related to ePTI and the use cases about the individual vehicle communication functionality, for example, query identification information, command functional test method. This helps you ensure the communication functionality at individual vehicle level.