ISO 20730-1:2021

Road vehicles — Vehicle interface for electronic Periodic Technical Inspection (ePTI) — Part 1: Application and communication requirements

This document 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). This document 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. This document references 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. The technical requirements of diagnostic services and data definitions of emissions-related systems are specified in other International Standards, for example, ISO 15031 and ISO 27145. Other environmental systems' ePTI use cases and technical requirements can be considered in the future. This document defines: — all requirements describing the vehicle-communication functionality via the diagnostic link connector related to ePTI, for example: 1) discovery of the ePTI data link; 2) discovery of the ePTI-relevant systems; 3) query of ePTI-relevant systems’ information, including software identification, software integrity, current and/or stored values; 4) query of ePTI-relevant systems’ error information; 5) activation of ePTI-relevant systems’ actuators or routines; — the use cases about the individual vehicle communication functionality, for example, query identification information, command functional test method. This document 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. The document specifies: — terminology; — communication establishment between the ePTI external test equipment and the vehicle's ePTI-relevant systems; — usage of a credentials-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. This document 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.

Véhicules routiers — Interface de véhicule pour contrôle technique périodique électronique (ePTI) — Partie 1: Exigences d’application et de communication

General Information

• Status: Published
• Publication Date: 20-Apr-2021
• ICS: 43.180 - Diagnostic, maintenance and test equipment
• Technical Committee: ISO/TC 22/SC 31 - Data communication
• Drafting Committee: ISO/TC 22/SC 31/WG 7 - Electronic periodic technical inspection (ePTI)
• Current Stage: 6060 - International Standard published
• Start Date: 21-Apr-2021
• Completion Date: 21-Apr-2021

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20730-1
First edition
2021-04
Road vehicles — Vehicle interface
for electronic Periodic Technical
Inspection (ePTI) —
Part 1:
Application and communication
requirements
Véhicules routiers — Interface de véhicule pour contrôle technique
périodique électronique (ePTI) —
Partie 1: Exigences d’application et de communication
Reference number
ISO 20730-1:2021(E)
©
ISO 2021

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ISO 20730-1:2021(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
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Published in Switzerland
ii © ISO 2021 – All rights reserved

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ISO 20730-1:2021(E)

Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 3
4 Symbols and abbreviated terms . 5
5 How to read this document . 5
5.1 Layout of the document . 5
5.2 Use case structure explanation . 6
5.3 Requirements statement structure . 6
5.4 ePTI application example . 7
6 ePTI inspection modules and use cases overview and principles .8
6.1 Basic principles. 8
6.2 ePTI inspection modules . 9
7 IM-1 – Discover ePTI data link and ePTI-relevant system(s) . 9
7.1 UC 1.1 – Discover ePTI data link . 9
7.2 UC 1.2 – Discover ePTI-relevant system(s) .10
8 IM-2 – Authentication, authorisation .10
8.1 UC 2.1 – ePTI external test equipment authentication .10
8.2 UC 2.2 – Vehicle ECU authentication .11
9 IM-3 – Query available ePTI identifier(s) .11
9.1 UC 3.1 – Query supported data identifier(s) .11
9.2 UC 3.2 – Query supported routine identifier(s) .12
9.3 UC 3.3 – Query supported input/output control identifier(s) .12
10 IM-4 – Query ePTI system information .13
10.1 UC 4.1 – Query vehicle identification number .13
10.2 UC 4.2 – Query vehicle odometer value .13
10.3 UC 4.3 – Query system's software number .13
10.4 UC 4.4 – Identify installed system's software integrity information .14
10.5 UC 4.5 – Query information from system .14
11 IM-5 – Query system's self-test completion and error information .15
11.1 UC 5.1 – Query system's self-test completion status .15
11.2 UC 5.2 – Query system status and error information .15
12 IM-6 – Activate system's routines, input/output control(s) .16
12.1 UC 6.1 – Activate system's routine(s) .16
12.2 UC 6.2 – Activate system's input/output control(s) .16
13 Overview of vehicle system requirements .17
13.1 ePTI external test equipment and vehicle message exchange sequence .17
13.2 Technical requirements and use case coverage .17
14 Application (APP) .18
14.1 Setup vehicle's DoCAN data link framework .18
14.2 Setup vehicle's DoIP data link framework .20
14.3 Choice of DoCAN and DoIP data link in the vehicle .22
15 Application layer (AL) .22
15.1 Applicable ISO 14229-1 UDS functionality .22
15.2 Authentication .23
15.2.1 Requirements definition — ePTI external test equipment authentication .23
15.2.2 Requirements definition — ECU authentication .24
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15.3 ReadDataByIdentifier — Report ePTI-relevant system(s) .24
15.3.1 Requirements definition — Report ePTI-relevant system(s) .24
15.3.2 Message sequence implementation requirements — Report ePTI-relevant
system(s) .24
15.3.3 Example of the message sequence — Report ePTI-relevant system(s) .25
15.4 ReadDataByIdentifier — Report ECU supported data identifier(s) .26
15.4.1 Requirements definition — Report ECU supported data identifier(s) .26
15.4.2 Message sequence implementation requirements — Report ECU
supported data identifier(s) .27
15.4.3 Example of the message sequence — Report ECU supported data identifier(s) .27
15.5 ReadDataByIdentifier — Report ECU supported routine identifier(s) .28
15.5.1 Requirements definition — Report ECU supported routine identifier(s).28
15.5.2 Message sequence implementation requirements — Report ECU
supported routine identifier(s) .28
15.5.3 Example of the message sequence — Report ECU supported routine
identifier(s) .29
15.6 ReadDataByIdentifier — Report ECU supported input/output control identifier(s) .29
15.6.1 Requirements definition — Report ECU supported input/output control
identifier(s) .29
15.6.2 Message sequence implementation requirements — Report ECU
supported input/output control identifier(s) .30
15.6.3 Example of the message sequence — Report ECU supported input/output
control identifier(s) .30
15.7 ReadDataByIdentifier — Report VIN from ECU .30
15.7.1 Requirements definition — Report VIN from ECU .30
15.7.2 Message sequence implementation requirements — Report VIN from ECU .31
15.7.3 Example of the message sequence — Report VIN from ECU .31
15.8 ReadDataByIdentifier — Report vehicle odometer value .32
15.8.1 Requirements definition — Report vehicle odometer value .32
15.8.2 Message sequence implementation requirements — Report vehicle
odometer value .32
15.8.3 Example of the message sequence — Report vehicle odometer value .33
15.9 ReadDataByIdentifier — Report vehicle's system software number(s) .33
15.9.1 Requirements definition — Report vehicle's system software number(s) .33
15.9.2 Message sequence implementation requirements — Report vehicle's
system software number(s) .34
15.10 ReadDataByIdentifier — Report information from system .34
15.10.1 Requirements definition — Report information from system .34
15.10.2 Message sequence implementation requirements — Report information
from system .35
15.10.3 Example of the message sequence — Report information from system .35
15.11 ReadDataByIdentifier — Report vehicle's ePTI system self-test completion and
system status .35
15.11.1 Requirements definition — Report vehicle's ePTI system self-test
completion and system status .35
15.11.2 Message sequence implementation requirements — Report vehicle's ePTI
system self-test completion and system status .36
15.11.3 Example of the message sequence — Report vehicle's ePTI system self-
test completion and system status .37
15.12 RoutineControl — Activate system's routines .37
15.12.1 Requirements definition — Activate system's routines .37
15.12.2 Message sequence implementation requirements — Activate system's
routines .39
15.12.3 Example of the message sequence — Activate system's routines exterior lights .39
15.13 InputOutputControlByIdentifier — Activate system's input/output controls .39
15.13.1 Requirements definition — Activate system's input/output controls .39
15.13.2 Message sequence implementation requirements — Activate system's
input/output controls .41
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15.13.3 Example of the message sequence — Activate system's input/output controls .41
16 Session layer (SL) .41
Bibliography .42
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ISO 20730-1:2021(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31,
Data communication.
A list of all parts in the ISO 20730 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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ISO 20730-1:2021(E)

Introduction
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, which is defined in ISO 20730-3, 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 this document 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. When mapped on this model, the application protocol and data link framework requirements
specified/referenced in the ISO 20730 series are structured according to Figure 1.
Figure 1 illustrates a standard-based documentation concept, which consists of the following main
clusters:
— vehicle diagnostic communication framework: covers all relevant basic vehicle diagnostic
communication specifications of OSI layers 7, 6 and 5;
— vehicle diagnostic communication use case framework: covers the master specification, which
specifies the use cases and requirements of the subject matter of OSI layer 7;
— presentation layer framework: covers all data relevant specifications of OSI layer 6;
— conformance test plan: covers the conformance test plan requirements of the use cases and
communication requirements of OSI layers 7, 6 and 5;
— lower OSI layer framework: covers all vehicle diagnostic protocol standards of OSI layers 4, 3, 2 and
1, which are relevant and referenced by the use case specific standard.
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ISO 20730-1:2021(E)

Figure 1 — ePTI document reference according to OSI model
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INTERNATIONAL STANDARD ISO 20730-1:2021(E)
Road vehicles — Vehicle interface for electronic Periodic
Technical Inspection (ePTI) —
Part 1:
Application and communication requirements
1 Scope
This document 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).
This document 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. This document references 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.
The technical requirements of diagnostic services and data definitions of emissions-related systems are
specified in other International Standards, for example, ISO 15031 and ISO 27145. Other environmental
systems' ePTI use cases and technical requirements can be considered in the future.
This document defines:
— all requirements describing the vehicle-communication functionality via the diagnostic link
connector related to ePTI, for example:
1) discovery of the ePTI data link;
2) discovery of the ePTI-relevant systems;
3) query of ePTI-relevant systems’ information, including software identification, software
integrity, current and/or stored values;
4) query of ePTI-relevant systems’ error information;
5) activation of ePTI-relevant systems’ actuators or routines;
— the use cases about the individual vehicle communication functionality, for example, query
identification information, command functional test method.
This document 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.
The document specifies:
— terminology;
— communication establishment between the ePTI external test equipment and the vehicle's ePTI-
relevant systems;
— usage of a credentials-based authentication and authorisation mechanism between the ePTI
external test equipment and the vehicle;
— protection against tampering of the defined ePTI methods;
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ISO 20730-1:2021(E)

— 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.
This document 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11898-1, Road vehicles — Controller area network (CAN) — Part 1: Data link layer and physical
signalling
ISO 11898-2, Road vehicles — Controller area network (CAN) — Part 2: High-speed medium access unit
ISO 13400-2, Road vehicles — Diagnostic communication over Internet Protocol (DoIP) — Part 2: Transport
protocol and network layer services
ISO 13400-3, Road vehicles — Diagnostic communication over Internet Protocol (DoIP) — Part 3: Wired
vehicle interface based on IEEE 802.3
ISO 13400-4, Road vehicles — Diagnostic communication over Internet Protocol (DoIP) — Part 4: Ethernet-
based high-speed data link connector
ISO 14229-1, Road vehicles — Unified diagnostic services (UDS) — Part 1: Application layer
ISO 14229-2, Road vehicles — Unified diagnostic services (UDS) — Part 2: Session layer services
ISO 14229-3, Road vehicles — Unified diagnostic services (UDS) — Part 3: Unified diagnostic services on
CAN implementation (UDSonCAN)
ISO 14229-5, Road vehicles — Unified diagnostic services (UDS) — Part 5: Unified diagnostic services on
Internet Protocol implementation (UDSonIP)
ISO 15031-3, Road vehicles — Communication between vehicle and external equipment for emissions-
related diagnostics — Part 3: Diagnostic connector and related electrical circuits: Specification and use
ISO 15765-2, Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 2:
Transport protocol and network layer services
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1)
ISO 15765-5 , Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) —
Part 5: Specification for an in-vehicle network connected to the diagnostic link connector
ISO 19689, Motorcycles and mopeds — Communication between vehicle and external equipment for
diagnostics — Diagnostic connector and related electrical circuits, specification and use
2)
ISO 20730-3 , Road vehicles — Vehicle interface for electronic Periodic Technical Inspection (ePTI) —
Part 3: Data definitions
SAE J1939-13, Off-Board Diagnostic Connector
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14229-1 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
credentials
data that are transferred to establish the claimed identity of an entity
[SOURCE: ISO/IEC 2382:2015, 2126254, modified — The notes to entry have been deleted.]
3.2
electronic periodic technical inspection
ePTI
standardised communication functionality utilising the electronic vehicle communication interface
supporting the PTI (3.8)
3.3
ePTI external test equipment
test system external to the vehicle's diagnostic link connector, which uses serial communication to
perform ePTI-relevant system (3.4) assessments, measurements and control functions
3.4
ePTI-relevant system
system which is able to perform a function required to be tested during the PTI (3.8)
Note 1 to entry: The ePTI system list (3.6), which is defined in ISO 20730-3, summarises safety-relevant systems
which may be part of a PTI test.
Note 2 to entry: An ePTI-relevant system (3.4) consists of one or multiple ECUs with dedicated sensors and
actuators.
3.5
ePTI inspection module
container of one or more use cases related to the same subject
1) Under preparation. Stage at the time of publication: ISO/FDIS 15765-5:2021.
2) Under preparation. Stage at the time of publication: ISO/DIS 20730-3:2021.
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3.6
ePTI system list
list of ePTI-relevant systems (3.4)
Note 1 to entry: It contains a basis of defined electronic systems to be tested via the electronic vehicle interface
as part of the PTI (3.8). The ePTI system list (3.6) specifies a defined name (system), a unique ID (ePTI system ID)
and a description for each ePTI-relevant system.
3.7
ePTI system identifier
unique identifier for an ePTI-relevant system (3.4)
3.8
periodic technical inspection
PTI
roadworthiness testing at predefined intervals and authorized test facilities
N
...