ISO 27145-4:2016

DRAFT INTERNATIONAL STANDARD
ISO/DIS 27145-4
ISO/TC 22/SC 31 Secretariat: DIN
Voting begins on: Voting terminates on:
2015-06-15 2015-08-15
Road vehicles — Implementation of World-Wide
Harmonized On-Board Diagnostics (WWH-OBD)
communication requirements —
Part 4:
Connection between vehicle and test equipment
Véhicules routiers — Mise en application des exigences de communication pour le diagnostic embarqué
harmonisé à l’échelle mondiale (WWH-OBD) —
Partie 4: Connexion entre véhicule et équipement d’essai
ICS: 43.180;43.040.10
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ISO/DIS 27145-4:2015(E)
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

ISO/DIS 27145-4:2015(E)
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ii © ISO 2015 – All rights reserved

ISO/DIS 27145-4:2015(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 2
4 Conventions . 3
5 Document overview. 3
6 Vehicle and external test equipment connection requirements .5
6.1 Overview . 5
6.2 Data link independent requirements . 5
6.3 Support of only one WWH-OBD-compliant external test equipment at a time . 5
7 Wired CAN connection based on ISO 15765-4 . 5
7.1 Network scenario requirements . 5
7.2 Initialization sequence . 5
7.3 ISO 27145-3 WWH-OBD protocol validation sequence . 5
7.4 Application layer — DoCAN . 6
7.5 Presentation layer . 7
7.6 Session layer . 7
7.7 Transport layer . 7
7.8 Network layer . 8
7.9 Data link layer . 8
7.10 Physical layer . 8
7.11 Diagnostic connector . 8
8 Wired Ethernet connection based on ISO 13400 . 9
8.1 Network scenario requirements . 9
8.2 Initialization sequence . 9
8.3 ISO 27145-3 WWH-OBD protocol validation sequence .12
8.4 Application layer — DoIP .14
8.5 Presentation layer .15
8.6 Session layer .15
8.7 Transport layer .16
8.8 Network layer .17
8.9 Data link layer .17
8.10 Physical layer .17
8.11 Diagnostic connector .17
Bibliography .18
ISO/DIS 27145-4:2015(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. 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. 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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 31, Data
communication.
This second edition cancels and replaces the first edition (ISO 27145-4:2012), subclause 7.7.1has been
technically revised.
ISO 27145 consists of the following parts, under the general title Road vehicles — Implementation of
World-Wide Harmonized On-Board Diagnostics (WWH-OBD) communication requirements:
— Part 1: General information and use case definition
— Part 2: Common data dictionary
— Part 3: Common message dictionary
— Part 4: Connection between vehicle and test equipment
— Part 6: External test equipment
iv © ISO 2015 – All rights reserved

ISO/DIS 27145-4:2015(E)
Introduction
0.1  Overview
The ISO 27145- series includes the communication between the vehicle’s on-board diagnostics (OBD)
systems and external test equipment within the scope of the World-Wide Harmonized On-Board
Diagnostics Global Technical Regulations (WWH-OBD GTR).
It has been established in order to apply the unified diagnostic services (specified in ISO 14229-1) to
WWH-OBD systems.
The ISO 27145- series includes the communication between the vehicle’s WWH-OBD systems and external
(off-board) “generic” test equipment within the scope of the country-specific regulatory requirements.
To achieve this, it 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 services specified by ISO 27145 are broken into
— diagnostic services (layer 7), specified in ISO 27145-3 with reference to ISO 14229-1,
— presentation layer (layer 6), specified in ISO 27145-2 with reference to SAE J1930-DA, SAE J1939
Companion Spreadsheet (SPNs), SAE J1939-73:2010, Appendix A (FMIs), SAE J1979-DA, and
SAE J2012-DA,
— session layer services (layer 5), specified in ISO 14229-2,
— transport layer services (layer 4), specified in this part of ISO 27145 with reference to ISO 13400-2,
ISO 15765-2 and ISO 15765-4,
— network layer services (layer 3), specified in this part of ISO 27145 with reference to ISO 15765-4,
ISO 15765-2 and ISO 13400-2,
— data link layer (layer 2), specified in this part of ISO 27145 with reference to ISO 11898-1, ISO 11898-2,
ISO 15765-4, ISO 13400-3 and IEEE 802.3, and
— physical layer (layer 1), specified in this part of ISO 27145 with reference to ISO 11898-1, ISO 11898-2,
ISO 15765-4, ISO 13400-3 and IEEE 802.3,
in accordance with Table 1.
Table 1 — WWH-OBD specification reference applicable to the OSI layers
Applicability OSI 7 layer WWH-OBD document reference
Application (layer 7) ISO 14229-1, ISO 27145-3
Presentation (layer 6) ISO 27145-2,
SAE J1930-DA, SAE J1939 Companion Spreadsheet (SPNs),
SAE J1939–73:2010, Appendix A (FMIs), SAE J1979-DA,
Seven layers
SAE J2012-DA
according to
Session (layer 5) ISO 14229-2
ISO/IEC 7498-1
and ISO/
Transport (layer 4)
ISO 15765-2 DoCAN, ISO 13400-2 DoIP
IEC 10731
ISO 15765-4 DoCAN, TCP and IP
Network (layer 3)
ISO 27145-4
Data link (layer 2) ISO 11898-1 CAN DLL,
ISO 13400-3 DoIP,
ISO 11898-2 CAN HS,
Physical (layer 1) IEEE 802.3
ISO 15765-4 DoCAN
0.2  SAE document reference concept
ISO 27145 makes reference to several SAE documents which contain the terms, data and diagnos
...