ISO 27145-6:2015

INTERNATIONAL ISO
STANDARD 27145-6
First edition
2015-04-01
Road vehicles — Implementation
of World-Wide Harmonized On-
Board Diagnostics (WWH-OBD)
communication requirements —
Part 6:
External test equipment
Véhicules routiers — Mise en application des exigences de
communication pour le diagnostic embarqué harmonisé à l’échelle
mondiale (WWH-OBD) —
Partie 6: Équipement d’essai externe
Reference number
©
ISO 2015
© ISO 2015
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Published in Switzerland
ii © ISO 2015 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols, and abbreviated terms . 2
3.1 Terms and definitions . 2
3.2 Abbreviated terms . 2
4 Conventions . 3
5 Document overview. 3
6 Requirements overview and principles . 5
6.1 Basic principles for the graphical notation. 5
6.2 Requirements clustering . 5
6.2.1 Overview . 5
6.2.2 Main requirements clusters . 5
7 External test equipment requirements . 7
7.1 General . 7
7.2 Applicability of requirements according to local legislation . . 8
7.3 User instructions and guidelines . 8
7.4 Cluster “Mechanical requirements” . 8
7.5 Cluster “Electrical requirements” . 9
7.6 Cluster “Communication setup” and connections . 9
7.6.1 Connections . 9
7.6.2 Communication setup .10
7.7 Cluster “Diagnostic messages” .12
7.7.1 Overview .12
7.7.2 Timing .12
7.7.3 Negative response handling .12
7.7.4 Error handling of no response from the vehicle .14
7.7.5 Setup of ECU list .15
7.7.6 Setting up ECU communication list .16
7.7.7 Setting up data information list .16
7.7.8 Reading DTCs .17
7.7.9 Setting up DTC information list .17
7.7.10 Clear diagnostic information .22
7.7.11 Continuously reading ECU data .22
8 Roadside inspection test equipment .23
8.1 Definition .23
8.2 Related use cases.23
8.3 Implementation requirements .24
8.3.1 Overview .24
8.3.2 Application layer .24
9 Inspection and maintenance (I/M) test equipment .25
9.1 Definition .25
9.2 Related use cases.25
9.3 Implementation requirements .25
9.3.1 General.25
9.3.2 Application layer .25
10 Repair shop test equipment .27
10.1 Definition .27
10.2 Related use cases.27
10.3 Implementation requirements .27
10.3.1 Overview .27
10.3.2 Application layer .28
11 Multiple test equipment communication .31
11.1 General .31
11.2 Behaviour of external test equipment .31
Bibliography .32
iv © ISO 2015 – All rights reserved

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 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 3, Electrical
and electronic equipment.
ISO 27145 consists of the following parts, under the general title Road vehicles — Implementation of
Word-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
Introduction
Overview
This International Standard 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).
This International Standard has been established in order to apply the unified diagnostic services
(
...