ISO 27145-6:2023

INTERNATIONAL ISO
STANDARD 27145-6
Second edition
2023-05
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 2023
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Published in Switzerland
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Contents Page
Foreword .v
Introduction . vi
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 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 and recommendations” . 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 check 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
iii
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
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Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31,
Data communication.
This second edition cancels and replaces the first edition (ISO 27145-6:2015), which has been
technically revised.
The main changes are as follows:
— clarification about cable length;
— rewording for a better clarification of requirements.
A list of all parts in the ISO 27145 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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