ISO 15031-3:2023

INTERNATIONAL ISO
STANDARD 15031-3
Third edition
2023-02
Road vehicles — Communication
between vehicle and external
equipment for emissions-related
diagnostics —
Part 3:
Diagnostic connector and related
electrical circuits: Specification and
use
Véhicules routiers — Communications entre un véhicule et un
équipement externe pour le diagnostic relatif aux émissions —
Partie 3: Connecteur de diagnostic et circuits électriques associés:
spécifications et utilisation
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms . 1
5 Conventions . 2
6 Technical requirements overview . 2
7 Physical layer . 2
7.1 PM – Data link connector (DLC) requirements . 2
7.1.1 PM – RHD vehicle DLC system performance requirements . 2
7.1.2 PM – RHD vehicle DLC location and position . 2
7.1.3 PM – RHD vehicle DLC securely mounted . 2
7.1.4 PM – RHD vehicle DLC mounting direction and tolerance . 2
7.2 PM – DLC Ethernet support layout . 3
7.3 PM – ACL for on-board pyrotechnic devices . 3
Bibliography . 4
iii
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
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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 third edition cancels and replaces the second edition (ISO 15031-3:2016), which has been
technically revised.
The main changes are as follows:
— restructuration of the document;
— introduction of requirement numbers, names and definitions;
— update of the dated references to SAE J1962:201607.
A list of all parts in the ISO 15031 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.
iv
Introduction
The ISO 15031 series consists of a number of parts which, taken together, provide a coherent self-
consistent set of specifications to facilitate emissions-related diagnostics. ISO 15031-1 provides
an overview about communication between vehicle and external equipment for emissions-related
diagnostics. ISO 15031-2 through ISO 15031-7 are based on SAE recommended practices. This document
is based on SAE J1962 (diagnostic connector).
The first edition of this document was based on SAE J1962 and was inte
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