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ISO 15765-4:2016

(Main)

Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems

Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems

ISO 15765-4:2016 specifies requirements for Controller Area Networks (CAN) where one or more controllers comply with on-board diagnostics (OBD) or world-wide harmonized on-board diagnostics (WWH‑OBD) regulations. The network presumes the use of an external test equipment for inspection and repair diagnostics, as defined by the regulations. The CAN network requirements for the vehicle and the external test equipment are based on the specifications of ISO 15765-2, ISO 11898-1 and ISO 11898-2. ISO 15765-4:2016 places restrictions on those International Standards for the fulfilment of the regulations. It does not specify in-vehicle CAN bus architecture, but seeks to ensure that the vehicle's regulated CAN communications comply with external test equipment requirements. ISO 15765-4:2016 defines the requirements to successfully establish, maintain and terminate communication with a vehicle that implements the requirements of the OBD/WWH-OBD regulations. Plug‑and-play communication capabilities among vehicles and test equipment are defined to assure the interoperation of external test equipment and vehicles. This part of ISO 15765 details all of the OSI layer requirements to achieve this goal. ISO 15765-4:2016 is the entry point for DoCAN (Diagnostic communication over Controller Area Network). Based on the results of the initialization, the external test equipment determines which protocol and diagnostic services are supported by the vehicle's emissions-related system: - legislated OBD: ISO 15031 (all parts); - legislated WWH-OBD: ISO 27145 (all parts).

Véhicules routiers — Diagnostic sur gestionnaire de réseau de communication (DoCAN) — Partie 4: Exigences applicables aux systèmes associés aux émissions

General Information

Status
Withdrawn
Publication Date
11-Apr-2016
Withdrawal Date
11-Apr-2016
ICS
43.040.15 - Car informatics. On board computer systems
43.180 - Diagnostic, maintenance and test equipment
Technical Committee
ISO/TC 22/SC 31 - Data communication
Drafting Committee
ISO/TC 22/SC 31/WG 2 - Vehicle diagnostic protocols
Current Stage
9599 - Withdrawal of International Standard
Start Date
30-Jul-2021
Completion Date
30-Jul-2021
Ref Project

Relations

Consolidated By
ISO 5402-1:2022 - Leather — Determination of flex resistance — Part 1: Flexometer method
Effective Date
06-Jun-2022
Revised
ISO 15765-4:2021 - Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems
Effective Date
23-Apr-2020
Revises
ISO 15765-4:2011 - Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems
Effective Date
16-Aug-2014
Revises
ISO 15765-4:2011/Amd 1:2013 - Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 4: Requirements for emissions-related systems — Amendment 1
Effective Date
16-Aug-2014

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DRAFT INTERNATIONAL STANDARD
ISO/DIS 15765-4
ISO/TC 22/SC 3 Secretariat: DIN
Voting begins on: Voting terminates on:
2015-03-19 2015-06-19
Road vehicles — Diagnostic communication over
Controller Area Network (DoCAN) —
Part 4:
Requirements for emissions-related systems
Véhicules routiers — Diagnostic sur gestionnaire de réseau de communication (DoCAN) —
PartieParte 4: Exigences applicables aux systèmes associés aux émissions
ICS: 43.040.15
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 15765-4:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

ISO/DIS 15765-4:2015(E)
© ISO 2015
All rights reserved. Unless otherwise specified, 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 below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved

ISO/DIS 15765-4
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 Symbols . 2
3.3 Abbreviated terms . 3
4 Conventions . 3
5 Document overview . 4
6 External test equipment initialization sequence . 5
6.1 General . 5
6.2 Baudrate validation procedure . 7
6.2.1 BaudrateRecord . 7
6.2.2 Baudrate validation . 7
6.2.3 External test equipment error detection provisions . 9
6.3 CAN identifier validation procedure . 9
6.3.1 CAN identifier validation procedure OBD . 9
6.3.2 CAN identifier validation procedure WWH-OBD . 11
7 Application layer . 13
8 Session layer . 14
9 Transport protocol layer . 14
10 Network layer . 14
10.1 General . 14
10.2 Network layer parameters. 14
10.2.1 Timing parameter values . 14
10.2.2 Definition of Flow Control parameter values . 15
10.2.3 Maximum number of legislated OBD/WWH-OBD ECUs . 16
10.3 Addressing formats . 17
10.3.1 Normal and fixed addressing format . 17
10.3.2 Functional addressing . 17
10.3.3 Physical addressing . 17
10.4 CAN identifier requirements . 18
10.4.1 External test equipment . 18
10.4.2 Legislated OBD/WWH-OBD server/ECU . 18
10.5 Mapping of diagnostic addresses . 19
10.5.1 Legislated OBD/WWH-OBD CAN identifiers . 19
10.5.2 11 bit CAN identifiers . 20
10.5.3 29 bit CAN identifiers . 20
10.6 Support of ECUNAME reporting . 21
11 Each legislated OBD-compliant server/ECU, which responds to external test equipment
compliant to either ISO 15031-4/SAE J1978 or ISO 27145-6 requests, is required to
support the InfoType "ECUNAME" (see SAE J1979-DA). The mapping between a
server/ECU address and the name (ECUNAME) of the server/ECU shall be performed by
the external test equipment. This requirement is intended to replace the recommendation
from Table 8 in ISO 15765-4 referencing SAE J2178.Data link layer . 21
ISO/DIS 15765-4
12 Physical layer . 21
12.1 General . 21
12.2 External test equipment baudrates . 21
12.3 External test equipment CAN bit timing . 22
12.3.1 CAN bit timing parameter values . 22
12.3.2 Nominal baudrate 250 kBit/s . 23
12.3.3 Nominal baudrate 500 kBit/s . 23
12.4 External test equipment . 24
12.4.1 General . 24
12.4.2 CAN interface . 25
12.4.3 External test equipment cable . 27
Bibliography . 29

iv © ISO 2014 – All rights reserved

ISO/DIS 15765-4
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 15765-4 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3,
Electrical and electronic equipment.
This third edition cancels and replaces the second edition (ISO 15765-4:2013) of which has been technically
revised.
ISO 15765 consists of the following parts, under the general title Road vehicles — Diagnostic communication
over Controller Area Network (DoCAN):
 Part 1: General information and use case definition
 Part 2: Transport protocol and network layer services
1)
 Part 3: Implementation of unified diagnostic services (UDS on CAN)
 Part 4: Requirements for emissions-related systems

1) ISO 15765-3 has benn replaced by ISO 14229-3.
ISO/DIS 15765-4
Introduction
This part of ISO 15765 has been established in order to define common requirements for vehicle diagnostic
systems implemented on a Controller Area Network (CAN) communication link, as specified in ISO 11898.
Although primarily intended for diagnostic systems, it also meets requirements from other CAN-based
systems needing a network layer protocol.
To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model, in
accordance with ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven
layers as shown in Table 1.
Table 1 — Enhanced and legislated OBD diagnostic specifications applicable to the OSI layers
Vehicle manufacturer Legislated OBD Legislated WWH-OBD
Applicability OSI 7 layers
enhanced diagnostics (on-board diagnostics) (on-board diagnostics)
ISO 14229-1,
Application (layer 7) ISO 15031-5 ISO 27145-3, ISO 14229-1
ISO 14229-3
ISO 15031-2, ISO 15031-5,
ISO/PAS 27145-2, SAE 1930-DA,
ISO 15031-6,
Vehicle manufacturer SAE J1979-DA, SAE J2012-DA,
Presentation (layer 6) SAE J1930-DA,
specific SAE J1939 Appendix C (SPN),
SAE J1979-DA,
Seven layers SAE J1939-73 Appendix A (FMI)
SAE J2012-DA
according to
ISO/IEC 7498-1
Session (layer 5) ISO 14229-2 ISO 14229-2
and
Transport protocol
ISO/IEC 10731
ISO 15765-4,
(layer 4)
ISO 15765-2 ISO 15765-2,
ISO 15765-2
ISO 15765-4,
Network (layer 3)
ISO 27145-4
ISO 11898-2
Data link (layer 2) ISO 11898-1 ISO 15765-4,
ISO 11898-1,
Physical (layer 1) User defined
ISO 11898-2
The application layer services covered by ISO 14229-3 have been defined in compliance with diagnostic
services established in ISO 14229-1 and ISO 15031-5, but are not limited to use only with them.
The transport protocol and network layer services covered by this part of ISO 15765 have been defined to be
independent of the physical layer implemented, and a physical layer is only specified for legislated on-board
diagnostics (OBD).
For other application areas, ISO 15765 can be used with any CAN physical layer.

vi © ISO 2014 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/DIS 15765-4

Road vehicles — Diagnostic communication over Controller
Area Network (DoCAN) — Part 4: Requ
...


INTERNATIONAL ISO
STANDARD 15765-4
Third edition
2016-04-01
Road vehicles — Diagnostic
communication over Controller Area
Network (DoCAN) —
Part 4:
Requirements for emissions-related
systems
Véhicules routiers — Diagnostic sur gestionnaire de réseau de
communication (DoCAN) —
Partie 4: Exigences applicables aux systèmes associés aux émissions
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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 below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – 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 Symbols . 2
3.3 Abbreviated terms . 2
4 Conventions . 3
5 Document overview. 3
6 External test equipment initialization sequence. 4
6.1 General . 4
6.2 Baudrate validation procedure . 7
6.2.1 BaudrateRecord . 7
6.2.2 Baudrate validation . 7
6.2.3 External test equipment error detection provisions . 9
6.3 CAN identifier validation procedure . 9
6.3.1 CAN identifier validation procedure OBD . 9
6.3.2 CAN identifier validation procedure WWH-OBD .11
7 Application layer .13
8 Session layer .14
9 Transport protocol layer .14
10 Network layer .14
10.1 General .14
10.2 Network layer parameters .14
10.2.1 Timing parameter values .14
10.2.2 Definition of Flow Control parameter values .15
10.2.3 Maximum number of legislated OBD/WWH-OBD ECUs .16
10.3 Addressing formats .17
10.3.1 Normal and fixed addressing format .17
10.3.2 Functional addressing .17
10.3.3 Physical addressing .17
10.4 CAN identifier requirements .18
10.4.1 External test equipment .18
10.4.2 Legislated OBD/WWH-OBD server/ECU .18
10.5 Mapping of diagnostic addresses .19
10.5.1 Legislated OBD/WWH-OBD CAN identifiers .19
10.5.2 11 bit CAN identifiers .19
10.5.3 29 bit CAN identifiers .20
10.6 Support of ECUNAME reporting.21
11 Data link layer .21
12 Physical layer.21
12.1 General .21
12.2 External test equipment baudrates .21
12.3 External test equipment CAN bit timing .21
12.3.1 CAN bit timing parameter values .21
12.3.2 Nominal baudrate 250 kBit/s .22
12.3.3 Nominal baudrate 500 kBit/s .23
12.4 External test equipment .23
12.4.1 General.23
12.4.2 CAN interface .24
12.4.3 External test equipment cable .26
Bibliography .27
iv © ISO 2016 – 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 31, Data
communication.
This third edition cancels and replaces the second edition (ISO 15765-4:2011), which has been
technically revised. It also incorporates the Amendment ISO 15765-4:2011/Amd 1:2013.
ISO 15765 consists of the following parts, under the general title Road vehicles — Diagnostic
1)
communication over Controller Area Network (DoCAN) :
— Part 1: General information and use case definition
— Part 2: Transport protocol and network layer services
— Part 4: Requirements for emissions-related systems
1) ISO 15765-3 Implementation of unified diagnostic services (UDS on CAN) has been withdrawn and replaced
by ISO 14229-3 Road vehicles — Unified diagnostic services (UDS) — Part 3: Unified diagnostic services on CAN
implementation (UDSonCAN)
Introduction
This part of ISO 15765 has been established in order to define common requirements for vehicle
diagnostic systems implemented on a Controller Area Network (CAN) communication link, as specified
in ISO 11898. Although primarily intended for diagnostic systems, it also meets requirements from
other CAN-based systems needing a network layer protocol.
To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model, in
accordance with ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into
seven layers as shown in Table 1.
Table 1 — Enhanced and legislated OBD diagnostic specifications applicable to the OSI layers
Vehicle-
manufacturer- Legislated OBD Legislated WWH-OBD
a
OSI 7 layers
enhanced (on-board diagnostics) (on-board diagnostics)
diagnostics
Application ISO 14229-1,
ISO 15031-5 ISO 27145-3, ISO 14229-1
(layer 7) ISO 14229-3
ISO 15
...

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