27145.pdf

Transmitted by the expert from ISO

Informal document No. GRPE-52-12

(52nd GRPE, 6-9 June 2006,

agenda item 1.3.)

CONTRIBUTION to the WWH-OBD gtr

With regard to the implementation of WWH-OBD communication requirements, draft

document ISO/PDPAS 27145-1.4. (part 1 to part 4) have been made available to GRPE

secretariat and to GRPE experts for being referenced in the WWH-OBD gtr.

As these parts are voluminous, they will not be distributed as a paper version during the

52nd GRPE session. However, all four parts are electronically attached to this informal

document and can be consulted or downloaded from the GRPE website at the address:

http://www.unece.org/trans/main/wp29/wp29wgs/wp29grpe/grpeinf52.html

- - - - -

ISO TC 22/SC 3 N

Date: 2006-04-27

ISO/PDPAS 27145-1.4

ISO TC 22/SC 3/WG 1

Secretariat: DIN

Road vehicles — Implementation of WWH-OBD communication

requirements — Part 1: General information and use case definition

Élément introductif — Élément central — Partie 1: Titre de la partie

Warning

This document is not an ISO International Standard. It is distributed for review and comment. It is subject to

change without notice and may not be referred to as an International Standard.

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.

Document type: Publicly Available Specification

Document subtype:

Document stage: (20) Preparatory

Document language: E

C:\WWH-obd\GENEVA 2006_06\prepa meeting\ISO_PAS_27145-1.4_(E)_WWH-OBD_GIUC_RevOn_2006-

04-27.doc STD Version 2.1c2

ISO/PDPAS 27145-1.4

This ISO document is a working draft or committee draft and is copyright-protected by ISO. While the

reproduction of working drafts or committee drafts in any form for use by participants in the ISO standards

development process is permitted without prior permission from ISO, neither this document nor any extract

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Violators may be prosecuted.

ISO/PDPAS 27145-1.4

Contents

Page

Scope ......................................................................................................................................................1

Normative references............................................................................................................................1

Terms and definitions ...........................................................................................................................2

Symbols and abbreviated terms ..........................................................................................................3

Conventions ...........................................................................................................................................3

Document overview...............................................................................................................................4

Use case description.............................................................................................................................5

7.1

Overview.................................................................................................................................................5

7.2

Emissions-related use cases ...............................................................................................................5

7.2.1

Use case summary ................................................................................................................................5

7.2.2

Use case 1 – Information about the emissions-related OBD system state .....................................5

7.2.3

Use case 2 – Information about active and confirmed emission-related malfunctions.................6

7.2.4

Use case 3 – Information related to diagnosis for the purpose of repair........................................6

Vehicle On-Board Diagnostic (VOBD) .................................................................................................7

8.1

VOBD definition .....................................................................................................................................7

8.2

VOBD system .........................................................................................................................................7

8.3

VOBD data set........................................................................................................................................9

8.4

VOBD access method .........................................................................................................................10

8.4.1

Overview...............................................................................................................................................10

8.4.2

VOBD data caching mode...................................................................................................................10

8.4.3

VOBD direct data mode ......................................................................................................................13

iii

ISO/PDPAS 27145-1.4

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.

In other circumstances, particularly when there is an urgent market requirement for such documents, a

technical committee may decide to publish other types of normative document:

—

an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in

an ISO working group and is accepted for publication if it is approved by more than 50 % of the members

of the parent committee casting a vote;

—

an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical

committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting

a vote.

An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a

further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is

confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an

International Standard or be withdrawn.

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/PAS 27145-1 was prepared by Technical Committee ISO/TC 22, Road vehicles , Subcommittee SC 3,

Electrical and electronic equipment .

ISO/PAS 27145 consists of the following parts, under the general title Road vehicles — Implementation of

WWH-OBD communication requirements :

Part 1: General information and use case definition

Part 2: Common emissions-related data dictionary

Part 3: Common message dictionary

Part 4: Connection between vehicle and test equipment

Part 5: External test equipment

NOTE

Part 4 of the standard will be extended as necessary due to introduction of additional communication media.

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