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Road vehicles — Diagnostic

communication over Controller Area

Network (DoCAN) —

Part 2:

Transport protocol and network layer

services

Véhicules routiers — Communication de diagnostic sur gestionnaire de

réseau de communication (DoCAN ) —

Partie 2: Protocole de transport et services de la couche réseau

ISO 2011

Reference number

ISO 15765-2:2011(E)

Second edition

2011-11-15

ISO

15765-2

INTERNATIONAL

STANDARD

BF50AAB3CE6D701DFF85C1DFFB63DB2FE0E4AED9FFFAE5D3399025FEE5C45EA159C01562

Daimler AG;019 - HPC D652 - GR/PQS;

Uncontrolled copy when printed (: Tobias Baumann, 2012-11-26)

ISO 15765-2:2011(E)

Contents Page

Foreword

............................................................................................................................................................................ iv

Introduction

........................................................................................................................................................................ v

1 Scope

...................................................................................................................................................................... 1

2 Normative references

......................................................................................................................................... 1

3 Terms, denitions and abbreviated terms

.................................................................................................... 1

3.1 Terms and denitions ......................................................................................................................................... 1

3.2 Abbreviated terms ............................................................................................................................................... 1

4 Conventions

.......................................................................................................................................................... 3

5 Document overview

............................................................................................................................................ 3

6 Network layer overview

..................................................................................................................................... 5

6.1 General ................................................................................................................................................................... 5

6.2 Services provided by network layer to higher layers ................................................................................ 5

6.3 Internal operation of network layer ................................................................................................................ 5

7 Network layer services

....................................................................................................................................... 7

7.1 General ................................................................................................................................................................... 7

7.2 Specication of network layer service primitives ...................................................................................... 7

7.3 Service data unit specication ...................................................................................................................... 10

8 Transport layer protocol

..................................................................................................................................13

8.1 Protocol functions ............................................................................................................................................. 13

8.2 SingleFrame transmission ..............................................................................................................................13

8.3 Multiple-frame transmission ........................................................................................................................... 13

8.4 Transport layer protocol data units .............................................................................................................. 17

8.5 Protocol control information specication ................................................................................................ 18

8.6 Maximum number of FC.WAIT frame transmissions (N_WFTmax) ..................................................... 24

8.7 Network layer timing ......................................................................................................................................... 24

8.8 Interleaving of messages ................................................................................................................................29

9 Data link layer usage

........................................................................................................................................30

9.1 Data link layer service parameters ............................................................................................................... 30

9.2 Data link layer interface services ..................................................................................................................30

9.3 Mapping of the N_PDU elds ......................................................................................................................... 30

9.4 CAN frame data length code (DLC) .............................................................................................................. 33

Annex A (normative) Use of normal xed and mixed addressing with data link layer according to SAE

J1939

..................................................................................................................................................................... 35

Annex B (normative) Reserved CAN Ids

.................................................................................................................... 38

Bibliography

..................................................................................................................................................................... 39

BF50AAB3CE6D701DFF85C1DFFB63DB2FE0E4AED9FFFAE5D3399025FEE5C45EA159C01562

Daimler AG;019 - HPC D652 - GR/PQS;

Uncontrolled copy when printed (: Tobias Baumann, 2012-11-26)

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 15765-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical

and electronic equipment.

This second edition cancels and replaces the rst edition (ISO 15765-2:2004), 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 denition

— Part 2: Transport protocol and network layer services

— Part 3: Implementation of unied diagnostic services (UDS on CAN)

— Part 4: Requirements for emissions-related systems

ISO 15765-2:2011(E)

BF50AAB3CE6D701DFF85C1DFFB63DB2FE0E4AED9FFFAE5D3399025FEE5C45EA159C01562

Daimler AG;019 - HPC D652 - GR/PQS;

Uncontrolled copy when printed (: Tobias Baumann, 2012-11-26)

Introduction

This part of ISO 15765 has been established in order to dene common requirements for vehicle diagnostic

systems implemented on a controller area network (CAN) communication link, as specied 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 on-board diagnostics specications

applicable to the OSI layers

Applicability OSI 7 layers

Vehicle-

manufacturer-

enhanced

diagnostics

Legislated OBD

(on-board diagnostics)

Legislated WWH-OBD

(on-board diagnostics)

Seven layers

according to

ISO/IEC 7498-1

and

ISO/IEC 10731

Application (layer 7)

ISO 14229 -1,

ISO 14229-3

ISO 15031-5 ISO 27145-3, ISO 14229-1

Presentation (layer 6)

Vehicle manufacturer

specic

ISO 15031-2,

ISO 15031-5,

ISO 15031-6,

SAE J1930-DA,

SAE J1979-DA,

SAE J2012-DA

ISO 27145-2, SAE 1930-DA,

SAE J1979-DA, SAE J2012-DA,

SAE J19 39:2011,

Appendix C (SPN),

SAE J1939-73:2010,

Appendix A (FMI)

Session (layer 5) ISO 14229-2

Transport protocol

(layer 4)

ISO 15765-2ISO 15765-2

ISO

15765-4

ISO 15765-4,

ISO 15765-2

ISO

27145-4

Network (layer 3)

Data link (layer 2) ISO 11898-1

ISO 11898-2

ISO 11898-3

ISO 11898-5

user dened

ISO 11898-1,

ISO 11898-2

ISO 15765-4,

ISO 11898-1,

ISO 11898-2

Physical (layer 1)

The application layer services covered by ISO 14229-3 have been dened in compliance with diagnostic

services established in ISO 14229-1 and ISO 15031-5, but are not limited to use only with them. ISO 14229-3

is also compatible with most diagnostic services dened in national standards or vehicle manufacturer’s

specications.

The transport protocol and network layer services covered by this part of ISO 15765 have been dened to be

independent of the physical layer implemented, and a physical layer is only specied for legislated OBD.

For other application areas, ISO 15765 can be used with any CAN physical layer.

ISO 15765-2:2011(E)

BF50AAB3CE6D701DFF85C1DFFB63DB2FE0E4AED9FFFAE5D3399025FEE5C45EA159C01562

Daimler AG;019 - HPC D652 - GR/PQS;

Uncontrolled copy when printed (: Tobias Baumann, 2012-11-26)

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