ISO 17458-3:2013

INTERNATIONAL ISO
STANDARD 17458-3
First edition
2013-02-01
Road vehicles— FlexRay
communications system —
Part 3:
Data link layer conformance test
specification
Véhicules routiers — Système de communications FlexRay —
Partie 3: Spécification d'essai de conformité de la couche de liaison de
données
Reference number
©
ISO 2013
©  ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing 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 2013 – All rights reserved

Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Symbols . 1
3.3 Abbreviated terms . 2
3.4 Functions. 4
4 Conventions . 4
5 Document overview . 5
6 General . 6
6.1 Test architecture . 6
6.2 Test implementation . 7
6.3 Internal RxDelay . 9
6.4 Analog delays . 9
6.5 Accepted deviations . 10
6.6 Testability requirements . 11
6.7 Test execution . 14
7 Conformance test cases . 16
7.1 General statements and test case structure. 16
7.2 Receive data . 23
7.3 CHI . 125
7.4 Clock synchronisation . 440
7.5 Wakeup . 530
7.6 Startup . 568
7.7 Miscellaneous . 672
7.8 Optional TT-E feature . 820
7.9 Preambles . 846
8 Configuration . 854
8.1 Basic configuration . 854
8.2 Standard modifications . 859
9 Static test cases . 861
9.1 Electrical interface . 861
9.2 Protocol parameter . 861
Annex A (normative) Technical data for the electrical interface of a FlexRay Communication
Controller V3.0 . 862
Annex B (normative) Technical data for the protocol parameter of a FlexRay Communication
Controller V3.0 . 864
Bibliography . 865

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 17458-3 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3,
Electrical and electronic equipment.
ISO 17458 consists of the following parts, under the general title Road vehicles — FlexRay communications
system:
 Part 1: General information and use case definition
 Part 2: Data link layer specification
 Part 3: Data link layer conformance test specification
 Part 4: Electrical physical layer specification
 Part 5: Electrical physical layer conformance test specification
iv © ISO 2013 – All rights reserved

Introduction
The FlexRay communications system is an automotive focused high speed network and was developed with
several main objectives which were defined beyond the capabilities of established standardized bus systems
like CAN and some other proprietary bus systems. Some of the basic characteristics of the FlexRay protocol
are synchronous and asynchronous frame transfer, guaranteed frame latency and jitter during synchronous
transfer, prioritization of frames during asynchronous transfer, single or multi-master clock synchronization,
time synchronization across multiple networks, error detection and signalling, and scalable fault tolerance.
The FlexRay communications system is defined for advanced automotive control applications. It serves as a
communication infrastructure for future generation high-speed control applications in vehicles by providing:
 A message exchange service that provides deterministic cycle based message transport;
 Synchronization service that provides a common time base to all nodes;
 Start-up service that provides an autonomous start-up procedure;
 Error management service that provides error handling and error signalling;
 Wakeup service that addresses the power management needs.
Since start of development the automotive industry world wide supported the specification development. The
FlexRay communications system has been successfully implemented in production vehicles today.
The ISO 17458 series specifies the use cases, the communication protocol and physical layer requirements of
an in-vehicle communication network called "FlexRay communications system".
This part of ISO 17458 has been established in order to define the protocol conformance test case
requirements.
To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model specified in
ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. When
mapped on this model, the protocol and physical layer requirements specified by ISO 17458 are broken into:
 Diagnostic services (layer 7), specified in ISO 14229-1 [14], ISO 14229-4 [16];
 Presentation layer (layer 6), vehicle manufacturer specific;
 Session layer services (layer 5), specified in ISO°14229-2 [15];
 Transport layer services (layer 4), specified in ISO 10681-2 [5];
 Network layer services (layer 3), specified in ISO 10681-2 [5];
 Data link layer (layer 2), specified in ISO 17458-2, ISO 17458-3;
 Physical layer (layer 1), specified in ISO 17458-4, ISO 17458-5;
in accordance with Table 1.
Table 1 — FlexRay communications system specifications applicable to the OSI layers
ISO 17458 FlexRay Vehicle manufacturer
Applicability OSI 7 layers
communications system enhanced diagnostics
Application (layer 7) vehicle manufacturer specific ISO 14229-1, ISO 14229-4
Presentation (layer 6) vehicle manufacturer specific vehicle manufacturer specific
Seven layer
Session (layer 5) vehicle manufacturer specific ISO 14229-2
according to
ISO 7498-1
Transport (layer 4) vehicle manufacturer specific
and
ISO 10681-2
ISO/IEC
Network (layer 3) vehicle manufacturer specific
Data link (layer 2) ISO 17458-2, ISO 17458-3
Physical (layer 1) ISO 17458-4, ISO 17458-5

Table 1 shows ISO 17458 Parts 2 – 5 being the common standards for the OSI layers 1 and 2 for the FlexRay
communications system and the vehicle manufacturer enhanced diagnostics.
The FlexRay communications system column shows vehicle manufacturer specific definitions for OSI layers
3 – 7.
The vehicle manufacturer enhanced diagnostics column shows application layer services covered by
ISO 14229-4 which have been defined in compliance with diagnostic services established in ISO 14229-1, but
are not limited to use only with them. ISO 14229-4 is also compatible with most diagnostic services defined in
national standards or vehicle manufacturer's specifications. The presentation layer is defined vehicle
manufacturer specific. The session layer services are covered by ISO 14229-2. The transport protocol and
network layer services are specified in ISO 10681.

vi © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 17458-3:2013(E)

Road vehicles — FlexRay communications system — Part 3:
Data link layer conformance test specification
1 Scope
This part of ISO 17458 specifies the FlexRay protocol conformance test. This test verifies the conformance of
FlexRay communication controllers with respect to ISO 17458-2.
Some testability requirements are given in 6.2.2.3 and 6.6 and are applicable for FlexRay communication
controllers to pass the conformance test
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 17458-2, Road vehicles — FlexRay communications system — Part 2: Data link layer specification
ISO 17458-4, Road vehicles — FlexRay communications system — Part 4: Electrical physical layer
specification
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions defined in ISO 17458-2 and ISO 17458-4 apply.
3.2 Symbols
delta
∆
Element, lower-case epsilon
∈
ξ Xsi
µT microtick
σT gdSampleClockPeriod (= Sampletick)
modification of cycle length due to calculated rate correction (equal to zRateCorrection, used in
t
RC
figures of "Clock synchron
...

INTERNATIONAL ISO
STANDARD 17458-3
First edition
2013-02-01
Road vehicles— FlexRay
communications system —
Part 3:
Data link layer conformance test
specification
Véhicules routiers — Système de communications FlexRay —
Partie 3: Spécification d'essai de conformité de la couche de liaison de
données
Reference number
©
ISO 2013
©  ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing 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 2013 – All rights reserved

Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Symbols . 1
3.3 Abbreviated terms . 2
3.4 Functions. 4
4 Conventions . 4
5 Document overview . 5
6 General . 6
6.1 Test architecture . 6
6.2 Test implementation . 7
6.3 Internal RxDelay . 9
6.4 Analog delays . 9
6.5 Accepted deviations . 10
6.6 Testability requirements . 11
6.7 Test execution . 14
7 Conformance test cases . 16
7.1 General statements and test case structure. 16
7.2 Receive data . 23
7.3 CHI . 125
7.4 Clock synchronisation . 440
7.5 Wakeup . 530
7.6 Startup . 568
7.7 Miscellaneous . 672
7.8 Optional TT-E feature . 820
7.9 Preambles . 846
8 Configuration . 854
8.1 Basic configuration . 854
8.2 Standard modifications . 859
9 Static test cases . 861
9.1 Electrical interface . 861
9.2 Protocol parameter . 861
Annex A (normative) Technical data for the electrical interface of a FlexRay Communication
Controller V3.0 . 862
Annex B (normative) Technical data for the protocol parameter of a FlexRay Communication
Controller V3.0 . 864
Bibliography . 865

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 17458-3 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3,
Electrical and electronic equipment.
ISO 17458 consists of the following parts, under the general title Road vehicles — FlexRay communications
system:
 Part 1: General information and use case definition
 Part 2: Data link layer specification
 Part 3: Data link layer conformance test specification
 Part 4: Electrical physical layer specification
 Part 5: Electrical physical layer conformance test specification
iv © ISO 2013 – All rights reserved

Introduction
The FlexRay communications system is an automotive focused high speed network and was developed with
several main objectives which were defined beyond the capabilities of established standardized bus systems
like CAN and some other proprietary bus systems. Some of the basic characteristics of the FlexRay protocol
are synchronous and asynchronous frame transfer, guaranteed frame latency and jitter during synchronous
transfer, prioritization of frames during asynchronous transfer, single or multi-master clock synchronization,
time synchronization across multiple networks, error detection and signalling, and scalable fault tolerance.
The FlexRay communications system is defined for advanced automotive control applications. It serves as a
communication infrastructure for future generation high-speed control applications in vehicles by providing:
 A message exchange service that provides deterministic cycle based message transport;
 Synchronization service that provides a common time base to all nodes;
 Start-up service that provides an autonomous start-up procedure;
 Error management service that provides error handling and error signalling;
 Wakeup service that addresses the power management needs.
Since start of development the automotive industry world wide supported the specification development. The
FlexRay communications system has been successfully implemented in production vehicles today.
The ISO 17458 series specifies the use cases, the communication protocol and physical layer requirements of
an in-vehicle communication network called "FlexRay communications system".
This part of ISO 17458 has been established in order to define the protocol conformance test case
requirements.
To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model specified in
ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. When
mapped on this model, the protocol and physical layer requirements specified by ISO 17458 are broken into:
 Diagnostic services (layer 7), specified in ISO 14229-1 [14], ISO 14229-4 [16];
 Presentation layer (layer 6), vehicle manufacturer specific;
 Session layer services (layer 5), specified in ISO°14229-2 [15];
 Transport layer services (layer 4), specified in ISO 10681-2 [5];
 Network layer services (layer 3), specified in ISO 10681-2 [5];
 Data link layer (layer 2), specified in ISO 17458-2, ISO 17458-3;
 Physical layer (layer 1), specified in ISO 17458-4, ISO 17458-5;
in accordance with Table 1.
Table 1 — FlexRay communications system specifications applicable to the OSI layers
ISO 17458 FlexRay Vehicle manufacturer
Applicability OSI 7 layers
communications system enhanced diagnostics
Application (layer 7) vehicle manufacturer specific ISO 14229-1, ISO 14229-4
Presentation (layer 6) vehicle manufacturer specific vehicle manufacturer specific
Seven layer
Session (layer 5) vehicle manufacturer specific ISO 14229-2
according to
ISO 7498-1
Transport (layer 4) vehicle manufacturer specific
and
ISO 10681-2
ISO/IEC
Network (layer 3) vehicle manufacturer specific
Data link (layer 2) ISO 17458-2, ISO 17458-3
Physical (layer 1) ISO 17458-4, ISO 17458-5

Table 1 shows ISO 17458 Parts 2 – 5 being the common standards for the OSI layers 1 and 2 for the FlexRay
communications system and the vehicle manufacturer enhanced diagnostics.
The FlexRay communications system column shows vehicle manufacturer specific definitions for OSI layers
3 – 7.
The vehicle manufacturer enhanced diagnostics column shows application layer services covered by
ISO 14229-4 which have been defined in compliance with diagnostic services established in ISO 14229-1, but
are not limited to use only with them. ISO 14229-4 is also compatible with most diagnostic services defined in
national standards or vehicle manufacturer's specifications. The presentation layer is defined vehicle
manufacturer specific. The session layer services are covered by ISO 14229-2. The transport protocol and
network layer services are specified in ISO 10681.

vi © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 17458-3:2013(E)

Road vehicles — FlexRay communications system — Part 3:
Data link layer conformance test specification
1 Scope
This part of ISO 17458 specifies the FlexRay protocol conformance test. This test verifies the conformance of
FlexRay communication controllers with respect to ISO 17458-2.
Some testability requirements are given in 6.2.2.3 and 6.6 and are applicable for FlexRay communication
controllers to pass the conformance test
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 17458-2, Road vehicles — FlexRay communications system — Part 2: Data link layer specification
ISO 17458-4, Road vehicles — FlexRay communications system — Part 4: Electrical physical layer
specification
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions defined in ISO 17458-2 and ISO 17458-4 apply.
3.2 Symbols
delta
∆
Element, lower-case epsilon
∈
ξ Xsi
µT microtick
σT gdSampleClockPeriod (= Sampletick)
modification of cycle length due to calculated rate correction (equal to zRateCorrection, used in
t
RC
figures of "Clock synchron
...

INTERNATIONAL ISO
STANDARD 17458-3
First edition
2013-02-01
Road vehicles — FlexRay
communications system —
Part 3:
Data link layer conformance test
specification
Véhicules routiers — Système de communications FlexRay —
Partie 3: Spécification d'essai de conformité de la couche de liaison de
données
Reference number
©
ISO 2013
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Published in Switzerland
ii © ISO 2013 – All rights reserved

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