ISO/FDIS 15765-2

Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 2: Transport protocol and network layer services

ISO 15765-2:2016 specifies a transport protocol and network layer services tailored to meet the requirements of CAN‑based vehicle network systems on controller area networks as specified in ISO 11898‑1. It has been defined in accordance with the diagnostic services established in ISO 14229‑1 and ISO 15031‑5 but is not limited to use with them and is also compatible with most other communication needs for in‑vehicle networks. ISO 11898‑1 specifies variable length CAN frames with a maximum payload size dependent on the protocol device used. A CLASSICAL CAN protocol device can transmit/receive frames with payload sizes ranging from 0 bytes to 8 bytes per frame. A CAN FD (flexible data rate) protocol device can transmit/receive frames with payload sizes from 0 bytes to 64 bytes. A CAN FD protocol device is also capable of transmitting/receiving CLASSICAL CAN frames. The diagnostic communication over controller area network (DoCAN) protocol supports the standardized service primitive interface as specified in ISO 14229‑2 (UDS). ISO 15765-2:2016 provides the transport protocol and network layer services to support different application-layer implementations such as - enhanced vehicle diagnostics (emissions-related system diagnostics beyond legislated functionality, non-emissions-related system diagnostics), - emissions-related on-board diagnostics (OBD) as specified in ISO 15031, - world-wide harmonized on-board diagnostics (WWH-OBD) as specified in ISO 27145, and - end of life activation on on-board pyrotechnic devices (ISO 26021). The transport protocol specifies an unconfirmed communication. NOTE This part of ISO 15765 does not determine whether CLASSICAL CAN, CAN FD or both are recommended or required to be implemented by other standards referencing this part of ISO 15765.

Véhicules routiers — Communication de diagnostic sur gestionnaire de réseau de communication (DoCAN) — Partie 2: Protocole de transport et services de la couche réseau

General Information

• Status: Not Published
• ICS: 43.040.15 - Car informatics. On board computer systems
• ICS: 43.180 - Diagnostic, maintenance and test equipment
• Technical Committee: ISO/TC 22/SC 31 - Data communication
• Drafting Committee: ISO/TC 22/SC 31 - Data communication
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 18-Dec-2023
• Completion Date: 18-Dec-2023

Relations

• Revises: ISO 15765-2:2016 - Road vehicles — Diagnostic communication over Controller Area Network (DoCAN) — Part 2: Transport protocol and network layer services
• Effective Date: 06-Jun-2022

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 15765-2
ISO/TC 22/SC 31
Road vehicles — Diagnostic
Secretariat: DIN
communication over Controller Area
Voting begins on:
2023-12-18 Network (DoCAN) —
Voting terminates on:
Part 2:
2024-02-12
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
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 15765-2:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 15765-2:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 15765-2
ISO/TC 22/SC 31
Road vehicles — Diagnostic
Secretariat: DIN
communication over Controller Area
Voting begins on:
Network (DoCAN) —
Voting terminates on:
Part 2:
Transport protocol and network layer
services
Véhicules routiers — Communication de diagnostic sur gest ionnaire
de réseau de communication (DoCAN) —
Partie 2: Protocole de transport et services de la couche réseau
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 15765-2:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 15765-2:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.2
4.1 Symbols . 2
4.2 Abbreviated terms . 3
5 Conventions . 4
6 I SO 11898-1 CAN data link layer extension . 5
6.1 Classical CAN and
...

DRAFT INTERNATIONAL STANDARD
ISO/preFDISFDIS 15765-2:2023(E)
ISO/TC 22/SC 31
Date: 2023-10-02
Secretariat: DIN
Date: 2023-12-04
Road vehicles — Diagnostic communication over Controller Area
Network (DoCAN) — —
Part 2:
Transport protocol and network layer services
Véhicules routiers — Communication de diagnostic sur gestionnairegest ionnaire de réseau de
communication (DoCAN) — —
Partie 2: Protocole de transport et services de la couche réseau
FDIS stage

---------------------- Page: 1 ----------------------
ISO/FDIS 15765-2:2023(E)
© ISO 20222023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel.Phone: + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ii © ISO 2023 – All rights reserved
 © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 15765-2:2023(E)
Contents Page
Foreword . vi
Introduction . viii
Part 2: Transport protocol and network layer services . 1
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 2
4.1 Symbols . 2
4.2 Abbreviated terms . 3
5 Conventions . 5
6 ISO 11898-1 CAN data link layer extension . 5
6.1 Classical CAN and CAN FD frame feature comparison . 5
6.2 Mapping of transport and network layer attributes to CAN data frames . 6
7 T_Data abstract service primitive interface definition . 7
7.1 T_Data services . 7
7.2 T_Data interface . 8
7.3 Data type definitions . 8
8 Transport and network layer services . 9
8.1 General . 9
8.2 Transport and network layer abstract service primitives . 10
8.2.1 Data.req .
...