ISO 11992-2:2014

DRAFT INTERNATIONAL STANDARD ISO/DIS 11992-2
ISO/TC 22/SC 3 Secretariat: DIN
Voting begins on Voting terminates on

2011-12-12 2012-15-12
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  •  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  •  ORGANISATION INTERNATIONALE DE NORMALISATION

Road vehicles — Interchange of digital information on electrical
connections between towing and towed vehicles —
Part 2:
Application layer for brakes and running gear
Véhicules routiers -- Échange d'informations numériques sur les connexions électriques entre véhicules
tracteurs et véhicules tractés —
Partie 2: Couche d'application pour les équipements de freinage et les organes de roulement
[Revision of second edition (ISO 11992-2:2003) and ISO 11992-2:2003/Amd.1:2007]
ICS 43.040.15
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Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est
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©  International Organization for Standardization, 2011

ISO/DIS 11992-2
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ii © ISO 2011 – All rights reserved

ISO/DIS 11992-2
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 3
5 General Specifications . 4
6 Application layer . 5
6.1 Protocol Data Unit (PDU) specification . 5
6.2 Parameter Group Number (PGN) . 7
6.3 Address assignment . 7
6.4 Message routing . 9
6.5 Parameters . 11
6.6 Messages . 63
7 Conformance tests . 82
7.1 General . 82
7.2 Conformance tests for commercial vehicles . 82
7.3 Conformance tests for towed vehicles . 83
Annex A (normative) Geometric data . 84
Annex B (informative) Message Flow . 88
Bibliography . 94

ISO/DIS 11992-2
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 11992-2 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 11992-2:2003) and its amendment 1 of which
have been technically revised.
ISO 11992 consists of the following parts, under the general title Road vehicles — Interchange of digital
information on electrical connections between towing and towed vehicles:
⎯ Part 1: Physical layer and data-link layer
⎯ Part 2: Application layer for brakes and running gear
⎯ Part 3: Application layer for equipment other than brakes and running gear
⎯ Part 4: Diagnostics
iv © ISO 2011 – All rights reserved

ISO/DIS 11992-2
Introduction
This part of the internation standard has been established in order to define the data interchange between a
commercial vehicle and its towed vehicle(s), including communication between towed vehicles, using a
Controller Area Network (CAN) serial data link as specified in ISO 11992-1 for control and status data related
to electronical controlled braking and running gear applications.
It is subject to additions which will become necessary in order to keep pace with experience and technical
advances. Care has been taken to ensure that these additions can be introduced in a compatible way, and
care will have to be taken in the future so that such additions remain compatible with previous versions. In
particular, it may become necessary to standardize new parameters and parameter groups. ISO members can
request that such new parameters and parameter groups to be included in future editions of ISO 11992.

DRAFT INTERNATIONAL STANDARD ISO/DIS 11992-2

Road vehicles — Interchange of digital information on electrical
connections between towing and towed vehicles —
Part 2:
Application layer for brakes and running gear
1 Scope
This part of the ISO 11992 international standard specifies the parameters and messages for electronically
controlled braking systems, including ABS (anti-lock braking systems) and VDC (vehicle dynamics control
systems) as well as for running gear equipment (i.e. systems for steering, suspension and tyres), to ensure
the data communication interchange of information between road vehicles with a maximum authorized total
mass greater than 3500 kg, and their towed vehicles, including the communication between (several) towed
vehicles, on a dedicated network. It does not include any other communication on that network that is not
related to communication between those vehicles.
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 7638, Road vehicles — Connectors for the electrical connection of towing and towed vehicles —
Connectors for braking systems and running gear of vehicles
ISO 11898-1, Road vehicles — Controller area network (CAN) — Part 1: Data link layer and physical
signalling
ISO 11992-1, Road vehicles — Interchange of digital information on electrical connections between towing
and towed vehicles — Part 1: Physical layer and data-link layer
ISO 11992-4, Road vehicles — Interchange of digital information on electrical connections between towing
and towed vehicles — Part 4: Diagnostics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11992-1, ISO 11898-1 and the
following apply.
3.1
ABS
This definition is used for a control function to support anti-lock braking (anti-lock braking system). It is also
used for control systems providing an anti-lock braking function.
3.2
ASR
This definition is used for a control function to support traction control (anti-spin regulation).
ISO/DIS 11992-2
3.3
Centre-axle trailer
This term is used for a towed vehicle equipped with a towing device which can not move vertically (in relation
to the trailer), and in which the axle(s) is(are) positioned close to the center of gravity of the trailer.
3.4
Commercial vehicle
This term is used for a vehicle that is engine driven and capable of towing other vehicles; same as a truck or
tractor.
3.5
EBS
This definition is used for a control system providing an electronically controlled braking that contains
functions like ABS, ASR, VDC.
3.6
ECU
This term is used for an electronic control unit.
3.7
Drawbar trailer
This term is used for a towed vehicle with one axle group or single axle at the front that is steered by
connection to the towing vehicle by a drawbar and one axle group or single axle at the rear. This vehicle may
also be a towing type.
3.8
Dolly
This term is used for a towed vehicle with one axle group or single axle, and a fifth wheel coupling, designed
to convert a semi trailer into the equivalent of a full trailer.
3.9
Gateway
This term is used for a network node that is able to filter and forward messages to different network segments.
3.10
Link trailer
This term is used for a towed vehicle with a fifth wheel coupling, designed for towing a semi trailer.
3.11
Network segment
This term is used for an electrical connection between one group of logically combined nodes of a
communication network.
3.12
Node
This term is used for an electronic device providing means to receive and transmit messages.
3.13
RGE
This definition is used for running gear equipment of a vehicle, including steering, suspension and tyres.
3.14
ROP
This definition is used for a control function to prevent roll-over situations of a vehicle (roll-over prevention /
protection), part of a VDC function.
NOTE In UNECE Regulation No. 13 Roll-over Prevention is referred to as Roll-over Control.
2 © ISO 2011 – All rights reserved

ISO/DIS 11992-2
3.15
Semi-trailer
This term is used for a towed vehicle with one axle group or single axle at the rear and a means of attachment
to a tractor that results in some of the load being imposed on the tractor.
3.16
Towed vehicle
This term is used for any type of vehicle that is actually being towed by another vehicle; usually these are
trailers or dollies.
3.17
Towing vehicle
This term is used for any type of vehicle that is actually towing another vehicle; usually these are commercial
vehicles (tractors) or a trailer or dolly towing another trailer
3.18
VDC
This definition is used for a control function as part of the braking system that reacts to stabilise the vehicle
during dynamic manoeuvres (Vehicle Dynamic Control) with the possible sub-functions ROP, YC.
3.19
YC
This definition is used for a control function to reduce unwanted lateral movement of a vehicle (yaw control),
part of a VDC function
NOTE In UNECE Regulation No. 13 Yaw Contr
...