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ISO 27145-3 1st Edition, August 15, 2012 Road vehicles - Implementation of World-Wide Harmonized On-Board Diagnostics (WWH-OBD) communication requirements - Part 3: Common message dictionary
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO 27145 defines the implementation of a subset of
unified diagnostic services (UDS) specified in ISO 14229-1. The
diagnostic services are used to communicate the diagnostic data
defined in ISO 27145-2.
The subset of unified diagnostic services derives from the
requirements stated in the WWH-OBD GTR (Global technical regulation
No. 5; see Reference [17]). The common message set defined in this
part of ISO 27145 is independent of the underlying transport,
network, data link and physical layer. This part of ISO 27145 does
not specify any requirements for the in-vehicle network
architecture.
This part of ISO 27145 is compatible with ISO 14229-1 and
includes provisions to support the data set of SAE J1979-DA and SAE
J2012-DA WWH-OBD.
This part of ISO 27145 is intended for use with ISO 27145-4,
which is the entry point for the protocol initialization and is
based on two different data links:
— Diagnostic communication over Controller Area Network (DoCAN),
ISO 15765-1, ISO 15765-2, ISO 15765-4;
— Diagnostic communication over Internet Protocol (DoIP), ISO
13400 (all parts).
Due to the usage of standard network layer protocols, future
extensions to optional physical layers (e.g. wireless) are
possible.
Based on the results of the initialization, the external test
equipment determines which protocol and diagnostic services are
supported by the vehicle's emissions-related system, i.e.
— legislated OBD: ISO 15031 (all parts);
— legislated WWH-OBD: ISO 27145 (all parts).
This part of ISO 27145 includes capabilities required to satisfy
OBD regulations for multiple regions, vehicle types, model years,
and engine types. Those regulations are not yet final for some
regions and are expected to change in the future. This part of ISO
27145 does not attempt to interpret the regulations and does not
include applicability of the included diagnostic services and data
parameters for various vehicle applications. It is intended that
users of this part of ISO 27145 verify the applicability of each of
its clauses for a specific vehicle, engine, model year and
region.