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Road vehicles - Implementation of World-Wide Harmonized On-Board Diagnostics (WWH-OBD) communication requirements - Part 2: Common data dictionary
ISO 27145-2:2012 defines all regulatory data elements of the ISO 27145 series. The data elements are used to provide the external test equipment with the diagnostic status of the vehicle on-board diagnostics (*VOBD*) system in the vehicle. All data elements are communicated with the unified diagnostic services as defined in ISO 27145-3. The data elements are:
The mapping from parameter identifiers (PIDs), monitor identifiers (MIDs), and info type identifiers (ITIDs) is described in ISO 27145-2:2012.
If new legislated *WWH-OBD GTR* modules are established, it is intended that ISO 27145 be applicable with possible extensions. These extensions can be included in ISO 27145-2:2012, specified as enhancements of the SAE Digital Annexes, or even be part of other referenced documents which are intended to include the applicable data definitions.
ISO 27145 is intended to become the single communication standard for access to OBD-related information (*VOBD*). To allow for a smooth migration from the existing communication standards to this future worldwide communication standard, the communication concept as specified in ISO 27145-4 is based on two different data links: ISO 15765-4 and ISO 13400 (all parts).
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