标准编号：ISO/PAS 27145-2:2006
中文名称：道路车辆.实施全球统一重型发动机认证规程（WWH-OBD）要求.第2部分：与普通排放相关的数据词典
英文名称：Road vehicles — Implementation of WWH-OBD communication requirements — Part 2: Common emissions-related data dictionary
发布日期：2006-09
标准范围
ISO/PAS 27145 is intended to become the single communication standard for access to OBD-relatedinformation. To allow for a smooth migration from the existing communication standards to this futureworldwide standardized communication standard, the initial communication concept will be based on CAN. Ina second step, ISO/PAS 27145 will be extended to define the world-wide harmonized OBD communicationstandard based on existing industry communications standards (e.g. Internet Protocol) over Ethernet. Due tothe usage of standard network layer protocols, future extensions to optional physical layers (e.g. wireless) arepossible.This part of ISO/PAS 27145 defines all regulatory emissions-related data elements of ISO/PAS 27145. A newpart may be added in the future upon availability of new legislated WWH-OBD GTR modules. The dataelements are used to provide the external test equipment with the diagnostic status of the emissions-relatedsystem in the vehicle. All data elements are communicated with the unified diagnostic services as defined inISO/PAS 27145-3. Data elements are Diagnostic Trouble Codes (DTCs), Parameter Identifiers (PIDs),Monitor Identifiers (MIDs), Test Identifiers (TIDs)/Routine Identifiers (RIDs) and InfoType Identifiers (ITIDs).This part of ISO/PAS 27145 defines three (3) different sets of data elements:a) A legacy (backward compatible) data set as defined in SAE J1939-71/-73 and ISO 15031-5/ISO 15031-6;b) A unified data set (new data definition according to ISO/PAS 27145-2); andc) A manufacturer data set (defined by manufacturer).Each set of data elements uses its own scaling and encoding scheme. Legacy data elements are scaled andencoded according the definitions in SAE J1939-71/-73 and ISO 15031-5/ISO 15031-6. Unified data elementsare scaled and encoded according to the definitions in ISO/PAS 27145-2. Manufacturer data elements arerecommended to be scaled and encoded according to the definitions of the unified data set. This will ease thetransfer of manufacturer defined data elements into the standardized (unified) data range.
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