BS ISO 27145-2:2012

Foreword
0 Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms
4 Conventions
5 Document overview
6 Common data dictionary requirements
7 Data identifier and routine identifier data
  record requirements
8 Diagnostic trouble code definition
9 Presentation layer requirements
Annex A (normative) - DID (PID, MID, ITID) and RID
        supported definition
Annex B (normative) - WWH-OBD server/ECU supported
        mandatory DID
Annex C (informative) - GTR WWH-OBD emissions system
        parameters
Annex D (normative) - GTR WWH-OBD DTCExtendedDataRecord
        content
Annex E (informative) - Definition guidelines for new
        DID (PID, MID, ITID) assignments
Bibliography

Specifies all regulatory data elements of the ISO 27145 series.

This part of ISO27145 defines all regulatory data elements of the ISO27145 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 ISO27145-3. The data elements are diagnostic trouble codes (DTCs), data identifiers (DIDs) and routine identifiers (RIDs). The mapping from parameter identifiers (PIDs), monitor identifiers (MIDs) and info type identifiers (ITIDs) is described in this part of ISO27145.

If new legislated WWH-OBD GTR modules are established, it is intended that ISO27145 be applicable with possible extensions, which can be included in this part of ISO27145, can be specified as enhancements of the SAE Digital Annexes or can even be part of other referenced documents which are intended to include the applicable data definitions.

ISO27145 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 world-wide communication standard, the communication concept as specified in ISO27145-4 is based on two different data links: ISO15765-4 and ISO13400 (all parts).

In view of the usage of standard network layer protocols, future extensions to optional physical layers (e.g. wireless) are possible.

NOTE It is expected to extend ISO27145-4 as necessary upon introduction of additional communication media.

ISO27145-4 is the entry point to establish communication with the vehicle. 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: ISO15031 series, and

• legislated WWH-OBD: ISO27145.

Vehicles according to ISO27145 provide VOBD system support as envisioned for WWH-OBD by Global Technical Regulation (GTR) No. 5.

IMPORTANT — Use cases deriving from country-specific implementation of GTR No. 5 into local legislation are not included in this part of ISO27145.