Class B Data Communication Network Messages - Part 2: Data Parameter Definitions
- Ground Vehicle Standard
- J2178/2_201104
- Stabilized
Scope
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SAE J2178-1, Part 1 of SAE J2178 (Titled: Detailed Header Formats and Physical Address Assignments) describes the two allowed forms of message header formats, Single Byte and Consolidated. It also contains the physical node address range assignments for the typical sub-systems of an automobile.
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SAE J2178-2, Part 2 of SAE J2178 (this part, Titled: Data Parameter Definitions) defines the standard parametric data which may be exchanged on SAE J1850 (Class B) networks. The parameter scaling, ranges, and transfer functions are specified. Messages which refer to these parametric definitions shall always adhere to these parametric definitions. It is intended that at least one of the definitions for each parameter in this part match the SAE J1979 definition.
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SAE J2178-3, Part 3 of SAE J2178 (Titled: Frame IDs for Single Byte Forms of Headers) defines the message assignments for the Single Byte header format and the one byte form of the Consolidated header format.
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SAE J2178-4, Part 4 of SAE J2178 (Titled: Message Definition for Three Byte Headers) defines the message assignments for the three byte form of the Consolidated header format.
Rationale
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| TABLE 1 | PRN GROUPINGS | |
| TABLE 2 | PRN RANGES | |
| TABLE 3 | MASK BIT ASSIGNMENT | |
| Unnamed Dataset 4 | ||
| TABLE 4 | SAE J1979 COMPATIBLE PRN ASSIGNMENTS (PRNS 0000 - 00FF) | |
| TABLE 5 | ENGINE PRN ASSIGNMENTS (PRNS 1000 - 17FF) | |
| TABLE 6 | TRANSMISSION PRN ASSIGNMENTS (PRNS 1800 - 1FFF) | |
| TABLE 7 | BRAKES/TIRES/WHEELS PRN ASSIGNMENTS (PRNS 2800 - 2FFF) | |
| TABLE 8 | STEERING PRN ASSIGNMENTS (PRNS 3000 - 37FF) | |
| TABLE 9 | SUSPENSION PRN ASSIGNMENTS (PRNS 3800 - 3FFF) | |
| TABLE 11 | DRIVER INFORMATION PRN ASSIGNMENTS (PRNS 6000 - 67FF) | |
| TABLE 15 | HVAC PRN ASSIGNMENTS (PRNS 9800 - 9FFF) | |
| TABLE 16 | CONVENIENCE PRN ASSIGNMENTS (PRNS A000 - A7FF) | |
| TABLE 18 | ELECTRIC VEHICLE ENERGY TRANSFER SYSTEM PRN ASSIGNMENTS (PRNS C800 - CFFF) | |
| TABLE 19 | CONFIGURATION CODES PRN ASSIGNMENTS (PRNS E000 - E7FF) | |
| TABLE 21 | MISCELLANEOUS PRN ASSIGNMENTS (PRNS F800 - FFFF) | |
| Unnamed Dataset 17 | ||
| Unnamed Dataset 18 | ||
| Unnamed Dataset 19 | ||
| TABLE 22 | ZEROs SLOT ASSIGNMENTS | |
| TABLE 23 | UNM-xx, Short (<8 Bit) SLOTs | |
| TABLE 24 | UNM-08, 8 Bit SLOTs | |
| TABLE 25 | UNM-16, 16 Bit SLOTs | |
| TABLE 26 | UNM-24, 24 Bit SLOTS | |
| TABLE 27 | UNM-32, 32 Bit SLOTs | |
| TABLE 28 | SNM-08, 8 Bit SLOTs | |
| Unnamed Dataset 27 | ||
| Unnamed Dataset 28 | ||
| Unnamed Dataset 29 | ||
| TABLE 29 | ASCII CONVERSION CHART BITS 4 to 6 FIRST HEX DIGIT (MSB) | |
| Unnamed Dataset 31 | ||
| TABLE 30 | MANUFACTURER USAGE CHART | |
| Unnamed Dataset 33 |
Issuing Committee
Vehicle Architecture For Data Communications Standards
The ever-increasing consumer expectations of vehicle internal functions and connectivity to the environment are outstripping the capability of current data communication architecture design. To address this vulnerability, this committee will investigate and endorse new vehicle architectures that meet system requirements such as: Reliability, System design metrics, Data security, Fault Tolerance, Built in testability, Validation/Verification , Compatibility, and Redundancy. This committee's mission is the investigation and development of vehicle architecture and data communication protocols and methods required to achieve the growth expected in the area of vehicle electronics. The committee shall continue to contribute to the understanding and use of semiconductor devices such as microprocessors, power devices, and other integrated circuits and the data transmission media used in these systems. Thus, all vehicle architectures (excluding aircraft) and devices used in these systems shall be included. Specific objectives shall include: Address the effect of electrical power environments (e.g., 42V, ground offsets) , Sponsor forums to evaluate new technologies (e.g., MOST, Bluetooth, Firewire), Publish technical reports on vehicle architecture and system partitioning, interfacing, modes of operation, protocol standards, recommended conformance test methods, and evaluation methods of those standards , Maintain the existing documents relevant to this committee (e.g., glossary of automotive electronics terms, SAE J1213/1), Encourage the applicable industries, government and educational institutions to support the efforts of this committee.
Reference
| Number | Title |
|---|---|
| ANSI/IEEESTD754 | This document is not part of the subscrption. |
| J1213-1 | This document is not part of the subscrption. |
| J1850_201510 | Class B Data Communications Network Interface |
| J1930_201703 | Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, and Acronyms - Equivalent to ISO/TR 15031-2 |
| J1979_201202 | E/E Diagnostic Test Modes |
| J1979_201408 | E/E Diagnostic Test Modes |
| J2190 | This document is not part of the subscrption. |