SAE J2178-1-2011 PDF

Scope: This SAE Recommended Practice defines the information contained in the header and data fields of non-diagnostic messages for automotive serial communications based on SAE J1850 Class B networks. This document describes and specifies the header fields, data fields, field sizes, scaling, representations, and data positions used within messages. The general structure of a SAE J1850 message frame without in-frame response is shown in Figure 1. The structure of a SAE J1850 message with in-frame response is shown in Figure 2. Figures 1 and 2 also show the scope of frame fields defined by this document for non-diagnostic messages. Refer to SAE J1979 for specifications of emissions related diagnostic message header and data fields. Refer to SAE J2190 for the definition of other diagnostic data fields. The description of the network interface hardware, basic protocol definition, the electrical specifications, and the CRC byte are given in SAE J1850.

SAE J2178-1-2011 Referenced Document

SAE J1213/1-1997 Glossary of Vehicle Networks for Multiplexing and Data Communications
SAE J1850-2006 Class B Data Communication Network Interface
SAE J1930-2008 Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations and Acronyms Equivalent to ISO/TR 15031-2
SAE J1979-2010 E/E Diagnostic Test Modes
SAE J2190-1993 Enhanced E/E Diagnostic Test Modes

2011 SAE J2178-1-2011 Class B Data Communication Network Messages Detailed Header Formats and Physical Address Assignments
2004 SAE J2178-1-2004 Class B Data Communication Network Messages Detailed Header Formats and Physical Address Assignments
1999 SAE J2178-1-1999 Class B Data Communication Network Messages Detailed Header Formats and Physical Address Assignments