On Board Diagnostics Implementation Guide
SAE J1939-03 provides requirements and guidelines for the implementation of On Board Diagnostics (OBD) on
heavy-duty vehicles (HDV) using the SAE J1939 family of standards. The guidelines identify where the necessary
information to meet OBD regulations may be found among the SAE J1939 document set. Key requirements are identified
here to insure the interoperability of OBD scan tools across individual OBD compliant vehicles.
Market-defined regulations permit the use of SAE J1939 to meet OBD requirements. Implementers are cautioned to
obtain and review the specific regulations for the markets where their products are sold. This document is focused on
guidelines and requirements to satisfy the State of California Air Resources Board (ARB), the authors of 13 CCR 1971.1,
United States Environmental Protection Agency, Euro IV and V requirements from European Commission directives, and
UN/ECE WP 29 GRPE WWH OBD Global Technical Regulation (GTR).