Vehicle OBD II Compliance Test Cases
The main purpose of this Recommended Practice is to verify that vehicles are capable of communicating a minimum
subset of information, in accordance with the diagnostic test services specified in SAE J1979: E/E Diagnostic Test Modes,
or the equivalent document ISO 15031-5: Communication Between Vehicle and External Equipment for Emissions-
Related Diagnostics – Part 5: Emissions-related diagnostic services.
Any software meeting these specifications will utilize the vehicle interface that is defined in SAE J2534, Recommended
Practice for Pass-Thru Vehicle Programming.
Rationale: Corrections have been made to this document in order to keep pace with and agree with changes made to the California
Air Resources Board legislation: Title 13, California Code Regulations, Section 1968.2, Malfunction and Diagnostic
System Requirements for 2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks, and Medium-Duty
Vehicles and Engines (OBD II), particularly with regards to permanent DTCs and new diesel engine requirements. Many
functional enhancements have also been included in this document.
Design Engineering and StylingDiagnosticsTest procedures
Also known as: SAE J 1699/3
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