Rationale: Changes have been made to keep pace Californian Air Resources Board legislation: Title 13, CCR Section 1968.2. Malfunction and Diagnostic System Requirements--2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles and Engines and Section 1971.1. On-Board Diagnostic System Requirements--2010 and Subsequent Model-Year Heavy-Duty Engines. The majority of the changes are captured in the J1979DA document.
Included in: On-Board Diagnostics for Light and Medium Duty Vehicles Subscription Learn More
On-board diagnostics (OBD)Exhaust emissionsTest equipment and instrumentation
Also known as: SAE J 1979
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