: Lists Previously Active DTCs , providing a history of faults that have occurred but are no longer active.
: Used to Clear/Reset previously active DTC information. sae j193973 pdf exclusive
The document is the definitive standard for the diagnostic application layer in heavy-duty vehicles, such as trucks, buses, and agricultural machinery. It defines the specific messages, known as Diagnostic Messages (DMs) , and the Diagnostic Trouble Codes (DTCs) used to report and troubleshoot issues across a vehicle's Electronic Control Units (ECUs) . Current Version and Access : Lists Previously Active DTCs , providing a
: Providers like CSS Electronics offer legal licenses for the J1939-73 standard PDF as part of their J1939-73 DBC file packages, which convert the standard's technical rules into a machine-readable format for data loggers. Core Components of J1939-73 It defines the specific messages, known as Diagnostic
: A 4-byte field containing: