Broadcasts currently occurring faults.
: Recent revisions added specific FMIs like FMI 20 (Data Drifted High) and FMI 21 (Data Drifted Low). Resources for Implementation sae j193973 pdf exclusive
Identifies the specific component or system that failed (e.g., Oil Pressure). Failure Mode Identifier (FMI): Broadcasts currently occurring faults
Without adherence to J1939-73, a diagnostic tool cannot "speak" to an ECU, nor can an ECU report faults in a way that fleet managers understand. sae j193973 pdf exclusive
SAE J1939-73 is a specific subset of the J1939 standards family. It focuses exclusively on the . While other parts of J1939 handle how data moves physically, J1939-73 defines the "language" used to identify problems. Core Functions