FMI 9 — Abnormal update rate
Expected data is arriving too slowly or has stopped arriving over the data link.
What it typically points to
A module that has dropped offline, a network wiring issue, or a module that is overloaded or resetting.
Codes with FMI 9
- SPN 520 FMI 9Actual Retarder – Percent Torque
- SPN 639 FMI 9J1939 Network #1 (Primary Data Link)