International SA 33 SPN 2231 FMI 9: RPM #7 Data Link Comm. Failure

SA 33 SPN 2231 FMI 9 on International / Navistar trucks means: RPM #7 Data Link Comm. Failure. The failure mode (FMI 9) is “abnormal update rate”.

Code details

Manufacturer: International (Navistar)
Applies to: International / Navistar body controller (ESC) and multiplexed modules
Fault code: SA 33 SPN 2231 FMI 9
J1939 SPN: 2231
FMI: 9 — Abnormal update rate
Reporting module: Body Controller (source address 33)
Component / signal: Remote Power Module #7 Fuse
Truck models in source: 3200, 4100, 4300, 4400, 7300, 7400, 7500, 7600, 7700, 8500, 8600, BE 200, CE Bus, CXT, DuraStar, LoneStar, MXT, ProStar, RXT, TranStar, WorkStar
Logical signal: J1939BB_Rcv_65313_xxx_2 31_Timer

Cause and when it sets

Cause: Abnormal update rate

What to do next

Read active and inactive codes with the OEM service tool (Diamond Logic Builder can clear previously active codes) and note the occurrence count.
FMI 9 tells the shop the type of failure to test for: abnormal update rate.
Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.