International SA 33 SPN 3314 FMI 2: Fifth Wheel Jaw Unlock Switch state is invalid

SA 33 SPN 3314 FMI 2 on International / Navistar trucks means: Fifth Wheel Jaw Unlock Switch state is invalid. The failure mode (FMI 2) is “data erratic, intermittent or incorrect”.

Code details

Manufacturer: International (Navistar)
Applies to: International / Navistar body controller (ESC) and multiplexed modules
Fault code: SA 33 SPN 3314 FMI 2
J1939 SPN: 3314
FMI: 2 — Data erratic, intermittent or incorrect
Reporting module: Body Controller (source address 33)
Component / signal: Fifth Wheel Release Control
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: Fifth_Wheel_Jaw_Unlock_S witch

Cause and when it sets

Cause: Data erratic, intermittent or incorrect

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 2 tells the shop the type of failure to test for: data erratic, intermittent or incorrect.
Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.