International SA 33 SPN 520705 FMI 6: Load Shed OFF Relay Over Current

SA 33 SPN 520705 FMI 6 on International / Navistar trucks means: Load Shed OFF Relay Over Current. The failure mode (FMI 6) is “current above normal or grounded circuit”.

Code details

Manufacturer: International (Navistar)
Applies to: International / Navistar body controller (ESC) and multiplexed modules
Fault code: SA 33 SPN 520705 FMI 6
J1939 SPN: 520705
FMI: 6 — Current above normal or grounded circuit
Reporting module: Body Controller (source address 33)
Component / signal: Load Shed OFF Command
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

Cause and when it sets

Cause: Short To Ground in Load Shed OFF Circuit

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 6 tells the shop the type of failure to test for: current above normal or grounded circuit.
Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.