International SA 33 SPN 597 FMI 0: Brake Switch reading above normal range

Code details

Manufacturer

International (Navistar)

Applies to

International / Navistar body controller (ESC) and multiplexed modules

Fault code

SA 33 SPN 597 FMI 0

J1939 SPN

597

FMI

0 — Data valid but above normal operating range (most severe)

Reporting module

Body Controller (source address 33)

Component / signal

Brake Switch

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

Connector pins

1602-E14 & E15

Logical signal

Brake_Analog_Switch_Raw_ Signal

Cause and when it sets

Cause: Brake Switch Shorted High or Open Circuit or faulty sensor system

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 0 tells the shop the type of failure to test for: data valid but above normal operating range (most severe).
• Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.

Related fault codes

• International SA 33 SPN 597 FMI 1 — Brake Switch reading below normal range
• International SA 33 SPN 597 FMI 2 — Brake Switch Inputs Do Not Match
• International SA 33 SPN 597 FMI 7 — Brake Switch Stuck Open Or Closed
• International SA 33 SPN 597 FMI 14 — Brake switch is stuck in the open or closed position
• International SA 33 SPN 597 FMI 14 — Brake switch inputs do not match
• International Fault Code SPN 597 FMI 19 — Brake Switch Not Detected on J1939
• International Fault Code SPN 597 FMI 2 — Brake Switch or Circuit Fault
• International Fault Code SPN 597 FMI 19 — Brake Switch: Received Network Data In Error