International SA 33 SPN 158 FMI 2: Key State Ignition Signal Error

Code details

Manufacturer

International (Navistar)

Applies to

International / Navistar body controller (ESC) and multiplexed modules

Fault code

SA 33 SPN 158 FMI 2

J1939 SPN

158

FMI

2 — Data erratic, intermittent or incorrect

Reporting module

Body Controller (source address 33)

Component / signal

Battery Potential (Voltage), Switched

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

1600-A16

Cause and when it sets

Cause: Open in Ignition Signal Input Circuit To BC

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.

Related fault codes

• International Fault Code SPN 158 FMI 15 — ECM Switched Voltage Too High
• International Fault Code SPN 158 FMI 17 — ECM Switched Voltage Too Low
• International Fault Code SPN 158 FMI 16 — Key Switch Battery Potential: Data Valid But Above Normal Operating Range – Moderately Severe Level
• International Fault Code SPN 158 FMI 18 — Key Switch Battery Potential: Data Valid But Below Normal Operating Range – Moderately Severe Level
• International Fault Code SPN 158 FMI 3 — Key Switch Battery Potential: Voltage Above Normal, Or Shorted To High Source
• International Fault Code SPN 158 FMI 4 — Key Switch Battery Potential: Voltage Below Normal, Or Shorted To Low Source