What is fault code SPN?
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What is fault code SPN?
The suspect parameter number (SPN) is diagnostic fault code terminology found on some of our equipment using a J1939 CAN data link. Represents the SPN with error. Every defined SPN can be used in a DTC. The FMI is used along with the SPN to provide specific information that relates to a diagnostic trouble code (DTC).
How do you clear a code 3714 on a Cummins?
Cummins Engine Derated with Codes 3712 & 3714
- Run the Aftertreatment Maintenance command.
- Run the NOx Reset command.
- Perform a regen (Recommended, not required)
- Codes will go inactive and can be cleared.
What does SPN mean in diesel?
Suspect Parameter Number (SPN) Represents the SPN with error. Every defined SPN can be used in a DTC. Failure Mode Identifier (FMI) Represents the nature and type of error that occurred, e.g., value range violation (high or low), sensor short-circuits, incorrect update rate, calibration error.
What causes engine derate?
As the ambient temperature increases beyond designed operating conditions, engine derating begins, decreasing its efficiency. For example, if an engine is designed to operate at 30°C, and the ambient temperature reaches 40°C, the engines can experience a reduction in power by as much as 5-10%.
What is SCR inducement?
SCR Inducements or “Inducements” means the limitations imposed on vehicle operation that occur when a vehicle runs out of DEF, has poor quality DEF, or when tampering occurs to the SCR system. Inducements might include limitations on vehicle speed or rendering inoperable the restart function of the vehicle.
How often should you change crankcase filter on ISX Cummins?
The coalescer filter should be checked and replaced in accordance with Cummins Filtration’s recommendation of every year or every 1500 hours, whichever occurs first.
What are SPN and FMI codes?
The FMI may also indicate that an abnormal operating condition has been detected. The codes are displayed in the form “SPN – FMI”. The ECM / ECU also attaches a text description to the message that is transmitted over the J1939 data link. This text description is used to describe the SPN – FMI….Failure Mode Identifier (FMI) Codes on J1939 data link.
| FMI | Description |
|---|---|
| 31 | – |
What does FMI code mean?
Failure Mode Identifier
Failure Mode Identifier (FMI) Codes on J1939 data link. The FMI is used along with the SPN to provide specific information that relates to a diagnostic trouble code (DTC). The FMI may indicate that a problem with an electronic circuit or an electronic component has been detected.
What happens when a truck goes into derate?
A derate means that the program inside the engine computer limits either the power or vehicle speed. A derate is designed to protect you from causing engine or DPF damage. A derate can be caused by various sensors or systems.
Can a SCR be cleaned?
Plant SCR Cleaning Using a combination of environmentally friendly washing and thermal kiln cycling, we are able to regenerate your unit saving potentially thousands of pounds. The process removes soot, ash and AdBlue® build up, reducing NOx emissions to keep the machine both fuel efficient and legal.
