What is SPN 3713 FMI 31 & How to Solve It?

What is SPN 3713 FMI 31:

SPN 3713 FMI 31 indicates a high voltage condition in the Fuel Injector Control Module (FICM). This fault code suggests that the ECM is receiving an unusually high voltage from the FICM, which can lead to improper fuel injection and engine inefficiency.

‍

Why This Happens:

• Faulty FICM.
  
• Shorted or damaged wiring in the FICM circuit.
  
• Loose or corroded connectors.
  
• High voltage supply affecting the FICM.
  
• ECM misinterpreting the signal from the FICM.
  
  

How to Fix It:

1. Inspect the FICM for visible damage or malfunction.
   
2. Test the FICM’s voltage and resistance to ensure it operates correctly.
   
3. Check the wiring and connectors for damage, corrosion, or loose connections.
   
4. Replace the faulty FICM if necessary.
   
5. Verify proper voltage supply to the FICM.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the FICM and wiring.
  
• Ensure proper voltage regulation to the FICM.
  
• Keep connectors clean and free from corrosion.
  
• Perform routine diagnostic checks on the fuel injector control system.
  
• Clue’s Fuel Management services help monitor the FICM and prevent fuel system issues before they affect engine performance.