What is SPN 1636 FMI 10:
SPN 1636 FMI 10 indicates a problem with the Engine Coolant Temperature Sensor. FMI 10 refers to a high voltage condition, where the ECM is receiving a signal from the sensor that is too high, which can lead to overheating or poor engine performance if left unresolved.
Why This Happens:
- Faulty coolant temperature sensor.
- Shorted or damaged wiring in the sensor circuit.
- High voltage supply affecting sensor output.
- Loose or corroded sensor connectors.
- ECM failure to process the sensor signal.
How to Fix It:
- Inspect the coolant temperature sensor for damage or wear.
- Test the sensor’s voltage and resistance to ensure it is functioning within expected parameters.
- Check the wiring and connectors for damage or corrosion.
- Replace the faulty sensor if it is out of specification.
- Ensure proper coolant levels and inspect the cooling system for leaks.
How to Avoid It Before It Happens:
- Perform regular coolant system maintenance and sensor inspections.
- Keep connectors clean and free from corrosion.
- Ensure that the coolant system is functioning properly and free of leaks.
- Perform routine diagnostic checks to monitor sensor performance.
- Clue’s Equipment Maintenance services proactively monitor coolant temperature sensors to detect issues before they impact engine performance.
