Checking Thermostat

Checking the thermostat

Checking the thermostat




- Start the engine. Run the engine until the engine coolant temperature (ECT) reaches approximately 100°C
- When the engine coolant temperature (ECT) is 100°C, activate the engine cooling fan (FC) with the engine running
- Wait for 90 seconds
- Switch off the engine cooling fan (FC).
Read off the engine coolant temperature (ECT). If it is 85°C or lower when the fan stops, the thermostat is defective.





Was a fault detected?

Yes - Replacing the component

No - No Fault Found

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Replacing the component
Replace the thermostat according to Engine coolant temperature (ECT) sensor, replacing Service and Repair.


Continue - Fault Found

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