Massey Ferguson 00110.00 – ECU: Coolant Temperature High

The Engine Control Unit (ECU) has detected that the engine coolant temperature has surpassed the maximum safe threshold (approximately 113-115°C or 235-240°F). This critical alert indicates the cooling system is failing to maintain normal operating temperatures, prompting the ECU to actively derate engine power to prevent severe internal engine damage.

• 4707
• 4708
• 4709
• 4710
• 5608
• 5609
• 5610
• 5611
• 5612
• 5613
• 5710SL
• 5711SL
• 5712SL
• 5713SL
• 7614
• 7615
• 7616
• 7618
• 7619
• 7620
• 7622
• 7624
• 7626
• 7714
• 7715
• 7715S
• 7716
• 7716S
• 7718
• 7718S
• 7719
• 7720
• 7720S
• 7722
• 7722S
• 7724
• 7724S
• 7726
• 7726S
• 1200 series
• 1500 series
• 1600 series
• GC series

1. 1

   Check coolant level in the radiator and reservoir, and inspect for contamination (e.g., oil, rust)

2. 2

   Check the radiator fins and front grilles for blockages from debris like dust, chaff, or grass

3. 3

   Inspect the cooling system (radiator, hoses, water pump, engine block) for visible coolant leaks

4. 4

   Inspect the fan blades for damage and ensure the fan belt is in good condition and properly tensioned

5. 5

   Test the radiator cap to ensure it holds the correct pressure

6. 6

   Inspect the coolant temperature sensor electrical connector and wiring harness for damage, corrosion, or loose connections

1. 1

   Clean radiator and grilles

   If blockages are found (mechanical cooling fault), clean debris from the radiator fins and grilles using compressed air or a soft brush to restore proper airflow.

2. 2

   Replace damaged hoses or belts

   If hoses are cracked, brittle, or collapsed, or if the fan belt is worn or damaged, replace them to restore cooling system integrity.

3. 3

   Test and replace thermostat

   If the engine overheats but the upper radiator hose remains cool, the thermostat is likely stuck closed. Replace the thermostat.

4. 4

   Inspect and replace water pump

   If there are leaks from the water pump's weep hole or excessive play in the pump's pulley (indicating a failing bearing), replace the water pump.

5. 5

   Test coolant temperature sensor

   If mechanical cooling components are functioning normally, remove the sensor (when engine is cold) and test its resistance with a multimeter in water of known temperatures (e.g., cold water then boiling water). Replace if there is no change in resistance or an open circuit.

6. 6

   Replace coolant temperature sensor

   Disconnect negative battery terminal. Drain coolant below sensor level. Remove old sensor, apply sealant to new sensor threads (if not pre-applied), and install by hand before tightening with a wrench. Reconnect wiring, refill coolant, bleed air from the system, and test.