VALVE GP-CONTROL 1U2743 - Caterpillar

Table 1
Event Code    
Description    Conditions which Activate the Code    System Response    
E017(1) High Engine Coolant Temperature Warning     The engine coolant temperature has exceeded the trip point and the delay time has expired.     The alarm output is activated. The code is logged.    
E016(3) High Engine Coolant Temperature Shutdown     The shutdown output is activated. The code is logged. The engine is shut down. Probable Causes
Low coolant level and/or coolant leakage
Aeration of the coolant
Problem with the water pump
High ambient temperature and/or high inlet air temperature
Insufficient flow of air or coolant through the radiator or through the heat exchanger
Faulty water temperature regulators
Faulty coolant temperature sensor and/or circuit
Insufficient flow of coolant through the engine
Exhaust restriction
Excessive load
Incorrect air/fuel ratio
Combustion gas in the coolantRecommended Actions
Check for a Low Coolant Level and/or Coolant Leakage
Note: Low coolant level can be the effect of overheating rather than the cause.Check the coolant level.Run the engine to operating temperature. Inspect the cooling system for leaks.Determine whether the leak occurs before the engine overheats.Add coolant, if necessary. If leaking is found, make the necessary repairs.Check for Aeration of the Coolant
Air can enter the cooling system if the pressure cap is not operating properly. Check the operation of the pressure cap. Replace the pressure cap, if necessary.Install a ball check valve at the outlet of the water pump. Start the engine. Open the ball check valve in order to check for aeration of the coolant. If air bubbles are found in the coolant, determine the source of the air.If the coolant has been changed recently, make sure that the air has been purged from the cooling system. Make sure that the cooling system is properly vented.The supply pressure to the water pump must be sufficient in order to prevent cavitation. Measure the supply pressure at the inlet to the water pump.Water Pump
The engine will overheat if the water pump is not operating properly. Measure the coolant pressure at the outlet of the water pump. Make sure that the water pump is in good condition.Check for High Ambient Temperature and/or High Inlet Air Temperature
Determine if the ambient air temperature is within the design specifications for the cooling system.Make sure that the engine's exhaust does not heat the radiator or the heat exchanger.Check for high inlet air temperature. Refer to Troubleshooting, "Inlet Air Temperature Is High".Determine the cause of the high air temperature. Make corrections, when possible.Check for Insufficient Flow of Air and Coolant through the Radiator or Heat Exchanger
Measure the coolant temperature at the inlet for the coolant.Radiator
Check the fins of the radiator for obstructions. Check the fan for proper operation.If the radiator fins are obstructed, clean the fins. If the fan does not operate properly, make the necessary repairs.Heat Exchanger
Check for sufficient flow and temperature of the cooling water through the heat exchanger. If the flow of cooling water through the heat exchanger is insufficient, determine the location of the obstruction.Check the Water Temperature Regulators
Check the water temperature regulators for proper operation. Refer to