RENR5042-02 85 Troubleshooting Section Determine the cause of the high temperature condition. Make corrections in order to prevent the high temperature from recurring. b. Check the quality of the coolant. Follow the recommendations in the Operation and Maintenance Manual. Results: c. Check the radiator for blockage. Check the inlet temperature of the coolant for the radiator. Compare the reading to the regulated temperature. If the temperature is OK, check the outlet temperature of the coolant. A high temperature differential indicates an insufficient flow rate. OK STOP. i02286870 E539 High Intake Manifold Air Temperature d. Check for air in the cooling system.
Air can enter the cooling system in different ways. The most common causes of air in the cooling system are the incorrect filling of the cooling system and combustion gas leakage into the cooling system. Combustion gas can get into the system through inside cracks, a damaged cylinder head, or a damaged cylinder head gasket. SMCS Code: 1050-038-TA Conditions Which Generate This Code: The Electronic Control Module (ECM) detects a problem with the engine’s intake manifold air temperature. Information on default settings and ranges for this event can be found in Troubleshooting, “Event Codes”. e. Check the cooling system hoses and clamps. Damaged hoses with leaks can normally be seen.
Hoses that have no visual leaks can soften during operation. The soft areas of the hose can become kinked or crushed during operation. These areas of the hose can restrict the coolant flow. Hoses become soft and/or get cracks after a period of time. The inside of a hose can deteriorate, and the loose particles of the hose can restrict the coolant flow. System Response: The event code will be logged. Possible Performance Effect: E539-1 (Warning) None f. If a sea water strainer is used in the application, verify that the sea water strainer is not plugged. E539-2 (Derate) The engine power will be derated. g. Check the heat exchanger for a restriction to the flow of water. Troubleshooting: h.
Check the water pump. A water pump with a damaged impeller does not pump enough coolant. Remove the water pump and check for damage to the impeller. Intake manifold air temperature can be high for the following reasons: Engine’s cooling system i. Check the water temperature regulator. A water temperature regulator that does not open, or a water temperature regulator that only opens part of the way can cause overheating. High ambient air temperature High inlet air restriction and/or high altitude Restriction in the exhaust system j. If the cooling system for this application is equipped with an expansion tank, check the shunt line for the expansion tank.
The shunt line must be submerged in the expansion tank. A restriction of the shunt line from the expansion tank to the inlet of the jacket water pump will cause a reduction in water pump efficiency. A reduction in water pump efficiency will result in low coolant flow. Faulty inlet air temperature sensor and/or circuit Perform the following Inspections A. Check the Engine’s Cooling System. a. Verify that the cooling system is filled to the proper level. If the coolant level is too low, air will get into the cooling system. Air in the cooling system will cause a reduction in coolant flow.