SPACER 1800026 - Caterpillar

Table 1
Diagnostic Trouble Codes for High Coolant Temperature    
CDL Code    Code Description    Comments    
E361-1     High Engine Coolant Temperature : least severe     The coolant temperature has been at
109° C (228° F) for 10 seconds.
The ECM has been powered for at least 2 seconds.
The engine has been running for at least 185 seconds.
There are no electrical faults or battery faults on the circuit.    
E361-2     High Engine Coolant Temperature : moderate severity     The coolant temperature has been at
111° C (232° F) for 10 seconds.
The ECM has been powered for at least 2 seconds.
The engine has been running for at least 185 seconds.
There are no electrical faults or battery faults on the circuit.
The engine will be derated.    
E361-3     High Engine Coolant Temperature : most severe     The coolant temperature has been at
114° C (237° F) for 10 seconds.
The ECM has been powered for at least 2 seconds.
The engine has been running for at least 185 seconds.
There are no electrical faults or battery faults on the circuit.
The engine will be derated.
The engine may shut down.    Probable Causes
Diagnostic codes
Coolant temperature gauge
Coolant level
Radiator fins
Radiator cap and/or pressure relief valve
Restriction in the coolant system
Water temperature regulator
Engine cooling fan
Quality of coolant
Coolant pump
Cylinder head gasketRecommended Actions
Diagnostic Codes
Use one of the following methods to check for diagnostic codes that relate to the temperature in the cooling system:
The electronic service tool
The display on the control panelElectronic Service Tool
Connect the electronic service tool to the diagnostic connector.
Check for active diagnostic codes on the electronic service tool.
Investigate any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".Display on the Control PanelNote: The following procedure is only applicable if the application is equipped with a display on the control panel.
Check the display on the control panel for active diagnostic codes.
Troubleshoot any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".Coolant Temperature Gauge
Compare the reading for the coolant temperature on the electronic service tool to the reading for the coolant temperature on a calibrated test gauge.Coolant Level
Inspect the coolant level. If necessary, add coolant.
Check the cooling system for leaks. Repair any leaks.Radiator Fins
Check the radiator fins for dirt, debris, and/or damage. Remove any dirt and/or debris and straighten any bent fins.Radiator Cap and/or Pressure Relief Valve
Pressure-test the cooling system. Refer to Systems Operation, Testing, and Adjusting, "Cooling System" for the correct procedure.
Check that the seating surfaces of the pressure relief valve and the radiator cap are clean and undamaged.
Check operation of the pressure relief valve and/or the radiator cap. If necessary, clean the components and/or replace the components.Restriction in the Coolant System
Visually inspect the cooling system for collapsed hoses and/or other restrictions.
Clean the radiator and flush the radiator. Refer to Systems Operation, Testing, and Adjusting, "Cooling System".Water Temperature Regulator
Check the water temperature regulator for correct operation. Refer to Systems Operation, Testing, and Adjusting, "Cooling System" for the proper procedure. If necessary, replace the water temperature regulator. Refer to Disassembly and