GEAR 6P2234 - Caterpillar

Use this procedure in order to troubleshoot high coolant temperature or use this procedure if one of the following event codes is active. Access the engine monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes. Refer to Troubleshooting, "Engine Monitoring Parameters" for information about engine events.
Table 1
Engine Event
J1939 Code and Description Conditions that Generate the Code System Response
110-0 Engine Coolant Temperature : High - most severe (3) The engine coolant temperature has exceeded the trip point and the delay time has expired. The code is logged.
110-15 Engine Coolant Temperature : High - least severe (1)
110-16 Engine Coolant Temperature : High - moderate severity (2) Probable Causes
Low Coolant Level and/or Coolant Leakage
CoolantCoolant Temperature Sensor
Coolant temperature sensor and/or the circuitRadiator Pressure Cap and Water Temperature Regulator
Radiator pressure cap
Water temperature regulatorRadiator or Heat Exchanger
Radiator
Heat exchanger (if equipped)Engine Cooling Fan
Faulty engine cooling fanCoolant Pump
Inspection of the coolant pumpCylinder Head, Cylinder Liner, or Engine Block
Internal coolant leakageRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.Coolant
Inspect the coolant level. If necessary, add coolant.
Check for the correct mixture of antifreeze and water. Refer to Operation and Maintenance Manual.
Check the cooling system for leaks. If leaks are found, perform the necessary repairs.
Check for air in the cooling system. Refer to Systems Operation/Testing and Adjusting, "Cooling System" for the correct procedure. Coolant Temperature Sensor and/or the Circuit
Check the reading of the coolant temperature on Cat ET. The temperature should rise steadily as the engine is warmed. Ensure that the temperature is reasonable.If the reading on Cat ET for the coolant temperature is not reasonable, troubleshoot the circuit and the coolant temperature sensor. Refer to Troubleshooting, "Sensor Signal (Analog, Passive) - Test".Radiator Pressure Cap and Water Temperature Regulator
Perform a pressure test on the