Use this procedure in order to troubleshoot low engine coolant pressure or use this procedure if the following event code is active. Refer to Troubleshooting, "Event Codes" for information about event codes. Access the engine monitoring system on AVSpare Electronic Technician (ET) in order to view the current trip points for these codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".
| Event Code | ||
|---|---|---|
| Description | Conditions which Generate this Code | System Response |
| E2112(1) Low Engine Coolant Pressure | The engine coolant pressure is below the trip point pressure for the programmed delay time. | The code is logged. |
- Low coolant level
- Damaged coolant lines
- Radiator blockage
- Blockage of the oil cooler heat exchanger
- Coolant pressure sensor
- Jacket water coolant pump
Inspect the coolant level. If necessary, add coolant.
Damaged Cooling Systems Piping
Perform a visual inspection of the cooling systems piping that is on the engine and on the machine. Look for piping that is damaged, crushed, or bent.
Check the condition of any rubber boots that are used in the circuit. Replace any of the boots that show signs of cracking or collapse.
Check the radiator for internal blockage. Check the temperature difference between the inlet and the outlet of the radiator. Clean the radiator or perform the necessary repairs.
Blockage of the Oil Cooler Heat Exchanger
Internal blockage may be the cause of the low cooling system pressure. Inspect the inlet side of oil cooler heat exchanger for debris and blockage. Clean the oil cooler or perform the necessary repairs.
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Steam or hot coolant can cause severe burns. Do not loosen the filler cap or the pressure cap on a hot engine. Allow the engine to cool before removing the filler cap or the pressure cap. |
While the engine is off and the cooling system is cool, remove any pressure from the system by carefully removing the pressure cap. While there is no pressure in the cooling system, use Cat ET to check the status of the coolant pressure. Compare the status to the status of the "Atmospheric Pressure" parameter. For sensors that are working correctly, the pressures will be comparable.
Install a pressure gauge near the pressure sensor at the outlet of the coolant pump. Start the engine. Use Cat ET to check the status of the coolant pressure while the engine is at low engine idle. Compare the gauge reading with the reading from Cat ET. Also, compare the readings during engine operation.
If the readings from the comparative gauge do not agree approximately with Cat ET, troubleshoot the circuit for the pressure sensor. Refer to Troubleshooting, "Sensor Signal (Analog, Active) - Test" for details.
Perform the necessary repairs.
Inspect the impeller vanes of the water pump for damage and/or for erosion. Repair impeller vanes. Replace parts, if necessary. Refer to the engines Disassembly and Assembly manual for details.