Use this procedure in order to troubleshoot low coolant level or use this procedure if one of the following event codes is active. Refer to Troubleshooting, “Event Code List” for information about event codes and the default trip points for these codes. You must access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes.
| Event or Diagnostic Code | ||
| Code and Description | Conditions which Generate this Code | System Response |
| E058(3) Low Engine Coolant Level Shutdown | The engine coolant level has fallen below the coolant level sensor for the specified delay time. | The code is logged. The engine will be shutdown after 10 seconds. |
| E059(1) LowEngine Coolant Level Warning | The engine coolant level has fallen below the coolant level sensor for the specified delay time. | The code is logged. |
| 111-1 Low Coolant Level Warning | The engine coolant level has fallen below the coolant level sensor for the specified delay time. | The code is logged. The diagnostic lamp will flash. The alarm lamp will illuminate. |
| 111-11 Very Low Coolant Level (Derate) | The engine coolant level has fallen below the coolant level sensor for the specified delay time. | The code is logged. The diagnostic lamp will flash. The alarm lamp will flash. The engine will be derated 10 seconds after the “Warning”. |
| 111-11 Very Low Coolant Level (Shutdown) | The engine coolant level has fallen below the coolant level sensor for the specified delay time. | The code is logged. The engine will be shutdown after 30 seconds. |
Probable Causes
- Low coolant level and/or coolant leakage
- Coolant level sensor
Recommended Actions
Low Coolant Level and/or Coolant Leakage
- 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. Repair any leaks immediately.
- Check for air in the cooling system. Refer to Systems Operation/Testing and Adjusting for the correct procedure.
Coolant Level Sensor
If an electrical problem with the coolant level sensor is suspected, refer to Troubleshooting, “Coolant Level – Test” for information that is related to troubleshooting an electrical problem with the coolant level sensor.
