CORE ASSEM. 7S2385 - Caterpillar

Use this procedure in order to troubleshoot low coolant level or use this procedure if one of the following codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes. Refer to Troubleshooting, "Diagnostic Trouble Codes" for information about diagnostic codes. Access the monitoring system on Caterpillar 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".Note: Some of the following codes may not be applicable for certain applications.Clear all "Active" codes using Cat ET before proceeding with the following procedure. Refer to Troubleshooting, "Diagnostic Capabilities - Clearing Active Codes for On Board Diagnostics (OBD)" for more information on clearing "Active" codes.
Table 1
Diagnostic Trouble Codes    
CDL Code    J1939 Code    Code Description
(code descriptions may vary)    System Response    
E2143-1     111-17     Low Engine Coolant Level     The engine has been running for 60 seconds. The engine coolant level has fallen below the coolant level sensor for the specified delay time.
The code is logged.    
E2143-2     111-18     Low Engine Coolant Level     The engine has been running for 60 seconds. The engine coolant level has fallen below the coolant level sensor for the specified delay time.
Engine power is derated. The code is logged.    
E2143-3     111-1     Low Engine Coolant Level     The engine has been running for 60 seconds. The engine coolant level has fallen below the coolant level sensor for the specified delay time.
Engine power is derated. The code is logged.    Probable Causes
Low Coolant Level and/or Coolant Leakage
Coolant level sensorRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Low Coolant Level and/or Coolant Leakage
A. Inspect the coolant level.
   
Coolant level
   
Result: The engine coolant level is OK.
Proceed to Test Step 2.
Result: The engine coolant level is not OK.
Troubleshoot the cause of the incorrect coolant level.
Clear "Active" codes using Cat ET.
1.Check for the correct mixture of antifreeze and water. Refer to Operation and Maintenance Manual.
2. Check the cooling system for leaks. Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test" for the correct procedure. Repair any leaks immediately.
3. Check for leakage at the ARD nozzle heater o-rings. White exhaust smoke would be an indication of leakage past the ARD nozzle heater o-rings.
In order to check for leakage at the ARD nozzle heater o-rings, pressurize the cooling system and then remove the ARD head. Inspect the combustion can for signs of coolant. If the o-rings are leaking coolant, replace the ARD head.
4. Check the NRS cooler for leaks. Refer to Testing and Adjusting, "Exhaust Cooler (NRS) - Test".
5. Check for air in the cooling system. Refer to Systems Operation/Testing and Adjusting, "Testing the Cooling System" for the correct procedure.
   
2. Faulty Sensor
A. If an electrical problem with the coolant level sensor is suspected, refer to Troubleshooting, "Coolant Level - Test" for information that is related