COVER ASSEM. 7L6431 - Caterpillar

Table 1
J1939 Code and Description CDL Code and Description System Response
111-1
Low Engine Coolant Level E2143-3
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.
111-17
Low Engine Coolant Level E2143-1
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.
The code is logged.
111-18
Low Engine Coolant Level E2143-2
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
Coolant system leak
NOx Reduction System (NRS) Cooler leak
Air in cooling system
Combustion gases in cooling system
ARD nozzle heater leak
Incorrect antifreeze mixture
Coolant level sensorRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Low Coolant Level.
A. Inspect the coolant level.
Coolant Level
Result: The engine coolant level is OK.
Proceed to Test Step 7.
Result : The engine coolant level is NOT OK.
Repair : Fill the coolant tank to the proper level if necessary.
Proceed to Test Step 2.
2. Check the Cooling System for Leaks.
Cooling system
Result : The cooling system is OK.
Proceed to Test Step 3.
Result: The cooling system is NOT OK.
Repair: Refer to Systems Operation/Testing and Adjusting, "Cooling System - Test" for the correct procedure. Repair any leaks immediately.
If the problem is not resolved, proceed to Test Step 3.
3. Check the NRS Cooler for Leaks.
NRS Cooler
Result : The NRS cooler is OK.
Proceed to Test Step 4.
Result : The NRS cooler is NOT OK.
Repair : Refer to Testing and Adjusting, "Exhaust Cooler (NRS) - Test".
If the problem is not resolved, proceed to Test Step 4.
4. Check for Air or Combustion Gas in the Cooling System.
Cooling system
Result : The cooling system is OK.
Proceed to Test Step 5.
Result : There is air in the cooling system.
Repair : Refer to Systems Operation/Testing and Adjusting, "Testing the Cooling System" for the correct procedure.
Result : There are combustion gases in the cooling system.
Repair : Inspect the cylinder head gasket for leakage and contact the Dealer Solution Network (DSN) for further assistance.
If the problem is not resolved, proceed to Test Step 5.
5. Check for Leakage at the ARD Nozzle Heater O-rings.
Note : White exhaust smoke would be an indication of leakage past the ARD nozzle heater o-rings.
ARD Nozzle Heater O-rings
Result : The ARD nozzle heater o-rings are OK.
Proceed to Test Step 5.
Result : The ARD nozzle heater o-ring seals are NOT OK.
Repair : 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.
If the problem is not resolved, proceed to Test Step 6.
6. Check for the Correct Mixture of Antifreeze and Water.
Antifreeze Mixture
Result : The antifreeze and water mixture is OK.
Proceed to Test Step 7.
Result : The antifreeze and water