GEAR-PLNTY-YM 2199658 - Caterpillar

Table 1
Diagnostic Trouble Codes    
J1939 Code    Code Description
(code descriptions may vary)    Comments    
3031-7     Aftertreatment #1 DEF Tank Temperature : Not Responding Properly     The DCU detects that the DEF tank temperature is not responding properly. The code is logged.    
3031-18     Aftertreatment #1 DEF Tank Temperature : Low - moderate severity (2)     The DCU detects that the Diesel Exhaust Fluid (DEF) tank temperature is lower than expected.    
3363-7     Aftertreatment #1 DEF Tank Heater : Not Responding Properly     The DCU detects that the DEF tank temperature is not responding properly during a heating cycle. The code is logged.    
5798-7     Aftertreatment #1 DEF Dosing Unit Heater Temperature : Not Responding Properly     The DCU detects that the DEF pump temperature sensor is not responding properly. The code is logged.    
Follow the troubleshooting procedure in order to identify the root cause of the problem.    The 3031-7 code will be logged when the engine is running, the Diesel Exhaust Fluid (DEF) tank temperature is colder than -8° C (17.6° F) and the DEF tank temperature started to rise, but has fallen back below-8° C (17.6° F).The 5798-7 code will be logged when the engine is running, the DEF tank temperature is warmer than -8° C (17.6° F), the DEF tank temperature has increased, but the DEF pump temperature has not changed.
Table 2
Associated Diagnostic Trouble Codes    
J1939 Code    
3363-5    
3363-6    
4354-5    
4354-6    
4355-5    
4355-6    
4356-5    
4356-6    
5491-5    
5491-6    
Table 3
Troubleshooting Test Steps    Values    Results    
1. Check for Associated Diagnostic Trouble Codes
A. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
B. Determine if an associated diagnostic code is present.
    Diagnostic Trouble Codes    
Result: An associated diagnostic trouble code is not present.
Proceed to Test Step 2.
Result: An associated diagnostic trouble code is present.
Troubleshoot the associated code.
   
2. Check the Coolant Level of the Engine
A. Determine if the engine coolant level is full.
   
Coolant Level
   
Result: The coolant level is full.
Proceed to Test Step 3.
Result:The coolant level is not full.
Add coolant to the system.
Determine the cause of low coolant. Refer to Troubleshooting, "Coolant Level Is Low" for additional information.
Proceed to Test Step 3.
   
3. Check for Coolant Leaks
A. Check the entire engine cooling system for signs of coolant leaks.
B. Inspect the coolant supply and return lines to the Pump Electronic Tank Unit (PETU) for leaks or damage that may cause restrictions.
   
Leaks
   
Result: No leaks were detected.
Proceed to Test Step 4.
Result: There were leaks or damaged lines detected.
Repair the leaks or damaged lines and refill the coolant system.
Proceed to Test Step 4.
   
4. Check the Electrical Connection at the DEF Tank Header
A. Inspect the electrical connections to the DEF tank header. Refer to Troubleshooting, "Electrical Connectors - Inspect" for further information.
Refer to Illustration 1.
Look for corrosion or loose wires.
   
Electrical connections
   
Result: The electrical connectors are free of