SUPPORT AS 2514875 - Caterpillar

Table 1
Diagnostic Trouble Code for DEF Tank Temperature Is High
J1939 Code CDL Code Description
(code descriptions may vary) Notes
3031-16 E960 (2) Catalyst Tank Temperature : High - moderate severity (2) The temperature of the Diesel Exhaust Fluid (DEF) in the DEF tank has exceeded the parameter programmed in the ECM.
The code is logged.
The engine is derated.
Follow the troubleshooting procedure to identify the root cause of the problem. Complete the procedure in the order in which the steps are listed.
Table 2
Associated Diagnostic Trouble Codes
J1939 Code CDL Code
110-0 E361 (1)
110-15 E361 (2)
110-16 E361 (3)
Table 3
Troubleshooting Test Steps Values Results
1. Check for Associated Codes
A. Connect to the electronic service tool.
B. Determine if an associated code is present.
Associated code
Result: An associated code is present.
Repair: Troubleshoot the associated code. Refer to Troubleshooting, "Diagnostic Trouble Codes" for the correct procedure.
After the repairs have been made, proceed to Test Step 6.
Result: An associated code is not present.
Proceed to Test Step 2.
2. High Ambient Air Temperature
A. Determine if the ambient air temperature is within the design specifications for the cooling system.
Ambient Air temperature
Result: The ambient air temperature is not within the design specifications for the system.
Repair: Contact the Dealer Solutions Network (DSN) for advice on modifications to make the system suitable for local conditions.
After repairs have been made, proceed to Test Step 6.
Result: The ambient air temperature is within the design specifications.
Proceed to Test Step 3.
3. Check the Electrical Connections
A. Inspect the electrical connections to the coolant diverter valve. Inspect all electrical connections to the Diesel Exhaust Fluid (DEF) tank header. Refer to Troubleshooting, "Electrical Connectors - Inspect" for further information.
B. Inspect for corrosion or loose wires.
Corrosion
Result: The connections are free of corrosion and are not loose.
Proceed to Test Step 4.
Result: The connections are corroded and/or are loose.
Repair: Make the necessary repairs.
Proceed to Test Step 6.
4. Check the Coolant Supply and Return Lines for Correct Installation
A. Inspect the coolant supply and return lines from the engine to the DEF tank, including the coolant diverter valve. Make sure that the coolant is flowing in the correct direction through all components.
Correct installation
Result: The lines are installed correctly.
Proceed to Test Step 5.
Result: The lines are not installed correctly.
Repair: Correctly install the lines. Proceed to Test Step 6.
5. Check the Coolant Diverter Valve Solenoid for Proper Operation
A. Turn the keyswitch to the OFF position.
B. Disconnect the wiring harness connector from the coolant diverter valve.
C. Turn the keyswitch to the ON position.
D. Connect to the electronic service tool.
E. Start the engine. Allow the engine to warm to operating temperature.
F. Use the electronic service tool to monitor the "DEF Tank Temperature". Ensure that the DEF tank temperature is responding correctly.
G. Turn the keyswitch to the OFF position.
Temperature rise
Result: The DEF tank temperature did not increase.
Connect the coolant diverter valve to the wiring harness.
Contact the Dealer Solutions Network (DSN).
Result: The DEF tank temperature increased.
Repair: The coolant diverter valve is not operating correctly. Replace the coolant diverter valve. Refer to Disassembly and Assembly, "Solenoid Valve (DEF Heater Coolant) - Remove and Install".
Proceed to Test Step