SCREEN 6P1407 - Caterpillar

Use this procedure to troubleshoot a Diesel Exhaust Fluid (DEF) system purge failure. Also, use this procedure if the following event code is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
3362-31
Aftertreatment #1 DEF Dosing Unit Input Lines E114 (2)
Aftertreatment #1 DEF Dosing Unit Input Lines Not Purged The DEF system has failed to purge.
Table 2
Associated Codes
J1939 Code CDL Code Troubleshooting Procedure
6875-16 E930 (2) Troubleshooting, "DEF Pressure Is High"
6875-18 E930 (1) Troubleshooting, "DEF Pressure Is Low" Probable Causes
CodesRecommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Look for active codes that are associated with the system for the event code.
Codes
Result: An associated code is active.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: A code is active.
Proceed to Test Step 2.
2. Operate the Engine
A. Turn the AC and DC breaker to the ON position.
B. Start the engine.
C. Run the engine to run until normal operating temperature is reached.
D. Connect Cat ET.
E. Use Cat ET to monitor the following:
- "Aftertreatment System State"
F. Check for codes when the "Aftertreatment System State" reads "Normal Dosing".
Codes
Result: A code is not active.
Return to service.
Result: A code remains active while running the engine and another code becomes active.
Repair: Troubleshoot the code that came active while running the engine.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).