DEF Does Not Purge
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.
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| 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. |
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| 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" |
- Codes
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| 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. Perform a "DEF Dosing System Verification Test" A. Turn the AC and DC breakers to the ON position. B. Connect Cat ET. B. Use Cat ET to perform the following diagnostic test: - "DEF Dosing System Verification Test" |
Test |
Result: The 3362-13 cleared. Return to service. Result: A code remains active and another code becomes active. Repair: Troubleshoot the code that came active during the service test. Repeat Test Step 2 after repairs are completed to clear the active or logged codes. |
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).
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