C13 Industrial Engine Caterpillar

Use this procedure in order to troubleshoot excessive soot in the Diesel Particulate Filter (DPF). Also use this procedure if one of the following event codes are active. Refer to Troubleshooting, "Event Codes" for information about event codes.

Note: Certain systems will display multiple codes for troubleshooting. These "Associated Codes" must be used in order to troubleshoot the system effectively. Refer to Troubleshooting, "General Information" for additional information.

Note: Refer to Troubleshooting, "Cat ET Service Features" for information about service features.

The Engine Control Module (ECM) maintains an estimate of the soot load in the Diesel Particulate Filter (DPF). The estimate is based on the engine operating conditions. If the ECM estimates that the soot load is excessive, the ECM activates the applicable code.

Note: After the regeneration is complete and soot loading is reduced to 0%, the active soot loading code will not move to logged or cleared for 5 minutes.

Table 1

Diagnostic Trouble Codes
J1939 Codes	Code Description (code descriptions may vary)	Comments
3715-31	Particulate Active Regeneration Inhibited Due to Permanent System Lockout	The estimated soot load is high. The engine will have a 100% derate and will shut down 5 minutes after the code becomes active.
3719-0	Particulate Trap #1 Soot Load Percent : High - most severe (3)	The estimated soot load is high. Engine will shut down 5 minutes after the code becomes active. Engine may be restarted.
3719-16	Particulate Trap #1 Soot Load Percent : High - moderate severity (2)	The estimated soot load is high.
Follow the troubleshooting procedure in order to determine the root cause of the problem.

Note: Engine operation must be kept to a minimum in order to minimize the amount of soot that is created. Follow the troubleshooting procedure in order to minimize the amount of engine operation.

Troubleshooting Procedure

Table 2

Troubleshooting Test Steps	Values	Results
1. Active Codes and Logged Codes A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM). B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Look for the following codes: 1. 3719-16 2. 3719-0 3. 3715-31	Codes	Result: A 3715-31 code is present. Proceed to Test Step 2. Result: One of the following codes are present: 1. 3719-16 2. 3719-0 Proceed to Test Step 3.
2. 3715-31 code A. The 3715-31 code indicates that the engine has continued to run after repeated warnings and engine shutdowns. The DPF must be replaced. Refer to the Disassembly and Assembly, "Diesel Particulate Filter - Remove and Install (Clean Emissions Module)" for the correct procedure. B. The DPF Ash model must be reset after DPF is replaced. Refer to Troubleshooting, "Cat ET Service Features, DPF Ash Service" for information on resetting the ash model.	DPF	Result: A 3715-31 code is present. Replace the DPF. Refer to the Disassembly and Assembly, "Diesel Particulate Filter - Remove and Install (Clean Emissions Module)" for the correct procedure. After the DPF has been replaced, clear the 3715-31 code ( a factory password will be necessary) and proceed to Test Step 3

Table 3

Associated Diagnostic Trouble Codes
2771-7
3609-15
3711-31
3750-31

Table 4

Troubleshooting Test Steps	Values	Results
3. Associated Codes A. Establish communication between Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM). B. Check Cat ET for any associated codes that are listed in Table 3.	Associated codes	Result: An associated code is active or logged. Troubleshoot any codes that are present before continuing with this procedure. Result: An associated code is not active or logged. Proceed to Test Step 4.

Table 5

Troubleshooting Test Steps	Values	Results
4. Manual DPF Regeneration A. Start a "Manual DPF Regeneration" in Cat ET.	Manual DPF Regeneration	Result: The "Manual DPF Regeneration" was successful. Return the engine to service. Result: The "Manual DPF Regeneration" not was successful. Troubleshoot the diagnostic codes that are present.

Complete the procedure in the order in which the steps are listed.