STEM 8M2713 - 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. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".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 become logged or cleared for 5 minutes.Clear all "Active" codes using Cat ET before proceeding with the following procedure. Refer to Troubleshooting, "Diagnostic Capabilities - Clearing Active Codes for On Board Diagnostics (OBD)" for more information on clearing "Active" codes.
Table 1
Diagnostic Trouble Codes    
CDL Code    J1939 Codes    Code Description
(code descriptions may vary)    Comments    
E995 (2)     3719-16     High DPF #1 Soot Loading     The estimated soot load is high. The ECM shuts down the engine when this code becomes active for the first time. The engine can be started and operated. Engine power is gradually derated as the soot load increases.    
E995 (3)     3719-0     High DPF #1 Soot Loading     The estimated soot load is high. Engine operation is limited to 60 second intervals when the Caterpillar Electronic Technician (ET) is not communicating with the ECM.    
E991 (3)     3715-31     DPF Active Regeneration Inhibited Due to Permanent System Lockout     The estimated soot load is high. The engine may not operate properly. Factory passwords are required in order to clear this code.    
E992 (3)     3714-31     DPF Active Regeneration Inhibited Due to Temporary System Lockout     The engine has been running for10 minutes after the E995 (3) code was activated.
The Cat ET Manual Diesel Particulate Filter Regeneration must be initiated.    
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. E995 (2) or 3719-16
2. E995 (3) or 3719-0
3. E991 (3) or 3715-31
4. E992 (3) or 3714-31
   
Codes
   
Result: A E991 (3) or 3715-31