System Operation Description:
Table 1 lists the diagnostic code that relates to low Aftertreatment Regeneration Device (ARD) temperature.
Note: Refer to Troubleshooting, “Cat ET Service Features” for information about service features.
| Diagnostic Trouble Codes | |||
|---|---|---|---|
| CDL Code | J1939 Code | Code Description (code descriptions may vary) |
Comments |
| E593 (2) | 3711-31 | Aftertreatment Insufficient Temperature to Complete Regeneration | Active regeneration failed due to an inability of the Diesel Particulate Filter (DPF) to reach a high enough temperature. The code is logged. Engine power is derated. |
| Follow the troubleshooting procedure in order to identify the root cause of the problem. | |||
Illustration 1 and Illustration 2 show the location of the components for the ARD system.
Illustration 1 g01985013
ARD combustion head (typical)
(1) Flame detection temperature sensor
(2) Port for the heated nozzle
(3) ARD pilot filter connector
(4) ARD main filter connector
(5) ARD combustion head
(6) Inlet for the combustion air
Illustration 2 g02225997
CEM (typical)
(7) Combustion air valve
(8) Combustion air valve inlet
(9) Combustion air actuator
(10) ARD ignition coil
(11) Combustion air absolute pressure sensor
(12) Combustion air valve controller
(13) Differential pressure sensor
(14) Fuel filter fitting
(15) Cable for CEM connection to the engine
(16) Pilot fuel control valve
(17) Main fuel control valve
(18) Pilot fuel pressure sensor
(19) Main fuel pressure sensor
(20) Combustion air piping
(21) ARD combustion head
(22) Combustion air inlet to ARD combustion head
| Associated Diagnostic Trouble Codes |
|---|
| 102-18 |
| 2489-13 |
| 3487-13 |
| 3480-15 |
| 3480-16 |
| 3480-17 |
| 3480-18 |
| 3556-7 |
| 4077-15 |
| 4077-16 |
| 4077-17 |
| 4077-18 |
| E1050 |
| E1051 |
| E1052 |
| E1053 |
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
| 1. Check for Associated Diagnostic Trouble CodesA. Establish communication between Cat ET and the Electronic Control Module (ECM). Refer to Troubleshooting, “Electronic Service Tools”, if necessary.
B. Download the “Warranty Report” from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. C. Table 2 lists the diagnostic trouble codes that are associated with the E593 (2) or 3711-31 code. Determine if any of the codes in Table 2 are present. |
Diagnostic code | Result: An associated diagnostic trouble code is not present.Proceed to Test Step 2.
Result: An associated diagnostic trouble code is present. Troubleshoot the associated diagnostic code. |
| 2. Check the Current Flow Through the HeaterA. Verify that the engine is off. Check the current flow through the heater. Refer to Systems Operation/Testing and Adjusting, “ARD Nozzle Heater – Test” for the correct procedure. | Between 7.0 A and 14 A for a 12 V system. Or, between 3.5 A and 7 A for a 24 V system | The current flow is between 7.0 A and 14 A for a 12 V system. Or, the current flow is between 3.5 A and 7 A for a 24 V system.Result: The current flow is OK.
Proceed to Test Step 3. Result: The current flow is not between 7.0 A and 14 A for a 12 V system. Or, the current flow is not between 3.5 A and 7 A for a 24 V system. There may be a problem with the ARD nozzle. Refer to Troubleshooting, “ARD Nozzle – Test”. |
| 3. Perform the “ARD Air System Service Test”A. Reset all active codes and clear all logged codes. Use Cat ET to perform an “ARD Air System Service Test” in order to verify that the problem is resolved. Refer to Troubleshooting, “ARD Combustion Air – Test”. | ARD Air System Service Test | Result: The “ARD Air System Service Test” failed.There is a problem with the ARD combustion air. Refer to Troubleshooting, “ARD Combustion Air – Test”.
Result: The “ARD Air System Service Test” passed. Proceed to Test Step 4. |
| 4. Perform a “Manual DPF Regeneration”This test must be performed through Cat ET. The Cat ET service tool enhances the diagnostics during the service test.
A. Clear all diagnostic codes. B. Click the “Disconnect” icon on Cat ET in order to disconnect Cat ET from the engine ECM. C. Turn the keyswitch to the Off position. Wait for five seconds. D. Turn the keyswitch to the On position. E. Click the “Connect” icon on Cat ET in order to connect Cat ET to the engine ECM. F. Start the engine. Allow the engine to idle for three minutes. Do not use the operators switch for a stationary regeneration. The service tests provide enhanced diagnostics that are necessary for proper troubleshooting and repair. G. Start a “Manual DPF Regeneration” in Cat ET. The ECM tests the nozzles for plugging after the “Manual DPF Regeneration” is complete. Approximately 10 minutes are required in order for the test to provide a result. A code will become active if the nozzles are plugged. |
Manual DPF Regeneration | Result: The “Manual DPF Regeneration” completed successfully. There are no additional codes.Return the unit to service.
Result: The “Manual DPF Regeneration” did not complete successfully. Check the list of active diagnostic codes. Troubleshoot the code that applies to the failed regeneration. Refer to Table 2 for associated codes. Result: The “Manual DPF Regeneration” did not complete successfully and there are no associated codes. Proceed to Test Step 5. |
Illustration 3 g02625777
ARD head (typical)
(23) Pilot fitting that contains the filter
(24) Main fitting that contains the filter (If equipped)
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
|
5. Replace the Fittings that Contain the Filter in the ARD Head
A. Replace the fittings that contain the filters in the ARD head. B. Reset all active codes and clear all logged codes by cycling the keyswitch to the Off position. C. Perform the “ARD Ignition Test” using Cat ET. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”. The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET. |
Filter fittings |
Result: The “ARD Ignition Test” was successful and no codes were logged.
Proceed to Test Step 6. Result: The “ARD Ignition Test” was not successful. Proceed to Test Step 7. |
|
6. Perform a “Manual DPF Regeneration”
This test must be performed through Cat ET. The Cat ET service tool enhances the diagnostics during the service test. A. Clear all diagnostic codes. B. Click the “Disconnect” icon on Cat ET in order to disconnect Cat ET from the engine ECM. C. Turn the keyswitch to the Off position. Wait for five seconds. D. Turn the keyswitch to the On position. E. Click the “Connect” icon on Cat ET in order to connect Cat ET to the engine ECM. F. Start the engine. Allow the engine to idle for three minutes. Do not use the operators switch for a stationary regeneration. The service tests provide enhanced diagnostics that are necessary for proper troubleshooting and repair. G. Start a “Manual DPF Regeneration” in Cat ET. The ECM tests the nozzles for plugging after the “Manual DPF Regeneration” is complete. Approximately 10 minutes are required in order for the test to provide a result. A code will become active if the nozzles are plugged. |
Manual DPF Regeneration |
Result: The “Manual DPF Regeneration” completed successfully. There are no additional codes.
Return the unit to service. Result: The “Manual DPF Regeneration” did not complete successfully. Check the list of active diagnostic codes. Troubleshoot the code that applies to the failed regeneration. Refer to Table 2 for associated codes. Result: The “Manual DPF Regeneration” did not complete successfully and there are no associated codes. Proceed to Test Step 7. |
|
7. Replace the ARD Combustion Head
A. Replace the ARD combustion head. Refer to Special Instruction, REHS4824, “Replacement of the ARD Combustion Head on Caterpillar Products with Clean Emissions Modules”. B. Clean the ARD combustion canister. |
ARD combustion head |
Result: The ARD head was replaced.
Proceed to Test Step 8. |
|
8. Perform an ARD Ignition Test
A. Reset all active codes and clear all logged codes. Perform an ARD Ignition Test. Refer to System Operation and Testing and Adjusting , “ARD Fuel System – Test”. The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET. |
ARD ignition test |
Result: The ARD Ignition Test was successful.
Proceed to Test Step 9. |
|
9. Perform a “Manual DPF Regeneration”
This test must be performed through Cat ET. The Cat ET service tool enhances the diagnostics during the service test. A. Clear all diagnostic codes. B. Click the “Disconnect” icon on Cat ET in order to disconnect Cat ET from the engine ECM. C. Turn the keyswitch to the Off position. Wait for five seconds. D. Turn the keyswitch to the On position. E. Click the “Connect” icon on Cat ET in order to connect Cat ET to the engine ECM. F. Start the engine. Allow the engine to idle for three minutes. Do not use the operators switch for a stationary regeneration. The service tests provide enhanced diagnostics that are necessary for proper troubleshooting and repair. G. Start a “Manual DPF Regeneration” in Cat ET. The ECM tests the nozzles for plugging after the “Manual DPF Regeneration” is complete. Approximately 10 minutes are required in order for the test to provide a result. A code will become active if the nozzles are plugged. |
Manual DPF Regeneration |
Result: The “Manual DPF Regeneration” completed successfully. There are no additional codes.
Return the unit to service. Result: The “Manual DPF Regeneration” did not complete successfully. There are additional codes. Troubleshoot the additional codes before returning the unit to service. Refer to Troubleshooting for the correct procedure. Verify that the problem is resolved. |
Test Step 1.
Complete the procedure in the order in which the steps are listed.
Results:
- The procedure corrected the issue. – STOP
- The procedure did not correct the issue. –Repair: Contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
STOP