The “Delayed Engine Shutdown” (DES) feature allows the engine to run after the keyswitch has been turned to the OFF position. “Delayed Engine Shutdown” (DES) allows the engine and exhaust temperatures to cool to an acceptable level prior to shutting the engine down. If the delayed engine shutdown is aborted, potential damage to the engine and/or aftertreatment system can occur. These fault codes may indicate that the engine was shut down while the exhaust temperatures were still above the acceptable threshold.
Use this procedure in order to troubleshoot the following event codes.
| Diagnostic Trouble Codes | |||
|---|---|---|---|
| J1939 Codes | CDL Code | Code Description (code descriptions may vary) |
Comments |
| N/A | E265 (1) | User Defined Shutdown | The inputs from the user defined shutdown switch to the Electronic Control Module (ECM) have changed states. The engine will shut down. The code is logged. |
| N/A | E265 (2) | User Defined Shutdown | The inputs from the user defined shutdown switch to the Electronic Control Module (ECM) have changed states. The engine will shut down. The code is logged. |
| N/A | E265 (3) | User Defined Shutdown | The inputs from the user defined shutdown switch to the Electronic Control Module (ECM) have changed states. The engine will shut down. The code is logged. |
| N/A | E268 (3) | Unexpected Engine Shutdown | The engine has stopped unexpectedly. The engine speed is 0 while the ECM is requesting engine speed. |
| 6588-31 | E1466(1) | Operator Shutdown With High Exhaust Temperature | The Engine was stopped before cooling of the exhaust system could complete. Allow Delayed Engine Shutdown to complete. |
Probable Causes for a E1466 or 6588-31 Code
- An operator turning the keyswitch to the fourth position or forcing a shutdown prior to DES completing
- DES may not be enabled
- Fuel ran out prior to DES completion
- Mechanical failure causing the engine to stop prior to DES completion
Probable Causes for a E265 Code
- Activated shutdown switch
- Circuit for the shutdown switch
Probable Causes for a E268 Code
- Operator caused the engine to stall
- Fuel supply
- Mechanical Failure
| Associated Diagnostic Trouble Codes |
| E678 |
| 4215-31 |
| E1217 |
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
|
1. Determine the Code
A. Establish communication between Caterpillar Electronic Technician (ET) and the 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. Determine the event code. |
Active codes |
Result: An associated code is active.
Refer to Troubleshooting, “Event Codes” in order to troubleshoot the associated diagnostic code. Result: A E265 code is active or logged. Proceed to Test Step 6. Result: A E268 (3) code is active or logged. Proceed to Test Step 3. Result: A E1466 or 6588-31 code is active or logged. Proceed to Test Step 2. |
|
2. Delayed Engine Shutdown
A. Check if “Delayed Engine Shutdown” is enabled. B. Connect to Cat® ET, navigate to the “Configuration” tab in the engine ECM. Select the “Delayed Engine Shutdown” tab and check the status of the parameter. |
Delayed Engine Shutdown |
Result: “Delayed Engine Shutdown” is enabled.
Proceed to Test Step 3. Result: “Delayed Engine Shutdown” is not enabled. Enable “Delayed Engine Shutdown”. Verify that enabling “Delayed Engine Shutdown” eliminated the problem. |
|
3. Proper Engine Operation
A. Interview the operator and determine the events that caused the engine to stall. B. Delayed engine shutdown (DES) may not have completed. |
Operator |
Result: The operator is operating the engine correctly.
Proceed to Test Step 4. Result: The operator is not operating the engine correctly. Operate the engine correctly. |
|
4. Fuel
A. Check the engine fuel supply. |
Fuel |
Result: The engine is out of fuel.
Supply the engine with an adequate fuel supply. Verify that the repair eliminated the problem. Result: The engine is not out of fuel. Proceed to Test Step 5. |
|
5. Mechanical Failure
A. Check for a mechanical failure. |
Mechanical failure |
Result: A mechanical failure has occurred.
Diagnose the problem and then repair the problem. Verify that the repair eliminated the problem. |
|
6. Activated Shutdown Switch
A. Interview the operator and determine the reason for the emergency stop shutdown. |
Switch |
Result: The emergency stop shutdown was activated.
Diagnose the problem and then repair the problem. Verify that the repair eliminated the problem. Result: The emergency shutdown was not activated. Proceed to Test Step 7. |
|
7. Check the Emergency Shutdown Switch Circuit
A. Inspect the stop switches for evidence of damage that has been caused by vibration, moisture, or corrosion. B. Check the circuit for the shutdown switch. Refer to Troubleshooting, “Shutdown (Ground Level) – Test”. |
Emergency shutdown switch circuit |
Result: The emergency stop shutdown switch is not operating properly or there is a problem with the emergency shutdown circuit.
Repair or replace the failed component. Verify that the repair eliminated the problem. |
Complete the procedure in the order in which the steps are listed.
