3412E Engine for 773E Off-Highway Trucks Caterpillar

Engine Shutdown Occurrence

Usage:

773E PRB

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.

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Table 1
Diagnostic Trouble Codes
J1939 Codes	CDL Code	Code Description (code descriptions may vary)	Comments
N/A	E1217(3)	Delayed Engine Shutdown Override	The Engine was stopped before cooling of the exhaust system could complete. Allow Delayed Engine Shutdown to complete.

Probable Causes for a E1217 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 E678(2) Code

Activated shutdown switch
Circuit for the shutdown switch

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Table 2
Associated Diagnostic Trouble Codes
E678

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Table 3
Troubleshooting Test Steps	Values	Results
1. Determine the Code A. Establish communication between Cat^® 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. Repair: Refer to Troubleshooting, "Event Codes" in order to troubleshoot the associated diagnostic code. Troubleshoot the associated code before continuing with this procedure. Result: A E1217 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. Repair: 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. Repair: Operate the engine correctly.
4. Fuel A. Check the engine fuel supply.	Fuel	Result: The engine is out of fuel. Repair: 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. Repair: 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 Ground Level shutdown.	Switch	Result: The Ground Level shutdown was activated. Repair: Diagnose the problem and then repair the problem. Verify that the repair eliminated the problem. Result: The Ground Level shutdown was not activated. Proceed to Test Step 7.
7. Check the Ground Level 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: Repair or replace the failed component. Verify that the repair eliminated the problem.