C7.1 Engines and Generator Sets Caterpillar

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 down the engine. 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 stopped while the exhaust temperatures were still above the acceptable threshold.

Use this procedure to troubleshoot the following event codes.

Table 1

Diagnostic Trouble Codes for Engine Shutdown Occurrence
J1939 Code	CDL Code	Code Description (code descriptions may vary)	Comments
970-15	E265 (1)	User Defined Shut down	The inputs from the user-defined shutdown switch to the Electronic Control Module (ECM) have changed states. The engine will stop. The code is logged.
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 6588-31 (E1466) 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 970-15 (E265) Code

• Activated shutdown switch

• Circuit for the shutdown switch

Table 2

Associated Diagnostic Trouble Codes
J1939 Code	CDL Code
4215-31	E678 (3)
1237-0	E1217 (3)

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

Table 3

Troubleshooting Test Steps	Values	Results
1. Determine the Code A. Establish communication between the electronic service tool 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" to troubleshoot the associated diagnostic code. Note: Troubleshoot the associated code before continuing with this procedure. Result: A 6588-31 or E1466 (1) code is active or logged. Proceed to Test Step 2. Result: A 970-15 (E265 (1)) code is active or logged. Proceed to Test Step 5.
2. Delayed Engine Shutdown Note: This Test Step is only applicable to applications that do not have a DEF injector cooling tank. Applications that have a DEF injector cooling tank should have Delayed Engine Shutdown disabled. For these applications, proceed to Test Step 3. A. Check if "Delayed Engine Shutdown" is enabled. B. Connect to the electronic service tool and then 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 fault.
3. Fuel A. Check the engine fuel supply.	Fuel	Result: The engine is out of fuel. Repair: Fill the fuel tank with fuel of the correct specification. Verify that the repair eliminated the fault. Result: The engine is not out of fuel. Proceed to Test Step 4.
4. Mechanical Failure A. Check for a mechanical failure.	Mechanical failure	Result: A mechanical failure has occurred. Repair: Diagnose and then repair the fault. Verify that the repair eliminated the fault.
5. Activated Shutdown Switch A. Interview the operator and determine the reason for the emergency stop shutdown.	Emergency shutdownswitch	Result: The emergency stop shutdown was activated. Repair: Diagnose and repair the fault. Verify that the repair eliminated the fault. Result: The emergency shutdown was not activated. Proceed to Test Step 6.
6. 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 correctly or there is a fault in the emergency shutdown circuit. Repair: Repair or replace the failed component. Verify that the repair eliminated the fault. If the fault is still present, contact the Dealer Solutions Network (DSN).