SEAL 1063327 - Caterpillar

Note: Use this procedure only if the engine shutdown completely and it was necessary to restart the engine.Probable Causes
Diagnostic codes or event codes
Operating conditions
Electrical connections
Faulty remote shutdown
Circuit breakers
Fuel supply
Faulty overspeed verify switchNote: If the problem only occurs under certain conditions such as high engine speed, full load or engine operating temperature, then perform the test under those operating conditions.Recommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Check for Diagnostic and Event Codes
A. Certain diagnostic codes and/or event codes may cause the engine to shutdown. Connect the Cat™ ET and check for active codes and/or for logged codes.
Codes
Result: There are no codes present.
Proceed to Test Step 2.
Result: There are codes present.
Repair: Troubleshoot any codes that are present before continuing with this procedure.
2. Check the Operating Conditions
A. The engine may be shutdown due to low-pressure levels or other factors. Connect Cat ET and check for active shutdowns or diagnostic codes.
B. If a shutdown is active, "Injection Disabled" will appear in the third box of any status screen on Cat ET.
C. An engine shutdown event will appear on a J1939 device if the device is capable of displaying diagnostic codes.
Operating Conditions
Result: There is no shutdown active.
Proceed to Test Step 3.
Result: There is an active shutdown.
Repair: Troubleshoot the source of the shutdown and make necessary repairs or modifications.
3. Check the Electrical Connections
A. Check the following connectors for proper installation:
• J1/P1 and J2/P2 connectors for the Electronic Control Module (ECM)
• J61/P61 Customer connectors
• J300/P300 Connectors for the injector solenoid harness
• J401/P401 and J402/P402 Engine speed/timing sensor connectors
B. Check the associated wiring for the following conditions: damage, abrasion, corrosion, and incorrect attachment. Refer to Troubleshooting, "Electrical Connectors - Inspect".
C. Aftermarket engine protection devices usually interrupt power to the ECM. Check for correct installation and for operation of aftermarket engine protection devices. It may be necessary to bypass the aftermarket devices in order to continue testing.
Electrical Connections
Result: The electrical connections are OK.
Proceed to Test Step 4.
Result: The electrical connections are NOT OK.
Repair: Repair or replace any worn or damaged components.
Table 2
"User Shutdown" Status Measured Voltage at J1-44 or P61-27
ON <0.9 VDC
OFF >10 VDC
Table 3
Troubleshooting Test Steps Values Results
4. Check for a Faulty Remote Shutdown
A. Access the status screen that displays the remote shutdown switch status. The remote shutdown switch status on Cat™ ET is called "User Shutdown".
B. Refer to Table 2. Measure the voltage between each terminal that is listed and the engine ground.
Faulty Remote Shutdown
Result: The voltage is in the range listed in the table.
Proceed to Test Step 5.
Result: The voltage is not in the range listed in the table.
Repair: Refer to Troubleshooting, "Switch Circuits - Test".
5. Check the Circuit Breakers
Note: The circuit breakers may exceed the trip point due to overheating.
Circuit Breakers
Result: The circuit breakers are NOT tripped.
Proceed to Test Step 6.
Result: The circuit breakers are tripped.
Repair: Reset the circuit breakers.
6. Check the Fuel Supply
A. Check for a problem with the fuel supply. Verify that the fuel pressure is correct. Verify that the fuel pressure sensor is installed. Refer to Systems Operation/Testing and Adjusting,