C1.5 and C2.2 Engines for Caterpillar Built Machines Caterpillar

Engine Shutdown Occurs Intermittently

Usage:

CB-22B 2B2

Note: Use this procedure only if the engine shuts down completely and the engine must be restarted.

Use one of the following methods to check for active diagnostic codes:

Electronic Service Tool

Connect the electronic service tool to the diagnostic connector.
Check for active diagnostic codes on the electronic service tool.
Investigate any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".

Display on the Control Panel

Note: The following procedure is only applicable if the application is equipped with a display on the control panel.

Check the display on the control panel for active diagnostic codes.
Troubleshoot any active codes before continuing with this procedure. Refer to Troubleshooting, "Troubleshooting with a Diagnostic Code".

Check for correct installation of connectors at the following locations:
- ECM connectors
- Speed sensor connectors
- Connector for the solenoid on the fuel rack
Refer to Troubleshooting, "Electrical Connectors - Inspect".
Inspect the battery cables from the ECM to the battery compartment. Refer to the Schematic Diagram. Inspect the cables and the power relay. Check the power and ground connections to the ECM. Refer to the schematic diagram for more information.
Repair any faults and ensure that the symptom has been cleared. If the symptom is still present, refer to "Fuel Supply".

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NOTICE

Do not crank the engine continuously for more than 30 seconds. Allow the starting motor to cool for two minutes before cranking the engine again.

Visually check the fuel tank for fuel. The fuel gauge may be faulty.
Ensure that the fuel supply valve (if equipped) is in the full OPEN position.
If the temperature is below 0 °C (32 °F), check for solidified fuel (wax).
If equipped, check the water separator for water in the fuel.
Check for fuel supply lines that are restricted.
Check that the Electric Fuel Lift Pump (EFLP) is operating. If the EFLP is suspect, refer to Troubleshooting, "Fuel Pump Relay Circuit - Test".
Check that the low-pressure fuel lines are tight and secured properly.
If equipped, replace the fuel pre-filter. Replace the main fuel filter.
Check the diesel fuel for contamination. Refer to Systems Operation, Testing, and Adjusting, "Fuel Quality - Test".
Check for air in the fuel system. Refer to Systems Operation, Testing, and Adjusting, "Air in Fuel - Test".
Ensure that the fuel system has been primed. Refer to Systems Operation, Testing, and Adjusting, "Fuel System - Prime".
If the fault has not been eliminated, contact the Technical Communicator at a Cat® dealer.