C280 Marine Engines Caterpillar

Use this procedure in order to troubleshoot low prelubrication oil pressure. Also, use this procedure if one of the following event codes is active or logged.

Table 1

J1939 Code and Description	CDL Code and Description	Comments
3029-31 Engine start inhibited, pre-lube system issue : Condition Exists	N/A	The engine is not allowed to start. The code is logged.
3551-17 Engine Oil Priming State : Low - least severe (1)	E233 (1) Low Engine Pre-Lube Pressure	The engine is not allowed to start. The code is logged.

Probable Causes

• Codes

• Oil level

• Power

• Prelubrication pump

Recommended Actions

Table 2

Troubleshooting Test Steps	Values	Results
1. Check for Codes A. Connect Cat® Electronic Technician (ET) to the service tool connector. B. Look for active codes that are associated with the system for the event code.	Codes	Result: An associated code is active. Repair: Troubleshoot any associated codes before continuing with this test. Result: A code is active or logged. Proceed to Test Step 2.
2. Check the Engine Oil Level	Oil Level	Result: The engine oil is not low. Proceed to Test Step 3. Result: The engine oil level is low. Repair: Perform the following procedure: 1. Add engine oil. Refer to Operation and Maintenance Manual, "Engine Oil" for the recommendations of engine oil. 2. Start the engine. Inspect the exterior of the engine for oil leaks. Repair any oil leaks. 3. Inspect the exterior of the engine for oil leaks. Repair any oil leaks. If the problem is not resolved, proceed to Test Step 3.
3. Check the Electrical Power to the Prelube Pump Motor A. Ensure that the prelube pump motor is wired correctly. Refer to Troubleshooting, "Solenoid Valve - Test" for additional information.	Power	Result: The pump is powered when called for. Proceed to Test Step 4. Result: The pump is not receiving power when called for. Repair: Repair or replace damaged electrical components. If the problem is not resolved, proceed to Test Step 4.
4. Check for Inadequate Prelubrication Pump Pressure A. Connect Cat ET. B. Use Cat ET to monitor the following parameter during the prelube cycle: - "Engine Oil Pressure" Note: The ECM must detect an oil pressure of 41 kPa (6 psi) for the programmed "Engine Ready to Start Prelube Duration" before the engine is cranked.	Pressure	Result: The pressure is NOT OK. Repair: Repair or replace damaged prelubrication pump. Verify that the repair eliminated the problem.

If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).