YOKE 2299744 - Caterpillar

Use this procedure in order to troubleshoot a high pressure at the outlet of the jacket water pump. Use this procedure if the following event code is active. Refer to Troubleshooting, "Event Codes" for information about event codes and the default trip points for these codes. You must access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes.
Table 1
Event Code    
Description    Conditions which Activate the Code    System Response    
E224(3) High Jacket Water Inlet Pressure     The crank terminate relay is set and the engine has been running for at least ten seconds. The trip point for high pressure at the inlet for the jacket water has been exceeded and the delay time has expired.     The fuel is shut off. The shutdown output is activated. The code is logged.    Probable Causes
There is a problem with the circuit for the pressure switch at the jacket water pump's outlet.
The pressure at the jacket water pump's outlet is excessive.Recommended Actions
Check the Circuit of the Pressure Switch for the Outlet of the Jacket Water Pump
The contact for the switch's terminals "A" and "B" is normally open. The contact for the switch's terminals "B" and "C" is normally closed.If the pressure at the outlet for the jacket water pump rises to 462 41 kPa (67 6 psi), the contact for the switch's terminals "A" and "B" is closed and the contact for terminals "B" and "C" is opened.If the contacts are abnormally shorted or opened, check the connectors and the wiring for damage or corrosion. Refer to Troubleshooting, "Electrical Connectors - Inspect".If a problem with the connectors and/or the wiring is found, make repairs, as needed. Replace parts, if necessary.Check the Outlet Pressure of the Jacket Water Pump
Use a gauge to check the pressure at the outlet for the jacket water pump.If the pressure is less than 462 41 kPa (67 6 psi) and the E224 code is active, replace the pressure switch.If a pressure of at least 462 41 kPa (67 6 psi) is measured at the outlet for the jacket water pump, the high pressure may be caused by excessive head pressure. The high pressure could also be caused by obstructions in the coolant passages after the jacket water pump. Inspect the system. Make repairs, as needed.