90840 Mercruiser PULLEY, WATER PUMP (HIGH MOUNTED P/S PUMP)

Table 1
Associated Diagnostic Trouble Codes
J1939 Code Descriptions
157 Common Rail - Low Fuel Rail Pressure
5584 Fuel Filter Restriction
1347 Common Rail Solenoid
1348 Fuel Rail #1 Pressure Valve Solenoid
5580 Low Fuel Pressure Probable Causes
Diagnostic Codes
Event Codes
Fuel Supply
Engine shutdown switches (if applicable)
Starting aids (if equipped)
Engine Speed/Timing
Fuel PressureRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Inspection of the Fuel Supply
A. Visually check the fuel level in the fuel tank. Do not rely on the fuel gauge only.
B. Ensure that the fuel supply valve (if equipped) is in the full OPEN position.
Fuel Level
Result : The fuel level is OK.
Proceed to Test Step 2.
Result : The fuel level is not OK.
Repair : Fill the tank.
If the problem is not resolved, proceed to Test Step 2.
2. Check the Engine Shutdown Switches (if applicable)
A. The engine shutdown switches must be in the OFF position.
B. Use Caterpillar®Electronic Technician (Cat ET) to verify the status of the engine shutdown switches. When a shutdown occurs, the keyswitch must be turned to the OFF position for at least 15 seconds before restarting the engine.
Engine Shutoff Switches
Result : The switches are in the OFF position.
Proceed to Test Step 3.
Result : The switches are not in the OFF position.
Repair : Turn the switches to the OFF position.
If the problem is not resolved, proceed to Test Step 3.
3. Check the Engine Starting Aids (if applicable)
A. If cold ambient conditions exist, check the operation of the starting aids. Verify that the starting aid is operating correctly.
Starting Aids
Result : The starting aid is operating correctly.
Proceed to Test Step 4.
Result: The starting aid is not operating correctly.
Repair : Refer to the appropriate circuit test in order to troubleshoot the starting aid.
If the problem is not resolved, proceed to Test Step 4.
4. Restrictions in the Air Inlet and Exhaust System
A. Check for an air filter restriction indicator.
B. Check the air inlet and exhaust system for restrictions and/or leaks.
Air and Exhaust System Restrictions
Result : There are no system restrictions.
Proceed to Test Step 5.
Result : There are system restrictions.
Refer to Testing and Adjusting, "Air Inlet and Exhaust System - Inspect" for more information on air system restrictions.
Repair : Replace plugged air filters. Refer to the Operation and Maintenance Manual for the correct procedure.
If the problem is not resolved, proceed to Test Step 5.
5. Check for Activation of the Theft Deterrent System (if applicable)
A. Verify that the theft deterrent system is not active.
Theft Deterrent System
Result : The theft deterrent system is not active.
Proceed to Test Step 6.
Result : The theft deterrent system is active.
Repair : Turn the theft deterrent system OFF.
If the problem is not resolved, proceed to Test Step 6.
6. Check the Engine Speed/Timing Signal for Proper Operation
A. Crank the engine and observe the engine speed on the Cat ET status screen. Refer to Troubleshooting, "Speed/Timing - Test" for additional information.
Upon initial cranking, the status for engine speed may indicate that the engine speed signal is abnormal. This message will be replaced with an engine speed once the ECM is able to calculate a speed from the signal.
Timing Signal
Result : The timing sensor is operating properly.
Proceed to Test Step 7.
Result : The timing sensor is not operating properly.
Repair : Refer to Troubleshooting, "Speed/Timing - Test" for troubleshooting information.
If the problem is not resolved, proceed to Test Step 7.
7. Inspect the Low-Pressure Fuel System
A. Inspect the fuel system. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for additional information.
B. Cold weather adversely affects the characteristics of the fuel. Refer to the engines Operation and Maintenance Manual for information on improving the characteristics of the fuel during cold-weather operation.
C. Check fuel quality. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for the proper procedure. Check the fuel tank for debris or foreign objects which may block the fuel supply.
D. Check the filtered fuel pressure while the engine is being cranked. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for the test procedure and for the correct pressure values.
If the fuel pressure is low, replace the fuel filters. Clean the primary filter/water separator of debris. Refer to the Operation and Maintenance Manual for details.
E. Check for the proper operation of the fuel transfer pump. Refer to Systems Operation/Testing and Adjusting, "Fuel System" for test information.
Low-Pressure Fuel System
Result : The low-pressure fuel system is operating properly.
Proceed to Test Step 8.
Result : The low-pressure fuel system is not operating properly.
Repair : Make the necessary repairs. Return the engine to service.
If the problem is not resolved, proceed to Test Step 8.
8. Inspect the High-Pressure Fuel System
A. Perform the Testing and Adjusting, "Injector Bypass Fuel Flow - Test" to test the high-pressure fuel system.
High-pressure Fuel System
Result : The high-pressure fuel system is not operating properly.
Repair : Make the necessary repairs. Return the engine to service.
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).