856936A 2 Mercury PISTON ASSEMBLY

Table 1
Diagnostic Trouble Codes
J1939 Code CDL Code Code Description Comments
5580–0 E198 (3) Low Fuel Pressure The code is logged.
The engine may be shut down.
The Electronic Control Module (ECM) will illuminate the action lamp.
5580-17 E198 (1) Low Fuel Pressure The code is logged.
5580-18 E198 (2) Low Fuel Pressure The code is logged.
The engine power is derated.
The Electronic Control Module (ECM) will illuminate the warning lamp.
Table 2
Troubleshooting Test Steps Values Results
1. Determine the Code
A. Connect the electronic service tool to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Determine if a diagnostic trouble code is present or an associated code is present.
Codes
Result: An E198 or 5580 code is present.
Proceed to Test Step 2.
2. Check the Fuel Level in the Tank
A. Visually inspect the fuel level in the fuel tank. Ensure that the fuel tank contains enough fuel to operate the engine.
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 3.
Result: The fuel level is not OK.
Repair: Fill the tank. Verify that the problem has been resolved.
If the problem is not resolved, proceed to Test Step 3.
3. Inspect the Fuel System for Leaks
A. Perform a visual inspection of the fuel system. Verify that there are no fuel leaks. Inspect the fuel lines from the fuel transfer pump to the secondary fuel filter base for restrictions. Refer to Systems Operation, Testing and Adjusting, "Fuel System - Inspect" for additional information.
Leaks in the Fuel System
Result: No leaks were found.
Proceed to Test Step 4.
Result: Leaks were found in the fuel system.
Repair: Repair the leaks. Verify that the problem is resolved.
If the problem is not resolved, proceed to Test Step 4.
4. Replace the Fuel Filters
A. Replace the primary filter and the secondary filter. Refer to Operation and Maintenance Manual for the correct procedure.
B. Reset all active codes by cycling the keyswitch to the OFF position for 2 minutes.
C. Prime the fuel system. Ensure that the fuel system is primed.
Fuel Filters
Result: The problem has been resolved.
Return the engine to service.
Result: The problem has not been resolved.
Proceed to Test Step 5.
5. Check for Air in the Fuel System
A. Check for air in the fuel. Refer to Systems Operation, Testing and Adjusting, "Air in Fuel - Test" for the proper procedure
Air in the System
Result: Air is in the system.
Repair: Refer to Systems Operation, Testing and Adjusting, "Air in Fuel - Test" for the proper repairs.
Result: Air is not in the system.
Proceed to Test Step 6.
Illustration 1 g06404740
(1) Secondary fuel filter outlet pressure sensor
Table 3
Engine RPM Fuel pressure from the electronic service tool Fuel pressure from the mechanical gauge
800
1800
Table 4
Troubleshooting Test Steps Values Results
6. Check the Fuel Pressure Sensor
A. Record the fuel pressure from the electronic service tool. Record the value in Table 3.
B. Remove the fuel pressure sensor .
C. Install a suitable pressure gauge into the low-pressure fuel system with a tee fitting into the port of the pressure sensor.
D. Connect the fuel pressure sensor to the tee fitting.
E. Record the fuel pressure from the electronic service tool and on the pressure gauge. Record the data in Table 3.
Pressure Sensor
Result: The gauge value of the fuel pressure is within 69 kPa (10 psi) of the fuel pressure reading shown in the electronic service tool.
Proceed to Test Step 7.
Result: The gauge value of the fuel pressure is not within 69 kPa (10 psi) of the fuel pressure reading shown in the electronic service tool.
Repair: Replace the pressure sensor. Verify that the problem has been resolved.
If the problem is not resolved, proceed to Test Step 7.
7. Replace the Transfer Pump
A. Replace the transfer pump.
For information about testing the transfer pump, Refer to Systems Operation, Testing and Adjusting, "Fuel System Pressure - Test".
Transfer Pump
Result: The transfer pump was replaced.
Repair: Reset all active codes and clear all logged codes by using the electronic service tool.
Verify that the problem has been resolved.