0317218 JOHNSON COVER, Cylinder head

Table 1
Event Code
CDL Code Code Description Comments
E198 (1) Low Fuel Pressure The code is logged.
E198 (2) The engine power is derated. The code is logged.
The ECM will illuminate the action lamp.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat ET to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Determine if a diagnostic trouble code is present.
Codes
Result: A E198 code is present.
Proceed to test Step 2.
Result: A code other than a E198 code is present.
Repair: Troubleshoot the code. Refer to the proper troubleshooting procedure. Low fuel pressures may cause high fuel temperatures. Troubleshoot a code for low fuel pressure before troubleshooting a code for high fuel temperature.
STOP
2. Check the Fuel Level in the Tank
A. Remove the fuel tank cap from the fuel tank. Check the vent port that is in the cap for debris. Clear any restrictions with compressed air.
B. Visually inspect the fuel level in the fuel tank. Ensure that the fuel tank contains enough fuel in order to operate the engine.
C. 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.
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.
Note: 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.
Leaks
Result: No leaks were found.
Proceed to Test Step 4.
Result: Leaks were found in the fuel system.
If the problem is not resolved, proceed to Test Step 4.
Table 3
Required Tooling
8T-7860 Connector
110-6349 Fitting as
8T-0855 Pressure Gauge
6V-3990 Coupler
Illustration 1 g02023390
(1) Fuel temperature sensor
(2) Fuel sampling port
(3) Fuel pressure sensor
(4) Fuel filter baseNote: Do not use the fuel sampling port (2) for measuring the pressure. Follow the steps below.
Table 4
Engine RPM Fuel pressure from Cat ET Fuel pressure from the mechanical gauge
800
1800
Table 5
Troubleshooting Test Steps Values Results
4. Check the Fuel Pressure Sensor
A. Record the fuel pressure from Cat ET. Record the data in Table 4.
B. Remove the fuel pressure sensor (3).
C. Install a 8T-7860 Connector into the port of the pressure sensor (3).
D. Install the 110-6349 Fitting as onto the 8T-7860 Connector.
E. Install a 8T-0855 Pressure Gauge onto a 6V-3990 Coupler.
F. Install the 6V-3990 Coupler onto the 110-6349 Fitting as.
G. Record the fuel pressure on the pressure gauge. Record the data in Table 4.
Fuel Pressure Sensor
Result: The gauge value of the fuel pressure is within 137 kPa (20 psi) of the fuel pressure reading shown in ET.
Proceed to Test Step 5.
Result: The gauge value of the fuel pressure is not within 137 kPa (20 psi) of the fuel pressure reading shown in ET.
Repair: Replace the fuel pressure sensor.
If the problem is not resolved, proceed to Test Step 5.
Verify that the recorded fuel pressure is above the minimum acceptable fuel specifications. Refer to Table 6 for the minimum acceptable specifications.
Table 6
Engine RPM Minimum acceptable fuel pressure
800 360 kPa (52 psi)
1800 450 kPa (65 psi)
Table 7
Troubleshooting Test Steps Values Results
5. Verify that the Fuel Pressure Is Within Specifications
Fuel Pressure
Result: The fuel pressure is above the minimum acceptable fuel specifications.
Proceed to Test Step 7.
Result: The fuel pressure is not above the minimum acceptable fuel specifications.
Proceed to Test Step 6.
6. Replace the Fuel Filters
A. Replace the primary filter, the secondary filter, and the tertiary fuel filters.
Note: The fuel system will need to be primed after the filters are replaced.
B. Verify that the fuel pressure is above the minimum acceptable pressure specifications. Refer to Table 6 for the proper specifications.
Fuel Filters
Result: The fuel pressure meets the minimum acceptable fuel pressure specifications.
Return the engine to service.
STOP
Result: The fuel pressure does not meet the minimum acceptable fuel pressure specifications.
Proceed to Test Step 7.
7. Check for Air in the Fuel System
A. Ch