FILM (Instruction) 6V0888 - Caterpillar

Table 1
Event Codes    
CDL Code and Description    Conditions which Generate this Code    System Response    
E198(1) Low Fuel Pressure     The fuel pressure in the low-pressure system is below the trip point for the programmed delay time.     The code is logged.    
E198(2) Low Fuel Pressure     The code is logged.
The engine power is derated.
E198(3) Low Fuel Pressure    Probable Causes
Diagnostic codes and event codes
Fuel level
Vent port at the fuel tank
Fuel pressure sensors
Fuel pressure regulating valve
Fuel priming pump
Fuel transfer pumpRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Check for Codes
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Product Status Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Determine if the diagnostic trouble code that directed to this procedure is present.
D. Look for active diagnostic codes that are associated with the system for the event code that directed to this procedure.
   
E198
   
Result: An associated code is present.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: An E198 is present.
Proceed to the next step.
Result: No active codes
STOP
   
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 in order 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 the next step.
Result: The fuel level is not OK.
Fill the tank. Verify that the problem has been resolved.
If the problem is not resolved, proceed to the next step.
   
3. Inspect the Fuel Tank Vent Port for Debris
   
Vent
   
Result: The fuel tank vent is not plugged.
Proceed to the next step.
Result: The fuel tank vent is plugged.
Repair: Clear any restrictions with compressed air.
Do not allow debris to enter the fuel tank while you clean the cap. Damage to the fuel system will occur.
If the problem is not resolved, proceed to the next step.
   
4. Verify the Fuel System Is Primed
A. Drain the water from the primary filters. Refer to Operation and Maintenance Manual, "Fuel System Primary Filter (Water Separator) - Drain".
B. Verify that the fuel system is properly primed. Refer to Operation and Maintenance Manual, "Fuel System - Prime".
C. Start the engine and allow it to operate for 1 minute.
D. Check for codes.
   
Codes
   
Result: An E198 is present.
Proceed to the next step.
Result: A code other than E198 is present.
Refer to the appropriate troubleshooting story.
   
5. Check the Fuel Pressure Sensors
A. Start the engine. Run the engine at low idle. Use Cat ET to monitor the values for the following parameters:
- "Fuel Transfer Pump Inlet Pressure (absolute)"
- "Unfiltered Fuel Pressure (absolute)"
- "Fuel Pressure (absolute)"
B. Check the value of each parameter while the engine is at low idle. Ensure that the value for each