HARNESS AS-WIRING 2856651 - Caterpillar

Table 1
Event Code    
Description    Conditions which Generate this Code    System Response    
E2172(1) Low Fuel Transfer Pump Inlet Pressure     The gauge pressure (vacuum) of the fuel at the inlet of the fuel transfer pump drops below -50 kPa (-7 psi) for the programmed delay time.     The code is logged.    Probable Causes
Fuel level
Primary fuel filter/water separator
Fuel linesRecommended Actions
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.
   
E2172
   
Result: An associated code is present.
Repair: Troubleshoot any associated codes before continuing with this test.
Result: An E2172 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 Lines for Damage and Restriction
    Lines    
Result: The fuel lines are OK.
Proceed to the next step.
Result: The fuel lines are NOT OK.
Repair: Clear restrictions and replace any damaged lines.
   
3. 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 E2172 is present.
Proceed to the next step.
Result: A code other than E2172 is present.
Refer to the appropriate troubleshooting story.
   
4. Inspect the Fuel Lines for Damage and Restriction
   
Lines
   
Result: The fuel lines are OK.
Contact your TC for assistance.
Result: The fuel lines are NOT OK.
Repair: Clear restrictions and replace any damaged lines.