3512E Tier 4 Final Engines for Land Electric Drilling Caterpillar

Clean Fuel Module - Test

Usage:

Use this procedure to troubleshoot a problem with clean fuel module. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.

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Table 1
J1939 Code and Description	CDL Code and Description	Comments
1381-17 Engine Fuel Supply Pump Inlet Pressure : Low - least severe (1)	E2172 (1) Engine Fuel Supply Pump Inlet Pressure : Low - least severe (1)	The fuel transfer pump inlet pressure is too low.
1381-18 Engine Fuel Supply Pump Inlet Pressure : Low - moderate severity (2)	E2172 (2) Engine Fuel Supply Pump Inlet Pressure : Low - moderate severity (2)	The fuel transfer pump inlet pressure is too low.
5417-0 Fuel Filter (Suction Side) Intake Pressure : High - most severe (3)	E1569 (3) Low Electric Fuel Transfer Pump Outlet Pressure	The Clean Fuel Module (CFM) electric lift pump is not working properly.
5417-17 Fuel Filter (Suction Side) Intake Pressure : Low - least severe (1)	E1569 (1) Low Electric Fuel Transfer Pump Outlet Pressure	The CFM electric lift pump is not working properly.
5417-18 Fuel Filter (Suction Side) Intake Pressure : Low - moderate severity (2)	E1569 (2) Low Electric Fuel Transfer Pump Outlet Pressure	The CFM electric lift pump is not working properly.

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Table 2
Associated Codes
J1939 Codes	CDL Codes	Troubleshooting Procedure
931-5	1627-5	Troubleshooting, "Fuel Priming Pump - Test"
931-6	1627-6	Troubleshooting, "Fuel Priming Pump - Test"
7102-5	4550-5	Troubleshooting, "Fuel Priming Pump - Test"
7102-6	4550-6	Troubleshooting, "Fuel Priming Pump - Test"
1382-16	E1129	Troubleshooting, "Fuel Filter Is Restricted"

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Illustration 1	g03743610
(1) Clean Fuel Module (CFM) pump (2) Fuel transfer pump (3) High-pressure fuel pump (4) Tank

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Table 3
Component	Electrical Checkout
Engine Fuel Supply Pump Actuator	Fuel Pump Relay Command Override
Engine Fuel Filter Circulating Pump (CFM)	Electric Fuel Transfer Pump Relay Override

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Table 4
Troubleshooting Test Steps	Values	Results
1. Check the Fuel System for Leaks A. Inspect the fuel system components for restrictions: - Lines - Tank - Transfer pump B. Refer to Testing and Adjusting, "Fuel System Inspection" for additional information.	Leaks	Result: No leaks were found. Proceed to Test Step 2. Result: Leaks were found in the fuel system. Repair: Repair the leaks. Verify that the problem is resolved.
2. Check for Codes A. Connect Cat^® Electronic Technician (ET) to the service tool connector. B. Check for an active associated code.	Codes	Result: An associated code is active. Repair: Troubleshoot any associated codes before continuing with this test. Result: An associated code not is active. Proceed to Test Step 3.
3. Check for Codes A. Connect Cat ET. B. Check for active event codes.	Codes	Result: An E1569, 1381, or 5417 code is active. Proceed to Test Step 4. Result: Both an E1569 or 5417 and an E2172 or 1381 are active. Proceed to Test Step 4. Result: An E2172 or 1381 is active. Proceed to Test Step 9.
4. Check for Supply Voltage at the Clean Fuel Module Pump (CFM) Connector A. Turn the keyswitch to the OFF position. B. Disconnect the wiring harness from the CFM pump. C. Connect Cat ET. D. Use Cat ET to perform the following override: -"Electric Fuel Transfer Pump Relay Override" E. Measure the voltage between the following pins on the CFM pump connector: - Pin 2 and Pin 3 - Pin 2 and Pin 4	Voltage	Result: The voltage at the clean fuel pump module connector is equal to system voltage. Proceed to Test Step 5. Result: The voltage at the clean fuel pump module connector is not equal to system voltage. Repair: There is a problem with the power supply circuit between the CFM pump connector and the battery supply. Check the circuit protection device, clean fuel module (CFM) relay, and the ground for the clean fuel module pump circuit. Refer to the appropriate wiring diagram to troubleshoot the circuit.
5. Inspect the Fuel Lines A. Visually inspect the fuel lines between the fuel tank and the inlet to the clean fuel module. Refer to Systems Operation/Testing and Adjusting, "Fuel System Inspection" for additional information. B. Inspect the fuel lines for the following: -Restrictions -Pinching -Swelling C. Check for plugged fuel tank vent lines or a plugged fuel tank suction screen.	Fuel Lines	Result: The fuel lines, tank vent, and suction screen are OK. Proceed to Test Step 6. Result: The fuel lines, tank vent, and suction screen are NOT OK. Repair: Repair or replace the damaged fuel lines. Verify that the problem has been resolved.
6. Prime the Fuel System A. Remove the air in the fuel system by performing a priming cycle. B. Refer to the Operation and Maintenance Manual for additional information.	Priming	Result: The fuel system is primed. Proceed to Test Step 7.
7. Check the CFM Pump Pressure A. Turn the keyswitch to the OFF position. B. Remove the CFM outlet pressure sensor. C. Connect a fuel pressure gauge to the port where the sensor was removed from the CFM. D. Turn the keyswitch to the ON position. E. Connect Cat ET. F. Use Cat ET to perform the following override: -"Electric Fuel Transfer Pump Relay Override" G. Monitor the fuel pressure on the gauge.	30 kpa - 150 kpa (4 PSI - 21.5 PSI)	Result: The CFM pump pressure is within specification. Proceed to Test Step 8. Result: The CFM pump pressure is not within specification. Repair: A failed clean fuel module pump has been detected. Replace the CFM pump. Proceed to Test Step 12.
8. Check for Proper Operation of the CFM Pump A. Connect Cat ET. B. Start the engine. C. Allow the engine to run for at least 10 minutes. D. Use Cat ET to monitor the following parameter in the status screen: - "Fuel Temperature" Note: The "Fuel Temperature" must be greater than 15° C (59° F). E. Check for codes. Note: Enablement conditions for this fault code require at least 10 minutes of engine run time, and fuel temperature must be greater than 15° C (59° F).	Codes	Result: A is not code active. Return to service. Result: An E1569 or 5417 code is active. Refer to Troubleshooting, "Fuel Pressure Is Low - Fuel Transfer System" for additional information.
9. Prime the Fuel System A. Remove the air in the fuel system by performing a priming cycle. B. Refer to the Operation and Maintenance Manual for additional information.	Priming	Result: The fuel system is primed. Proceed to Test Step 10.
10. Inspect the Fuel Lines A. Visually inspect the fuel lines between the fuel tank and the inlet to the clean fuel module. Refer to Systems Operation/Testing and Adjusting, "Fuel System Inspection" for additional information. B. Inspect the fuel lines for the following: -Restrictions -Pinching -Swelling C. Check for plugged fuel tank vent lines or a plugged fuel tank suction screen.	Fuel Lines	Result: The fuel lines are OK. Proceed to Test Step 11. Result: The fuel lines are NOT t OK. Repair: Replace damaged fuel lines. Verify that the problem has been resolved.
11. Check the Fuel Pressure at the Fuel Transfer Pump A. Start the engine. B. Run the engine until normal operating temperature has been reached. C. Bring the engine to high idle. D. Connect Cat ET. E. Use Cat ET to monitor the following pressure: -"Fuel Transfer Pump Intake Pressure"	Pressure	Result: The fuel pressure is greater than 0 PSI. Proceed to Test Step 12. Result: The fuel pressure is less than 0 PSI. Repair: A failed CFM pump has been detected. Replace the CFM pump. Proceed to Test Step 12.
12. Check for Proper Operation of the Fuel System A. Connect Cat ET. B. Start the engine. C. Allow the engine to run for at least 5 minutes. D. Check for active diagnostic codes.	Codes	Result: A code is not active. Return 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).