Symptom Tree t044
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This is symptom tree t044
Electronic fault codes active or high counts of inactive fault codes |
Refer to Section TF for fault code troubleshooting. |
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Fuel level is low in the tank |
Fill the supply tank. Refer to the OEM service manual. |
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Keyswitch circuit is malfunctioning |
Check the vehicle, equipment, or vessel keyswitch circuit. Refer to Procedure 019-064. |
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Starter solenoid lockout relay driver circuit malfunctioning |
Check the vehicle starter solenoid lockout relay driver circuit. Refer to the respective OEM manual. |
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Battery voltage is low |
Check the batteries and the unswitched battery supply circuit. Refer to Procedures 019-087, 013-009 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139, and the OEM service manual. |
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Electronic control module (ECM) is locked up |
Disconnect the battery cables for 30 seconds. Connect the battery cables, and start the engine. Refer to Procedure 013-009 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Electronic control module (ECM) or J1587 or J1922 datalink connectors have moisture in them |
Dry the connectors with electronic parts cleaner, Part Number 3824510. |
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Fuel pump is malfunctioning |
Check the fuel pump output pressure, pulsation damper, and pressure regulator. Replace the fuel pump if necessary. Refer to Procedures 005-011, 005-016, and 005-031 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Fuel shutoff valve(s) closed (electronic fuel system) |
Check the fuel shutoff valve and circuit. Refer to Procedures 019-049 and 019-050. |
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Engine position sensor (EPS) or circuit is malfunctioning |
Check the engine position sensor and circuit. Refer to Procedures 019-038 and 019-039. |
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Electronic control module (ECM) calibration is malfunctioning |
Verify the ECM calibration is correct. Check the calibration revision history for applicable fixes to the calibration stored in the ECM. Refer to the calibration history spreadsheet Click here to see ecm_calibration_rev_history.xls
on QuickServe® Online or the INCAL™ CD-ROM. Compare the calibration stored in the ECM with the engine rating and Control Parts List (CPL), Bulletin 4021326 or 4021327. If necessary, recalibrate the ECM. Refer to the appropriate electronic service tool manual and Procedure 019-032. |
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Fuel inlet restriction |
Check for fuel inlet restriction. Refer to Procedure 006-020 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Air in the fuel system |
Check for air in the fuel system. Refer to Procedure 006-003 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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In-line check valve(s) is installed backward or has an incorrect part number |
Check the in-line check valve(s) for the correct part number. Check the arrow on the check valve(s) for the correct orientation. Refer to the OEM service manual. |
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Fuel drain line restriction |
Check the fuel drain lines for restriction. Clear or replace the fuel lines, check valves, or tank vents as necessary. Refer to Procedure 006-012 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Electronic control module (ECM) is malfunctioning |
Replace the ECM. Refer to Procedure 019-031. |
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Injector o-rings are damaged or missing |
Remove and check the injectors. Replace the injector o-rings. Refer to Procedure 006-026 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Injectors are malfunctioning |
Perform a road test or dynamometer test. Use the data to determine if the engine is overfueled. Replace injectors as necessary. Refer to Procedure 006-005 or 006-026 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Fuel supply line restriction between the fuel pump and the injectors |
Check the fuel supply line from the fuel pump to the cylinder head for sharp bends that can cause restrictions. Refer to Procedure 006-024 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Fuel drillings in the cylinder head are plugged |
Check for a plastic fuel passage plug blocking the fuel supply to the injectors. Refer to Procedure 002-004 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Camshaft end clearance is excessive |
Check the camshaft end clearance. Refer to Procedure 001-008 or 001-065 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Camshaft is broken |
Check the rocker lever movement while rotating the crankshaft. Refer to Procedure 003-004 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Internal engine damage |
Analyze the oil and inspect the filters to locate an area of probable damage. Refer to Procedure 007-002 in the Troubleshooting and Repair Manual N14 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666142, or the Troubleshooting and Repair Manual M11 Series Engines (STC, CELECT™, CELECT™ Plus Models), Bulletin 3666139. |
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Last Modified: 16-Jan-2004