Symptom Tree t081
| Cause | Correction |
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Electronic fault codes active or high counts of inactive fault codes |
Refer to Section TF in the Troubleshooting and Repair Manual, CM870 Electronic Control System, Signature and ISX Engines, Bulletin 4021334, or the Troubleshooting and Repair Manual, Electronic Control System, Signature, ISX and QSX Engines, Bulletin 3666259, or the Troubleshooting and Repair Manual, Power Generation Control Systems QSX15, QSK23, QSK45, QSK60, QSK78, and QST30 Series Engines, Bulletin 4021419. |
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Keyswitch circuit is malfunctioning |
Check the vehicle, equipment, or vessel keyswitch circuit. Refer to Procedure 019-064 in the Troubleshooting and Repair Manual, CM870 Electronic Control System, Signature and ISX Engines, Bulletin 4021334, or Procedure 019-064 in the Troubleshooting and Repair Manual, Electronic Control System, Signature, ISX and QSX Engines, Bulletin 3666259. |
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Fuel shutoff valve (FSOV) solenoid or circuit is malfunctioning (electronically controlled fuel systems) |
Check the fuel shutoff valve solenoid and circuit. |
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Injector is malfunctioning |
Perform the automated cylinder performance test. Replace injectors as necessary. Refer to Procedure 006-026. |
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Engine is running on fumes drawn into the air intake |
Check the air intake ducts. Locate and isolate the source of the fumes. Repair as necessary. Refer to the OEM service manual. |
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Turbocharger oil seal is leaking |
Check the turbocharger compressor and turbine seals. Refer to Procedure 010-033. |
