Symptom Tree t064
| 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 QSX15 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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Idle shutdown or PTO shutdown features are activated |
Check the time limit on idle and PTO shutdowns with an electronic service tool. Refer to the electronic service tool manual. |
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Engine will not restart |
Refer to the Engine Performance TT tree in this manual. |
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Engine protection fault code(s) inactive |
View the fault codes and the engine protection data with an electronic service tool. Refer to the appropriate electronic service tool manual. Refer to the corresponding fault code in Section TF 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 QSX15 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 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 019-064in the Troubleshooting and Repair Manual Electronic Control System, Signature, ISX and QSX15 Engines, Bulletin 3666259. |
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Fuel inlet restriction |
Check for fuel inlet restriction. Refer to Procedure 006-020. |
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Air in fuel system |
Bleed the fuel system and correct source of the leak. Refer to Procedure 006-003. |
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Engine brakes are malfunctioning |
Check the engine brake operation, adjustment, and solenoid resistance. Repair or adjust as necessary. Refer to Procedure 020-004. |
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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. |
