Symptom Tree t038
| 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 Troubleshooting and Repair Manual, Electronic Control System, Signature, ISX and QSX15 Engines, Bulletin 3666259, or Section TF in the Troubleshooting and Repair Manual, Power Generation Control Systems QSX15, QSK23, QSK45, QSK60, QSK78, and QST30 Series Engines, Bulletin 4021419 for fault code troubleshooting. |
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Engine brake enable circuit is malfunctioning |
Check the engine brake enable circuit. Refer to Procedure 019-034 in the Troubleshooting and Repair Manual, CM870 Electronic Control System, Signature and ISX Engines, Bulletin 4021334, or Procedure 019-034 in the Troubleshooting and Repair Manual, Electronic Control System, Signature, ISX and QSX15 Engines, Bulletin 3666259. |
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Engine brake on/off switch or circuit is malfunctioning |
Check the engine brake on/off switch and circuit. Refer to Procedures 019-034 and 019-035 in the Troubleshooting and Repair Manual, CM870 Electronic Control System, Signature and ISX Engines, Bulletin 4021334, or Procedures 019-034 and 019-035 in the Troubleshooting and Repair Manual, Electronic Control System, Signature, ISX and QSX15 Engines, Bulletin 3666259. |
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Engine brake adjustment is not correct |
Adjust the engine brakes. Refer to Procedure 020-004. |
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Solenoid valve o-ring seals are leaking |
Remove the solenoid valve and inspect the top and bottom o-rings. Replace the o-rings if necessary. Procedure 020-004 |
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Solenoid valve is malfunctioning |
Check for voltage at the solenoid valve. Refer to Procedure 020-012. |
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Solenoid valve is stuck in the on position |
Replace the solenoid valve. Refer to Procedure 020-012. |
