Symptom Tree t072
| Cause | Correction |
|---|
|
Electronic fault codes active or high counts of inactive fault codes |
Read the fault codes with an electronic service tool. Refer to Section TF for fault code troubleshooting. |
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|
Idle shutdown or PTO shutdown features are activated |
Turn OFF the keyswitch for 5 seconds. Turn ON the keyswitch and check fault lamp operation. |
|
|
Fuel level is low in the tank |
Fill the supply tank. Refer to the OEM manual. |
|
|
Battery voltage is low |
Check the batteries and the unswitched battery supply circuit. Refer to Procedure 013-009 in the Troubleshooting and Repair Manual, Signature, ISX and QSX15 Engines, Bulletin 3666239 and 019-087. |
|
|
Fuel inlet restriction |
Check for fuel inlet restriction. Refer to Procedure 006-020 in the Troubleshooting and Repair Manual, Signature, ISX and QSX15 Engines, Bulletin 3666239. |
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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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|
Fuel grade is not correct for the application or the fuel quality is poor |
Operate the engine from a tank of high-quality fuel. Refer to Fuel Recommendations and Specifications in the Operation and Maintenance Manual, Bulletin 3666251. |
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|
Vehicle parasitics are excessive |
Check for transmission malfunctioning, cooling fan operation cycle time, and engine-driven units. Refer to the OEM service manual. |
