Symptom Tree t074-010
Cause | Correction |
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Batteries are cold |
Check the battery heater. Refer to the OEM service manual. |
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Electronic fault codes active or high counts of inactive fault codes |
Read the fault codes with an electronic service tool. Refer to Section TF in Troubleshooting and Repair Manual, ISB, ISBe2, ISBe3, ISBe4, QSB4.5, QSB5.9, QSB6.7, ISC, QSC8.3, ISL, ISLe3, ISLe4, and QSL9, CM850 Electronic Control System, Bulletin |
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Battery voltage is low |
Check the batteries and the unswitched battery supply circuit. Refer to Procedure 013-007 in Section 13. |
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Broken, loose, or corroded starting circuit connections |
Inspect, clean, and tighten both the positive and negative connections between the starting motor and battery, including the magnetic switch. Refer to Procedure 013-009 in Section 13. |
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Battery capacity is below specification |
Refer to Procedure 013-007 in Section 13. Replace the batteries if necessary. |
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OEM starter interlock devices engaged |
Check the starter interlock devices. Refer to the OEM service manual. |
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Lubricating oil pressure switch, gauge, or sensor is malfunctioning or is not in the correct location |
Check the oil pressure switch, gauge, or sensor for correct operation and location. Refer to the OEM service manual. |
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Battery cables are not the correct gauge or length |
Replace the battery cables with larger gauge or shorter length cables. Refer to the OEM service manual. |
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Engine-driven units are engaged |
Disengage engine-driven units. |
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Starting circuit component is malfunctioning |
Check the starting circuit components. Refer to the OEM service manual. |
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Starter motor malfunction |
Check the voltage drop at the starting motor. Refer to Procedure 013-020 in Section 13. |
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Starting motor pinion or ring gear is damaged |
Remove the starting motor, and inspect the gear. Refer to Procedure 013-020 in Section 13. |
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Lubricating oil level is above specification |
Check the oil level. Verify the dipstick calibration and oil pan capacity. Fill the system to the specified level. Refer to Procedure 007-009 in Section 7. |
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Lubricating oil does not meet specifications for operating conditions |
Change the oil and filters. Refer to Procedure 018-003 in Section V. This procedure can be found in the appropriate Operation and Maintenance Manual, to verify the correct lubricating oil is being used. |
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Crankshaft rotation is impaired |
Check the crankshaft for ease of rotation. Refer to Procedure 001-016 in Section 1. |
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Internal engine damage |
Analyze the oil and inspect the filters to locate an area of probable damage. Refer to Procedure 007-083 in Section 7. |