Symptom Tree
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Electronic fault codes are active |
For instructions on how to read active fault codes, refer to Procedure 101-007 (Electronic Controlled Fuel System) in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility. |
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Battery voltage is low |
Check the batteries and the unswitched battery supply circuit. Refer to the OEM service manual. |
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Engine-driven units are engaged |
Disengage engine-driven units. |
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Engine cranking speed is too slow |
If the cranking speed is slower than 150 rpm, refer to the Engine Will Not Crank or Cranks Slowly symptom tree. |
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Fuel shutoff valve(s) closed (electronically controlled injection) |
Check the fuel shutoff valve and circuit. Contact a Cummins Authorized Repair Facility. |
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Fuse(s) malfunctioning |
Replace the fuse(s) in the OEM interface harness. |
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Exhaust system restriction |
Check the exhaust system for any restrictions. Refer to Procedure 018-020 (Exhaust System Specifications) in Section V. |
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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 Procedure 018-002 (Fuel Recommendations and Specifications) in Section V. |
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Starting aid is necessary for cold weather or starting aid is malfunctioning |
Check for the correct operation of the starting aid. Refer to the manufacturer’s instructions. Refer to Procedure 101-015 (Operating the Engine) in Section 1. |
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Fuel filter or fuel suction line is restricted |
Replace the fuel filter. Refer to Procedure 006-015 (Fuel Filter – Spin-on) in Section 4. Check the fuel suction line for restriction Procedure 006-015 (Fuel Filter – Spin-on) in Section 4. |
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Air intake system restriction is above specification |
Check the air intake system for restriction. Clean or replace the air filter and inlet piping as necessary. Refer to Procedure 010-024 (Air Leaks, Air Intake and Exhaust Systems) in Section 5. |
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| Contact a Cummins Authorized Repair Facility |
