Operation and maintenance manual

Troubleshooting Symptoms Charts QSB4.5 and QSB6.7
Page TS-32 Section TS - Troubleshooting Symptoms
Engine Shuts Off Unexpectedly or Dies During Deceleration
Cause Correction
STEP 1
Engine will not restart
.............
Refer to the Engine Difficult to Start or Will Not
Start symptom tree.
OK
Go To Next Step
STEP 2
Fuel level is low in the tank
.............
Fill the supply tank. Refer to the OEM service
manual.
OK
Go To Next Step
STEP 3
Electronic fault codes are active
.............
For instructions on how to read active fault codes,
refer to Section 1. If fault codes are active, contact
a Cummins Authorized Repair Facility.
OK
Go To Next Step
STEP 4
Idle shutdown or PTO shutdown features are
activated
.............
Check the time limit on idle and PTO shutdowns
with an electronic service tool. Refer to Electronic
Controlled Fuel System in Section 1.
OK
Go To Next Step
STEP 5
Moisture in the wiring harness connectors
.............
Dry the connectors with Cummins electronic
cleaner, Part Number 3824510.
OK
Go To Next Step
STEP 6
OEM engine protection system is malfunctioning
.............
Isolate the OEM engine protection system. Follow
the OEM service manuals to check for a
malfunction.
OK
Go To Next Step
STEP 7
Battery voltage supply to the electronic control
module (ECM) is low, interrupted, or open
.............
Check the battery connections, the fuses, and the
unswitched battery supply circuit. Refer to the
OEM service manual.
OK
Go To Next Step
STEP 8
Air in the fuel system
.............
Check for air in the fuel system. Tighten or replace
the fuel connections, fuel lines, fuel tank
standpipe, and fuel filters as necessary. Refer to
Section 5.
OK
Go To Next Step
STEP 9
Contact a Cummins® Authorized Repair Facility