Troubleshooting

(Table 30, contd)
Troubleshooting Test Steps
Values Results
3. Electrical Connectors
A. Check for the correct installation of the ECM J1/P1 and the
J2/P2 connectors. Check for correct installation of the fuel injec-
tor connectors.
Connectors Result: There are suspect connectors.
Repair: Repair connectors that are suspect or replace con-
nectors that are suspect.
Result: There are no suspect connectors.
Proceed to Test Step 4.
4. Fuel System Inspection
A. Check that the fuel shut-off valve is in the OPEN position.
B. If the temperature is below 0 °C (32 °F), check for solidified
fuel (wax).
C. Check for fuel supply lines that are restricted.
D. Check that the low-pressure fuel lines are correctly installed.
E. Check the pressures in the fuel system. Refer to Systems Op-
eration, Testing, and Adjusting, “Fuel System Pressure - Test”
F. Check the diesel fuel for contamination. Refer to Systems Op-
eration, Testing, and Adjusting, “Fuel Quality - Test”.
G. Check for air in the fuel system. Refer to Systems Operation,
Testing, and Adjusting, “Air in Fuel - Test”.
H. Ensure that the fuel system has been primed. Refer to Sys-
tems Operation, Testing, and Adjusting, “Fuel System - Prime”.
Fuel System Result: A defect was found in the fuel system.
Repair: Make any necessary repairs.
Result: No defects found.
Proceed to Test Step 5.
5. Switches
A. Check the keyswitch input to the ECM.
B. Check any engine shutdown switches and associated wiring.
Switches Result: The shutdown switches and wiring are not OK.
Repair: Make the necessary repairs, Verify that the repair
eliminated the fault.
Result: The shutdown switches and wiring are OK.
Contact the Dealer Solution Network (DSN).
i06225009
Engine Stalls at Low RPM
Probable Causes
• Diagnostic codes
• Accessory equipment
• Fuel system inspection
• Low compression (cylinder pressure)
• Electronic unit injectors
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
UENR0612-07
75
Symptom Troubleshooting
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