Table 72
Troubleshooting Test Steps
Values Results
1. Diagnostic Codes
A. Establish communication between the electronic service tool
and the Electronic Control Module (ECM). Refer to Troubleshoot-
ing, “Electronic Service Tools”, if necessary.
B. Use the electronic service tool to check for active or logged
codes.
Codes Result: There are active codes.
Repair: Troubleshoot any active codes before continuing
with this procedure.
Result: There are no active codes.
Proceed to Test Step 2.
2. Fuel Supply
A. Visually check the fuel tank for fuel. The fuel gauge may be
faulty.
B. Ensure that the vent in the fuel cap is not filled with debris.
C. Ensure that the fuel supply valve (if equipped) is in the full
OPEN position.
D. Check the primary filter/water separator for water in the fuel.
E. Check for fuel supply lines that are restricted.
F. Check that the Electric Fuel Lift Pump (EFLP) is operating. If the
EFLP is suspect, refer to Troubleshooting, “Relay - Test (Electric
Fuel Lift Pump)”.
G. Check for air in the fuel system. Refer to Systems Operation,
Testing, and Adjusting, “Air in Fuel - Test”.
H. Obtain a fuel analysis to confirm that the correct fuel is being
used. Refer to Systems Operation/Testing and Adjusting, “Fuel
Quality - Test” for the correct procedure.
Fuel supply Result: There is air in the fuel system.
Repair: Prime the fuel system. Refer to Systems Opera-
tion, Testing, and Adjusting, “Fuel System - Prime”.
Result: The fuel quality is not OK.
Repair: Replace the fuel. Replace the in line fuel filter that
is upstream of the EFLP. Replace the primary and secon-
dary fuel filters. Verify that the repair eliminated the fault.
Result: The fuel quality is OK.
Proceed to Test Step 3.
148 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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