(Table 96, contd)
Troubleshooting Test Steps
Values Results
4. Fuel Filters
A. Replace the in-line fuel filter that is upstream of the electric fuel
lift pump (if equipped). Refer to the Operation and Maintenance
Manual for further information. If an in-line fuel filter is not in-
stalled, replace the fuel strainer on the fuel tank pickup pipe. Refer
to the documentation for the machine.
B. Replace the primary fuel filter and the secondary fuel filters.
Refer to the Operation and Maintenance Manual for further
information.
C. If equipped, check the Fuel Tank Breather and replace if
necessary.
Fuel filters Result: The filters have been replaced and the fault is
eliminated.
Return the unit to service.
Result: The filters have been replaced and the fault is
still present.
Proceed to Test Step 5.
5. Fuel Rail Pressure Sensor
A. Make sure that the engine has been stopped for at least 10 mi-
nutes. Use the electronic service tool to check the status of the
“Fuel Rail Pressure” .
Pressure sensor Result: The “Fuel Rail Pressure (absolute)” is more
than 5,000 kPa (725 psi).
Repair: Test the fuel rail pressure sensor. Refer to Trou-
bleshooting, “Sensor Signal (analog, Active) - Test”.
Use the electronic service tool to perform the "Fuel Rail
Pressure Test". If the test fails, replace the fuel pressure
sensor. Refer to Disassembly and Assembly, “Fuel
Pressure Sensor - Remove and Install”.
Confirm that the fault has been eliminated.
Result: The “Fuel Rail Pressure (absolute)” is less than
5,000 kPa (725 psi).
For a high fuel rail pressure symptom, proceed to Test
Step 6.
For a low fuel rail pressure symptom, proceed to Test
Step 11.
6. High-Pressure Fuel Pump Calibration
A. Use the electronic service tool to perform the “High Pressure
Fuel Pump Calibration” .
Fuel system Result: Fuel rail pressure is normal after performing the
“High Pressure Fuel Pump Calibration” .
Use the electronic service tool to perform the “Fuel Rail
Pressure Test” . If the “Fuel Rail Pressure Test” is suc-
cessful, return the unit to service.
If the “Fuel Rail Pressure Test” generates additional di-
agnostic codes, troubleshoot the additional codes. Re-
fer to Troubleshooting, Diagnostic Trouble Codes or
Troubleshooting, Event Codes.
Result: Fuel rail pressure is still high after performing
the “High Pressure Fuel Pump Calibration” .
Run the engine for a minimum of 30 minutes.
Proceed to Test Step 7.
194 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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