(Table 68, contd)
Troubleshooting Test Steps
Values Results
9. High-Pressure Fuel System
A. Use the electronic service tool to check the absolute fuel rail
pressure while the engine is cranking at a minimum speed of
150 rpm.
High-pressure
fuel system
Result: The absolute fuel rail pressure is less than 25 MPa
(3625 psi).
Repair: Check for fuel leaks in the high-pressure fuel sys-
tem. Rectify any fuel leaks and then recheck the pressure
in the fuel rail.
Use the electronic service tool to perform a solenoid test on
the fuel injection pump. Refer to Troubleshooting, “Solenoid
Valve - Test”.
Check the Pressure Limiting Valve (PLV) in the fuel rail for
leakage. If the valve is leaking, replace the valve and re-
check the pressure in the fuel rail.
Check for fuel in the engine oil system. If fuel is suspected
in the oil system, take an engine oil sample for analysis.
Refer to the Operation and Maintenance Manual, “Engine
Oil Sample - Obtain”.
If the analysis confirms that there is fuel in the engine oil
system, investigate the cause.
Result: The absolute fuel rail pressure is greater than
25 MPa (3625 psi).
Repair: Use the electronic service tool to make sure that
the status of the electronic unit injectors is not “Disabled” .
If the injectors are disabled but the injectors have not been
intentionally disabled, proceed to Test Step 12.
Use the electronic service tool to perform an injector sole-
noid test. Refer to Troubleshooting, “Injector Solenoid -
Test”. If the engine will not start, proceed to Test Step 10.
10. Electronic Control Module (ECM)
A. Make sure that the latest flash file for the application is in-
stalled in the ECM.
ECM Result: Installation of the latest flash file does not eliminate
the fault.
Repair: Contact the Dealer Solutions Network (DSN).
Note: This consultation can greatly reduce the repair time.
If the DSN recommends the use of a test ECM, install a test
ECM. Refer to Troubleshooting, “Test ECM Mode”.
Attempt to start the engine. If the engine will not start, install
the original ECM and then proceed to Test Step 11.
If the engine starts normally, reconnect the suspect ECM
and then verify that the fault returns when the suspect ECM
is installed.
If the engine will not start with the suspect ECM, replace
the ECM and then check that the engine starts normally.
(continued)
138 UENR4469-36
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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