(Table 85, contd)
Troubleshooting Test Steps
Values Results
13. Electronic Unit Injectors
A. Use the electronic service tool to perform the automatic
“Cylinder Cut Out Test” .
Note: If the compression test that was performed in Test Step
9 was satisfactory, the “Cylinder Cut Out Test” will identify any
faulty injectors.
Electronic Unit
Injectors
Result: A faulty injector is indicated.
Repair: Remove any faulty electronic unit injectors. Refer to
Disassembly and Assembly, “Electronic Unit Injector -
Remove”.
Install new electronic unit injectors. Refer to Disassembly and
Assembly, “Electronic Unit Injector - Install”.
Repeat the automatic “Cylinder Cut Out Test” . If the fault is
still apparent, remove the replacement electronic unit injector
and install the original electronic unit injector. Refer to Disas-
sembly and Assembly, “Electronic Unit Injector - Remove” and
Disassembly and Assembly, “Electronic Unit Injector - Install”.
Result: All injectors are OK.
Proceed to Test Step 14.
14. Individual Malfunctioning Cylinders
A. With the engine speed at a fast idle, use the electronic
service tool to perform the manual “Cylinder Cut Out Test” .
As each cylinder is cut out, listen for a change in the sound
from the engine. When a cylinder is cut out, there should be a
noticeable change in the sound of the engine.
Note: If a change in the sound of the engine is not noted, the
isolated cylinder is not operating under normal conditions. If
the isolation of a cylinder results in a change in the sound that
is less noticeable, the cylinder may be operating below nor-
mal performance.
Cylinders Result: The test indicates a faulty cylinder.
Repair: Investigate the cause of the fault on any cylinder that
is not operating. Investigate the cause of the fault on any cylin-
der that is operating below normal performance.
Result: The test indicates that all cylinders are OK.
Contact the Dealer Solutions Network (DSN).
i07715447
Engine Vibration Is Excessive
Refer to Systems Operation, Testing and Adjusting
for additional information on determining the cause of
this condition.
Probable Causes
• Driven equipment
• Engine supports
• Low compression (cylinder pressure)
• Electronic unit injectors
• Individual malfunctioning cylinder
Recommended Actions
Note: When performing the following procedure, do
not stand near the engine. The vibration may indicate
an imminent component failure.
Note: Complete the procedure in the order in which
the steps are listed.
UENR4469-36 169
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
