KENR6933 53
Troubleshooting Section
2. Make all necessary repairs. Ensure that the
repairs have el
iminated the fault. If the vibration
is still present proceed to “Low Compression
(Cylinder Pressure)”.
Low Compression (Cylinder Pressure)
1. Perform a comp
ression test. Refer to Testing and
Adjusting, “Compression - Test ”.
2. If low compres
sion is noted on any cylinders,
investigate the cause and rectify the cause.
Possible cau
ses of low compression are shown
in the following list:
•
Loose glow pl
ugs
•
Faulty piston
•
Faulty piston rings
•
Worn cylinde
r bores
•
Worn valves
•
Faulty cylinder head gasket
•
Damaged cyli
nder head
3. Perform all necessary repairs.
4. Ensure that the repairs have eliminated the faults.
5. If the repair
does not eliminate the fault refer to
“Malfunctioning Individual Cylinder”.
Malfunctio
ning Individual Cylinder
1. With the engine speed at a fast idle, use the
electronic
service tool to isolate one cylinder at
a time. Note if there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolate
d cylinder is not operating under normal
conditions. If the isolation of a particular cylinder
results in a reduction of engine speed that is less
than norma
l, this may indicate that the cylinder is
operating below normal performance. Investigate
the cause of the fault on any cylinder that is
not operat
ing. Investigate the cause of the fault
on any cylinder that is operating below normal
performance.
2. If all cylinders have been checked and no
faults were detected proceed to “Electronic Unit
Injector
s”.
Electronic Unit Injectors
1. With the engine speed at a fast idle, use the
electronic service tool to isolate one cylinder at
a time. Note if
there is any reduction in engine
speed. If a reduction in engine speed is not noted,
the isolated electronic unit injector is not operating
under normal
conditions. If the isolation of a
particular cylinder results in a reduction of engine
speed that is less than normal, this may indicate
that the elec
tronic unit injector is operating below
normal performance.
2. Remove the el
ectronic unit injector from the
suspect cylinder. Refer to Disassembly and
Assembly, “Electronic Unit Injector - Remove”.
3. Install a new electronic unit injector. Refer to
Disassembly and Assembly, “Electronic Unit
Injector - I
nstall”.
4. Repeat the test in 1. If the fault is still apparent,
remove the
replacement electronic unit injector
and install the original electronic unit injector.
Refer to Disassembly and Assembly, “Electronic
Unit Injec
tor - Remove” and Disassembly and
Assembly, “Electronic Unit Injector - Install”.
i02444985
Engine Will No t Crank
Probable Causes
•
Power generator
•
Battery cables and/or batteries
•
Starting motor solenoid or starting circuit
•
Starting motor and/or flywheel ring gear
•
Electrical power supply
•
Internal engine fault
•
Control system
Recommended Repairs
Power Generator
Make sure that the power generator is free to rotate.
If the power generator does not rotate, refer to the
documentation that is supplied by the OEM.
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