KENR9126 63
Troubleshooting Section
Engine Oil Pump
1. Inspect the components of the engine oil pump for
excessive wear. Repair the oil pump or replace
the oil pump, i
f necessary.
2. If no faults are found, proceed to “Bearing
Clearance”.
Bearing Clearance
Inspect the engine components for excessive bearing
clearance or damaged bearings. If necessary,
replace the
bearings and/or the components. Inspect
the following components for excessive bearing
clearance:
•
Crankshaft main bearings
•
Connectin
g rod bearings
•
Camshaft front bearing
•
Idler gear bearing
i04010470
Low Power/Poor or No
Response to Th rottle
Probable Causes
•
Diagnostic codes
•
Event codes
•
Electrical connectors
•
Air intake and exhaust system
•
Valve lash
•
Turbocharger
•
Fuel supply
•
Low compression (cylinder pressure)
•
Individual malfunct ioning cylinder
•
Electronic unit injectors
•
Throttle signal
•
Mechanical throttle cable
Recommended Ac
tions
NOTICE
Do not crank th
e engine continuously for more than
30 seconds. Allow the starting motor to cool for two
minutes before cranking the engine again.
Diagnostic Codes and Event Codes
Check for ac
tive diagnostic codes on the electronic
service tool. Troubleshoot any active codes before
continuing with this procedure.
ECM Parameters
1. Use the ele
ctronic service tool to make sure that
the FLS and FTS parameters have been correctly
entered.
2. Use the electronic service tool to ensure that the
correct mode was selected.
3. Use the electronic service tool to verify that the
correct engine rating has been provided.
4. Use the electronic service tool to verify the
maximum engine speed limit.
5. Ensure that the repairs have eliminated the fault.
6. If the r
epairs have not eliminated the fault proceed
to “Electrical Connectors”.
Electr
ical Connectors
1. Turn the keyswitch to the ON position.
2. Use the electronic service tool to verify that
the intake manifold pressure is 0 ± 0.5 kPa
(00 ±
0.070 psi). Check the 5 V sensor supply
for the intake manifold pressure. Refer to
Troubleshooting, “5 V Engine Pressure Sensor
Supp
ly C ircuit - Test”.
3. Use the electronic service tool to verify the throttle
pos
ition status.
4. Run the engine until the speed is equal to the
max
imum no-load speed.
5. Use the electronic service tool to make sure that
th
e throttle is set to reach the maximum no-load
speed.
6. If
the engine speed is erratic refer to
Troubleshooting, “Throttle Position Sensor - Test”.
7. If
the fault has not been eliminated, proceed to
“Air Intake and Exhaust System”.
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