Troubleshooting

38 RENR2696-01
Troubleshooting Section
4. Use the electronic service tool to verify the
maximum engine
speed limit.
5. Use the electronic service tool to reset the
parameters to
the OEM specifications.
6. Ensure that the repairs have eliminated the
performance p
roblems.
7. If the repairs have not eliminated the faults
proceed to “Ch
eck the Signal for the Throttle
Position Sensor ”.
Check the Sig
nal fo r the Throttle P osition
Sensor
1. Use the elect
ronic service tool and observe the
signal for the throttle position sensor.
2. If the signal
is erratic, refer to Troubleshooting,
“Throttle Position Sensor Circuit - Test”.
3. If the engin
ehasathrottleswitchreferto
Troubleshooting, “Throttle Switch Circuit - Test”.
i01798114
Coo lant in Engine Oil
Note: This is NOT an electronic system problem.
Refer to Testing and Adjusting for information on
determining the cause of this condition.
Probable Causes
•
Engine oil cooler core
•
Cylinder head gasket
•
Cylinder head
•
Cylinder block
Recommended Actions
Engine Oil Cooler Core
1. Drain the engine lubricating oil from the engine.
2. Check for leaks in the oil cooler core. Refer to
Testing and Adjusting, “Cooling System” for the
correct procedure. If a leak is found, install a
new oil cooler core. Refer to Disassembly and
Assembly, “Engine Oil Cooler - Remove” for the
correct procedure. Fit new seals between the oil
cooler and the oil cooler cover.
3. Remove the oil filter element or elements. Fit a
new engine oil f
ilter element or elements. Fill the
crankcase with clean engine oil to the correct
level. Refer to the Operation and Maintenance
Manual, “Engi
ne Oil and Filter - Change” for more
information.
Cylinder Hea
d Gas ket
1. Remove the cylinder head. Refer to Disassembly
and Assembly
, “Cylinder Head - Remove” for the
correct procedure.
2. Inspect the c
ylinder head gasket for faults and any
signs of leakage.
3. Check the cyl
inder liner projection. Refer to
Testing and Adjusting, “Basic Block” for more
information. Correct the cylinder liner projection if
it is incorr
ect.
4. If all of the cylinder liner projections were correct,
and if there
was no obvious signs of a faulty head
gasket proceed to the recommended actions for
the Cylinder Head.
5. If any of the cylinder liner projections were
incorrect, and this had resulted in the failure of the
head gaske
t, fit a new head gasket.
6. To fit a new cylinder head gasket, refer to
Disassemb
ly and Assembly, “Cylinder Head -
Install” for the correct procedure.
Cylinder H
ead
Check the cylinder head for flatness. Refer to
Systems O
peration, “Cylinder Head - Inspect” for the
correct procedure.
Check for
cracks in the cylinder head. If a crack is
found, repair the cylinder head and/or replace the
cylinder head. Refer to Disassembly and Assembly,
“Cylinde
r Head - Install” for the correct procedure.
If the cylinder head is flat and if the cylinder head is
not crack
ed then refer to the recommended actions
for the Cylinder Block.
Cylinde
rBlock
Inspect the cylinder block for cracks. If a crack is
found, r
epair the cylinder block or replace the cylinder
block.