
52 RENR5622
Troubleshooting Section
•
Fuel injector
•
Turbocharger
•
Atmospheric pr
essure sensor
•
“Fuel Position” and/or “FRC Fuel Limit”
•
Flash file
•
Fuel quality
•
Valve adjustment
Recommended Actions
Air Shutoff (if applicable)
Check that bot
h the air shutoffs are open.
Air Inlet and Exhaust System
1. Check the air inlet system for restrictions and/or
for leaks.
a. Check for an air filter restriction.
b. Check for dera
tes and for alarms.
c. Perform a visual inspection of the system for
restrictions
and/or for leaks.
2. Check the exhaust system for restrictions.
3. Repair any leaks that were found. Remove
any restrictions that were found. Replace any
damaged comp
onents that were found.
Fuel Injector
Check that the injector trim codes have been entered.
Perform the “Cylinder Cutout Test”. Use similar
conditions f
or the test that were experienced during
operation. Refer to the diagnostic functional test
Troubleshooting, “Injector Solenoids”.
Turbocharger
Verify that
the turbocharger has not failed. Periodic
inspection and cleaning is recommended for the
turbocharger compressor housing (inlet side).
Atmospheric Pressure Sensor
1. Check the atmospheric pressure sensor for dirt
and/or for debris. Remove the dirt and/or the
debris. The at
mospheric pressure should be
between 50 kPa (7.2 psi) and 100 kPa (14.5 psi).
The atmospheric pressure will vary depending
on your altit
ude. If there is an active diagnostic
code, perform the diagnostic functional test
Troubleshooting, “Engine Sensor Open/Short
Te st”.
2. Verify that the crankshaft and the camshaft drive
gears are set
with the proper orientation. Refer to
the Disassembly and Assembly manual.
Turbocharge
r Compressor Outlet
Pressure Sensor, “Fuel Position”, and/or
“FRC Fuel Limit”
1. Monitor the status of “Fuel Position” and “Rated
Fuel Limit” while the engine is operating under full
load.If“F
uel Position” equals “Rated Fuel Limit”
and “Fuel Position” is less than “FRC Fuel Limit”,
the electronics are operating correctly. Otherwise,
proceed to
the next Step.
2. Verify that there are no active diagnostic codes
for the tur
bocharger compressor outlet pressure
sensor.
3. Monitor th
e status of “Turbocharger compressor
outlet pressure” and “Atmospheric Pressure” for
normal operation on the Caterpillar Electronic
Technici
an (ET). When the engine is not running,
“Turbocharger compressor outlet pressure” should
be0kPa(0psi).
Note: A problem with the FRC will only cause black
smoke during acceleration. A problem with the FRC
will not
cause black smoke during steady state
operation.
Flash Fi
le
Verify that the correct flash file is installed. Refer
to Troub
leshooting, “Flash Programming” for more
information.
Fuel Qu
ality
Cold weather adversely affects the characteristics of
the fue
l. Refer to Operation and Maintenance Manual
for information on improving the characteristics of the
fuel during cold weather operation.