KENR9126 53
Troubleshooting Section
•
Bent components
4. If the crankshaft rotates correctly and no fluid is
expelled, install the glow plugs.
i04010460
Excessive B lack Smoke
Probable Causes
•
Diagnostic codes
•
ECM software
•
Air intake system or exhaust system
•
Valve lash
•
Turbocharger
•
Low compression (cylinder pressure)
•
Electronic unit injectors
•
Individual malfunct ioning cylinder
Recommended Actions
Diagnostic Codes
Check for active diagnostic codes on the electronic
service tool. T roubleshoot any active codes before
continuing with this procedure.
ECM Software
1. Connect the electronic service tool to the
diagnostic connector and check for the following
conditions:
•
Check for the correct engine serial number
•
Check for the correct arrangement number
•
Check for the correct software
2. Use the electronic service tool to verify any active
diagnostic codes.
3. If diagnostic codes are present, the Electronic
Control Module (ECM) must be programmed with
the correct information.
4. If the repairs have not eliminated the fault proceed
to “Air Intake System or Exhaust System”.
Air Intake System or Exhaust System
1. Check the air filter restriction indicator, if equipped.
2. Ensure that th
eairfilter is clean and serviceable.
3. Check the air intake and the exhaust system for
the followin
gdefects:
•
Blockages
•
Restrictions
•
Damage to th
e air intake and exhaust lines and
hoses
4. Make all ne
cessary repairs to the engine.
5. If the fault has not been eliminated, proceed to
“Valve Las
h”.
Valve Lash
Ensure that the valve lash is correct. Reset the valve
lash if it is not correct.
If the repair does not eliminate the fault proceed to
“Turbocharger”.
Turbocharger
Note: T
he turbocharger that is installed on this
engine is a nonserviceable item. If any mechanical
fault exists, then the turbocharger must be replaced.
1. Ensure that the mounting bolts for the turbocharger
are tight.
2. Check that the oil drain for the turbocharger is not
blocked or restricted.
3. Check that the compressor housing for the
turbocharger is free of dirt, debris, and damage.
4. Check that the turbine housing for the turbocharger
is free of dirt, debris, and damage.
5. Check that the turbine blades rotate freely in the
turbocharger.
6. Ensure that the wastegate on the turbocharger
is adjusted correctly. If the wastegate actuator is
fau
lty, replace the turbocharger.
7. If necessary, replace the turbocharger.
8. Check that the repairs have eliminated the fault.
9. If
the repairs have not eliminated the fault proceed
to “Low Compression (Cylinder Pressure)”.
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