(Table 88, contd)
Troubleshooting Test Steps
Values Results
11. Individual Malfunctioning Cylinders
A. With the engine speed at a fast idle, use the electronic service
tool to perform the manual “Cylinder Cut Out Test” .
As each cylinder is cut out, listen for a change in the sound from
the engine. When a cylinder is cut out, there should be a notice-
able change in the sound of the engine.
Note: If a change in the sound of the engine is not noted, the iso-
lated cylinder is not operating under normal conditions. If the isola-
tion of a cylinder results in a change in the sound that is less
noticeable, the cylinder may be operating below normal
performance.
Cylinders Result: The test indicates a faulty cylinder.
Repair: Investigate the cause of the fault on any cylin-
der that is not operating. Investigate the cause of the
fault on any cylinder that is operating below normal
performance.
Proceed to Test Step 12.
Result: The test indicates that all cylinders are OK.
Contact the Dealer Solutions Network (DSN).
12. Check the Aftertreatment System for Oil or Fuel
A. Remove excess oil or fuel from the piping with a clean cloth.
B. Remove the Clean Emissions Module (CEM). Refer to Disas-
sembly and Assembly, “Clean Emissions Module - Remove and
Install”.
C. Support the CEM over a suitable container with the exhaust in-
let downwards. Leave the CEM to drain for 8 hours.
D. Check the quantity of drained oil or fuel in the container.
CEM Result The volume of drained oil or fuel is greater than
1.0 L (1.05669 qt).
Repair: Install a replacement CEM. Refer to Disassem-
bly and Assembly, “Clean Emissions Module - Remove
and Install”.
Return the unit to service.
Result The volume of drained oil or fuel is less than
1.0 L (1.05669 qt).
Proceed to Test Step 13.
13. Recover the Aftertreatment System
A. Clean any remaining oil or fuel from the piping and the CEM in-
let with a clean cloth.
B. Install the Clean Emissions Module (CEM). Refer to Disassem-
bly and Assembly, “Clean Emissions Module - Remove and
Install”.
C. Run the engine at high idle with no load for a minimum of 20
minutes.
Note: During the following step, there are two versions of the
“Aftertreatment Recovery Procedure” . One version is for engines
with a DPF. The other version is for engines without a DPF. Ensure
that the correct procedure is used.
Note: Engine RPM Override may be necessary to complete the
Aftertreatment Recovery Procedure.
D. Use the electronic service tool to perform the “Aftertreatment
Recovery Procedure” . While the procedure is progressing, check
for smoke from the exhaust. Some smoke will be evident during
the procedure. The smoke must dissipate before the procedure is
completed.
CEM Result: The “Aftertreatment Recovery Procedure”
completes with a soot load of less than 80% and no
smoke from the exhaust.
Return the unit to service.
Result The “Aftertreatment Recovery Procedure” com-
pletes with a soot load of more than 80% or smoke
from the exhaust.
Contact the Dealer Solutions Network (DSN).
UENR4469-36 179
Symptom Troubleshooting
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