Table 14
Troubleshooting Test Steps Values Results
1. Insulation on the Exhaust Duct (if equipped)
A. Check the insulation on the exhaust duct between the engine
and the Clean Emissions Module (CEM). Make sure that insula-
tion is not missing or damaged.
Codes Result: The insulation is missing or damaged.
Repair or replace the insulation.
Result: The insulation is OK.
Proceed to Test Step 2.
2. Diagnostic Codes
A. Connect the electronic service tool to the diagnostic connector.
B. Check for active diagnostic codes.
C. Use the electronic service tool to perform a service
regeneration.
D. Check for active diagnostic codes on the electronic service
tool.
Diagnostic codes Result: There are active diagnostic codes.
Investigate any active codes before continuing with this
procedure. Refer to Troubleshooting, “Diagnostic Trouble
Codes”.
Result: There are no active diagnostic codes.
Proceed to Test Step 3.
3. Maintenance Schedule
A. Check the maintenance schedule for the DPF. Refer to the Op-
eration and Maintenance Manual, “Maintenance Interval
Schedule”.
Maintenance
schedule
Result: The DPF is due for an ash service.
Perform an ash service. Refer to the Operation and Main-
tenance Manual, “Diesel Particulate Filter - Clean”.
Result: The DPF is not due for an ash service.
Proceed to Test Step 4.
(continued)
UENR0612
47
Symptom Troubleshooting
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