Navistar MaxxForce DT Diagnostic Manual page 118

DIAGNOSTIC MANUAL
Step
2 Remove and Inspect the Diesel Particulate Filter (DPF)
only (See Exhaust System Service Manual).
DO NOT REMOVE THE Diesel Oxidation Catalyst
(DOC).
Refer to the DPF and DOC Reuse Guidelines in this
manual page 159.
Can the DPF be reused?
Step
3 Perform Onboard Filter Cleanliness Test (OBFCT) to
clear active aftertreatment fault code(s). Using Electronic
Service Tool (EST) with ServiceMaxx™ software, go to
Tests > KOER Aftertreatment Tests > Onboard Filter
Cleanliness Test.
While OBFCT is running, check the following
components for exhaust leaks, and verify all fasteners,
brackets, and clamps are secure and undamaged:
• Low Pressure (LP) turbocharger outlet pipe
• Exhaust Back Pressure Valve (EBPV)
• Flexible mesh pipe to Diesel Oxidation Catalyst
(DOC) inlet
• Inlet to DOC
Were all components free of exhaust leaks and
all fasteners, brackets, and clamps secure and
undamaged?
114
Action
Action
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Decision
Yes: Install the DPF and go to step 3
No: Replace the DPF and go to step 4
Decision
Yes: Repair complete
No: Repair leaks or other faults found.
End of diagnostics