DIAGNOSTICMANUAL
Step
ActionDecision
2
RemoveandInspecttheDieselParticulateFilter(DPF)
only(SeeExhaustSystemServiceManual).
DONOTREMOVETHEDieselOxidationCatalyst
(DOC).
RefertotheDPFandDOCReuseGuidelinesinthis
manualpage159.
CantheDPFbereused?
Yes:InstalltheDPFandgotostep3
No:ReplacetheDPFandgotostep4
Step
ActionDecision
3
PerformOnboardFilterCleanlinessT est(OBFCT)to
clearactiveaftertreatmentfaultcode(s).UsingElectronic
ServiceT ool(EST)withServiceMaxx™software,goto
Tests>KOERAftertreatmentT ests>OnboardFilter
CleanlinessT est.
WhileOBFCTisrunning,checkthefollowing
componentsforexhaustleaks,andverifyallfasteners,
brackets,andclampsaresecureandundamaged:
•LowPressure(LP)turbochargeroutletpipe
•ExhaustBackPressureValve(EBPV)
•FlexiblemeshpipetoDieselOxidationCatalyst
(DOC)inlet
•InlettoDOC
Wereallcomponentsfreeofexhaustleaksand
allfasteners,brackets,andclampssecureand
undamaged?
Yes:Repaircomplete
No:Repairleaksorotherfaultsfound.
Endofdiagnostics
114
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