Navistar MaxxForce 10

DIAGNOSTICMANUAL
Step
ActionDecision
15
RunDSISystemDe-AerationProceduretwice,topurgetheDown
StreamInjection(DSI)systemofair.UsingEST,gotoProcedures
>KOERAftertreatmentProcedures>DSISystemDe-Aeration.Gotostep16
Step
ActionDecision
16
UsingEST ,checkDiagnosticTroubleCode(DTC)listforfault
code(s)thatmayhavebecomeactiveduringOBFCT .
DoesDTClistcontainactivefaultcode(s)?
Yes:Repairactivefault
code(s)(SeeElectronicControl
SystemsDiagnosticsinEngine
DiagnosticManual).After
repairsarecomplete,gotostep
17.
No:Gotostep17
Step
ActionDecision
17
Verifyexhaustgastemperaturesarewithinspecication.
1.UsingElectronicServiceTool(EST)with
ServiceMaxx™software,gotoTests>KOER
AftertreatmentT ests>OnboardFilterCleanlinessTest
(OBFCT).
2.GotoSessions>Performanceandselecttherecord
snapshoticonfromthetoolbar.
WhenOBFCTiscomplete,stoprecording.Usetheplayback
featureandgraphthefollowingsignalvaluesfromOBFCT :
SignalValues:
•DieselOxidationCatalystInletT emperature(DOCIT)
•DieselParticulateFilterInletTemperature(DPFIT)
•DieselParticulateFilterOutletT emperature(DPFOT)
•DPFSootLoad
ComparesnapshottoGraph5and6page57.
Whichgraphdoessnapshotmostcloselymatch?
Graph5:Gotostep18
Graph6:ReplaceDOC.After
repairsarecomplete,retestfor
originalproblem.
Step
ActionDecision
18
Verifyrootcauseoffrequentregenssymptom.
Hasrootcauseforfrequentregensbeendiagnosedandrepaired?
Yes:Gotostep19
No:Gobacktostep1ofEngine
andAftertreatmentSystem
OperationalChecksonpage5
toverifyenginesystemsarein
satisfactorycondition.
42
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