Navistar MaxxForce 9

DIAGNOSTICMANUAL
Step
ActionDecision
10
RunDSISystemDe-AerationProceduretwice,topurgethe
DownStreamInjection(DSI)systemofair.UsingEST ,goto
Procedures>KOERAftertreatmentProcedures>DSISystem
De-Aeration.
Afterprocedureiscomplete,goto
step11
Step
ActionDecision
11
UsingEST ,checkDiagnosticTroubleCode(DTC)listforfault
code(s)thatmayhavebecomeactiveduringOBFCT .
DoesDTClistcontainactivefaultcode(s)?
Yes:Repairactivefaultcode(s)
(SeeElectronicControlSystems
DiagnosticsinEngineDiagnostic
Manual).Afterrepairsarecomplete,
gotostep12.
No:Gotostep12
Step
ActionDecision
12
Verifyexhaustgastemperaturesarewithinspecication.
1.UsingElectronicServiceT ool(EST)with
ServiceMaxx™software,gotoSessions>
Performanceandselecttherecordsnapshoticon
fromthetoolbar.
2.GotoT ests>KOERAftertreatmentT ests>
OnboardFilterCleanlinessT est.
WhenOBFCTiscomplete,stoprecording.Usetheplayback
featureandgraphthefollowingsignalvaluesfromOBFCT:
SignalValues:
•DieselOxidationCatalystInletTemperature(DOCIT)
•DieselOxidationCatalystOutletT emperature(DOCOT)
•DieselParticulateFilterOutletTemperature(DPFOT)
•DPFSootLoad
ComparesnapshottoGraphs7and8page131.
Whichgraphdoessnapshotmostcloselymatch?
Graph7:Gotostep13
Graph8:Afterrepairsarecomplete,
retestfororiginalproblem.
89
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