Navistar MaxxForce 9

DIAGNOSTICMANUAL
Table21ExampleTC1TOP(Actual)Calculations
MaximumTC1TOPSignal
ValueDuringCranking
TC1TOPKOEOSignalValueMaximumTC1TOPSignalValueDuring
Cranking—TC1TOPKOEOSignal
Value=TC1TOP(Actual)
15.7psi(108kPa)14.7psi(101kPa)15.7psi(108kPa)–14.7psi(101kPa)=
1psi(7kPa)
1psi(7kPa)0psi(0kPa)1psi(7kPa)–0psi(0kPa)=1psi(7kPa)
-13psi(-89kPa)-14psi(–96kPa)–13psi(80kPa)–(–14)psi(-96kPa)=1
psi(7kPa)
Step
ActionDecision
2
DetermineiftheDieselParticulateFilter(DPF)iscontaminated.
RemovetheDPF(seeExhaustSystemServiceManual),andcheck
forsignsoflubeoilandcoolantcontamination.
NOTE–Ablackstainingintheexhausttailpipecanoccuron
applicationsthatexperiencehighidletimes.Thisisnormaland
theDPFshouldNOTbereplaced.
IstheDPFcontaminated?
Yes:RemovePre-Diesel
OxidationCatalyst
(PDOC)&Diesel
OxidationCatalyst(DOC),
andthenandthengoto
step4.
No:Gotostep5
Step
ActionDecision
3
DetermineifPDOCorDOCiscontaminated.RemovethePDOC
andDOC(seeExhaustSystemServiceManual),andcheckfor
signsoflubeoilandcoolantcontamination.
NOTE–Ablackstainingintheexhausttailpipecanoccuron
applicationsthatexperiencehighidletimes.Thisisnormaland
theDPFshouldNOTbereplaced.
ArethePDOCandDOCcontaminated?
Yes:RemoveDPF ,and
thengotostep4.
No:Gotostep5
Step
ActionDecision
4
DetermineifDPF ,DOC,andPDOCarereusableseetheDPFand
DOCreuseguidelinespage159.
BasedonDPFandDOCRe-UseGuidelines,aretheDPF ,DOC,
andPDOCreusable?
Yes:Gotostep6
No:Replacefailed
component(s).After
repairsarecomplete,go
tostep6.
18
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