Navistar MaxxForce 9 Diagnostic Manual

DIAGNOSTICMANUAL
Table184ParkedRegenChecks
UsingESTwithServiceMaxx™software,opentheAftertreatmentsession.Opentheinhibitorstabandcheck
forInhibitors.
Checks
ExpectedResults
Comment
Enginecondition
Smooth,notstumblingIfenginedoesnotrunsmoothly,diagnoseengine
performanceproblem.See“PERFORMANCE
DIAGNOSTICSinappropriateEngineDiagnosticManual.
DPFStatus
RegenNeeded
Ifsignalreads“Notneeded”,thanaRegencannotbe
commandedtorun.
EngineCoolant
Temperature
Above150ºF(66ºC)Ifbelow150ºF(66ºC),warmengineabovesetpoint.
AFTRegenStatus
Active
Ifsignalreads“NotActive”,checkforfaultcodesand
ParkedRegenInhibitors.
EGRPositionClosedIfnotclosed,diagnosesensororcircuit(Seeappropriate
EngineDiagnosticManual).
ETVPosition
80%±5%Ifnotwithinspecications,seediagnosesensororcircuit
(SeeappropriateEngineDiagnosticManual).
DOCIT482ºF(250ºC)to
572ºF(300ºC)
Ifbelow482ºF(250ºC),usingElectronicServiceTool
(EST)withServiceMaxx™software,runtheKOERAir
ManagementT est.
Ifabove572ºF(300ºC),checkforproperETVoperation,
andifengineisoverfueling.
DOCOTAfter5-10minutes
above986ºF(530ºC)
Ifbelow986ºF(530ºC),diagnoseandrepairactive
DOCOTfaultcode(s)(Ex.SPN4766FMI10).Ifnoactive
faultcode(s),gotoappropriateaftertreatmentsystem
diagnosticssectioninthismanual.
DPFOTBelow1292ºF(700ºC)Ifabove1292ºF(700ºC),diagnoseandrepairactive
DPFOTfaultcode(s).Ifnoactivefaultcode(s),goto
appropriateaftertreatmentsystemdiagnosticssectionin
thismanual.
DPFDP
Below0.5psi(3.4
kPa)
Ifabove0.5psi(3.4kPa),afterthesystemcompletesa
fullParkedRegen,diagnoseandrepairactiveDPFDP
faultcode(s).Ifnoactivefaultcode(s),gotoappropriate
aftertreatmentsystemdiagnosticssectioninthismanual.
IftheDPFisfaceplugged,measurethedistancebetweenthelterandoutlet.Ifnotwithinspecication,
theltercannotbecleanedandmustbereplaced.
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Navistar MaxxForce 9 Specifications

General

Brand	Navistar
Model	MaxxForce 9
Category	Engine
Language	English