DIAGNOSTICMANUAL
MAXXFORCE
®
DT,9AND10AFTERTREATMENTSYSTEMDIAGNOSTICS
3.1.STARTDIAGNOSTICSHERE:ENGINEANDAFTERTREATMENTSYSTEM
OPERATIONALCHECKS
Overview
Aproperlyoperatingaftertreatmentsystemrequireslittlemanualinterventionfromtheoperator.Illuminated
warninglampsmayindicateadrivingorextendedidleoperationthatmaynotallowsuccessfulregeneration
oftheaftertreatmentsystem.Theseilluminatedwarninglampsmayalsoindicateanenginemechanicalor
performanceconcern.
ToolsRequired
•ElectronicServiceTool(EST)withServiceMaxx™software
•Interfacecable(RP1210BcompliantsupportingJ1939andJ1708)
NOTE–AfrequentregenconcernmaynotberepairedbyonlyperforminganOnboardFilterCleanliness
Test(OBFCT).Performallstepsinthefollowingdiagnosticprocedureinordertoidentifyrootcause
failure.
NOTE–Repairallactivefaultcode(s)otherthanSPN3719(DPFSootLoad)beforebeginningEngine
andAftertreatmentSystemOperationalChecks.
OperationalChecks–StartAftertreatmentDiagnosticsHere
Step
ActionDecision
1
Verifythefollowingenginesystemsareinsatisfactorycondition:
•EngineOil:Parkvehicleonlevelgroundandcheckoillevel.
•EngineCoolantLevel:Checkcoolantlevelthatisindicatedon
deaerationtank.
•IntakeAir:Inspectairltergauge,locatedonairlterhousingor
dashboard.
•ElectricalSystem:Inspectbatteriesandelectricalsystem(engineand
vehicle)forpoororlooseconnections,corrodedterminals,orbroken
anddamagedwires.
•ExhaustSystem:CheckAftertreatmentandexhaustsystemfor
damage,excessivecorrosion,orleaks.
•Fuellevel:Checkinstrumentpanelfuelgauge,lookintofueltanksto
verifyfuellevel,andmakesurefuellevelsareequalinbothtanks.
•FuelqualityObtainafuelsample,andcheckforwater,waxing,icing,
sediment,gasoline,DieselExhaustFluid(DEF),orkerosene.
•Fuellineroutingandcondition:WithengineOFF,visuallyinspect
theconditionandroutingoffuellines.
Arealloftheaboveenginesystemsoperatingasdesigned?
Yes:Gotostep2
No:Repair
appropriate
enginesystem
andgotostep2.
5
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