Navistar MaxxForce 9

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DIAGNOSTICMANUAL

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1.AfterDieselOxidationCatalyst(DOC)reachesoperatingtemperatureandstabilizes,verifyDiesel

ParticulateFilterInletTemperature(DPFIT)signalvalueisatapproximatetargettemperaturefor

currentsootloadlevel(SeeSootLoadLevelvs.ExhaustGasT argetTemperatureChart,page62).

2.VerifyDieselOxidationCatalystInletTemperature(DOCIT)signalvalueisbetween550°F(287°C)

to800°F(427°C).

NOTE–ItisnormaltoseeDOCIT ,DPFIT,andDPFOTsignalvaluestouctuateatthebeginningandend

oftheOBFCT .

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