Navistar MaxxForce 9 - Page 138

DIAGNOSTICMANUAL
Actions:
1.AfterDOCreachesoperatingtemperatureandstabilizes(seecallout2,graph8),verifyDOCOT
andDPFOTsignalvaluesaregreaterthan900°F(482°C).Inthisgraph,DOCOTandDPFOT
arelessthan900°F(482°C).
2.VerifyDieselOxidationCatalystInletTemperature(DOCIT)signalvalueisbetween550°F(287°C)
to800°F(427°C).
NOTE–ItisnormaltoseeDieselOxidationCatalystInletTemperatureDOCIT,DOCOT ,andDPFOTsignal
valuestouctuateatthebeginningandendoftheOBFCT.
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