Navistar MaxxForce 9 - Graph 7: Low Exhaust Gas Temperatures (Restricted Afi)

DIAGNOSTICMANUAL
4.7.GRAPH7:LOWEXHAUSTGASTEMPERATURES(RESTRICTEDAFI)
NOTE–SnapshotrecordedbelowwithDieselParticulateFilter(DPF)sootloadlevel1.
1.DieselOxidationCatalystInlet
Temperature(DOCIT)(degrees
Fahrenheit)[Blue]
2.DieselParticulateFilterInlet
Temperature(DPFIT)(degrees
Fahrenheit)[Orange]
3.DieselParticulateFilterOutlet
Temperature(DPFOT)(degrees
Fahrenheit)[Green]
Figure11Graph7:LowExhaustGasTemperatures(RestrictedAFI)
GraphAnalysis:
ThisgraphshowslowexhaustgastemperaturesindicatingarestrictedAftertreatmentFuelInjector(AFI).Low
temperaturesintheexhauststreamoccurwhenfuelowfromtheAFIisrestricted,resultinginlessfuelburning
intheexhauststream.Thistestdoesnotgivepassorfailresults.Itonlyallowstheusertovalidateoperation
oftheaftertreatmentsystembymonitoringexhaustgastemperatures.
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