Navistar MaxxForce 9

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.
60
https://www.truck-manuals.net/