Navistar MaxxForce 9 - Graph 2: Air Management System Test (Bad)

DIAGNOSTICMANUAL
10.2.GRAPH2:AIRMANAGEMENTSYSTEMTEST(BAD)
1.Enginespeed(rpm)[Green]
2.Turbocharger2WastegateControl
(TC2WC)(percent)[Purple]
3.IntakeManifoldPressure(IMP)
(psi)[Orange]
Figure27Graph2:AirManagementSystemTest(Bad)
GraphAnalysis:
ThisgraphshowsanAirManagementSystem(AMS)notoperatingasdesignedduringtheAirmanagement
Test(AMT).TheAMTdoesnotgivepassorfailresults.ItonlyallowstheusertovalidatetheAMSby
monitoringtheeffectseachactuatorhasonIntakeManifoldPressure(IMP)sensor.IMPisnormallybetween8
psi(55kPa)to13psi(90kPa)onenginerampupduringAMT.IfTurbocharger2WastegateControl(TC2WC)
isnotoperatingasdesigned,boostpressurewillnotrespondtochangesinengineload.Excesssootwillthen
begeneratedbytheenginecausingfrequentregenerationoftheaftertreatmentsystem.
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