Navistar MaxxForce 9 - Graph 4: 0 to 60 Mph Test (Engine Speed, Engine Load, Imp, Ebp, and App1)

DIAGNOSTICMANUAL
4.4.GRAPH4:0TO60MPHTEST(ENGINESPEED,ENGINELOAD,IMP ,EBP ,AND
APP1)
1.AcceleratorPedalPosition1
(APP1)(percent)[Orange]
2.ExhaustBackPressure(EBP)
(psi)[Red]
3.Engineload(percent)[Blue]
4.Enginespeed(rpm)[Green}
5.IntakeManifoldPressure(IMP)
(psi)[Purple]
Figure8Graph4:0to60MPHTest(EngineSpeed,EngineLoad,IMP ,EBP ,andAPP1)
GraphAnalysis
ThisgraphshowstheIntakeManifoldPressure(IMP)signalvalueoperatingasdesigned.Thistestdoesnot
givepassorfailresults.ItonlyallowstheusertovalidatetheIMPsignalvalueunderload.AcceleratorPedal
Position1(APP1)signalvaluemustbe99.6%tosuccessfullyreachpeakboostduringthistest.LowIMP
canbetheresultoflowInjectionControlPressure(ICP).DiagnoselowICPconcernsbeforediagnosing
lowIMPconcerns.
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