Navistar MaxxForce 9

DIAGNOSTICMANUAL
Step
ActionDecision
7
CheckforafailedAirManagementSystem(AMS)actuator.
1.UsingElectronicServiceTool(EST)with
ServiceMaxx™software,gotoT ests>Load
TestSpecicSessionandverifyLoadTest
SpecicSessionisunchecked.
2.GotoSessions>Performanceandselectthe
recordsnapshoticonfromthetoolbar.
3.GotoTests>KOERTests>AirManagement
Test.
WhenAirManagementTestiscomplete,stoprecording.
UsetheplaybackfeatureinServiceMaxx™,andgraphthe
followingsignalvalues:
SignalValues:
•EngineSpeed
•IntakeManifoldPressure(IMP)
•Turbocharger2WastegateControl(TC2WC)
DoessnapshotmatchGraph1orGraph2page120?
Graph1:Gotostep8A
Graph2:Diagnoseandrepairfailed
actuator(SeePerformanceDiagnostics
sectioninEngineDiagnosticManual).
Afterrepairsarecomplete,retestfor
originalproblem.
98
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