Navistar N10

1DIAGNOSTICTROUBLESHOOTINGPROCEDURES23
OperationalCheckoutProcedures
1.0-PreliminaryVehicleOperationalCheckoutProcedure
Step1Inspectfuellevel,quality,andfuelsystem.Decision
PerformFuelLevelInspection(page2352),FuelSystemInspection(page2349),and
FuelQualityInspection(page2350).
Arefuellevelandqualitytospecication,anddidfuelsystempassinspection?
Yes:GotoStep2.
No:Repairfuelsystemfault.
AfterrepairsareOperational
CheckoutProcedures
complete,retestfororiginal
problem.
Step2Inspectbatteries,electricalsystem,andconnections.Decision
PerformBatteriesandElectricalSystemInspection(page2393).
Arebatteries,electricalsystem,andconnectionsingoodcondition,tight,not
corroded,andisbatteryvoltageinspecication?
Yes:GotoStep3.
No:Repairbroken,loose,or
corrodedelectricalsystem
connectionsorcomponents.
Chargebatteriesto12.6
volts.Afterrepairsare
complete,retestfororiginal
problem.
Step3Inspectairintakesystemfordamageorrestrictions.Decision
InspectChargeAirCooler(CAC),EngineThrottleValve(ETV),MassAirFlow
(MAF)sensor,airlter,intakepiping,clamps,andconnectionsfordamageor
restrictions.
Areairintakesystemcomponentsdamagedorrestricted?
Yes:Repairairintake
systemdamageor
restrictions.Afterrepairsare
complete,retestfororiginal
problem.
No:GotoStep4.
Step4Inspectexhaustsystemfordamageorrestrictions.Decision
InspectDieselOxidationCatalyst(DOC),DieselParticulateFilter(DPF),
SelectiveCatalystReduction(SCR)catalyst,exhaustbrake,andexhaust
pipingfordamageorrestrictions.
Areexhaustsystemcomponentsdamagedorrestricted?
Yes:Repairexhaustsystem
damageorrestrictions.After
repairsarecomplete,retest
fororiginalproblem.
No:GotoStep5.