Navistar MaxxForce 9

DIAGNOSTICMANUAL
OperationalChecks–StartAftertreatmentDiagnosticsHere
Step
ActionDecision
1
Verifythefollowingenginesystemsareinsatisfactorycondition:
•EngineOil:Parkvehicleonlevelgroundandcheckoil
level.
•EngineCoolantLevel:Checkcoolantlevelthatis
indicatedondeaerationtank.
•IntakeAir:Inspectairltergauge,locatedonairlter
housingordashboard.
•ElectricalSystem:Inspectbatteriesandelectrical
system(engineandvehicle)forpoororlooseconnections,
corrodedterminals,orbrokenanddamagedwires.
•ExhaustSystem:CheckAftertreatmentandexhaust
systemfordamage,excessivecorrosion,orleaks.
•Fuellevel:Checkinstrumentpanelfuelgauge,lookinto
fueltankstoverifyfuellevel,andmakesurefuellevelsare
equalinbothtanks.
•FuelqualityObtainafuelsample,andcheckforwater,
waxing,icing,sediment,gasoline,DieselExhaustFluid
(DEF),orkerosene.
•Fuellineroutingandcondition:WithengineOFF ,
visuallyinspecttheconditionandroutingoffuellines.
Arealloftheaboveenginesystemsoperatingasdesigned?
Yes:Gotostep2
No:Repairappropriateengine
systemandthengotostep2.
Step
ActionDecision
2
DetermineifengineorAftertreatmentsystemwarninglamps
areilluminated.Key-OnEngine-Off(KOEO),checkInstrument
Panel(IP)forthefollowingwarninglamps:
•AmberWarningLamp(AWL)
•RedStopLamp(RSL)
•MalfunctionIndicatorLamp(MIL)
•DieselParticulateFilter(DPF)Lamp
Areanyoftheabovewarninglampsilluminated?
Yes:Gotostep4
No:Gotostep3
80
https://www.truck-manuals.net/