Navistar MaxxForce 9 Diagnostic Manual

DIAGNOSTICMANUAL
Step
ActionDecision
2
DetermineifengineorAftertreatmentsystemwarninglampsareilluminated.
Key-OnEngine-Off(KOEO),checkInstrumentPanel(IP)forthefollowing
warninglamps:
•AmberWarningLamp(AWL)
•RedStopLamp(RSL)
•MalfunctionIndicatorLamp(MIL)
•DieselParticulateFilter(DPF)Lamp
Areanyoftheabovewarninglampsilluminated?
Yes:Gotostep4
No:Gotostep3
Step
ActionDecision
3
DieselParticulateFilter(DPF)SnapAccelerationT est(QuickT est).This
procedurecheckstheDPFforcracksorinternaldamagewithoutremoving
theDPFfromthevehicleandisusedtotestbasicfunctionalityofthediesel
particulatelter.ThisistobedonepriortoremovingtheDPF .
1.Thetransmissionmustbeinneutralandtheparkingbrake
applied.
2.Startandidletheengine.
3.Rapidlysnaptheacceleratorpedalfromidletofullthrottle.This
canbeperformedmultipletimes.
4.Duringtheengineaccelerations,visuallycheckforaheavy
blacksmokeexitingtheexhaustpipe.
Isblacksmokevisible?
Yes:Goto
symptom5
(MediumDuty):
Blacksmokepage
44.
No:Goto
Symptom1
(MediumDuty):
FrequentParked
RegenswithNo
ActiveCodes
(Morethanone
parkedregenper
day)page8.
6
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Navistar MaxxForce 9 Specifications

General

Brand	Navistar
Model	MaxxForce 9
Category	Engine
Language	English