Navistar MaxxForce 9

DIAGNOSTICMANUAL
34801AFTFP1toolowwhiledosing•FDPbelowminimum
•Dirtyfuellter
•StuckclosedAFTShutoffvalve
•FuelLeakinDownStreamInjection(DSI)
System
3481
7
Incorrectdosingpressure,multiple
events
•FDPabovemaximum
•Restrictedfuelreturnlinebetweenlter
housingandfueltank
35560
AFTfuelpressure2excessivelyhigh
(Restrictedinjection)
•AftertreatmentFuelInjector(AFI)is
pluggedorsticking
35561
AFTfuelpressure2belowdesired•LeakinDSIsystem
•AFTFuelDoserstickingOpen
•AFIstuckOpen
3556
7
AFTFuelInjectornotrespondingas
expected
•DSIfailedsystemvalidationcycle
•BiasedAFTFISorcircuit
•BiasedAftertreatmentFuelPressure2
(AFTFP2)sensororcircuit
•FailedAFTFDorcircuit
•FailedAFTFSVorcircuit
•AftertreatmentFuelInjector(AFI)failure
(plugged)
37190
DPFSootLoad-Highest(level3/3)
•HighDPFsootlevel
•LowFuelDeliveryPressure
•RestrictedAFIunit
•ParkedRegenInhibited
•Exhaustleak(s)
•BiasedDPFDPsensor
•BiasedIMPsensor
•Lowboostpressure
371915
DPFSootLoad-Lowest(level1/3)
•Level1DPFregenrequired
371916
DPFSootLoad-Moderate(level
2/3)
•Level2DPFregenrequired
148
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