DIAGNOSTICMANUAL
Regeneration
Oxidationofaccumulatedsoot(carbon-basedparticulates)intheDieselParticulateFilter(DPF).Thesootis
reducedtoashandstoredinthePDF .
ServiceMaxx™software
Diagnosticssoftwareforenginecomponentsandsystems.
Signalground
ThecommongroundwiretotheECMforthesensors.
Strategy
Aplanorsetofoperatinginstructionsthatthemicroprocessorfollowsforadesiredgoal.Strategyisthe
computerprogramitself,includingallequationsanddecisionmakinglogic.Strategyisalwaysstoredin
ROMandcannotbechangedduringcalibration.
Stroke
ThemovementofthepistonfromT opDeadCenter(TDC)toBottomDeadCenter(BDC).
SuspectParameterNumber
(SPN)
A19-bitnumberusedtoidentifytheitemforwhichdiagnosticsarebeingreported.TheSPNisusedfor
multiplepurposes,somethatarespecictodiagnosticsareasfollows;
•Identifytheleastrepairablesubsystemthathasfailed.
•Identifysubsystemsorassembliesthatmaynothavehardfailuresbutmaybeexhibitingabnormal
operatingperformance.
•Identifyaparticulareventorconditionthatwillbereported.
•Reportacomponentandnon-standardfailuremode.
Tachometeroutputsignal
Enginespeedsignalforremotetachometers.
Thermistor
Asemiconductordevice.Asensingelementthatchangesresistanceasthetemperaturechanges.
ThermistorSensor
Changeselectricalresistancewithchangesintemperature.Resistanceinthethermistordecreasesas
temperatureincreases,andincreasesastemperaturedecreases.Thermistorsworkwitharesistorthat
limitscurrenttoFormavoltagesignalmatchedwithatemperaturevalue.
Thrustload
Athrustloadpushesorreactsthroughabearinginadirectionparalleltotheshaft.
TopDeadCenter(TDC)
Theuppermostpositionofthepistonduringthestroke.
Torque
Aforcehavingatwistingorturningeffect.Forasingleforce,thecrossproductofavectorfromsome
referencepointtothepointofapplicationoftheforcewithintheforceitself.Alsoknownasmomentofforce
orrotationmoment.T orqueisameasureoftheabilityofanenginetodowork.
191
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