DIAGNOSTICMANUAL
DieselOxidationCatalyst
(DOC)
ADOCispartofthedieselexhaustAftertreatmentsystem.DOCsaredevicesthatuseachemicalprocess
tobreakdownpollutantsintheexhauststreamintolessharmfulcomponents.Morespecically,DOCs
utilizeraremetalssuchaspalladiumandplatinumtoreducehydrocarbonbasedSolubleOrganicFraction
(SOF)andcarbonmonoxidecontentofdieselexhaustbysimpleoxidation.TheDOCcanbeusedduringan
activeregenerationtocreatehigherexhausttemperatures,therebyreducingsootintheDPF.
DigitalMultimeter(DMM)
Anelectronicmeterthatusesadigitaldisplaytoindicateameasuredvalue.Preferredforuseon
microprocessorsystemsbecauseithasaveryhighinternalimpedanceandwillnotloaddownthecircuit
beingmeasured.
Displacement
Thestrokeofthepistonmultipliedbytheareaofthecylinderboremultipliedbythenumberofcylindersin
theengine.
DownStreamInjection(DSI)
TheDSIsysteminjectsfuelintotheexhaustsystemtoincreasetemperatureoftheexhaustgases,andis
necessaryforDPFregeneration.
DualStageTurbocharger
Anassemblyoftwoturbochargers(low-pressureandhigh-pressure)inseriestoprovideawiderangeof
chargeairpressuresefciently.
Dutycycle
Acontrolsignalthathasacontrolledon/offtimemeasurementfrom0to100%.Normallyusedtocontrol
solenoids.
EGRCooler
Acoolerthatallowsheattodissipatefromtheexhaustgassesbeforetheyentertheintakemanifold.
EngineBackPressureValve
(EBPV)
TheECMcommandstheEBPVtocontroltheExhaustBrake.
EngineCompressionBrake
(ECB)valve
TheECBvalvecontrolspressureenteringthebrakeoilgalleryfromthehigh-pressureoilrailgallery.This
activatesthebrakeactuatorpistonsandopenstheexhaustvalves.
EngineCompressionBrake1
(ECB1)solenoid
TheECB1solenoidcontrolspressureenteringthebrakeoilgalleryfromthehigh-pressureoilrailgallery.
EngineCompressionBrake2
(ECB2)solenoid
TheECB2solenoidcontrolspressureenteringthebrakeoilgalleryfromthehigh-pressureoilrailgallery.
EngineCompressionBrake
Pressure(ECBP)sensor
Ahigh-pressuresensorthatprovidesafeedbacksignaltotheECMindicatingbrakecontrolpressure.
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