Navistar International LT Series - Electrical Load Control and Shedding (ELCS); Engine

Operation
Thefuseblockislocatedonthepassenger-sideunderneatha
removablepanelintheinstrumentpanel(gloveboxarea).To
accessthefuseblocklocatethetabonthepanelandpullupto
releasetheretainingclips.
•Electricalcircuitsareprotectedbytheelectricalsystem
controller,circuitbreakers,fuses,orfusiblelinks.Forthe
sizeandlocationofcircuitbreakers,fusesandfusible
links,pleaserefertotheMaintenanceIntervalsand
Specicationssectionofthismanual.
•Fusiblelinksconsistofalengthoflightergaugewirein
acircuit.Incaseofashortoroverload,thefusiblelink
opens(burnsout)toprotecttheremainderofthecircuit.
Repairconsistsofinstallinganewfusiblelinkwiththe
samegaugewireastheopenedfusiblelink.
•Circuitbreakersinterruptthecircuitwhenanoverload
orshortoccurs.Manualcircuitbreakers(TypeIII)can
beresetbydepressingtheresetbuttononthebreaker.
HeadlightandwipercircuitsareprotectedbytheBody
Controller.TypeIIcircuitbreakerswillresetautomatically
iftheshortisremovedfromthecircuit.
•Thevariouselectricalunitsinthecabandengine
compartmentsareprotectedbyeitherfusesorcircuit
breakers.Thepowerdistributioncenterislocated
withintheinstrumentpanel(gloveboxarea)onthe
passenger-sideofthevehicle.
ElectricalLoadControlandShedding(ELCS)
ElectricalLoadControlandShedding(ELCS)isanoptional
feature(standardwithsleepers)intendedtoprovidea
convenientmeansofautomaticallyshuttingdownelectrical
loadsovernightinordertoconserveenergyanddeliversufcient
powertostarttheengine.Thesystemisactivewhentheengine
isnotrunning,regardlessofkeystate.TheELCSsystemdoes
notincludeprovisionsforshuttingdown120voltsaccircuits.
TheELCSwillbeginasequenceofeventswhenthemeasured
batteryvoltageisatorbelow12.1voltsdcforaperiodof30
seconds.Thesequenceofeventswillrststartwithproviding
thevisualalertLOADSHEDDINGtothevehicleoperatorfor
atleast30seconds.Anaudiblealert,whichconsistsofa
continuoustonegreaterthan3secondsandlessthan6seconds
induration,willcoincidewiththestartofthevisualalert.
Theaudiblealertcanbedisabledbyavehiclemaintainerif
desired.Thesequencewillthendisableapredenedgroup
offeatures/electricalloads.Thesewillremaindisableduntil
thevehicle'skeyswitchtransitionstotheAccessoryorON
positions,andthemeasuredvoltageisabove12.1voltsdc.
Engine
Theengineforthisvehicleisanelectronicallycontrolleddiesel
engine.AseparateEngineControlModule(ECM)monitorsand
controlsallenginefunctions.ThisECMalsocommunicateswith
thebodyelectricalsystemwhichwillgenerateoractivatethe
necessarywarningindicatorstoalertthedriverofout-of-range
operatingconditions.
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