Navistar MaxxForce 7

SECTION1–ENGINESYSTEMS
EngineFeatures(cont.)
FastIdleAdvance
Fastidleadvanceincreasesengineidlespeedforfaster
warm-uptooperatingtemperature.ThisoccurswhentheECM
monitorsEngineCoolantT emperature(ECT)sensorinputand
adjustsfuelinjectoroperationaccordingly.
LowidlespeedisincreasedproportionallywhentheECTis
below104°F(40°C)at700rpmtobelow32°F(0°C)at900rpm
maximum.
ServiceDiagnostics
TheElectronicServiceT ool(EST)communicateswiththecontrol
systemthroughthepublicControllerAreaNetwork(CAN).The
ESTallowstheusertoretrieveandclearfaultcodes,runspecial
diagnosticstests,monitorcontrolsystemsensorsandactuators,
updatecontrolsystemsoftware,andadjustspecialfeatures.
ServiceInterval
Theserviceintervalfeatureisdesignedtoprovideavisual
remindertotheoperatorthattheengineoilchangeinterval
hasexpiredandroutinemaintenanceproceduresshouldbe
performed.
Theterm“interval”inthiscaseisusedtodescribethedistance,
time,orfuelusedbetweenthelastmaintenanceperformedon
thevehicleandthenextmaintenancethatisdue.
Itisessentialthatoperatorsaretrainedtoknowthemaintenance
schedulesandinstructionsregardingtheoperationandreset
functionalityoftheserviceintervalforthefeaturetobeeffective.
ForfurtherinformationseeResettingChangeEngineOilService
IntervalMessage(page76).
EngineOptionalFeatures
CruiseControlwithHardwireCruiseSwitches
TheEngineControlModule(ECM)controlsthecruisecontrol
feature.Thecruisecontrolsystemfunctionssimilarlyforall
electronicengines.Maximumandminimumallowablecruise
controlspeedswillvarybasedonapplication.T ooperatecruise
control,seeappropriateVehicleOperatorManual.
EngineFanControl
Theenginefancontrolcommandshigherairowthroughthe
radiatorwhentheAirConditioner(A/C)isonorwhenthecoolant
orinletairtemperaturegoesaboveasettemperature.
EngineAssistedWindshieldDefrost(EAWD)
EAWDisanautomatedfeaturethatassistswindshielddefrosting
duringcoldambienttemperaturesbyincreasingenginerpmto
heatuptheenginefaster.
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