Mack V-MAC IV - Cruise N Brake Engagement Delay; Engine High Idle Speed if Stopped; Engine High Idle Speed in Upper Gears

V-MACCo-PilotOperator'sManual63
Tochangeoperatingparameters,acomputerisusedandrequiresthatitisrunning
theVCADSsoftware.Inaddition,adatalinkadapterisalsorequiredasaninterface
betweenthescantoolandthevehiclemanagementandcontrol(V-MAC)IVsystem.
Note:Ifthereartiresizesarechanged,ortherearaxleratiosarechanged,youmust
contactyourlocalMACKTRUCKSdealer.FailuretonotifyyourlocalMACK
TRUCKSdealerofthesechangesmaycauseinaccuratespeedometerreadings.
Cruise'NBrakeEngagementDelay
Withthecruise'nbrakeengagementdelayfeature,engagementoftheenginespeed
(RPM)isdelayedincruisecontroltoreduceenginebrakecycling.Thebrakewill
engage3.2km/h(2mi/h)abovethecruisesetspeed.Theenginebrakeoperates
normallywhencruiseisnotbeingused.
EngineHighIdleSpeedifStopped
Maximumenginespeed(rpm)canbeadjustedbyusingVCADSsoftware.The
possiblehighidlesettingsrangefrom600to2,600RPM.However,theenginespeed
willnotgobelowlowidleandwillnotexceedtheOEMhighidle(usually2,100or
2,150RPM).
EngineHighIdleSpeedinUpperGears
SetsthemaximumengineRPMifthegearratioislessthan1.5.Thisfeatureis
intendedtoimprovefueleconomybylimitingefcienthighspeedengineoperation.
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