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AllwiringharnessesandconnectorswhichmatetoAllison

connectors/componentsaretypicallysuppliedandinstalledbythevehicle

manufacturer.Harnessesmayconsistofasinglepiece,ormaybedivided

intomultiplesegmentsjoinedbybulkheadconnectors.

9.2VEHICLEINTERFACEMODULE(VIM)

TheVIMcontainsrelaysandfusesnecessarytointerfacethetransmission

controlswiththevehiclewiringsystem.WhenorderingtheVIM,specify12or

24voltstoproperlymatchthevehicleelectricalsystem.

Insomecases,theOEMorbodybuildermaychoosenottousetheAllison

VIM.Inthesecases,theOEMmustspecifyandinstallcomponentswhich

provideaproperinterfacebetweenvehiclewiringandthetransmission

controlsystem.

9.3RETARDERCONTROLS

Inordertomeettheneedsofoperatorsinawidevarietyofapplications,

vocations,andvehiclecongurations,severalretarderapplysystemsare

offeredfortransmissionmodelsintheAllisonTransmission3000and4000

Series.

Certaintypesofapplysystemsmaynotberecommendedforspecic

vocations.Forexample,factorssuchasretarderperformancethatmaynotbe

appropriatefortheclassorvehicletypeordifcultyininstallation.However,

therearetypicallytwoormoreapplytypesavailableformostvehicles.

Inadditiontothestandardanalogcontrolsapproach,thepossibleintegration

oftheretarderwithnumerousothervehiclesystemsthroughacommonSAE

J1939-basedvehiclecontrollercreatesadditionaldesignexibilitywhen

determiningmethodsofpotentialoperatorcontrolofthetransmissionretarder.

TheTransmissionControlModule(TCM)mustbecalibratedtotheproper

methodtoensuredesiredretarderoperation.Operatorcontrolsoftheretarder

canbeaccomplishedbyeitherofthefollowingmethods:

•BothAnalogandJ1939.InputisbasedonaRetarderEnableswitch

foractivation,plusoneormoreAllisonRetarderModulationRequest

(RMR)componentstoselectthedesiredlevelofretardation.Inaddition,

retardationisrequestedorlimitedbasedonmessagesfromanSAE

J1939-basedvehiclecontroller.

•J1939Only.Retardationisrequestedorlimitedbasedonmessages

fromanSAEJ1939-basedvehiclecontroller.

Theanalogcomponentsthatcanbeusedwiththe3000and4000Series

retarderareavailablefromAllisonTransmission.Thesecomponentsprovide

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