Allison Transmission 4000 EVS

9.0EXTERNALWIREHARNESSES,
VEHICLEINTERFACEMODULE,AND
RETARDERCONTROLS
9.1WIREHARNESSES
NOTE:Theexternalharnessconnectingtransmissioncontrolsis
partofthevehiclechassisharnessandtypicallywillnothavean
AllisonTransmissionpartnumber.Theharnesspartsareusually
onlyavailablethroughthevehiclemanufacturerandtheirvendors.
CheckwiththeOEMordealerrsttodeterminetheirwireharness
servicepartsavailability.AnyAllisondistributorordealercanassist
withdeterminingserviceabilityoftheexternalharnessaswell.The
internaltransmissionharnessinsidethetransmissionisanAllison
partandonlyavailablefromanAllisondistributorordealer.
Thetransmissioncontrolsrequiretheuseofwiringharnessestoconnectthe
varioussystemcomponents,including:
•TransmissionControlModule(TCM)
•Mainconnectoronthetransmission
•Enginespeedsensor
•Turbineshaftspeedsensor(4000Series)
•Outputshaftspeedsensor
•Serialcommunicationdatalink
•Shiftselector
•Diagnosticconnector
•Retardercontrols(ifequipped)
•Vehicleinterfacewiring
•ThrottlePositionSensor(TPS)(onlywithmechanicallycontrolled
engines)
•OptionalVehicleInterfaceModule(VIM)
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