Service Manual

Canbus
ThemachinecontrollerscommunicatewitheachotheronaControllerArea
Network(CAN)bussystem.Usingthisnetworkallowsfullintegrationofallthe
differentelectricalcomponentsofthemachine,allowingthemtooperatetogether
asone.Twospeciallydesigned,twistedwiresformtheCANbus.Thesewires
providethedatapathwaysbetweenthecomponentsonthenetwork.The
engineeringtermforthesecablesareCANHighandCANLow.TheCANbus
wiresareeitherred/whiteoryellow(CAN-High)andeitherblack/whiteorgreen
(CANLow).AteachendoftheCANbusisa120ohmterminationresistor;refer
toCANbusT erminatorResistors(page5–27).
Thecanbusisincorporatedintothemachinewireharnessofallmodel44552,
44552TE,44553,and44554machines.Onlymachineswithwirelessremote
control(model44552.44552TE,and44553)havecomponentsthatusethe
CANbusforcommunication.
TestingtheCANbus
g278232
Figure17
1.Machinecontroltower
3.T oroDIAGconnector
2.Connectorcover
1.MakesurethatkeyswitchisOFFandkeyisremovedfromswitch.
2.TheT oroDIAGconnectorispartoftheCANbusandislocatedontheleft
sideofthemachinecontroltower.
3.LocatetheToroDIAGconnectorandremoveitfromtheconnectorcover.
4.Useamultimeter(ohmssetting)tomeasuretheresistanceacrossterminals
AandB.
•Areadingof54to66ohmsindicatestheCANbusisintact.
•Areadingof120ohmsindicatesoneoftheCANbusterminatorresistors
isnotconnected,damaged,ortheCANbuswiringisdamaged;referto
CANbusTerminatorResistors(page5–27)and/orAppendixA(pageA–1).
5.InstalltheT oroDIAGconnectoraftertesting.
ProForce®DebrisBlower
Page5–11
ElectricalSystem:TestingtheElectricalComponents
18237SLRevB