Toro Pro Force 44552 - CAN Bus Terminator Resistors

CANbusTerminatorResistors
g223018
Figure31
1.CAN-busterminatorresistor
2.Keyway
ThesystemcommunicationbetweentheelectricalcomponentsontheProForce
DebrisBlowerisaccomplishedonaCANbuscommunicationsystem.The2
speciallydesigned,twistedcablesformthebusforthenetworkareusedon
themachine.Thesewiresprovidethedatapathwaysbetweenthemachine
components.TheengineeringtermforthesecablesareCANHighandCAN
Low.TheCANbuswiresareeitherred/whiteoryellow(CANHigh)andeither
black/whiteorgreen(CANLow).A120ohmterminationresistorislocatedat
eachendoftheCAN–bus.
Thecanbusisincorporatedintothemachinewireharnessofallmodel44552,
44552TE,44553,and44554machines.Onlymachineswithwirelessremote
control(model44552,44552TE,and44553)havecomponentsthatusethe
CANbusforcommunication.
Oneoftheresistorsissecuredtothemachinewireharnessnearthestarted
motor,andoneoftheresistorsissecuredtothemachinewireharnessnearthe
keyswitchinthecontroltower(batteryremovalmaybenecessarytoaccess
theresister).
RefertotheElectricalSchematicsandWireHarnessDrawings/Diagramsin
AppendixA(pageA–1)foradditionalinformationonthelocationoftheterminator
resistorandwireconnections.
Theinsulatorwedgeintheterminatorresistorisblueforidenticationpurposes.
Thereisalsoacenterkeywaytopreventtheterminatorresistorfrombeing
pluggedintothewrongwireharnessconnector.
IMPORTANT
Bothterminatorresistorsarerequiredforproperelectricalsystem
operation.
TestingtheCANbusTerminatorResistor
1.MakesurethatkeyswitchisOFFandkeyisremovedfromtheswitch.
2.Unplugtheresistorfromthewireharness.
3.Useadigitalmultimeter(ohmssetting)tomeasuretheresistancevaluefor
theCANbusterminatorresistor.Thereshouldbe120ohmsresistance
betweentheterminalsAandB.TheterminalCisnotused.
4.Replacetheresistorifnecessary.
ProForce®DebrisBlower
Page5–27
ElectricalSystem:TestingtheElectricalComponents
18237SLRevA