Toro Groundsmaster 4500-D Series - Can−Bus Termination Resistor

CAN−busTerminationResistor
Termination
A
B
C
Resistor
g276034
Figure222
SystemcommunicationbetweenelectricalcomponentsonGroundsmaster
4500−Dand4700−DmachinesisaccomplishedonaCAN−buscommunication
system.Two(2)speciallydesigned,twistedcablesformthebusforthenetwork
usedonthemachine.Thesewiresprovidethedatapathwaysbetweenmachine
components.AttheendofthetwistedpairofbuscablesneartheInfoCenter
displayisa120ohmterminationresistor.
TheCAN−busterminationresistorplugsintotheplatformwireharnessinthe
consolearm.Theresistorcanbeaccessedbyremovingthecoverplateonthe
rightsideoftheconsolearm.Thewireharnessconnectorhasablueinsertto
identifytheproperlocationfortheterminationresistor.
Note:TheGroundsmaster4500−Dand4700−DengineECUincludesthe
secondCAN−bussystemterminationresistor.Thisresistorcannotbeaccessed
fortesting.
Note:RefertoAppendixA(pageA–1)foradditionalinformationontermination
resistorlocationandwireconnections.
IMPORTANT
Theterminationresistorisrequiredforproperelectricalsystem
operation.
TerminationResistorTest
Theterminationresistor(Figure222)canbetestedusingadigitalmultimeter
(ohmssetting).Thereshouldbe120ohmsresistancebetweenterminalsAandB
oftheterminationresistor.ThereisnotaterminalincavityConGroundsmaster
4500−Dand4700−Dmachines.
ElectricalSystem:ComponentTesting
Page6–62
Groundsmaster
®
4500-D/4700-D
19245SLRevA