Toro Groundmaster Series - Throttle Switch (Model 31902 and 31903)

ThrottleSwitch(Model31902and31903)
POSITIONCLOSED
CIRCUITS
INCREASE
SPEED
2+3,5+6
NEUTRAL
NONE
DECREASE
SPEED
2+1,5+4
Thethrottleswitchislocatedontheoperator’sconsole.Whenthefrontofthe
switchisdepressed,theenginespeed(RPM)willincrease.Whentherearofthe
switchisdepressed,theenginespeed(RPM)willdecrease.Refertotheengine
specicationtablesinChapter2(page2–1)fortheminimumandmaximum
engineRPMforspecicGroundsmaster3200/3300/3310machines.
TheTDMdisplay/controllermonitorssignalsfromthethrottleswitch.TheTDM
displaycontrollercommunicatestheincrease/decreaserequeststotheYanmar
engineECUviatheCANnetwork.
TestingtheThrottleSwitch
ThethrottleswitchanditscircuitwiringcanbetestedusingtheTDM
display/controller;refertoUsingtheTDMDisplay/ControllerScreensfor
Troubleshooting(page3–12).Iftestingdeterminesthattheswitchandcircuit
wiringarenotfunctioningcorrectly,proceedwiththefollowingtestprocedure:
1.Parkthemachineonalevelsurface,lowerthecuttingunit(orattachment),
engagetheparkingbrake,setthekeyswitchtotheOFFpositionandremove
thekeyfromthekeyswitch.
2.Disconnectthebatterynegative(-)cableatthebattery;refertoRemoving
andInstallingtheBattery(page6–64).
3.Removetheoperator’sconsolecovers;refertoRemovingandInstallingthe
Operator’sConsoleCovers(page7–23).
4.Disconnectthewireharnessconnectorfromtheswitchandremovethe
switchfromtheconsoleifnecessary.Checktheswitchandtheharness
connectorfordamageorcorrosionandcleanorrepairifnecessary.
5.Useamultimeter(ohmssetting)andtheprecedingtabletodetermine
whethercontinuityexistsbetweenthevariousterminalsforeachswitch
position.
6.Replacetheswitchifnecessary.
7.Iftheswitchtestscorrectlyandacircuitproblemstillexists,checkthewire
harnesses;refertoAppendixA(pageA–1).
8.Installtheswitchandconnectthewireharnessaftertesting.
9.Installtheconsolecovers.
10.Connectthebatterynegative(-)cableatthebattery.
ElectricalSystem:TestingtheElectricalComponents
Page6–26
Groundsmaster
®
3200,3300and3310
19240SLRevA