Toro 74946, 74947, 74969 Software Guide

FormNo.3417-740RevA

HorizonControlModule

ForZMasterLawnMowers

ModelNo.74946—SerialNo.402000000andUp

ModelNo.74947—SerialNo.40200000andUp

ModelNo.74969—SerialNo.400000000andUp

SoftwareGuide

Readthisinformationcarefullytolearnhowtooperateandmaintainyourproductproperlyandtoavoidinjury
andproductdamage.Youareresponsibleforoperatingtheproductproperlyandsafely.ReadyourOperator’s
Manualformoreinformation.

WARNING

CALIFORNIA

Proposition65Warning

ThisproductcontainsachemicalorchemicalsknowntotheStateofCalifornia

tocausecancer,birthdefects,orreproductiveharm.

ScreenIcons

Theinformationscreenusesthefollowingicons:

GaugeandMeters

AdvancedSettings

MaintenanceandService

TransmissionOilMaintenance

Engine-OilTemperature

LowEngineSpeed

Processing

BatteryV oltage

EngineHours

©2017—TheToro®Company
8111LyndaleAvenueSouth
Bloomington,MN55420

FuelLevel

Registeratwww.Toro.com.

EngineOilMaintenance

OriginalInstructions(EN)

PrintedintheUSA

AllRightsReserved

Cancel/Exit

*3417-740*A

No

PTO

*Locatedonbottomrowofsome

menuscreens

ToggleBetweenScreens

Parkingbrake

NeutralLock

*LocatedintoprowofInformationScreen

OPC(OperatorPresenceControl)

MaximumEngineSpeed

Yes

Decrease

Increase

Play/Start

Enter/Return

Previous

Next

Reset

EfcientEngineSpeed

Hydraulic-FluidTemperature

Pause/Stop

RecommendedEngineCoolDownTime

2

ErrorWarning

ShutOffEngine

ProductOverview

1.LDU(LogicDisplayUnit)

2.MCU(MasterControlUnit)

Figure1

LEDStatusLight

TheLEDstatuslightismulti-coloredtoindicatethe
systemstatusandislocatedontherightsideofthe
panel.Duringstartup,theLEDilluminatesred,then
orange,thengreentoverifyfunctionality.

•SolidGreen:indicatesnormaloperatingactivity.

•BlinkingRed:indicatesthatafaultisactive.

•BlinkingGreenandOrange:indicatesthata

clutchresetisrequired.

Buttons

g229466

3.Alarm

Themulti-functionalbuttonsarelocatedatthebottom
ofthepanel.Theiconsdisplayedontheinformation
screenabovethebuttonsindicatethecurrentfunction.
Thebuttonsallowyoutoselecttheenginespeedand
navigatethroughsystemmenus.

Alarm

Ifanerroroccurs,anerrormessagedisplays,theLED
turnsred,andthealarmsoundsaudiblyasfollows:

1.Screen

2.LEDstatuslight

Screen

Figure2

LDU(LogicDisplayUnit)

•Afastchirpsoundindicatescriticalerrors.

•Aslowchirpingsoundindicateslesscriticalerrors,

suchasrequiredmaintenanceorserviceintervals.

Note:Duringstartup,thealarmsoundsbrieyto

verifyfunctionality.

InformationScreens

Themaininformationscreensareasfollows:

•StartupScreen(page3)

g228164

3.Buttons

•Engine-OffScreen(page4)

•Engine-OnScreen(page4)

StartupScreen

Duringstartup,thescreendisplaysastartupgraphic
for1second,soundsthealarm,andilluminatesthe
LED,changingfromredtoorangetogreen.

Thescreendisplaysiconsandinformationrelativeto
machineoperationandisbacklitforviewinginlowlight
situations.Thescreenislocatedabovethebuttons.

RefertotheScreenIcons(page1)sectionforicon
descriptions.

3

EngineScreens

Engine-OffScreen

Whenthekeyisonwithouttheenginerunning,the
Engine-Offscreendisplays(Figure3).

EngineSpeedMode

3modesareavailable:LOW,EFFICIENT,andMAXIMUM.

•LOW:Lowtransportspeed/Lowidleforreducing

deckpackinginwetmowingconditions.

•EFFICIENT:Mediumtransportspeedandmaximum

fueleconomyandnormalmowingconditions.

•MAX:Maximumtransportspeed/Highidlefor

extrememowingconditions.

Thepanelilluminatesshowingthecurrentengine
speedmode(LowisselectedinFigure4).

Figure3

1.Hoursremaininguntiltransmissionuidmaintenanceis
required

2.Batteryvoltagedisplay

3.Safetyinterlockstatusindicators

4.Fuel-levelgauge(iffuelsenderisavailable)

5.Screentogglesbetweenhoursremaininguntilengineoil
maintenanceandnon-resettableenginehourcounter

Engine-OnScreen

Whentheengineisrunning,theEngine-Onscreen
displays(Figure4).

g030172

SafetyInterlockStatusIndicators

Theseilluminatewheneachcontrolisinthestarting
position(i.e.,PTOdisengaged,parkingbrake
engaged,motion-controlleversintheNEUTRAL-LOCK
position,andtheoperatorispresent).

•ThePTOmustbedisengaged,brakeengaged,

andmotion-controlleversout(NEUTRAL-LOCK
position)tostarttheengine.(Youdonotneedto
beintheseattostarttheengine.)

Note:ThestartercrankswiththePTOswitchin

theON(pulledup)position;however,thesystem
disengagesthePTOandaPTOreseterroroccurs.
EngagingthePTOrequiresyoutoresetthePTO
switchbyturningitOFF(pusheddown)andON.

•YoumustbeintheseatwhilethePTOisengaged,

theparkingbrakemustbedisengaged,orthe
motion-controlleversmustbemovedinward;
otherwise,theengineshutsoff.

•Theengineshutsoffifeithertheleft,theright,

orbothleversaremovedfromNEUTRAL-LOCK
positionwhiletheparkingbrakeisengaged.

Figure4

1.Enginespeedmode4.Enginespeed

2.Safetyinterlockstatus
indicators

3.Enginetemperature

5.Fuellevelgauge(iffuel

Note:RefertothemachineOperator’sManualto

checkthesafetyinterlocksystem.

g030173

EngineTemperature

Abargraphdisplaystheenginetemperature.When
thetemperatureishighandapproachinganoverheat

senderisavailable)

condition,thebargraphashes.Whentheengine
hasoverheated,thebargraphllscompletely .

EngineSpeed

Displaysthespeedoftheengine.

FuelLevel(iffuelsenderisavailable)

Thefuellevelisshownonabardisplay.Anerror
appearswhenthefuellevelislow(approximately1
gallonremaininginthetank).

4

MenuSelectionScreen

TheMenuSelectionScreendisplayswhenyouplace
themotion-controlleversintheNEUTRAL-LOCKposition
andpressandholdthe2outsideLDUbuttons.

Figure5

1.Outsidebuttons

TheMenuSelectionScreenallowsyoutocycle
throughthedifferentmenuoptionsbypressingthe
togglebutton.Whenthedesiredmenuoptionis
highlighted,presstheenterbuttontoselectit.

Note:Allmenuoptionsarelockedifthe

motion-controlleversarenotintheNEUTRAL-LOCK
position.

2.Menuselectionscreen

g038651

Figure6

1.MaintenanceandService4.Cancel/Exit

2.GaugesandMeters

3.AdvancedSettings6.Enter/Return

5.Togglebetweenscreens

MaintenanceandServiceMenu

Youcanscrollbetweenthefollowingscreensinthe
MaintenanceandServicemenu:

•StatusofInputs(page5)

•StatusofOutputs(page6)

g228165

•CurrentErrorMessages(page6)

•HydraulicTransOil(page6)

•EngineOil(page7)

•MachineInformation(page7)

•ModuleInformation(page7)

StatusofInputs

Thisscreenlistsalloftheinputstothesystemand
highlightswhichiscurrentlyactive.Inputswith
numericalvaluesdisplaythecurrentvalue.

Pressandholdthe2outsidebuttonstoreturntothe
defaultscreen.

Themenuselectionscreenallowsyoutocycle
throughthefollowingscreens.

•MaintenanceandServiceMenu(page5)

•GaugesandMetersMenu(page8)

•AdvancedSettingsMenu(page10)

Figure7

1.StatusofInputs

2.PTOSwitch

3.Neutral7.Togglebetweenscreens

4.OilPressure

5.Brake

6.Previous

8.Next

ThefollowingarealistofitemsavailableintheStatus
ofInputsscreen:

•Systemvoltage

•Enginecommunication(highlightsifmoduleis

communicatingwithengineECU)

•PTOswitch(highlightsifOn)

g030183

5

•Fuelsendervoltage(showsvoltage)

•Neutralswitch(highlightsifOn)

•Brakeswitch(highlightsifOn)

•Seatswitch(highlightsifOn)

•Oilpressureswitch(highlightsifOn)

•Enginetemperature(showstemperature)

StatusofOutputs

Thisscreenlistsalloftheoutputsfromthesystem
andhighlightswhichoneiscurrentlyactive.Outputs
withnumericalvaluesdisplaythecurrentvalue.

Figure8

1.StatusofOutputs3.ClutchOutput

2.SpeedSignal

4.EnginePowertoRun

ThefollowingarealistofitemsavailableintheStatus
ofInputsscreen:

•Enginespeedsignalshowsvoltagesignalsent

fromthesystemtotheengineECU(Engine
ControlUnit).

g030185

Figure9

1.CurrentError

2.Errordisplay(e.g.,LowOilPressure)

3.Enginehourswhentheerroroccurred

HydraulicTransOil

Thisservicereminderscreendisplaysthehoursuntil
thehydraulictransmissionoilmaintenanceisdue.

g038556

g030186

Figure10

1.HydraulicTransOil

2.Reminderdisplay

3.Enginehoursremaininguntiltheserviceisdue

•PTOoutput(highlightsifOn)

•Engineshutdownoutput(highlightsifOn)

•Modulecommunication(highlightsifLDUand

MCUarecommunicating)

•Alarm(highlightsifOn)

•Starter(highlightsifOn)

CurrentErrorMessages

Thisscreendisplaysthecurrenterrorastextwiththe
enginehoursatwhichtheerroroccurred.Thetoggle
buttonallowsyoutoscrollbetweenscreensifmultiple
errorsareactive.Ifonly1erroroccurs,thetoggle
buttondoesnotchangescreens.

Pressthetogglebuttontoalsodisplaytheengine
hoursatwhicheveryservicereminderresetwas
performed.

g030187

Figure11

1.HydraulicTransOil

2.ServiceHistorydisplay

3.Servicereminderresetwasperformed(e.g.,250and750
enginehours)

6

EngineOil

MachineInformation

Thisservicereminderscreendisplaysthehoursuntil
theengineoilmaintenanceisdue.

Figure12

1.EngineOil

2.Reminderdisplay

3.Enginehoursremaininguntiltheserviceisdue

Pressthetogglebuttontoalsodisplaytheengine
hoursatwhicheveryservicereminderresetwas
performed.

Thescreendisplaystheserialnumberandmodel
numberofthemachine.

g030188

Figure15

1.MachineInformation3.Serialnumber

2.Modelnumber

g030190

ModuleInformation

Thescreendisplaysthecurrentinstalledversion
ofsoftwareandhardwareforboththeLDU(Logic
DisplayUnit)andtheMCU(MasterControlUnit).
SelectthetogglebuttontoseetheMCUscreen.

Figure13

1.Engineoil

2.ServiceHistorydisplay

3.Servicereminderresetwasperformed(e.g.,250and750
enginehours)

DeckGearBoxOil

ApplicableModelsOnly

ThisscreendisplaysthehoursuntiltheDeckGear
BoxOilmaintenanceisdue.

Figure14

1.DeckGearBoxOil

2.Reminderdisplay

3.Enginehoursremaininguntiltheserviceisdue

g030189

g030191

Figure16

1.ModuleInformation4.SoftwareVersion

2.LDU5.Toggle

3.HardwareVersion

g030192

Figure17

1.ModuleInformation

2.MCU4.SoftwareVersion

g219156

3.HardwareVersion

Toexitthescreen,pressthepreviousornextarrow
keys.Pressingtheenterbuttontakesyoubacktothe
MenuSelectionscreen.

7

1.Exit

2.ExitMenu

Figure18

g030193

g030203

Figure20

3.Enter/Return

1.Reset

2.Areyousure?4.N(no)

3.Y(yes)

GaugesandMetersMenu

Youcanscrollbetweenthefollowingscreensinthe
GaugesandMetersmenu:

•EngineHours(page8)

•PTOHours(page8)

•FuelUsed(page8)

•FuelEconomy(page9)

•TripStatistics(page9)

EngineHours

Thisscreendisplaysanon-resettable,totalengine
hourcounterandresettabletripcounter.

Figure19

1.EngineHours3.Triphours

2.Totalhours4.Resettriphours

PTOHours

Thisscreendisplaysanon-resettable,totalPTOhour
counterandaresettabletripPTOcounter.

g030204

Figure21

1.PTOHours

2.Totalhours4.Resettriphours

3.Triphours

ToresettheTriphourmeter,highlighttheTriphour
meterandpresstheResetbutton;toconrmthe
reset,pressY(yes)orN(no)tocancel(Figure20).

FuelUsed

g030202

ThisscreendisplaysthetotalUSgallons/litersoffuel
usedfromthelasttimeitwasreset.Pressthereset
buttontoresetthefuelusedcounter.

ToresettheTriphourmeter,highlighttheTriphour
meterandpresstheResetbutton;toconrmthe
reset,pressY(yes)orN(no)tocancel(Figure20).

g038362

Figure22

1.FuelUsed3.Reset

2.DisplaysUSgallons/liters
used

8

FuelEconomy

ThisscreendisplaystheUSgallons/litersoffuelused
perenginehour.

g038364

Figure25

Figure23

1.FuelEconomy

2.DisplaysUSgallons/liters
perhour

TripStatistics

Thereare5tripstatisticsscreenstoscrollthoughand
view.

Figure24

1.TripStatistics

Eachscreenfeaturesresettablecountersforthe
followingparameters:EngineHours,PTOHours,and
totalUSgallons/litersoffuelused.

Youcanpauseorstopthecollectionofstatistics
andplayorstartthecollectionoftripstatistics.
Forexample,whenTripStatistics1ispaused,the
statisticsarehighlightedandtheresetbuttonis
available.Pressingtheresetbuttonresetsall3
parameters.Pressingtheplaybuttonstartsdata
collection.

2.Viewtripstatistics

1.TripStatistics14.DisplaysUSgallons/liters

g038363

2.Displaysenginehours

3.DisplaysPTOhours

offuel

5.Play/Start

6.Reset

Whenatripstatisticisplaying,thestatisticsarenot
highlightedandtheresetbuttonisblackedoutand
notavailable.Pressingthepausebuttonstopsthe
collectionofdata.

g038365

g030207

1.TripStatistics44.DisplaysUSgallons/liters

2.Displaysenginehours

3.DisplaysPTOhours

Figure26

offuel

5.Pause/Stop

PressthetogglebuttonontheTripStatistics5screen
togobacktothemainTripStatisticsscreen.

9

AdvancedSettingsMenu

Whentheadvancedsettingsmenuisselected,the
modulepromptsyoufora4digitpasscode.The
defaultdigitsonthedisplayscreenare0000.

Figure27

Pressingtheresetbuttonbringsupascreenaskingto
conrmtheresetreminder.

HydraulicTransOil

Afterperformingthenecessarymaintenance,this
screenallowsyoutoresetthenumberofhoursuntil
thehydraulictransmissionoilserviceisdue.

g030221

1.Enterpassword

2.Activedigits5.Decrease

3.Increase

4.Enter/Return

Thepasscodeis1982.Whentheactivedigitis
highlighted,presstheincreaseordecreasebuttonsto
scrollthroughdigitsfrom0to9.Pressentertoselect
thehighlighteddigit.

Iftheincorrectpasswordisentered,themodule
takesyoubacktothemenuselectscreen.Whenthe
correctpasswordisentered,youcanscrollbetween
thefollowingscreens:

•EngineOil(page10)

•HydraulicTransOil(page10)

•HistoricalError(page10)

•Alarms(page11)

•EngineSettings(page11)

•CalibrateEngineSettings(page12)

•FactoryDefaults(page12)

EngineOil

Afterperformingthenecessarymaintenance,this
screenallowsyoutoresetthenumberofhoursuntil
theengineoilserviceisdue.

Figure29

1.HydraulicTransOil

2.Reminderdisplay4.Reset

3.Remaininghoursuntil
service

Pressingtheresetbuttonbringsupascreenaskingto
conrmtheresetreminder.

Everytimeyouresetthehydraulictransmissionoil
servicereminder,themodulepromptsyoutoselect
whetherthemachinewasservicedwithT oroPremium
HydraulicOil.PressingY(yes)orN(no)determines
thecorrectmaintenanceschedule.

HistoricalError

Thisscreendisplayserrorsthatarenolongeractive.
Thelogkeepsarunningcountofthenumberoftimes
theerrorhasoccurredduringthelifeofthemachine
andtheenginehouratwhichthelastoccurred.The
logdisplaystheerrorsstartingwiththemostrecent
occurrence.

g030246

Figure28

1.EngineOil

2.Reminderdisplay4.Reset

3.Remaininghoursuntil
service

g030224

Figure30

1.HistoricalError

g030245

2.Currenterror(e.g.LowOil
Pressure)

10

3.Numberoftimestheerror
occurredduringlifeof
machine(e.g.,3X)

4.Enginehouratwhichthe
errorlastoccurred

Alarms

EngineSettings

Thealarmsscreenallowsyoutoactivateand
deactivatetheaudiblealarmforindividualerrors.
PresstheEnterbuttontoaccessindividualerroralarm
settings.

Note:Notallaudiblealarmscanbedeactivated.

Figure31

1.Alarms3.AudibleAlerts

2.Activate/Deactivate

Thehighlightederrornameindicatesthattheaudible
alarmisactive.Pressingentermodiesthestatusof
theaudiblealarmtoOnorOff.

4.Enter

Thisscreenallowsyoutoadjusttheenginespeed
attheMaximum,Efcient,andLowsetpointsfor
bothtransport(clutchdisengaged)andmow(clutch
engaged)modesin50rpmincrements.

g030227

Figure33

g030225

1.EngineSettings2.AdjustEngineSpeeds

Pressingtheuparrowincreasestheenginespeed
whilepressingthedownarrowdecreasestheengine
speed.PressingtheEnterbuttonconrmsthe
speedandautomaticallymovesyoutothenext
screen/enginespeedsetpoint.

Figure32

1.Alarms4.Toggle

2.ClutchOvercurrent

3.FuelLow

5.Enter

Youcandeactivatetheaudiblewarningforthe
followingerrors:

•ServiceAirFilter

•ServiceEngineOil

•ServiceTransmissionOil

•ServiceGearBoxOil(asapplicable)

•FuelLow

•ClutchOvercurrent

•ClutchResetRequired

•EngineErrorCodes

•SystemOvervoltage>16VDC

•SystemUndervoltage<9VDC

g038366

1.EngineSettings

2.SetLowMowSpeed

3.Enginespeedinrpm(e.g.

3600)

Figure34

4.Uparrow—Increase

5.Enter

6.Downarrow—Decrease

g030228

Thesystemdoesnotallowthefollowingtooccur:

•Theefcientspeedcannotbesethigherthanthe

maximumspeed.

•Thelowspeedcannotbesethigherthanthe

efcientspeed.

Note:Youcansetthemaximumspeedequaltothe

efcientmowspeedtousetheefcientmodewhile
mowing.

•SystemVoltageLow

11

CalibrateEngineSettings

FactoryDefaults

Thisscreenallowsthecalibrationoftheactualengine
speedtomatchthecommandedenginespeed.
Theenterbuttonblacksoutifthebladesarenot
disengaged,theparkingbrakeisnotengaged,and
themotion-controlleversarenotintheNEUTRAL-LOCK
position.Oncetheyare,presstheEnterbuttonto
startthecalibrationprocess.

Figure35

1.CalibrateEngineSettings2.StartCalibration

Ananimatedhourglassappearsindicatingthe
calibrationisinprocess.

Thisscreenallowsyoutoresetsystemsettingsback
tothefactorydefaultsettings.PressingtheEnter
buttonbringsupconrmationscreen;pressY(yes)to
resetorN(no)tocancel.

Note:Resettingthesystemreturnstheenginespeed

settingsandalarmsettingsbacktothefactorydefault
settings.

g030234

Figure38

1.FactoryDefaults

2.Reset

Whentheexitscreenappears,presstheenterbutton
togobacktotheMenuSelectionscreen.

g030238

Figure36

1.CalibrateEngineSpeed

2.Calibrating

3.Processing

Oncethecalibrationiscomplete,youcantoggleback
totheprimaryCalibrateEngineSpeedscreen.

Figure37

1.CalibrationEngineSpeed

2.CalibrationComplete

3.Togglebetweenscreens

ReturningtotheDefault Screen(Engine-Onor Engine-Off)

Thereare3waystoreturntothedefaultscreen:

g030235

•Pressthepreviousornextarrowkeysuntilthe

ExitscreenappearsthenpresstheEnterbuttonto
returntotheMenuSelectionscreen.

•TurntheignitionkeytotheOFFpositionand

eitherrestarttheengineorturnthekeytotheON
position.

•Pressandholdthe2outsidebuttons.

SettingEngineSpeeds

Atstartup,thesystemdefaultstotheLowengine
speed.Theiconontheinformationscreenis
highlighted.

•PressthebuttonbelowtheEfcientSpeedMode

icontoincreasetheenginespeedtotheEfcient

g030237

enginespeed.

TheEfcientSpeedModeiconishighlighted.

•PressthebuttonbelowtheMaximumSpeedMode

icontoincreasetheenginespeedtothemaximum
enginespeed.

TheMaximumSpeedModeiconishighlighted.

Note:IfyouengagethePTOswitchatanyspeed

setting,theenginespeedncreasestothemowspeed.

12

Adjustingthe Electronically-Controlled LowModeSpeed Adjustment

Whenoperatinginlowmowmode,pressandholdthe
LowSpeedModebuttonreducetheenginespeed
(minimumof2250rpm).PresstheLowSpeedMode
buttonagaintoreturntheenginetothedefaultsetting.

AutoIdleDownMode

Iftheoperatorleavestheseatandthesafetyinterlocks
allowtheenginetoremainrunning,thesystementers
theautoidlemodeandautomaticallysettheengine
speedtothelowtransportspeed.Whenyoureturn
totheseat,thesystemautomaticallyreturnstothe
previouslyselectedenginespeedmode.Ifyouselect
anotherenginespeedsetting,thesystemexitsthe
autoidlemodeandtheenginerunsattheselected
speed.

ErrorMessages

Ifanerroroccurs,amessagedisplaysinplaceofthe
enginetemperature,enginespeed,andfuellevel.In
additiontodisplayingthefaultastext,thesystem
turnstheLEDredandsoundstheaudiblealarm.

•Thesystemiscapableofdisplayingthefollowing

errors:

–ServiceAirFilter:Anairlterisrequired.

–ServiceEngineOil:Engineoilmaintenance

isrequired.

–ServiceTransmissionOil:Transmissionoil

maintenanceisrequired.

–ServiceDeckGearboxOil(asapplicable):

Deckgearboxoilmaintenancerequired.

–LowOilPressure:Lowengine-oilpressureis

detected.

–FuelLow:Thefuellevelislow.

–EngineOverTemperature:Theengineover

temperatureisdetected.

–SystemOvervoltage>16VDC:Thesystem

voltageistoohigh(greaterthan16V).

–SystemUndervoltage<9VDC:Thesystem

voltageistoolow(greaterthan9V).

–ClutchOvercurrent:Thecuttingclutch

currentistoohigh.

–ClutchResetRequired:ThePTOswitch

mustbeturnedoffandtoactivatethePTO.

–EngineErrorCodes:Thesystemdisplays

engineerrorcodesprovidedbytheengine
manufacturer.

–ClutchOutputFailure:Theclutchoutputis

openorshorted.

–SystemVoltageLow:Thevoltageistoolow

(lessthan12.3V).

–EngineCommunicationError:The

communicationbetweenengineandmodule
waslost.

–ModuleCommunicationError:The

ommunicationbetweentheLDUandMCU
moduleswaslost.

•Youcanacknowledgeandsilencesomeofthe

errorslistedabove.Movethemotion-control
leverstotheNEUTRAL-LOCKpositionandpress
andholdthemiddlebutton.

Acknowledginganerrorremovestheerror
messagefromtheenginetemperature,engine
speed,orfuelleveliconareaandsilencethe
audiblealarm.However,theerrorcontinues
todisplayontheactiveerrorscreeninthe
MaintenanceandServiceMenuandthestatus
LEDcontinuestobeilluminatedred.

–Thefollowingerrorsemitaslowchirpingsound

thatyoucanacknowledgeandsilence:

◊ServiceEngineOil
◊ServiceTransmissionOil
◊FuelLow
◊ClutchOvercurrent
◊ClutchResetRequired
◊EngineErrorCodes
◊Anti-StallActive
◊ServiceAirFilter
◊ServiceDeckGearBox

–Thefollowingerrorsemitafastchirpingsound

andcanbeacknowledgedandsilenced:

◊SystemOvervoltage>16VDC
◊SystemUndervoltage<9VDC

–Thefollowingerrorcodesemitafastchirping

soundandcannotbeacknowledgedor
silenced.

◊LowOilPressure
◊EngineOverTemperature
◊EngineCommunicationError
◊ModuleCommunicationError
◊ClutchOutputFailure
◊EngineLimpModeActive

•Inordertoprotectthesystemcomponentsfrom

exceedingthresholdlimits,thesystemisdesigned
tolimittheenginespeedand/ordisengagethe

13

clutch,whichallowsthemachinetobedrivenonto
atrailerorreturnedtoaservicearea.

Therearethefollowingerrors:

1.ClutchOvercurrent

Ifanovercurrenteventoccurs,thesystem
limitstheenginespeedtotheEfcient
TransportModespeedandplacesthe
machineinSafeTransportMode.Safe
TransportModelimitstheenginespeed,
locksoutthePTO,anddisengagesthe
clutch;aClutchOvercurrenterrormessage
willdisplay.CyclingthekeyswitchtotheOFF
andthentotheONpositionclearsthefault.

2.SystemOvervoltage>16VDC

Ifthevoltageexceeds16V,thesystemwill
disengagetheclutchanddisplaysaSystem
Overvoltage>16VDCerrormessage.

3.SystemUndervoltage<9VDC

Ifthevoltageislessthan9V ,thesystem
willnotallowclutchengagementanddisplay
theerrorSystemUndervoltage<9VDC.If
theclutchwasengagedbeforetheerror
occurred,thesystemallowstheclutchto
remainengaged;however,lowvoltagemay
causetheclutchtodisengageitself.

4.LowOilPressure

Iflowengine-oilpressureisdetected,the
systemlimitsenginespeedtotheEfcient
TransportModespeedandplacesthe
machineinSafeTransportMode.Safe
TransportModelimitstheenginespeed,
locksoutthePTO,anddisengagesthe
clutch;aLowOilPressuremessagewill
display.CyclingthekeyswitchtotheOFF
andthentotheONpositionclearsthefault.

5.EngineOverTemperature

Whentheenginebeginstooverheat,the
systemashestheenginetemperature
bargraphandchirpstheaudiblealarm.
Ifthetemperaturerisesabovetheupper
limit,thesystemlimitstheenginespeed
totheEfcientTransportModespeedand
placesthemachineinSafeTransportMode.
SafeTransportModelimitstheengine
speed,locksoutthePTO,anddisengages
theclutch;anEngineOverT emperature
messagedisplays.Thefaultclearsoncethe
temperaturefallsbelowasafelimit.

14

Troubleshooting

SystemErrorMessageStatusLEDSystemActions

ServicetheEngineOil

Servicethe
TransmissionOil

LowOilPressure

EngineOver
Temperature

FuelLowBlinkRedFuellevellow.

SystemOvervoltage
>16VDC

BlinkRed

BlinkRed

SafeTransport

BlinkRed

Green

BlinkRed

BlinkRed

Mode—enginelimited
toEfcientmodeandthe
PTOisdisengaged.

Singlealarmchirpand
temperaturedisplay
ashes.

SafeTransport
Mode—enginelimited
toEfcientmodeandthe
PTOisdisengaged.

Disallowclutch
engagement/Disengage
theclutch.

IssueDescription

Engineoilserviceis
due.

Transmissionoil
serviceisdue.

Engineoilpressureis
belowlimit.

Enginetemperatureis
high.

Enginetemperature
abovelimit.

Systemvoltage
excessive/above
16V.

RecommendedCorrectiveAction

Replacetheengineoilandlter.
Followtheresetprocedure;referto

EngineOil(page10).

Replacethetransmissionoiland
lter(s).Followtheresetprocedure;
refertoHydraulicTransOil(page10).

Cyclethekeyswitchtoclearthe
fault.Checktheoillevel.Contactan
AuthorizedServiceDealer.

Checktheoillevel.Cleandebrisfrom
theengine.Inspecttheenginefan.
ContactanAuthorizedServiceDealer.

Checktheoillevel.Cleandebrisfrom
theengine.Inspecttheenginefan.
ContactanAuthorizedServiceDealer.

Checkthefuellevelandaddfuelas
necessary.

Checkthebatteryandengine
chargingsystem.Contactan
AuthorizedServiceDealer.

SystemV oltageLow

SystemUnder
voltage<9VDC

ClutchOvercurrent

ClutchResetRequired

ClutchOutputFault

EngineMILErrorsBlinkRed

BlinkRed

BlinkRed

BlinkRed

Alternating
green/orange

BlinkRed

Disallowclutch
engagement/Disengage
clutch.

SafeTransport
Mode—enginelimited
toEfcientmodeandthe
PTOisdisengaged.

Systemvoltagebelow

12.3V.

Systemvoltagebelow
lowerlimitof9V .

Clutchcurrentis
abovelimit.

ThePTOswitchis
intheup/engaged
positionandthe
modulehaslatched
theclutchoutputOff.

Clutchoutputshortor
open.

EngineECUhas
detectedafault.

Checkthebatteryandengine
chargingsystem.Contactan
AuthorizedServiceDealer.

Checkthebatteryandengine
chargingsystem.Contactan
AuthorizedServiceDealer.

Cyclethekeyswitchtoclearthe
fault.CheckthePTOclutchcondition
andtherelatedwiring.Contactan
AuthorizedServiceDealer.

CyclethePTOswitchtotheOFF
positionandbacktotheONposition
toengagetheclutch.

IftheclutchisstuckintheONposition,
discontinueuseandcontactan
AuthorizedServiceDealer.Check
theclutchconnectionandassociated
wiringforanopencircuit.

Seetheengineowner’smanualforthe
errordescriptionandtroubleshooting
information.

15

SystemErrorMessageStatusLEDSystemActions

IssueDescription

RecommendedCorrectiveAction

Engine
CommunicationError

Module
CommunicationError

Communication

BlinkRed

SafeTransport

BlinkRed

Mode—enginelimited
toEfcientmodeandthe
PTOisdisengaged.

betweenthemodule
andtheengineECU
hasbeenlost.

Communication
betweentheLDU
moduleandMCU
modulehasbeenlost.

Checktheelectricalconnectionsat
themodule,interconnectbetween
theenginewireharness,andchassis
harness.Checktheconnections
attheengineECU.Contactan
AuthorizedServiceDealer.

Checktheelectricalconnectionsat
theLDUandMCUmodule.

16