Intakeairsystem

SECONDARYTHROTTLECONTROLSYSTEM

Thesecondarythrottlecontrolsystem(STCsystem)consistsofthesecondarythrottlevalve(STvalve),secondarythrottlevalveactuator(STVactuator)andsecondarythrottlepositionsensor(STPsensor).

STvalveisinstalledineachthrottlebody.STVactuatorandSTPsensorareinstalledontherightsideofthethrottlebodyassembly.TheSTvalveisturnedbytheSTVactuator.

Thissystemisdesignedtocontrolthevolumeandthevelocityofintakeairsoastoimproveengineoutputpower.Thesystemproducesmoreseamlessandlinearthrottleresponse.

Thisisperformedbyopeningorclosingthethrottlebodyintakeportaccordingtothegearpositionsandenginerpm.

Whentheengineisrunninginalowspeedrange,theintakeportisalmostclosedforcontrolledintakeairvolume.Thisimprovestheeffecttointakeairflowpulsationsothattheenginecanoutputhigherpowerinthisspeedrange.

Astheenginespeedgrowsfaster,theintakeportaregraduallyopenforguidingthepropervolumeofair

_{intothethrottlebodiessothattheenginecanproducethemaximumpowerineachspeedrange.}

_-

'------Secondarythrottlevalve

_(STV)

Secondarythrottlevalveactuator(STVA)

OPERATION

Thesecondarythrottlecontrolsystem(STCsystem)operatesonthesignalsuppliedfromtheECM.Theopen/closeoperationofthesecondarythrottlevalve(STvalve)isperiormedbythesecondarythrottlevalveactuator(STVactuator)whichiscontrolledbytheSTCunittochangethecurrentdirectionintothemotoroftheSTVactuator.

TheSTPsensordetectstheSTVactuatormovementbymeasuringvol1ageandtheECMdeterminesthe

STvalveanglebasedontheoperationmap.

WhenturningtheignitionswitchON,everytimetheSTVactuatorautomaticallydrivestheSTvalveandchecksfullycloseandopenpositionvoltageandreturntooriginalpositiontoconfirmeachSTvalvepositionvoltage.

Secondarythrottlevalveactuator(STYA)

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SELF-DIAGNOSISFUNCTION

Theself-diagnosisfunctionisincorporatedintheECM.Thefunctionhastwomodes,"Usermode"and"Dealermode".TheusercanonlybenotifiedbytheLCD(DISPLAY)panelandLED(Fllight).TocheckthefunctionoftheindividualFlsystemdevices,thedealermodeisprepared.Inthischeck,thespecialtoolisnecessarytoreadthecodeofthemalfunctionitems.

USERMODE

MALFUNCTION ^{LCD(DISPLAY)FlLIGHTINDICATION}MODEINDICATION INDICATION

"NO"^{CoolantTemp.--}

_"YES"^{CoolantTemp.andFllightturnsON.Each2sec.Temp.}

^{'Fl"lettersor"Fl"isindicated.}

_*1

Enginecanstart

Enginecannotstart"Fl"letterFllightturnsON^{"Fl"isindicated}

^*2andblinks.^{continuously.}

*1

WhenoneofthesignalsisnotreceivedbyECM,thefail-safecircuitworksandinjectionisnotstopped.Inthiscase,"Fl"andcoolanttemp.areindicatedintheLCDpanelandmotorcyclecanrun.

*2

Theinjectionsignalisstopped,whenthecamshaftpositionsensorsignal,crankshaftpositionsensorsignal,tipoversensorsignal,#1/#2,#3and#4ignitionsignaJs,#1,#2,#3and#4injectorsignals,fuelpumprelaysignalorignitionswitchsignalisnotsenttoECM.Inthiscase,"Fl"isindicatedintheLCDpanel.Motorcycledoesnotrun.

"CHEC":TheLCDpanelindicates"CHEC"whennocommunicationsignalfromtheECMisreceivedfor5

seconds.

ForExample:

TheignitionswitchisturnedON,andtheenginestopswitchisturnedOFF.Inthiscase,thespeed•

ometerdoesnotreceiveanysignalfromtheECM,andthepanelindicates"CHEC".

IfCHECisindicated,theLCDdoesnotindicatethetroublecode.ItisnecessarytocheckthewiringharnessbetweenECMandspeedometercouplers.

Thepossiblecauseofthisindicationisasfollows;

EnginestopswitchisinOFFposition.Side-stand/ignitioninter-locksystemisnotworking.Ignitionfuseisburnt.

NOTE:

Untilstartingtheengine,theFllightturnsON.

TheFllightisalsoturnedONwhenenginetemperatureishigh,oroilpressureislow.

DEALERMODE

Thedefectivefunctionismemorizedinthecomputer.Usethespecialtool'scouplertoconnecttothedealermodecoupler.ThememorizedmalfunctioncodeisdisplayedonLCD(DISPLAY)panel.MalfunctionmeansthattheECMdoesnotreceivesignalfromthedevices.Theseaffecteddevicesareindicatedinthecodeform.

1.ffi8t109930-82710:Modeselectswitch

IACAUTIONI

Beforecheckingthemalfunctioncode,donotdisconnecttheECMleadwirecouplers.

IfthecouplersfromtheECMaredisconnected,themalfunctioncodememoryiserasedandthemalfunctioncodecannotchecked.

_MALFUNCTION^{LCD(DISPLAY)Fl}LIGHTINDICATION^{INDICATIONMODEINDIC}ATION

"NO"^coo-

^{c**codeisindicated}_{FllightturnsOFF.Foreach2sec.,codeis}

"YES"^{fromsmallnumeralto}

largeone.

indicated.

CODE	MALFUNCTIONPART	REMARKS
cooc11	None Camshaftpositionsensor(CMPsensor)	Nodefectivepart

^{c12Crankshaftpositionsensor(CKPsensor)Pick-up}coilsignal,signalgenerator

^c13Intakeairpressuresensor(IAPsensor)

c14Throttlepositionsensor(TPsensor)^~3c15Enginecoolanttemp.sensor(ECTsensor)

c21Intakeairtemp.sensor(IATsensor)

c22Atmosphericpressuresensor(APsensor)

c23Tipoversensor(TOsensor)

^{c24Ignitionsignal#1(IGcoil#1)For}#1cylinder^{c25Ignitionsignal#2(IGcoil#2)For}#2cylinder^{c26Ignitionsignal#3(IGcoil#3)For}#3cylinder^{c27Ignitionsignal#4(IGcoil#4)F}or#4cylinderc28Secondarythrottlevalveactuator(STVactuator)

_{c29Secondarythrottlepositionsensor(STPsensor)}

c30	Secondarythrottlecontrolunit(STC	unit)
c31	Gearpositionsignal(GPswitch)
c32	Injectorsignal#1(Fl#1)		For#1cylinder
c33 c34c35	Injectorsignal#2(Fl#2) Injectorsignal#3(Fl#3)Injectorsignal#4(Fl#4)		For#2cylinderFor#3cylinderFor#4cylinder

^{c41Fuelpumpcontrolsystem(FPcontrolsystem)F}uelpump,Fuelpumprelay

^c42Ignitionswitchsignal(IGswitchsignal)_Anti-theft

IntheLCD(DISPLAY)panel,themalfunctioncodeisindicatedfromsmallcodetolargecode.

*3

Togetthepropersignalfromthethrottlepositionsensor,thesensorbasicpositionisindicatedintheLCD(DISPLAY)panel.Themalfunctioncodeisindicatedinthreedigits.Infrontofthethreedigits,alineappearsinanyoftheposition,upper.middleorlowerline.Iftheindicationisupperorlowerlinewhenenginerpmis

1300rpm,slightlyturnthethrottlepositionsensorandbringthelinetomiddle.

Inthenormalcondition,thethrottlevalvestopscrewpushesthrottlevalvesslightly,andindicationpointismiddleline.

Settingprocedure:

1.Adjusttheenginerpmto1300rpm.(c:::::l'"2-15)

2.Stoptheengineandconnectthespecialtool(Modeselectswitch)tothedealermodecoupleratthewiringharness.

3.Ifthethrottlepositionsensoradjustmentisnecessary,loosenthescrewsandturnthethrottlepositionsensorandbringthelinetomiddle.

4.Then,tightenthescrewstofixthethrottlepositionsensor.

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FAIL-SAFEFUNCTION

Flsystemisprovidedwithfail-safefunctiontoallowtheenginetostartandthemotorcycletoruninaminimumperformancenecessaryevenundermalfunctioncondition.

^{ITEMFAIL-SAFEMODESTARTINGABILITYRUNN}INGABILITYCamshaftposition^{Whencamshaftposition}

_sensorsignalhastailedduringrunning,

^"NO""YES"

^{theECMdeterminescylinderM}otorcyclecanrun,buto1ceenginestops,engine^{as#beforeoccurrenceofcan}notstart.

suchafailure.

_{CrankshaftpositionThemotorcyclestops.}

sensor

Intakeairpressure^{Intakeairpressureisfixedsenso}rto760mmHg.

_{ThrottlepositionThethrottleopeningis}

"NO""NO"

^"YES""YES"

sensor^{fixedtofullopenposition."Y}ES"^HYES"Ignitiontimingisalsofixed.

_{EnginecoolantEnginecoolanttemperature}

temperaturesensorvalueisfixedto80°C.Intakeair^{Intakeairtemperature}

"YES""YES"

_{temperaturesensorvalueisfixedto40°C.}^"YES""YES"

_{AtmosphericAtmosphericpressureis}

_{pressuresensorf}ixedto760mmHg.

^"YES""YES"

^{Ignition"YES""}YES"signal^{#1#1Ignition-off#}2,#3&#4cylinderscanrun.

_"YES""YES"

^{#2#2Ignition-off}_{#1,#3&#4cylinderscanrun.}

_"YES""YES"

^{#3#3Ignition-off}_{#1,#2&#4cylinderscanrun.}

_"YES""YES"

^{#4#4Ignition-off}_{#1,#2&#3cylinderscanrun.}