11.16 ServiceManual-RocketIll

SensorLocations

CLUTCHSWITCH

\

PRIMARYTHROTTLEPOSITIONSENSOR

SECONDARYTHROTTLEPOSITIONSENSOR

oolj

COOLANTTEMPERATURESENSOR

SIDESTANDSWITCH

OXYGEN(LAMBDA)SENSOR

MANIFOLDABSOLUTEPRESSURESENSOR

INTAKEAIRTEMPERATURESENSOR

oolh

CRANKSHAFTPOSITIONSENSOR

ServiceManual-RocketIll ^11.17

SystemActuators

In responsetosignalsreceived fromthesensors,theECMcontrolsanddirectsmessagestoaseriesofelectronicandelectro-mechanicalactuators.Thefunctionandlocationoftheactuatorsisgivenbelow.

• Primarythrottlesteppermotor-situatedatthefrontofthethrottlebodies.Theprimarythrottlestepperactuatesacam/leverwhichcausesvariationsintheclosedthrottleposition.Althoughusedprimarilytoensuretargetidlespeedismaintained,italso increasesthrottleopeningwhentheengineiscold.

• Second throttlesteppermotor-situatedbetweenthethrottlebodiesfornumbersone andtwocylinders.InresponsetodirectionfromtheECM,thesecondthrottlesteppermotormovesthesecondthrottlespindletothepositiondirectedbytheECM.Thesecondbutterflyoptimisesenginetorquebymaintainingintakeairflowspeed.Itdoesnotactasachokeforcoldstartpurposes.

• Canisterpurgevalve(Californiamodelsonly)

-situatedinthevapourreturnlinebetweenthecarboncanisterandthethrottlebodies.Thepurgevalvecontrolsthereturnofvapourwhichhasbeenstored inthe carboncanisterduringtheperiodwhentheengineisswitchedoff.Thevalveis'pulsed'bytheECM togivecontrolovertherateatwhichthecanisterispurged.

• Injectors-locatedinthethrottlebodyassembly.Theengineisfittedwiththreeinjectors.Thespraypatternoftheinjectorsisfixedbutthelengthoftimeeachinjectorcanremainopenisvariableaccordingtooperatingconditions.ThedurationofeachinjectioniscalculatedbytheECMusingdatareceivedfromthevarioussensorsinthesystem.

• Ignitioncoils-mountedonabracket, abovethecamcover.Therearethreecoilsfitted,oneforeachpairofsparkplugs.TheECMcontrolsthepointatwhichthecoilsareswitchedonandoff.Incalculating theswitch-on time,theECMallowssufficienttimeforthecoilstochargetoalevelwhereasparkcanbeproduced.Thecoilsareswitchedoffatthepointofignition,thetimingofwhichisoptimisedforgoodengineperformance.

• Falldetectionswitch-situatedbehindthelefthandsidecover.ThefalldetectionswitchwilldetectifthemotorcycleisonitssideandwillcutpowertotheECMimmediately.Thispreventstheenginefromrunningandthefuelpump fromdeliveringfuel.Intheeventofafall,theswitchisresetbyreturningthebiketoanuprightpositionandswitchingtheignitionoffthenbackonagain.

• Main powerrelay-situatedbehindthelefthandsidecover.Whentheignitionisswitchedon,themainpowerrelayispowereduptoprovideastablevoltagesupplyfortheECM.

• Fuelpump-locatedinsidethefueltank.Theelectricpumpdeliversfuelintothefuelsystem,viaapressureregulator,ataconstant3barpressure.Thepumpisruncontinuouslywhentheengineisoperatingandisalsorunbrieflywhentheignitionisfirstswitchedontoensurethat3barisavailabletothesystemassoonastheengineiscranked.Fuelpressureiscontrolledby aregulatoralsosituatedinsidethefueltank.

• Coolingfan-locatedbehindtheradiator.TheECMcontrolsswitchingonandoffofthecoolingfaninresponsetoasignalreceivedfromthecoolanttemperaturesensor.Whenthecoolanttemperaturerisestoalevelwherethecoolingeffectofnaturalairflowisinsufficient,thecoolingfanisturnedonbytheECM.Whenthecoolanttemperaturefallssufficiently,theECMturnsthecoolingfanoff.Thefanonlybecomesoperationalwhentheengineisrunning.Itwillnotoperate atanyothertime.

Note: