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FlSystemandintakeairsystem

PRECAUTIONSINSERVICING

.

4-

2

FlSYSTEMTECHNICALFEATURES

.

4-

8

INJECTIONTIME

.

4-

8

COMPENSATIONOFINJECTIONTIME

.

4-

9

INJECTIONSTOPCONTROL

.

4-

9

FUELDELIVERYSYSTEM

.

4-10

FUELPUMP

.

4-11

FUELPRESSUREREGULATOR

.

4-12

FUELINJECTOR

.

4-12

FUELPUMPCONTROLSYSTEM

.

4-13

ECM(FlCONTROLUNIT)

.

4-14

INJECTIONTIMING

.

4-15

SENSORS

.

4-16

INTAKEAIRSYSTEM.4-20

SECONDARYTHROTTLECONTROLSYSTEM

.

4-20

OPERATION

.

4-21

FlSYSTEMPARTSLOCATION

.

4-22

FlSYSTEMDIAGRAM

.

4-24

FlSYSTEMWIRINGDIAGRAM

.

4-25

SELF-DIAGNOSISFUNCTION

.

4-26

USERMODE

.

4-26

DEALERMODE

.

4-27

FAIL-SAFEFUNCTION

.

4-29

FlSYSTEMTROUBLESHOOTING

.

4-30

CUSTOMERCOMPLAINTANALYSIS

.

4-30

SELF-DIAGNOSTICPROCEDURES

.

4-31

SELF-DIAGNOSISRESETPROCEDURE

.

4-31

MALFUNCTIONCODEANDDEFECTIVECONDITION

.

4-32

"C11"CMPSENSORCIRCUITMALFUNCTION

.

4-34

"C12"CKPSENSORCIRCUITMALFUNCTION

.

4-35

"C13"/APSENSORCIRCUITMALFUNCTION

.

4-36

"C14"TPSENSORCIRCUITMALFUNCTION

.

4-38

"Ct5"ECTSENSORCIRCUITMALFUNCTION

.

4-40

"C21"/ATSENSORCIRCUITMALFUNCTION

.

4-41

"C22"APSENSORCIRCUITMALFUNCTION

.

4-42

"C23"TOSENSORCIRCUITMALFUNCTION

.

4-44

"C24","C25","C26"or"C27"IGNITIONSYSTEMMALFUNCTION

.

4-45

"C28"STVACTUATORCIRCUITMALFUNCTION

.

4-45

"C29"STPSENSORCIRCUITMALFUNCTION

.

4-46

"C30"STCUNITCIRCUINMALFUNCTION

.

4-48

''C31"GEARPOSITIONSWITCHCIRCUITMALFUNCTION

.

4-49

"C32","C33","C34"or"C35"FUELINJECTIONMALFUNCTION

.

4-50

"C41"FPRELAYCIRCUITMALFUNCTION

.

4-51

"C42"JGSWITCHCIRCUITMALFUNCTION

.

4-51

CONTENTS

_,.

FUEL

TANK

LIFT-UP.....................................................................

4-52

FUEL

TANK

REMOVAL

4-52

FUEL

TANK

INSTALLATION........................................................

4-52

FUELPRESSUREINSPECTION.................................................4-53

FUEL

PUMP

INSPECTION...........................................................

4-54

FUEL

PUMP

RELAYINSPECTION..............................................

4-56

FUEL

PUMP

ANDFUELFILTERREMOVAL..............................

4-56

FUEL

MESH

FILTERINSPECTIONANDCLEANING................

4-58

FUEL

PUMP

ANDFUELMESHFILTERINSTALLATION..........

4-58

THROTTLEBODYANDSTVACTUATOR......................................

4-61

CONSTRUCTION..........................................................................

4-61

AIRCLEANERBOXANDTHROTTLEBODYREMOVAL

4-62

THROTTLEBODYDISASSEMBLY..............................................

4-64

THROTTLEBODYCLEANING.....................................................

4-66

INSPECTION.................................................................................

4-66

THROTTLEBODYREASSEMBLY..............................................

4-67

THROTTLEBODYINSTALLATION.............................................

4-70

STPSENSORADJUSTMENT......................................................

4-71

FUELINJECTORINSPECTION

4-72

FUELINJECTORREMOVAL........................................................

4-72

FUELINJECTORINSTALLATION...............................................

4-72

FASTIDLEADJUSTMENT...........................................................4-72

THROTTLE

VALVESYNCHRONIZATION...................................

4-73

THROTTLE

POSITIONSENSOR(TPS)SETTING......................

4-76

THROTTLE

CABLEADJUSTMENT............................................

4-76

SENSORS.........................................................................................

/APSENSORINSPECTION..........................................................

/APSENSORREMOVAUINSTALLATION...................................TPSENSORINSPECTION...........................................................TPSENSORREMOVAUINSTALLATION

CKPSENSORINSPECTION........................................................CKPSENSORREMOVAUINSTALLATION

CMPSENSORINSPECTION........................................................

CMPSENSORREMOVAUINSTALLATION.................................

/ATSENSORINSPECTION..........................................................

/ATSENSORREMOVAUINSTALLATIONECTSENSORINSPECTION

ECTSENSORREMOVAUINSTALLAT/ON

APSENSORINSPECTION...........................................................

APSENSORREMOVAUINSTALLATION....................................TOSENSORINSPECTION...........................................................

TOSENSORREMOVAU/NSTALLATIONSTPSENSORINSPECTION..

STPSENSORREMOVAUINSTALLATION..................................

4-77

4-77

4-77

4-77

4-77

4-77

4-77

4-77

4-77

4-77

4-77

4-78

4-78

4-78

4-78

4-78

4-78

4-78

4-78

FUELSYSTEM4-52

PRECAUTIONSINSERVICING

WhenhandlingtheFlcomponentpartsorservicingtheFlsys•

tem,observethefollowingpointsforthesafetyofthesystem.

CONNECTOR/COUPLER

•Whenconnectingaconnector,besuretopushitinuntilaclickisfelt.

•Withalocktypecoupler,besuretoreleasethelockwhendis•connecting,andpushitinfullytillthelockworkswhencon•nectingit.

•Whendisconnectingthecoupler,besuretoholdthecoupler

bodyanddonotpulltheleadwires.

-

•Inspecteachterminalontheconnector/couplerforloosenessorbending.

•Inspecteachterminalforcorrosionandcontamination.

Theterminalsmustbecleanandfreeofanyforeignmaterialwhichcouldimpedeproperterminalcontact.

•Inspecteachleadwirecircuitforpoorconnectionbyshakingitbyhandlightly.Ifanyabnormalconditionisfound,repairorreplace.

•Whentakingmeasurementsatelectricalconnectorsusingatesterprobe,besuretoinserttheprobefromthewireharness

side(backside)oftheconnector/coupler.

G)Coupler

~Probe

•Whenconnectingmeterprobefromtheterminalsideofthecoupler(connectionfromharnesssidenotbeingpossible),useextracarenottoforceandcausethemaleterminaltobendorthefemaleterminaltoopen.

Connecttheprobeasshowntoavoidopeningoffemaletermi•

nal.

Neverpushintheprobewheremaleterminalissupposedtofit.

•Checkthemaleconnectorforbendandfemaleconnectorfor

excessiveopening.Alsocheckthecouplerforlocking(loose•

ness),corrosion,dust,etc.

G)Coupler

CZ)Probe

Q)Wheremale

terminalfits

FUSE

•Whenafuseblows,alwaysinvestigatethecause,correctitandthenreplacethefuse.

•Donotuseafuseofadifferentcapacity.

•Donotusewireoranyothersubstituteforthefuse.

ECMNARIOUSSENSORS

•Sinceeachcomponentisahigh-precisionpart,greatcareshouldbetakennottoapplyanysharpimpactsduringremovalandinstallation.

•BecarefulnottotouchtheelectricalterminalsoftheECM.Thestaticelectricityfromyourbodymaydamagethispart.

•WhendisconnectingandconnectingtheECMcouplers,makesuretoturnOFFtheignitionswitch,orelectronicpartsmaygetdamaged.

•Batteryconnectioninreversepolarityisstrictlyprohibited.SuchawrongconnectionwilldamagethecomponentsoftheFlsys•teminstantlywhenreversepowerisapplied.

IgnitionS/W

•Removinganybatteryterminalofarunningengineisstrictlyprohibited.

Themomentsuchremovalismade,damagingcounterelectro•motiveforcewillbeappliedtotheECMwhichmayresultinseriousdamage.

•Beforemeasuringvoltageateachterminal,checktomakesurethatbatteryvoltageis11Vorhigher.Terminalvoltagecheckatlowbatteryvoltagewillleadtoerroneousdiagnosis.

•Neverconnectanytester(voltmeter,ohmmeter,orwhatever)totheECMwhenitscouplerisdisconnected.Otherwise,dam•agetoECMmayresult.

•NeverconnectanohmmetertotheECMwithitscouplercon•

nected.Ifattempted,damagetoECMorsensorsmayresult.

•Besuretouseaspecifiedvoltmeter/ohmmeter.Otherwise,ac•curatemeasurementsmaynotbeobtainedandpersonalinjurymayresult.

ELECTRICALCIRCUITINSPECTIONPROCEDURE

Whiletherearevariousmethodsforelectricalcircuitinspection,describedhereisageneralmethodtocheckforopenandshortcircuitusinganohmmeterandavoltmeter.

OPENCIRCUITCHECK

-

Possiblecausesfortheopencircuitareasfollows.Asthecausecanexistintheconnector/couplerorterminal,theyneedtobecheckedcarefully.

•Looseconnectionofconnector/coupler

•Poorcontactofterminal(duetodirt,corrosionorrust,poorcontacttension,entryofforeignobjectetc.)

•Wireharnessbeingopen

•Poorterminal-to-wireconnection

•Disconnectthenegativecablefromthebattery.

•Checkeachconnector/coupleratbothendsofthecircuitbeingcheckedforlooseconnection.Alsocheckforconditionofthe

couplerlockifequipped.

•Usingatestmaleterminal,checkthefemaleterminalsofthecircuitbeingcheckedforcontacttension.

Checkeachterminalvisuallyforpoorcontact(possiblycaused

bydirt,corrosion,rust,entryofforeignobject,etc.).Atthesametime,checktomakesurethateachterminalisfullyinsertedinthecouplerandlocked.

Ifcontacttensionisnotenough,rectifythecontacttoincrease

tensionorreplace.

Theterminalsmustbecleanandfreeofanyforeignmaterialwhichcouldimpedeproperterminalcontact.

•Usingcontinuityinspectorvoltagecheckprocedureasde•scribedbelow,inspectthewireharnessterminalsforopencir•cuitandpoorconnection.Locateabnormality,ifany.

Checkcontacttensionbyinsertingandremoving.

~A~!1b}

t.~®

(2)

G)Loosenessofcrimping

(2)Open

@Thinwire(afewstrandsleft)

Continuitycheck

•Measureresistanceacrosscoupler~·(between®and©inthefigure).

Ifnocontinuityisindicated(infinityoroverlimit),thecircuitis

openbetweenterminals15,,and©.

~

©

•Disconnectthecoupler@andmeasureresistancebetweencouplers®and@.

Ifnocontinuityisindicated,thecircuitisopenbetweencou•plers®and@.Ifcontinuityisindicated,thereisanopencir•cuitbetweencouplers@'and©oranabnormalityincoupler

®'orcoupler©.