Ch 4 Drive Ability & Emissions

EMISSION CONTROLS 4-2 CRANKCASEVENTILATIONSYSTEM4-2 OPERATION 4-2 COMPONENTTESTING4-2 REMOVAL&INSTALLATION 4-2 EVAPORATIVEEMISSIONCONTROLS 4-2 OPERATION 4-2 COMPONENTTESTING4-3 REMOVAL&INSTALLATION 4-4 EXHAUSTGASRECIRCULATION SYSTEM 4-5 OPERATION 4-5 COMPONENTTESTING4-5 REMOVAL&INSTALLATION 4-6 ELECTRONICENGINE CONTROLS 4-7 ENGlNECONTROLUNIT/POWERTRAIN CONTROLMODULE(ECU/PCM) 4-7 OPERATION 4-7 REMOVAL&INSTALLATION 4-7 OXYGENSENSOR 4-8 OPERATION 4-8 TESTING 4-8 REMOVAL&INSTALLATION 4-8 IDLEAIRCONTROLMOTOR 4-9 OPERATION 4-9 TESTING 4-9 REMOVAL&INSTALLATION 4-9 ENGINECOOLANTTEMPERATURE SENSOR 4-10 OPERATION 4-10 TESTING 4-10 REMOVAL&INSTALLATION 4-10 INTAKEAIRTEMPERATURESENSOR 4-10 OPERATION 4-10 TESTING 4-11 REMOVAL&INSTALLATION 4-11 MASSAIRFLOWSENSOR 4-11 OPERATION 4-11 TESTING 4-11 REMOVAL&INSTALLATION 4-11 MANIFOLDABSOLUTEPRESSURE SENSOR 4-12 OPERATION 4-12 TESTING 4-12 REMOVAL&INSTALLATION 4-13 THROTTLEPOSITIONSENSOR4-13 OPERATION 4-13 TESTING 4-13 REMOVAL&INSTALLATION 4-13 CAMSHAFTPOSITIONSENSOR 4-14 OPERATION 4-14 TESTING 4-14 REMOVAL&INSTALLATION 4-14 CRANKSHAFTPOSlTlONSENSOR/CRANK ANGLESENSOR 4-14 I OPERATION 4-14 TESTING 4-15

REMOVAL&INSTALLATION 4-15 COMPONENT LOCATIONS 4-16 OBD-1 TROUBLE CODES 4-26 GENERALINFORMATION4-26 CHECKENGINVMALFUNCTION INDICATORLIGHT 4-26 SERVICEPRECAUTIONS4-26 READINGCODES 4-26 WITHASCANTOOL 4-26 WITHOUTASCANTOOL 4-27 CLEARINGCODES 4-27 DIAGNOSTICTROUBLECODES4-27 OBD-II TROUBLE CODES 4-27 GENERALINFORMATION4-27 READINGCODES 4-27 WITHASCANTOOL 4-27 WITHOUTASCANTOOL 4-27 CLEARINGCODES 4-28 WITHASCANTOOL 4-28 WITHOUTASCANTOOL 4-28 DIAGNOSTICTROUBLECODES4-28 FLASHOUTCODELIST 4-32 VACUUM DIAGRAMS 4-36

4-2

DRIVEABILITYAND EMISSIONS CONTROLS l Sludgein en ine A leakrngvalve or i?ose would cause: l Roughidle l Stalling l High idle speed

OPERATION

OPERATION

p See Figures 1, 2, and 3

p See Figures6 and 7

All enginesareequippedwith the Positive CrankcaseVenhlation(PCV)system.The PCVsystem ventscrankcasegasesinto the engineair intake wheretheyare burnedwith the fuel and air mrxture. The PCVsystemkeepspollutantsfrom being releasedinto the atmosphereIt also helpsto keepthe engine011clean,by riddingthe crankcaseof moisture and corrosivefumes.The PCVsystemconsistsof the PCVvalve,the nipplein the air intakeand the connectinghoses. Incorrectoperationof the PCVsystemcancause multiple driveabilitysymptoms. A pluggedvalve or hosemaycause’ l RoughIdle l Stallingor slow idle speed l Oil leaks

p See Figures4 and 5 1. Disconnectthe ventilationhosefrom the PCV valve. Removethe PCVvalvefrom the engine Once removed,reconnectthe ventilationhoseto the valve. 2. Startthe engineand allow to idle. Placea finger over openend of the PCVvalve. Makesure intake manifoldvacuumis felt on finger. 3. If vacuumis not felt, the PCVvalve may be restricted. 4. Turn the engineOFFand removethe PCV valve from the hose. 5. Inserta thin stick into the threadedend of the PCVvalve. Pushon the inner plungerand inspectfor movement. 6. If plungerinsidethe PCVvalve is not freeto move backand forth, the valve is cloggedand WIIIrequire replacement.

*It is possibleto clean the valve usingthe appropriatesolvent, but replacementis recommended. REMOVAL&INSTALLATION For PCVvalve removaland installation,pleaserefer to Section1 of this manual. tT9574goi

Fig. 1 Typical PCVsystemairflow

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Fig. 4 With the engine idling, checkthe end of the PCVvalve to see if vacuumis present Positive crankcase ventilation

Changesin atmospherictemperaturecausefuel tanksto breathe,that is, the air within the tank expandsand contractswith outsidetemperature changes.If an unsealedsystemwas used,whenthe temperaturerises,air would escapethroughthe tank vent tube or the vent in the tank cap.Theair which escapescontainsgasolinevapors. The EvaporativeEmissionControlSystemprovides a sealedfuel systemwith the capabilityto store and condensefuel vapors.Whenthe fuel evaporates in the fuel tank,the vapor passesthroughthe EVAP emissionvalve,throughvent hosesor tubesto a carbon filled evaporativecanister.Whenthe engineis operahngthe vaporsare drawninto the intakemanifold and burnedduringcombustion. A sealed,maintenancefreeevaporativecanisteris used The canisteris filled wrth granulesof an activatedcarbonmixture.Fuelvaporsenteringthe canister areabsorbedby the charcoalgranules.A vent cap is locatedon the top of the canisterto providefresh air to the canisterwhenit is beingpurged.Thevent cap opensto providefresh air into the canister,which circulatesthroughthe charcoal,releasingtrappedvapors and carryingthemto the engineto be burned. Fueltank pressureventsfuel vapors into the canister.Theyare held in the canisteruntil they canbe drawninto the intakemanifold.The canisterpurge valve allows the canisterto be purgedat a pre-determinedtime and engineoperatingconditions. Vacuumto the canisteris controlledby the canister purgevalve.Thevalve ISoperatedby the PCM. The PCM regulatesthe valve by switchingthe ground circuit on and off basedon engineoperatingconditions Whenenergized,the valve preventsvacuum from reachingthe canister.Whennot energizedthe valve allowsvacuumto purgethe vaporsfrom the canister. Duringwarm up and for a specifiedtime afterhot starts,the PCM energizes(grounds)the valve preventingvacuumfrom reachingthe canrster.Whenthe enginetemperaturereachesthe operatinglevelof about120°F (49°C) the PCM removesthe ground from the valve allowing vacuumto flow throughthe canisterand purgesvaporsthroughthe throttlebody. DuringcertainIdle conditions,the purgevalve may begroundedto control fuel mixturecalibrations. Thefuel tank is sealedwith a pressure-vacuumrelief filler cap.The reliefvalve in the cap is a safety feature,preventingexcessivepressureor vacuumin the fuel tank. If the cap is malfunctioning,and needs to be replaced,ensurethatthe replacementis the identicalcap to ensurecorrectsystemoperation,

OBD-IIEVAPSystemMonitor 89574go6

Fig. 5 Inspect the PCV valve for inner plunger movement.If the plunger is bound or sticking, replace the valve 89574g0r5

Fig. 3 . . . or mountedin a grommeton the valve cover

Somemodelshaveaddedsystemcomponents dueto the EVAPsystemmonitor incorporatedin the OBD-IIengrnecontrol system.A pressuresensoris mountedon the fuel tank which measurespressure insidethe tank,and a purgeflow sensormeasures the flow of the gasesfrom the canisterinto the engine. ThePCM canstoretroublecodesfor EVAPsystem performance,a list of the codesis providedlater

DRIVEABILITYAND EMISSIONS CONTROLS4-3 a. Usingthe handpump,apply 14.8 in. Hg of vacuumwith the engineat idle. In this condition, vacuumshould be maintained. b. Increasethe enainesoeedto 3000 rpm within 3 minutesof st&ting’the engine.Try applying vacuum.The vacuumshould leak. c. After 3 minuteshave elapsedafter starting engine,raisethe enginespeedto 3000 rpm. Apply 14.8 in. Hg of vacuum.Vacuumshould be maintainedmomentarily,afterwhich it will leak.

*The vacuumwill leak continuouslyif the altitude is 7200ft. or higher or the air temperatureis 122°F(50°C)or higher. 5. If the resultsof eithertest differsfrom specifications,the systemis not functioningproperlyand will requirefurtherdiagnosis. 1994-00 VEHICLES

p See Figure 9 895?4Q3:

Fig. 6 Tvoical evaoorative emission control system schematic EVAPORATIVE

EMISSION

CANISTER

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Fig. 7 Evaporativeemission canister commonly used on most models in this section.Normaltesting procedurescan be used,see EVAPSystemComponentTestingin this Section.

Fig. 8 To test the purge control operation, connectthe vacuum hose from the throttle body to a vacuumpump haveelapsedafterstartingvehicle.Apply 14.8 in. Hg of vacuum.Thevacuumshouldbe maintainedmomentarily,afterwhich it should leak.

COMPONENTTESTING

*The vacuumwill leak continuouslyif the altitude is 7,200ft. or higher, or the intake air temperatureis 122°F(50°C)or higher.

PurgeControl SystemCheck

6. If the test resultsdiffer from the desiredresults, the purgecontrol systemis not operatingproperly.

lB!M-93 VEHKLES EXCEPT 39911-92 2.UL DDHC TURBO

p See Figure 8 1. Disconnectthe redstripedvacuumhosefrom the throttle bodyand connectit to a handheldvacuum pump. 2. Plugthe opennippleon the throttlebody. 3. Usingthe handpump,applyvacuumwhile the engineis idling. Checkthat vacuumis maintainedor releasedas outlinedbelow: a. With the enainecoolantat 140°F f6O”C) or less-14.8 in Hgof vacuumIS maintained. ’ b. With the coolantat 158°F (70°C) or higher-14.8 in. Hg of vacuumis maintained. 4. With the enginecoolantat 158°F (70°C) or higher,run the engineat 3000 rpm within 3 minutes of startingvehicle.Try to applyvacuumusingthe handheld pump.Vacuumshould leak. 5. With the enginecoolantat 158°F (70°C) or higher,run the engineat 3000 rpm after3 minutes

199042 2.OL DDHC TURBO ENGINES 1, Disconnectthe purgeair hosefrom the intake hoseand plug the air intakehose. 2. Connecta handvacuumpumpto the purgeair hose. 3. Undervarious enginecondrtions,inspectthe systemoperation: a. Allow the engineto cool to a temperature of 140°F (60°C) or below. b. Startthe engineand run at idle. c. Using the hand pump,apply 14.8 in. Hg of vacuum.In this condition, the vacuumshould be maintained. d. Raisethe enginespeedto 3000 rpm. e. Using the handpump, apply 14.8 in. Hg of vacuum.In this condition, the vacuumshould be maintained. 4. Runthe engineuntil the coolanttemperature reaches158°F (70°C). Inspectsystemoperationsas follows:

*This test requiresthe use of a special purgeflow indicatortool, M8991700,or equivalent. 1. Disconnectthe purgehosefrom the EVAPcanister,thenconnectPurgeFlowIndicatorMB991700, or equivalentbetweenthe canisterandthe purge hose. 2. Theengineshouldbe warmedup to operating temperature,170-203°F. (80-95X), with all Irghts, fans and accessoriesoff. Thetransaxleshouldbe in Parkfor automaticsor Neutralfor manuals. 3. Runthe engineat idle for at least3-4 minutes. 4. Checkthe purgeflow volumewhenthe brake is depressedsuddenlya fewtimes. Thereading should be 2.5 SCFH(20cmlsec.) 5. If the volume is lessthanthe standardvalue, checkit againwith the vacuumhosedisconnected from the canister.If the purgeflow volume is less thanthe standard,checkfor blockagesin the vacuum port andvacuumhose,and also inspectthe evaporative emission purgesolenordand purgecontrol valve.

4-4 DRIVEABILITYAND EMISSIONS CONTROLS

Fig. 10 Attach a handvacuumpumpto the Rippleon the purge control valve

Fig. 11 Use a hand-heldvacuum gaugeto checkfor air-tightness-1990-93 2.OLnonturbo and 1993 2.OLturbo engines

6. If the purgeflow volume is at the standard value, replacethe EVAPcanister.

PurgeControlValve 7990-93 2. OL TURBO ENGINE

u See Figure 10 1. The purgecontrol valve is locatedto the right side of the battery.Removethe purgecontrol valve from the enginecompartment. 2. Connecta handvacuumpumpto the vacuum nippleof the purgecontrol valve. 3 Apply 15.7 in. Hg of vacuumand checkair tightness.Blow in air lightly from the evaporative emissioncanisterside nippleand checkconditrons as follows: l If there is no vacuumappliedto the valve-air will not pass. l When8.0 in. Hg of vacuum is appliedto the valve-air will passthrough. 4. Connecta handvacuumpumpto the positive pressurenippleof the purgecontrolvalve. 5. Apply a vacuumof 15.7 in. HQand checkfor air tightness.Thevalveshould beair tight. 6. If the resultsdiffer from the desiredoutcomes, replacethe purgecontrolvalve.

Fig. 15 Measure the resistance across the terminal of the solenoid valve-2.4L engine shown, others similar

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Fig. 12 Battery voltage applied to the terminals of the evaporative emission purge solenoid

EvaporativeEmissionPurgeSolenoid 1990-93 VEHICLES EXCEPT 1990-92 Z.OL OOHC TURBO

p See Figures 11, 12, and 13 1. Labeland disconnectthe 2 vacuumhoses from the purgecontrol solenoidvalve. 2. Detachthe electricalharnessconnectorfrom the solenord. 3. Connecta handvacuumpumpto the nipple whichthe red stripedvacuumhosewas connected. 4. Checkair tightnessby applyinga vacuumwith voltageapplieddirectlyfrom the batteryto the evaporativeemissionpurgesolenoidand without applying voltage.Thedesiredresultsareas follows: l With batteryvoltageapplied-vacuum should leak l With batteryvoltage not applied-vacuum should be maintained 5. Measurethe resistanceacrossthe terminalsof the solenoid.The desiredreadingis 36-44 ohms whenat 68°F (20°C). 6. If any of the test resultsdifferfrom the desired outcomes,replacethe purgecontrol solenoid.

89574Q28

1

Fig. 13 Measuring the resistance between the terminals of the evaporative emission purge solenoid / 7990-922.OLOOHCTURBOENGINE 1. Labeland disconnectthe 2 vacuumhoses from the purgecontrol solenoidvalve. 2. Detachthe electricalharnessconnectorfrom the solenoid. 3. Connecta handvacuumpumpto the nipple whichthe redstripedvacuumhosewasconnected. 4. Checkair tightnessby applyinga vacuumwith voltageapplieddirectlyfrom the batteryto the evaporative emissionpurgesolenoidand withoutapplying voltage.With batteryvoltageapplied,vacuumshould be maintained.Withoutvoltage,vacuumshouldleak 5. Measurethe resistanceacrossthe terminalsof the solenoid.Thedesiredreadingis 36-44 ohms whenat 68°F (20°C). 6. If any of the test resultsdiffer from the specifications,replacethe emissionpurgecontrol solenoid.

1994-00 VEHICLES

) See Figures 14 and 15 1. Tag and disconnectthe vacuumhosesfrom the solenoidvalve. 2. Detachthe harnessconnector. 3. Attacha hand-heldvacuumpumpto the nipple (A) of the solenordvalve,as shownin the accompanyingfigures. 4. Checkair tightnessby applyinga vacuumwith voltageapplieddirectlyfrom the batteryto the evaporativeemissionpurgesolenoidandwithout applying voltage.The desiredresultsareas follows: l With batteryvoltageapplied-vacuum should be maintained l With batteryvoltagenot applied-vacuum should leak 5. Measurethe resistanceacrossthe terminalsof the solenoid.Thestandardvaluesareas follows: a. 25-44 ohms whenat 68°F (20°C) 6. If any of the test resultsdiffer from the specifications,replacethe emission purgecontrol solenoid.

REMOVAL&INSTALLATION EVAPCanister p See Figure 16 1. Disconnectthe negativebatterycable. 2. If necessary,raiseand safelysupportthe vehicle, removethe front passengerside wheel,thenremovethe splashshield. 3. Tagand disconnectall necessaryvacuum lines. 4. Unfastenand retainingbolts and/or straps, then removethe canisterfrom the vehicle 5. lnstallahonis the reverseof the removalprocedure.

,

DRIVEABILITYAND EMISSIONS CONTROLS4-5

Fig. 16 Removethe canister retaining bolts and remove the canister

Volume air flow seneftr

I

Solenoid Valves u See Figures 17 and 18 I

1b Disconnect thenegative batterycable. 2. Labelandremove thevacuum andelectrical harness connections fromthepurgecontrolsolenoid. 3. Remove thesolenoidandmounting bracket fromtheenginecompartment. 4. Installation isthereverseoftheremovalprocedure. I

-

EVAPORATIVE

Manifold diierential

\

pressure m &a$34

Fig. 19 Typical EGRsystemschematie-2.4L engine shown, others similar

EMISSION

IPERATION 1 See Figure 19 TheExhaust GasRecirculation (EM) systemis lesigned to reintroduce exhaustgasintothecomrustionchambers, therebyloweringcombustion emperatures andreducing theformationof Oxidesof litrogen(NO,). Theamountof exhaustgasthatis reintroduced Ito thecombustion cycleis determined byseveral actors,suchas:enginespeed,enginevacuum, exraustsystembackpressure, coolanttemperature, Irottleposition.All EGRvalvesarevacuum operted.TheEGRvacuumdiagram for yourparticular chicleis displayed ontheVehicleEmission Control iformation(VECI)label.

:OMPONENTTESTiNG

uumports;pickoneandplugtheother.Thevacuum mustberetained. 4. For1990-93vehicles.blowairfrom1 oassageof theEGRto checkconditionasfoffows-a. With1.8in. Hg(6 kPa)of vacuumor less aooliedto thevalve.air shouldnotoassthrouah ttii valve. b. With8.5in. Hg(28.7kPa)of vacuumor moreappliedto thevalve,air shouldpass throughthevalve. 5. For1994-00vehicles,applyvacuum(specifiedbelow)andcheckthepassage of airbyblowing througheithersideof theEGRpassages, asfollows: a. With1.?Iin. Hgor lessof vacuumapplied to thevalve,air shouldblowoutof theopposite passae. b. %ith 8.7in. Hgor moreof vacuumapplies to thevalve,air shouldnotblowoutof theoppositepassage. 6. If theresultsarenotasdescribed, replacethe EGRvalve.

iGRValve t See Figure 20

EGRTemperatureLan*nr

1. Remove theEGRvalvefromthevehicle.Check :orstickingof plungercausedbyexcesscarbondelosits.If suchaconditionexists,cleanwithappro-

TheEGRtemperature sensoris usedonCalifornia vehiclesonly.TheEGRtemperature sensordetects

Fig. 20 Use a vacuumpumpto test the EGRI

a coni of water. then measure resistance imsthe water temperatureis increased II

I”..““.

u See Figure 21

Fig. 18 location of the evaporative emispurge solenoid-1990-93 2.OL DDHC

4-6 DRIVEABILITYAND EMISSIONSCONTROLS 4 n;rm.nnnn+ +h.n s,r,,~,,,,rn hnm frnm ‘h.n +hrotle thetemperature of thegaspassingthrough+h\n controlvalve.It converts thedetected temfIerature bodyEGRvacuumnipple.Connect a hand-held vacintoanelectricalvoltagesignalwhichis senttheve\ uumpumptothenipple. hicle’sPowertrain ControlModule(PCM).If thecir2. Starttheengine,thenslowlyraisethespeed cuitof theEGRtemperature sensoris broken,the andcompare withthefollowingspecifications. warninglightwill comeon. \ a. For1990-93vehides,checkto besurethe 1. Remove theEGRtemperature sensorfromthe vacuumraisedproportionally withtherisein enengine. gines eed. b. Ior 199450vehicles,thevacuumreading 2. PlacetheEGRsensorintowater.Whileinonthepumpshouldremainconstant. creasing thetemperature of thewater,measure the sensorresistance. Compare thevaluesto following EGRSolenoid specifications: a. 122°F50°C O-83kohmsresistance ES b. 212°Ft 100”P)-11-14 kohmsresistance 1990-93 L’EHICL , 3. If the resistance obtained varies significantly # See Figures 24 and 25 .,. .. nomspecmcaoom i, replacethesensor, 1. Labelanddisconnect theyellowandgreen ThermalVacuumValva stripedvacuumhosefromtheEGRsolenoid. 2. Detachtheelectricalharness connector. # See Figure 22 3. Connect a handvacuum pumptothenippleto whichthegreen-striped vacuumhosewascon1. Labelanddisconnect thevacuumhoseatthe netted. therm0valve. 4. Applyvacuum andcheckfor air-tightness 2. Connect a handheldvacuum pumpto thevacwhenvoltageis appliedanddiscontinued. When uumhoseonthetherm0valve. voltageisapplied,thevacuum shouldbemaintained. 3. Applyvacuumandchecktheair passage vacuum shouldleak. throughthetherm0vOrL’n %ultstothefnrm Whenvoltageis discontinued, 5. Measure theresistance between theterminals lowinqspecifications: of the solenoid valve. The resistance should be anttemperature of 122°F 36-44ohmsat68°F(20°C). vacuum leaks 6. If thetestresultsdifferfromthesoecifications. lanttemoerature of 176’F replacetheEGRsolenoid. (80°C)0; more-vacuumis maintained 4. If theresultsdifferfromthedesiredspecifica1994-00 VEHICLES tions,replace thevalve. # See Figure 26 EGRPort VacuumCheck

+ See Figure 23

*Before disconnectingthe vacuumhoses, tag . .them ** *. to assureproperconnectionduring mslatlanon

Fig. 26 EGRsolenoid check connections1. Taganddisconnect thevacuumhose(2.OL turboengine:yellowstripe,whiteandgreenstripe, 2.4Lengine:yellowstripeandwhitestripe)fromthe solenoidvalve. 2. Detach theharness connector. 3. Connect a hand-held vacuumpumpto theA nipple. 4. Checkairtightness byapplyingvacuumwith voltageapplieddirectlyfromthebatterytotheEGR controlsolenoidvalveandwithoutapplyingvoltage. 5. Forthe2.4Lengines, compare withthefollowing: . . a. Withbattery\roltagenotapplied,vacuum shouldbemaintainr sd. b. Withbattery\/oltageapplied,vacuum .I III I snouraiea~. 6. Usinganohmmeter, measure theresistance between thesolenoidvalveterminals. Theresistance shouldfall between 36-44ohmswhentheenaine temperature is 68°F(20°C).

REMOVAL&INSTALLATION EGRValve iI See Figure 27

2.OLengine(Federal)shown, otherssimilar

1I Disconnect thenegative batterycable. 2. Remove theaircleanerandintakehosesas required. 3. If necessary, detachtheEGRtemperature sensorconnector. 4. Taganddisconnect thevacuumhosefrom theEGRvalve. 5. Remove themounting boltsandtheEGR valvefromtheengine.

Fig. 27 The EGRvalve is retained to t take manifold with two bolts-2.4L e

.

DRIVEABILITYAND EMISSIONS CONTROLS4-7 6. Cleanthematingsurfaces onthevalveand theengine.Makesureto removeall gasketmaterial. 7. Inspectthevalvefor a stickingplunger, causedbyexcesscarbondeposits. If sucha conditionexists,cleanwithappropriate solventsovalve seatscorrectly. To install: 8. InstallEGRvalvewitha newgasketin place. 9. Installthemounting boltsandtightenasfollows:

* 1.5L,1.6L,and1.81engines-7-10ft. Ibs.(IO-15 Nm) l 2.OLengines-IO-15ft. Ibs.(15-22 NW l 2.4Land3.5Lengines-16ft. Ibs.(22 NW l 3.01engines-8ft. Ibs.(11Nm) 10. Connect thevacuumhoseto theEGRvalve. 11. If detached, attachtheEGRtemperature sensor. 12. Installtheaircleanerandair intakehosesas required. 13. Connect thenegative batterycable. EGRTemperatureSensor 1. Disconnect thenegative batterycable. 2. Detachtheelectricalconnector fromthesensor. 3. Remove thesensorfromtheengine. To install: 4. Installthesensorto theengineandtightento 8 ft. Ibs.(12Nm). 5. Attachtheelectricalconnector to thesensor. 6. Connect thenegative batterycable. Thermal VacuumValve 1. Disconnect thenegative batterycable.

6. Tightenthevalveto l‘j30 ft. Ibs.(20-40 Nm).Wheninstallingthevalve,donotallowthe wrenchto comein contactwiththeresinpartof the valve. 7. Attachthevacuumhoseto thevalve 8. Connect thenegative batterycable.

EGRSolenoid e See Figures 28, 29, 39, 31, and 32 1. Disconnect thenegative batterycable. 2. Labelanddisconnect thevacuumhosesfrom theEGRsolenoid. 3. Disconnect theelectricalharness fromthesolenoid. 4. Remove thesolenoidfromthemountino bracketandreplaceasrequired. To install: 5. Installthesolenoidto themounting bracket andsecurein position. 6. Attachtheelectricalconnector. 7. Connect thevacuum hosesto thesolenoid makingsuretheyareinstalledin theiroriginallocation. 8. Connect thenegative batterycable. I

Fig. 28 Locationof the EGRsolenoid-2.41 Galant shown

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Fig. 29 Release the retaining tab and remove the solenoid from the retaining 1bracket

Fig, 30 Matchmarkthe hoses on the solenoid . . .

.

4-8 DRIVEABILITYAND EMISSIONS CONTROLS

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Fig. 33 PCMmountinglocation-Mirage

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Fig. 35 PCM mounting location-1990-93 Galant

Mirage and 1999-00 Galant ) See Figure 33 *The PowertrainControlModule(PCM)is locatedabovethe passengerside kickpanel. 1. Disconnectthe negativebatterycable. 2. Removethe @lovebox, right side kickpanel and lowerpanelassemblies. 3. Unplugthe connectorsand removefasteners. Removethe PCM. 4. Installationis the reverseof the removalprocedure.

the oxygensensor.Afterthe enginecomesto operating temperature,the PCM will monitorthe oxygen sensorand correctthe air/fuel ratio from the sensor’s readings.This is whatis knownas CLOSEDLOOP operation. A HeatedOxygenSensor(H02S) hasa heatingelementthat keepsthe sensorat properoperatmgtemperatureduringall operatingmodes.Maintaining correctsensortemperatureat all times allows the systemto enterinto CLOSEDLOOPoperation sooner. In CLOSEDLOOPoperation,the PCM monitors the sensorinput (alongwith otherinputs)and adjusts the injectorpulsewidth accordingly.During OPEN LOOPoperation,the PCM ignoresthe sensorinput and adjuststhe injectorpulseto a preprogrammed value basedon other inputs.

TESTING # See Figure 37

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Fig. 38 PCMmountinglocation-Diamante

1994-98 Galant + See Figure 34 1, Disconnectnegativebatterycable. 2. Removeboth centerconsoleside panels. 3. Unplugthe wiring connectorand removethe mountinghardware.Slidethe PCM out the side. 4. installationis the reverseof the removalprocedure.

Diamanteand 1990-93 Galant ) See Figures35 and 38 *The PowertrainControlModule(PCM)is located behindthe glove box assembly. 1, If equipped,disarmthe air bagsystem 2. Removethe passengerside lower instrument paneland showerduct. 3. Removethe glove box striker,glove box, glove box outercasingand the screwbelowthe assembly. 4. Unplugwiring connectorand removemounting hardware.Slide out the PCM.

To install: 5. Installthe PCM with the mountinghardware. 6. Attachthe wire connector. 7. Installthe glove box striker,the glove box,the glove box casingand the screwbelowthe assembly.

8. Installthe passengerside lower instrument paneland the showerduct. 9. Reconnectthe negativebatterycable

OPERATION The Oxygen(02) sensoris a devicewhich producesan electricalvoltagewhenexposedto the oxygen presentin the exhaustgases.The sensoris mountedin the exhaustsystem,usuallyin the manifold or a boss locatedon the down pipe beforethe catalyst.Theoxygensensorsusedon some models are electricallyheatedinternallyfor fasterswitching whenthe engineis startedcold. Theoxygensensor producesa voltagewithin 0 and 1 volt. Whenthereis a largeamountof oxygenpresent(lean mixture),the sensorproducesa low voltage(lessthan 0.4~).When thereis a lesseramountpresent(rich mixture)it producesa highervoltage(0.6-I .Ov).Thestoichiometric or correctfuel to air ratio will readbetween0.4 and 0.6~.By monitoringthe oxygencontentand converting it to electricalvoltage,the sensoractsas a richleanswitch.Thevoltageis transmittedto the PCM. Somemodelshavetwo sensors,one beforethe catalystand oneafter.This is donefor a catalystefficiencymonitorthat is a part of the OBD-IIengine controls.Theone beforethe catalystmeasuresthe exhaustemissionsright out of the engine,and sends the signalto the PCM aboutthe stateof the mixture as previouslytalkedabout.Thesecondsensorreportsthe differencein the emissionsafterthe exhaust gaseshavegonethroughthe catalyst.This sensorreports to the PCM the amountof emissionsreduction the catalystis performing. The oxygensensorwill not work until a predeterminedtemperatureis reached,until this time the PCM is runningin whatas knownas OPENLOOP operation.OPENLOOPmeansthat the PCM has not yet begunto correctthe air-to-fuel ratio by reading

93154p36

Fig. 37 The HD2Scan be monitoredwith an appropriate and Data-streamcapable scan tool

Do not pierce the wires when testingthis sensor;this can lead to wiring harnessdamage. Backprobethe connectorto properly read the voltage of the HD2S. 1. Disconnectthe H02S. 2. Measurethe resistancebetweenPWRand GNDterminalsof the sensor.Resistanceshouldbe approximately6 ohmsat 68°F (20°C) If resistanceis not within specification,the sensor’sheaterelement is faulty. 3. With the H02S connectedand enginerunning, measurethe voltagewith a Digital Volt-Ohmmeter (DVOM)betweenterminalsHD2Sand SIGRTN (GND)of the oxygensensorconnector.Voltage shouldfluctuatebetween0.01-l .Ovolts. If voltage fluctuationis slow or voltageis not within specification, the sensormay befaulty.

REMOVAL&INSTALLATION ) See Figures 38, 39, 40, 41, and 42 1. Disconnectthe negativebatterycable 2. Raiseand supportthe vehiclesafely.

JSCONTRiLS4-9 DRIVEABILITYAND EMISSIOP

I

3. Labelanddisconnect theH02Sfromtheenginecontrolwiringharness. *Lubricate the sensorwith penetratingoil prior to removal. 4. Remove thesensorusinganoxygensensor wrenchoranothersuitabletool. To install: 5. Installthesensorinthemounting bossand tightento 27-33ft. Ibs.(37-45Nm). 6. Connect theenginecontrolwiringharness to

1Fia. ..----. tnfitinn ----...= and -..- nin r... Incations *- -v- 43 -- IAC ---- mntnr

1

hl-li)r\,,.l 0 ,.l.-.f.l, .T‘fi.LI

KtMUVHL

i% IN3 I ALLA I IUN

See Fiaurr!

d4

1. Disconnect thenegative batterycable. 2. Remove theaircleanerintakehose. 3. Remove anynecessary hosesfromtheIAC

move the oxygen sensor. The socket con-

OPERATION TheIdleAirControl(IAC)motoris a DCstepper motorcontrolledbythePCM.TheIACcontains a built-inpositionsensorwhichdetectstheamountof openingof themotor.Thepositionsensoroutputsa pulsesignalthatthePCMreceives andusesto adjust themotorto properlymaintain thecorrectidlespeed of theengine.

TESTING

motor. 5. Remove theretainino remove ..._IAC ._ ybolts -_.._and -..-._... -._the fromthethrottlebody. C The inc.hllrrti~n a11o IIIJL(IIIoLIuII is thereverseof removal. ReplaietheIACgasket.

I

ti See Figure 43

then remove the sensor from

Placea stethoscope (alongscrewdriver works also,justplacethescrewdriver ontheIACandplace yourearonor nearthehandle)ontheIACmotor. Haveanassistant turnthekeyONwiththeengine OFF,andlistento theIACmotor.Severalclicks shouldbeheardasthesteooermotormoves.If the clicksareheard,thedriverinthePCMandthecircuit areOK. If thedriverandcircuitstestOK,detachtheconnectarfromIACmotor.Usinganohmmeter, probe theconnector ontheIACmotor,NOTTHEWIRING HARNESS> between pins2 and1, andpins2 and3. Resistance shouldmeasure between 26-33ohms.If theresistance valuesaredifferentreplace theIAC motor.If thetestsbetween pins1,2, and3 arewithin specification, checktheresistance between pins5 and4, andpins5 and6. Resistance shouldmeasure between 26-33ohms.Iftheresistance valuesaredifferentreplace theIACmotor.

-w ‘. l-!AEz?rn~ nswltch) 2 Idleanconh0l motor tor is usually mounted

4-10 DRIVEABILITYAND EMISSIONS CONTROLS

I

OPERATION TheEngineCoolantTemperature (ECT)sensorresistancechanges in response to enginecoolanttemperature. Thesensorresistance decreases asthe coolanttemperature increases, andincreases asthe coolanttemperature decreases. Thisprovidesa referencesignalto thePCM,whichindicates engine coolanttemperature. ThesignalsenttothePCMby theECTsensorhelpsthePCMto determine sparkadvance, EGRflowrate,air/fuelratio,andengine temperature. TheECTis atwowiresensor,a 5volt reference signalis sentto thesensorandthesignal returnis baseduponthechangeinthemeasured resistancedueto temperature.

89574PlO

Fig. 47 Another methodof testing the EC1 is to submergeit in cold or hot water and 1check resistance

Fig. 50 Use a deep socketand an extension to reach the ECTsensor. 1 ,

TESTING ti See Figures 45, 46, 47, and 48 1. Draintheenginecoolantto a levelbelowthe intakemanifold. 2. Disconnect thesensorwiringharnessandremovethecoolanttemperature sensorfromtheengine. 3. Placethetemperature sensingportionof the sensorintoa panof hotwater.Usea thermometer to monitorthewatertemperature. 4. Measure theresistance acrossthesensorterminalswhilethesensoris inthewater.Comoare obtainedreadingto specifications: ’

89574Pll

Fig. 48 The ECTcan be monitored with an appropriate and Data-streamcapable scan tnnl

a. Watertemperature of 32°F(0°C~5.1-6.5 kilo-ohmspresent b. Watertemperature of 68°F(2O”C)-2.1-2.7kilo-ohmspresent c. Watertemperature of 104°F(4O”C)--0.9-l .3 kilo-ohmspresent d. Watertemperature of 176°F(8O”Ck, 0.26-0.36kilo-ohmspresent differsgreatlyfromstandard 5. If theresistance value,replacethesensor. REMOVAL&INSTALLATION 93154pos

Fig. 45 Unplug the ECTsensor electrical connector

Fig. 51 . . . then remove the ECTsensor 1from the thermostathousing 1

u See Figures49, 50, 51, and 52 1. Disconnect thenegative batterycable.

Fig. 52 Before installation, coat the threads 2. Draintheenginec(Iolantto a levelbelowthe intakemanifold. 3. Unplug1 thesensorwiringharness, 4. Unthreac dandremovethesensorfromtheengine. To install: 5. Coatthethreadsof thesensorwitha suitable sealantandthreadintothehousing. 6. Tightenthesensorto 22ft. Ibs.(30Nm). 7. Refillthecoolingsystemtotheproperlevel. 8. Attachtheelectricalconnector to thesensor securely. 9. Connect thenegative batterycable.

OPERATION + See Figure 53 Fig 48 Test the resistance of the ECTsenFig. 49 Unplug the ECTsensor electrical 1soracross the two sensor pins g3154p30 ---..^-s--

TheIntakeAirTemperature (IAT)sensordetermines the air . _ intake ..-.._niani- temnerature ._ r_ -.-._ enterinn _.._. J the!

DRIVEABILITYAND EMISSIONS CONTROLi4-11 b. Sensortemperature of 68°F(2O”C)--‘

2.>3.0kilo-ohms

~1

c. Sensortemperature of 176°F(SO*C)0.30-0.42kilo-ohms 5. Measure thesensorresistance whileheating thesensorareawitha hairdryer.Asthetemperature ofthesensorincreases, sensorresistance shouldbecomesmaller. 6. Ifthemeasured resistance deviates fromthe standard valueortheresistance remainsunchanged, replace theairflowsensorassembly.

1

fold.Resistance changes in response to theambient airtemperature. Thesensorhasa negative temperaturecoefficient. Asthetemperature of thesensor risestheresistance acrossthesensordecreases. Thil provides a signaltothePCMindicating thetemperatureof theincoming aircharge.Thissensorhelpsthe PCMto determine sparktimingandair/fuelratio.Information fromthissensorisaddedto thepressure sensorinformation to calculate theair massbeing senttothecylinders. TheIATreceives a 5-voltreferencesignalandthesignalreturnis baseduponthe changein themeasured resistance duetotemperature.

REMOVAL&INSTALLATION TheIATsensoris partof theMassAir Flow(MAF) sensor.TheIATsensorcannotbereplaced separately.Referto MAFsensorremovalandinstallation inthissection.

-

a9574g72

Fig. 56 IATsensorterminal identification;1990-93 Galant

I

TESTING

OPERATION TheMassAirFlow(MAF)sensordirectlymealresthemassof airbeingdrawnintotheengine. ?hesensoroutputis usedto calculate injectorpulse width.TheMAFsensoris whatis referred to asa “hot-wiresensor”.Thesensorusesa thinplatinum wirefilament,woundona ceramicbobbinandcoated withglass,thatis heatedto 417°F(200°C)abovethe amh+en+ nir+PmnPrfijre andsubiected to theintake A “cold-wire”is usedinsidetheMAF aimowstream. sensorto determine theambient airtemperature. Batteryvoltage,a reference signal,anda ground signalfromthePCMaresuppliedto theMAFsensor. rho ~pn**rrp+++rns a signalproportionate to thecurire”attherere.Theincreased airflowacrossthe sa coolingfan,loweringtheresistanceandrequirmomorecurrentto maintain theteme^-‘.._^ ^I LL^ pe~a+ure UImewire.Theincreased currentis measuredbythevoltageinthecircuit,ascurrent increases, voltageincreases. Astheairflowincreases thesignalreturnvoltageof a normallyoperating MAF sensorwill increase. ..I._

b See Figures 54, 55, 56, 57, and 58

~

..-..

.“..‘r-,u..

I

Intake air temperaturf sensor

, ~~1 -

II

Fig. 54 Testing the resistance of the IAT sensor across the two sensor pins 89574g74

Fig. 58 Measurethe intake air temperature ---1-a---- L..- L--1. .. .*a -----_ resuirance sensor wnoe nearmg ir wnn a 1 hair drier

Fig. 55 The IAT sensor can be monitored with an appropriate and Data-streamcapable scan tool

1. Detachtheairflowsensorelectricalconnector. theresistance between terminals No. 2. Measure 4 andNo.6 of theelectricalconnector, exceptonthe 2.OLDOHCturboengine. 3. ff equipped withthe2.OLDOHCturboengine, measure theresistance between terminals No.6 and No.8 ofthesensorelectricconnector. testreadings to thefollowingspecifi4. Compare cations: a. Sensortemperature of 32°F(O“C)-5.3-6.7kilo-ohms

TESTING 1. Usinga multimeter, checkforvoltagebybacknrr\hinn+hnMAFsensorconnector. theignitionkeyON,andtheengineOFF, .^-^ :tha veriryt‘hatmelt: IS-’al ‘.txt I~“<\In,“..,E; \mltr lvllQhahrman UtiLnbtill ,,,= BAT-T itndGNDterminals of theMAFsensorconnector.If voltaaeis notwithinspecification, checkpower andgroundcircuits andrepairasnecessary. 3. WiththeignitionkeyON,and,theengineON, verifythatthereis at least4.5voltsbetween theSIG andGNDterminals of theMAFsensorconnector. If voltageis notwithinspecification, checkpowerand groundcircuitsandrepairasnecessary. 4. WiththeignitionkeyON,andtheengineON, checkvoltagebetween GNDandSIGRTNterminals. Voltageshouldbeapproximately 0.34-l.96volts.If voltageis notwithinspecification, thesensormaybe faulty. /

.

4112 DRIVEABILITYAND EMISSIONS CONTROLS REMOVAL&INSTALLATION + See Figures 59 thru 67 1, Disconnect thenegative batterycable. 2. Release theretaining clipsfromtheaircleaner housing. 3. Loosentheclampontheairoutlettubeatthe throttlebody. 4. Remove thebreather hoseanddetachtheconnectorfromtheMAFsensor. 5. Remove theairoutlettubeandupperhousing fromthelowerhousing. 6. Loosenthehoseclampandslidetheoutlet hoseoff of theMAFsensor. 7. Remove thefoursensor-to-air cleanerhousing retaining nuts. 8. Remove thesensorfromtheaircleanerupper housing.

Fig. 59 Releasethe retaining clips from the air cleaner housing

*Handle the sensorassemblycarefully, protecting it from impact,extremesof temperature and/orexposureto shopchemicals. 9. Installation isthereverseof theremovalprocedure.

OPERATION Themostimportant information for measuring enginefuelrequirements comesfromtheManifoldAbsolutePressure (MAP)sensor.Usingthepressure andtemperature data,thePCMcalculates theintake air mass.It is connected totheengineintakemanifoldandtakesreadings of theabsolutepressure.

Atmospheric pressure is measured bothwhenthe engineisstartedandwhendrivingfullyloaded,then theoressure sensorinformation isadiusted accordingly.

TESTING \ 1. Usinga multimeter, checkforvoltagebybackprobingtheMAPsensorconnector. 2. WiththekeyON,andtheengineOFF,verify thatthereis at least4.8voltsbetween theSIGand GNDterminals of theMAPsensorconnector. If voltageis notwithinspecification, checkpowerand groundcircuitsandrepairasnecessary. 3. WiththekeyON,andtheengineON,check thevoltagebetween GNDandSIGRTNterminals. Voltageshouldbeapproximately between 0.8and2.4 volts.Ifvoltageis notwithinspecification, thesensor rnaybefaulty.

Fig. 61 Detachthe breather hose from the air inlet tube

Fig. 62 loosen the clamp on the air outlet tube at the throttle body . . .

53154p12

then slide the outlet hose off of

Fig. 67 . . . then remove the MAF sensor from the air cleaner cover

DRIVEABILITYAND EMISSIONS CONTROiS4-13 4. If thevoltaoecheckin sbo3 wasOK.then checkthevoltage-between GND’and SIGRTNterminalsandsuddenly depress theaccelerator, thevoltageshouldriseandstayat2.4volts.If thevoltage doesnotstayat2.4volts,replacetheMAPsensor.

REMOVAL&INSTALLATION

'

ti See Figures 68, 69, and 70 1. Disconnect thenegative batlery cable. 2. Detachtheconnector for thleMAPsensor. ig screws. 3. Remove thesensormountir 4. Liftthesensorupandremoveit fromtheintake manifold. 5. Theinstallation isthereverseof removal.

OPERATION TheThrottlePosiiInn ITPl smsnr is 8 Dotentiometerthatprovides a signalto thePCMthatis directly proportion: il tothethrottleplateposition.TheTP sensoris rriountedonthesideof thethrottlebody andis connected tothethrottleplateshaft.TheTP sensormonitorsthrottleplatemovement andposition,andtransmits anappropriate electricalsignalto thePCM.ThesesignalsgrpIIQX-I hvrhoPCMtoadjust the air/flnIUyImivtlI ,,,,,,,:re,sparktimingandEGRopera“-------liU ngto engineloadat idle,partthrottle,or WI I dLfUl fullthrottleTheTPsensoris notadjustable. The c ..- TP lensor receives a 5 voltreference signal anda groundcircuitfromthePCM.A returnsignal circuitis connected to a wiperthatrunsona resistor internallyonthesensnrThPfmth@r rhothrottleis opined the winnr mrJvesalongtheresistor, atwide en throttle, the wiper essentially creates a loopbeoP tweenthereference signalandthesignalreturnreturningthefull or nearlyfull 5 voltsignalbackto the PCM.Atidle,thesignalreturnshouldbeapproxirnzrtely0.9volts. ti-*

-*lY”,

.I,”

..,y’V,

\*.

,

WI...,".

*.,

.

sm4p10

I

Fig. 73 Testing the operation of the poten-1 tiometer inside the TP sensor while slowly 1 openingthe throttle

111

TF iSTING ) See Figures71,72, 73, and 74 Fig. 68 Detachthe electrical connectorfrom the MAPsensor

taining bolts . . .

1. WiththeengineOFFandtheignitionON, checkthevoltageatthesignalreturncircuitof theTP sensorbvcarefullvbackorobina theconnector using aDVOM: . ”

WMp,l Fig. 71 Testingthe SIGcircuit to the TPsen-

Fig. 74 TheTPsensorcanbe monitoredwith an appropriate and Data-stream capable 2. Voltageshouldbebetween 0.2and1.4voltsat idle. 3. Slowlvmovethethrottleoullevto theWide OpenThrottle(WOT)positionandwatchthevoltage ontheDVOM.Thevoltageshouldslowlyriseto slightlylessthan4.8voltsatWOT. 4. If novoltageis present, checkthewiringharnessfor supplyvoltage(5.0volts)andground(0.3 voltsor less),byreferringto yourcorresponding wiringguide.If supplyvoltageandgroundarepresent,butnooutputvoltagefromTP,replacetheTP sensor.If supplyvoltageandgrounddonotmeet specifications, makenecessarv , reoairsto theharness or PCM.

REMOVAL&INSTALLATION # See Figures75 and 76 1. Disconnect thenegative batterycable. 2. Disconnect thewiringharness fromtheTP sensor. 3. Remove thetwosensormounting screws,then pulltheTPsensoroffof thethrottleshaft. To install: 4. Carefullyslidetherotarytangsonthesensor intopositionoverthethrottleshaft.thenrotatethe sensorclockwise totheinstalledposition. then remove the sensor from the intake manifold. Inspect the tip of the sensor and replace if damagedor plugged

Fig. 72 Testing the SIG RTNcircuit of the TP sensor

.

4-14 DRIVEABILITYAND EMISSIONS CONTROLS sorto bebeyondthescopeof thedo-it-yourself mechanic.Thesensorcanbemonitored withanappro2 oriatescantoolusinaa datadisolavor otherdata streaminformation. hollowtheinstructions included withthescantoolfor information onaccessing the data. REMOVAL&INSTALLATION 1,6L, 2.01 DDHCand 1997-00 I .8L Engines 1I Disconnect thenegative batterycable. 2. Detach theelectricalthrottlebodystay. 3. Remove thesensorretaining screws. 4. Remove thesensorassembly fromtheengine. To install: 5. Installthesensorintheopeningin theengine andtightenthesensorretaining screws. 6. Installthethrottlebodystay. 7. Attachtheelectricalconnector to thesensor. 8. Connect thenegative batterycable.

93154pm

Fig. 75 Unplugthe TP sensor connector

1.5L, 2.41, 3.OLSDHC,3.5L, and 1993-96 1.8L Engines ti See Figure 77

Thecamshaft positionsensorontheseenginesis locatedin thedistributor. Referto thedistributorremovalandinstallation procedure in Section2. 3.01 DDHCEngine p See Figure 78 1. Disconnect thenegative batterycable. 2. Remove thetimingbelt,asoutlinedinSection 3 ofthismanual. 3. Unplugthesensorconnector. 4. Unfasten theretainingbolts,thenremovethe sensorfromthevehicle. 5. Installation isthereverseof theremovalprocedure.

OPERATION TheCrankshaft Position(CKP)sensor(alsoreferredto asthecrankanglesensor)sensesthecrank angle(pistonposition)of eachcylinderandconverts

Fig. 76 The TP sensor is securedwith two retaining bolts

Failure to install the TPsensor in this manner may result in sensordamageor high idle speeds.

, camshaft position sensor)

*The TPsensor is not adjustable.

=1541po9 Fig. 77 The CMPsensor Is built into the distributor-l .8L engine shown

5. Installandtightenthesensormounting “n,zw.m 6. Connect thewiringharness to thesensor. 7. Connect thenegative batterycable. JU

cw3,

OPERATION Thecomputer controlmoduleusestheCamshaft Position(CMP)sensorto determine thepositionof theNo.1 pistonduringitspowerstroke.Thissignal is usedbythecomputer controlmoduleto calculate fuelinjectionmodeof operation. If thecamsignalis lostwhiletheengineis running,thefuelinjectionsystemwill shifftoa calculatedfuelinjectedmodebasedonthelastfuelinjectionpulse,andtheenginewill continue to run. TESTbiG Thissensorproduces anA/Cvoltagesignalbased oninformation gathered whiletheengineis running. TestingtheCMPsensorrequiresseveralspecial toolsthatareveryexpensive to purchase. Dueto this fact,weat Chiltonhavedetermined testingthissen-

Camshaft position sensor

I .

\ \ Fig. 78 CMPsensor mounting-3.01 DDHCengine

93154gll

DRIVEABILITYAND EMlSSlONSCONTROiS 4-15 it intoa pulsesignal.ThePCMreceivesthissignal andthencomputes theenginespeedadcontrolsthe fuelinjectortimingandignitiontimingbasedonthis input.

TESTING Thissensorproduces a pulsesignalbasedon informationgathered whiletheengineis running.TestingtheCKPsensorrequiresseveralspecialtoolsthat areveryexpensive to purchase. Duetothisfact,weat Chiltonhavedetermined testingthissensorto bebeyondthescopeof thedo-it-yourself mechanic. The sensorcanbemonitored withanappropriate scan toolusinga datadisplayor otherdatastreaminformationFollowtheinstructions includedwiththe scantoolfor information onaccessing thedata.

89574ga3

are built into the

REMOVAL<jSTALLATlON 2.OLSDHCand 1990-96 1.5L Engines 9 See Figure 79 TheCKPsensorontheseenginesis locatedinthe distributor. Referto thedistributorremoval andinstallationprocedure in Section2. 1.6L and 2.OLDDHCEngines b See Figure 80 1. Disconnect thenegative batterycable. 2. Detach theelectricalthrottlebodystay. 3. Remove thesensorretainingscrews, 4. Remove thesensorassembly fromtheengine. To install: 5. Installthesensorintheopeninaintheenaine andtightenthesensorretaining’screvk 6. Installthethrottlebodystay, 7. Attachtheelectricalconnector to thesensor. 8. Connect thenegative batterycable. 1.8L, 2.4L, 3.OL(SOHCand DOHC),3.5L, and 1997-00 1.5L Engines b See Figures 81 and 82 1. Disconnect thenegative batterycable. 2. Remove thetimingbelt,asoutlinedinSection 3 of thismanual. 3. Unplugthesensorconnector. 4. Unfasten theretainingbolts,thenremovethe sensorfromthevehicle. 5. Installation isthereverseoftheremovalprocedure.

Fig. 81 Removethe two CKPsensor retain- ’ Fig. 82 Removethe sensorand slide the reing bolts-2 4L engine shown others simluctor wheel off of the crankshaft-2 4L en ilar . ’ 1 / gfne shown, others similar ’ -1

EMISSIONS AND ELECTRONIC CONTROL COMPONENT LOCATIONS-l .8L ENGINE

1. 2. 3. 4. 5.

MassAir Flow(MAF)sensorw/integratedIntakeAir Temperature(IAT)sensor EngineCoolantTemperature(ECT)sensor CamshaftPosition(CMP)sensor ExhaustGasRecirculation(EGR)valve IdleAir Control(IAC)valve (locatedon undersideof throttle body)

6. 7. 8. 9. 10.

ThrottlePosition(TP)sensor ManifoldAbsolutePressure(MAP)sensor Evaporativeemissionspurgesolenoid PositiveCrankcaseVentilation(PCV)valve EGRcontrol solenoid

EMISSIONS AND ELECTRONICCONTROL COMPONENT LOCATIONS-2.4L

1. 2. 3. 4. 5. 6.

CrankshaftPosition(CKP)sensor PositiveCrankcaseVentilation(PCV)valve ManifoldAbsolutePressure(MAP)sensor ExhaustGasRecirculation(EGR)solenoid ThrottlePosition(TP)sensor ExhaustGasRecirculation(EGR)valve (locatedon undersideof throttle body)

7. 8. 9. 10. ~11. 12.

ENGINE

Evaporativeemissionspurgesolenoid MassAir Flow (MAF)sensorw/integratedIntakeAir Temperature(IAT)sensor IdleAir Control(IAC)valve(locatedon undersideof throttle body) CamshaftPosition(CMP)sensor(locatedinsidedistributor) EngineCoolantTemperature(ECT)sensor EVAPcanister(locatedunderfender)

.

4-18 DRIVEABILITYAND EMISSIONS CONTROLS ;

Name

Name

Symbol Heated

oxygen

N s

lamp

, / /

Q

lgnrtion trmrng adjustment

/

M

Injector

p B

Intake air temperature

Distributor (wrth bulk-in camshaft position ignition coil and rgnrtron power transistor)

j , I

compressor

Air condrtioning

swatch

Check engrne/Malfunction Crankshaft

clutch relay

Indicator

position sensor

Data link connector sensor,

j I j

sensor (Rear)

;

Arr conditioning

1 Idle air control motor

Manifold

absolute

Multrport

fuel in]ectron

connector

sensor

pressure

sensor

(MFI) relay

Symbol ”

/

F

j

D

! /

O K

1

H

i

T

j

A

/ / I

L G

EGR solenord

i

J

Engine control module

I

u c

I/

I

I Power steering pressure switch / Throttle position sensor (with burl&In closed throttle position I

Fuel pump check terminal

j

E

i Vehicle speed sensor (reed switch)

/

R

Heated oxygen

I

w

I

i

-

Engine coolant temperature Evaporative

emission

sensor

purge solenoid -

sensor (Front)

PaWNeutral

positron switch

switch)

_ I

I

93154go1

Ilectronic engine control component locations-l

51 engine

DRIVEABILITYAND EMISSIONS CONTROLS4-19

Name

Symbol

Name

Air conditroner

relay

0

ignition

cot1 (power

Air condrtroner

switch

H

lgnrtion

trmtng

A

Inhibitor

E

Injector

Air flow sensor (rncorporatrng ature sensor and barometric Crank

angle

sensor

1 EGR control

and top dead center

solenord

EGR temperature

valve

sensor

Engine

control

unit

Engine

coolant

temperature

I Fuel pump I idle posrtron Idle speed

check

Intake arr temperpressure sensor) sensor



sensor

servo

(stepper

Q

Oxygen

U

Power Purge

R



V

relay

1

sensor

control

T

I Self-dragnosis

1

D

1 Throttle

L

Vehicle

011 pressure solenord

positron speed

N

1

F

steering

1

motor)

M terminal

K

1 MPI control

J

0

terminal

swatch control

1



adjustment

switch

Symbol

transrstor)

switch

valve

P

I I

terminal sensor sensor

I

(reed

swatch)

s c

I I

G 93154go;

ilectronic engine control component lochions-

.6L enuine

4-20 , DRIVEABILITYAND EMISSIONS CONTROLS

Air conditioning

compressor

Air conditlonrng

switch

Name

Symbol

Name

Crankshaft positron sensor and camshaft tion sensor

Ignition coil (ignition

J

clutch relay

posi-

Ignition trming adjustment

G

Injector Multiport

s

module

Park/neutral

N A

positron switch

Power steering

~ emrsslon

relay

pressure



switch

M U

Q

Engrne coolant temperature Evaporative

fuel injection

L

_

Engine control

R I

Oxygen sensor

~ sensor

terminal

F

K



EGR temperature

transistor)

’

EGR solenoid

power

0

~ Data link connector

Symbol

H

purge solenoid

T

Fuel pump check terminal Idle speed control motor (closed throttle POW tron swatch, tdle speed control motor positron sensor)

Throttle

position

sensor

Vehicle

speed sensor (reed switch)

D

E

sensor

!

c

Electronicengine control componentlocations-2.01 SOHCengine

P

Volume air flow sensor (incorporating intake arr temperature sensor and barometric pressure sensor)

B

93154g

DRIVEABILITYAND EMISSIONS CONTROLS4-21

Heated oxygen sensor c NOTE The “Name” column is arranged in alphabetical order. ilectronic engine control componentlocations-2.01 DOHCengine

4-22 DRIVEABILITYAND EMISSIONS CONTROLS Symbol

Name

Name

Symbol I

Arr condrttontng

compressor

Air condrbonrng

swrtch

Camshaft sensor

posrtron

sensor

clutch

relay

and crankshaft

posrtron

P

lgnrtton

S

Idle arr control

engrne/malfunctton

rndtcator

L

lamp

Knock R

FD~agnostrc output termtnal I mode control termrnal EGR solenoid 1995 models>


and dtagnostrc

California

and for Federal

EGR temperature sensor Engrne

control

module

Engine

coolant

temperature

Evaporatrve

emrssron

Heated

oxygen

Ignition

cot1 (ionrtron

test

California

from

and for

adjustrng

terminal

motor

(stepper

H motor)

B

Injector

~ Check

trmrng

N sensor

I

Mujttport

U

Park/neutral

F

Power

E

Throttle , swrtch)

fuel qector

(MFI)

oosrtron

swatch

steering

pressure

posrtlon

sensor

relay _

T Q M

swatch

fwrth

burlt-In

closed

I I

throttle

T

purge

sensor

0

Variable burlt-tn

tnductton rnductron

solenord

C

Vehrcle

speed

sensor

G Dower

transistor)

K

control motor (DC motor) (wrth control valve posrtron sensor)

sensor

(reed

J R

swatch)

Volume arr flow sensor (with burlt-In Intake arr temperature sensor and barometric pressure sensor)

A I

I

93154go7

ilectronic engine control componentlocations-3.01 SOHCengine

DRIVEABILITYAND EMISSIONS CONTROLS4-23

Electronic engine control component locations-3.01

DOHC engine

.

4-24 DRIVEABILITYAND EMISSIONS CONTROLS Name

Symbol

Air conditioning Camshaft Crankshaft

Symbol

1 Heated oxygen sensor (Rear)

C

switch

T

/ Idle arr control motor

H

position sensor

I

ignition coil (Ignition power transistor)

R

S

Injector

N

Check engine/malfunction

clutch relay

1 Name

L

Air conditioner

compressor

indicator

lamp

position sensor

M

Manifold differential

U

Multiport fuel injection relay

EGR solenoid

E

Park/Neutral

Engine control module

W

Power steering pressure

switch

A

0

Throttle position sensor throttle position switch)

(with built-in closed

G

Data link connector

Engine coolant temperature Evaporative

emission

sensor

purge solenoid

pressure

sensor

(MFI) relay/Fuel

F pump

position switch

V Q,

D

Vehicle speed sensor

P

Fuel pump check terminal

J

Heated oxygen sensor (Front)

B

Volume air flow sensor (with built-in intake air temperature sensor and barometric pressure sensor)

K

ilectronic engine control componentlocations-3.51 engine

DRIVEABILITYAND EMISSIONS CONTROLS4-25 NAME Air conditioning

I

Crankshaft

compressor

clutch relay

position sensor

Data link connector

I

Distributor (built-in camshaft sensor and ignition coil)

position

Euaporatiue.emission l Evaporatiw5+eiiission

.

SYMBOL

Knock sensor

D

A

Left bank heated oxygen sensor (front)
T

Left bank heated oxygen sensor (rear)

J

Manifold differential pressure sensor

sensor

B

IQ B

ventilation

Y

solenoid

pressure sensor

N I

I M F

I

purge solenoid

Fan controller Fuel tank differential

NAME

K

I

EGR solenoid 1 Engine coolant temperature

SYMBOL

Multiport fuel injection (MFI) relay/fuel pump relay 1 Park/neutral

position switch

Powertraincontrol I Powersteering

module pressure switch

I K

IR LJ L

0

Right bank heated oxygen sensor (front)

C

V

Right bank heated oxygen sensor (rear)

E

Heated oxygen sensor (front)

W

1 Heated oxygen sensor (rear)

I X

Idle air control motor

I

Injector

G

Throttle position sensor 1 Vehicle speed sensor

H

Ip

Volume air flow sensor (with built-in intake air S temperature sensor and barometric pressure sensor) I

I

I

I

93154@3

lectronic engine control componentlocations-199940 Galantwith the 3.OLSOHCengine

4-26 DRIVEABILITYAND EMISSIONS CONTROLS

The PowertrainControlModule(PCM) monitors the signals of inputand outputsensors,someall the time and othersat certaintimes and processeseach signal.Whenthe PCM noticesthat an irregularityhas continuedfor a specifiedtime or longerfrom when the irregularsignal was initially monitored,the PCM judgesthat a malfunctionhasoccurredand will memorizethe malfunctioncode.The code is then storedin the memoryof the PCM and is accessible throughthe datalink (diagnosticconnector)with the use of an electronicscantool or a voltmeter.

CHECKENGINE/MALFUNCTION INDICATORLIGHT Amongthe on-boarddiagnosticitems,a check engine/malfunctionindicatorlight comeson to notify the driver of a emissioncontrol componentirregularity. If the irregularitydetectedreturnsto normalor the PCM judgesthat the componenthasreturnedto normal,the checkengine/malfunctionindicatorlight will beturnedoff Moreover,if the ignition is turnedOFF and thenthe engineis restarted,the check engine/malfunctionindicatorlight will not beturned on unttl a malfunctionis detected. Thecheckengine/malfunctionindicatorlight will comeon immediatelyafterthe ignition switch is turnedON. The light shouldstaylit for 5 seconds andthenwill go off. This Indicatesthatthe checkengine/malfunctionindicatorlamp is operatingnormally.This doesnot signify a problemwith the system.

l Whenmeasuringsupplyvoltageof PCM-controlled componentswith a circuit tester,separate1 testerprobefrom another.If the 2 testerprobesaccidentallymakecontactwith eachotherduring measurement,a short circuit WIIIresultand damagethe PCM.

# See Figures 83

and84

WITHASCANTOOL

Rememberthatthe diagnostictroublecode identification refersonly to the circuit, not necessarilyto a specificcomponent.Forexample,fault code 14 may indicatean error in the throttleposition sensorcircuit; it doesnot necessarilymeanthe TPSsensorhas failed Testingof all relatedwiring, connectorsand the sensoritself maybe requiredto locatethe problem. The PCM memoryis capableof storing multiple codes.During diagnosisthe codeswill betransmltted in numericalorderfrom lowestto highest,regardlessof the orderof occurrence.If multiplecodesare stored,alwaysbegindiagnosticwork with the lowest numberedcode Makea noteof the following: 1. WhenbatteryvoltageIS low, no detectionof failure is possible.Besureto checkthe batteryvoltageand otherconditionsbeforestartingthe test. 2. Diagnosticitemsare erasedif the batteryor the enginecontrollerconnectionis detached.Do not dis-

*The check engine/malfunction indicator lamp will come on when the terminal for the ignition timing adjustment is shorted to ground. Therefore, it is not abnormal that the light comes on even when the terminal for ignition timing is shorted at time of ignition timing adjustment. To testthe light, performthe following: 1. Turn the ignition switch ON. Inspectthe check engine/malfunctionindicatorlampfor Illumination. 2. The light shouldbe lit for 5 secondsand then shouldgo out. 3. If the lamp doesnot illuminate,checkfor open circuit In the harness,blownfuse or blown bulb.

connecteitherof thesecomponentsuntil the diagnostic materialpresentin the PCM hasbeenread completely. 3. Besureto attachand detachthe scantool to the datalink connectorwith the ignition key OFF. If the scantool in connectedor disconnectedwith the ignition key ON, diagnostictroublecodesmay be falselystoredandthe enginewarninglight may be illuminated.

) See Figures 85 and 86 The procedurelisted belowis to be usedonly as a guide,whenusing Mitsubishi’sMUT-II, or equivalent scantool. Forspecificoperatinginstructions,follow the directionssuppliedwith the particularscantool bemgused. 1. Removethe underdashcover, if equipped.Attach the scantool to the datalink connector,located on the left undersideof the instrumentpanel. 2. Usingthe scantool, readand recordthe onboarddiagnosticoutput. 3. Diagnoseand repairthe faulty componentsas required 4. Turnthe ignition switch OFF and thenturn it ON. 5. Erasethe diagnostictroublecode. 6 Recheckthe diaanostictroublecodeand make surethat the normal&de is output.

ata link connector

79232G37

89574g98

Fig. 83 Diagnosis terminal connector location-Galant

Fig. 85 The data link connector is located on the left under side of the instrumeni panel

SERVICEPRECAUTIONS l Beforeattachrngor detachingthe PCM harness connectors,makesurethe ignition switch is OFF and the negativebatterycableis disconnectedto avoid the possibility of damageto the PCM. l WhenperformingPCM input/outputsignal diagnosis,removethe pin terminalretainerfrom the connectorsto makeit easierto inserttesterprobes into the connector. l Whenattachingor detachingpin connectors , from the PCM,takecarenot to bendor breakany pin terminals.Checkthat thereare no bendsor breakson PCM pin terminalsbeforeattemptingany connections. l Beforereplacingany PCM, performthe PCM input/outputsignal diagnosisto makesurethe PCM is functioningproperly.

,--MU

DL4GNDSl.S

89574994

Fig. 86 Proper connection of the scan tool to read codes on OBD-I vehicles LGRDIJND 79232638

Fig. 84 Diagnostic connector Iocation-Mi‘age

DRIVEABILITYAND EMISSIONS CONTROLS4-27 WITHOUTASCANTOOL

1. Removethe underdashcover, if equipped. 2. Attachan analoavoltmeterbetweenthe onboarddiagnosticoutpit terminalof the datalink connectorand the groundterminal 3. Turn the ignition switch ON. 4. Readthe on-boarddiagnosticoutputpattern from the voltmeterand record. 5. Diagnoseand repairthe faultycomponentsas required. 6. Erasethe troublecode. 7. Turn the ignition swatchON, and readthe diagnostictroublecodes,checkingthat a normalcode is output.

8 See Figure 87.

*To erase diagnostictrouble codeswith a scantool, follow the directionsgiven by the tools manufacturer. 1. Turn the ignition switch OFF. OBD OUTPUT [TERMINAL

tic (OBO)output and groundterminal locations on the data link connector

The PowertrainControlModule(PCM) is given responsibrlityfor the operationof the emissioncontrol devices,cooling fans, ignition and advanceand in somecases,automatictransaxlefunctions.Becausethe PCM overseesboththe ignition timing and the fuel injectionoperation,a preciseair/fuel ratio will be maintainedunderall operatingconditions, The PCM is a microprocessor,or small computer, which receiveselectricalinputsfrom severalsensors, switchesand relayson and aroundthe engine. Basedon combinationsof theseinputs,the PCM controlsoutputsto various devicesconcernedwith engineoperationand emissions.Thecontrol module relies on the signalsto form a correctpictureof current vehicleoperation.If any of the input signalsis incorrect,the PCM reactsto whateverpictureis paintedfor it. For example,if the coolanttemperature sensoris inaccurateand readstoo low,the PCM may seea pictureof the engineneverwarmingup. Consequently,the enginesettingswill be maintainedas if the enginewere cold. Becauseso manyinputscan affectone output,correctdiagnosticproceduresare essentialon thesesystems, Onepart of the PCM is devotedto monitoring both input and outputfunctionswithin the system. This ability forms the core of the self-diagnosticsystem. If a problemis detectedwithin a circuit, the control modulewill recognizethe fault,assign it a DiagnosticTroubleCode(DTC),and storethe code in memory.Thestoredcode(s)maybe retrievedduring diagnosis.

2. Disconnectthe negativebatterycablefrom the batteryfor 1 minuteor more,then reattachit. 3. Turn ON the ignition switch and readthe diagnostictroublecodescheckingthat a normalcode is output.

Code21 EngineCoolantTemperatureSensor Code22 Crankanglesensor Code23 No. 1 cylinderTDC (camshaftposition) Sensor

Code24 Vehiclespeedsensor Code25 Barometricpressuresensor Code31 Knocksensor(KS) Code32 Manifold pressuresensor Code36 Ignitiontimmg adjustmentsignal Code39 Oxygensensor(rear- turbocharged) Code41 Injector Code42 Fuelpump Code43 EGR-California Code44 Ignition Coil; powertransistorunit (No. 1 and No. 4 cvlinders)on 3.OL Code62 ignition Coil; powertransistorunit (No. 2 and No. 5 cvlinders)on 3.OL Code53 ignition Coil; powertransistorunit (No. 3 and No. 6 cylinders)on 3.OL Code55 AC valve positionsensor Code59 Heatedoxygensensor Code61 Transaxlecontrol unit cable(automatic transmission) Code62 Warm-upcontrolvalve positionsensor (non-turbo)

Code11 Oxygensensor Code12 Air flow sensor Code13 IntakeAir TemperatureSensor Code14 ThrottlePositionSensor(TPS) Code15 SC Motor PositionSensor(MPS)

While the OBD-IIsystemis capableof recognizing manyinternalfaults,certainfaultsWIIInot be recognized.Becausethe control moduleseesonly electrical signals,it cannotsenseor reactto mechanicalor vacuumfaultsaffectingengineoperation.Someof thesefaults mayaffectanothercomponentwhich will set a code.For example,the PCM monitorsthe output signalto the fuel injectors,but cannotdetecta partiallycloggedinjector.As long as the outputdriver respondscorrectly,the computerwill readthe systemas functioningcorrectly.However,the improperflow of fuel may result in a leanmixture.This would, in turn, be detectedby the oxygensensorand noticedas a constantlyleansignal by the PCM. Once the signalfalls outsidethe pre-programmedlimits, the control modulewould noticethe fault and seta trouble code. Additionally,the OBD-IIsystememploysadaptive fuel logic. This processis usedto compensatefor normalwearand variabilitywithin the fuel system. Oncethe engineenterssteady-stateoperation,the control modulewatchesthe oxygensensorsignalfor a biasor tendencyto run slightly rich or lean.If such a bias is detected,the adaptivelogic correctsthe fuel deliveryto bring the air/fuel mixturetowardsa centeredor 14.7:1 ratio.This compensatingshift is storedIn a non-volatilememorywhich is retainedby batterypowerevenwith the ignition switchedOFF. The correctionfactor is thenavailablethe nexttime the vehicle is operated.

WITHASCANTOOL 8 See Figures 88, 89, 90, and 91 The DiagnosticLink Connector(DLC),underthe left-handside of the instrumentpanel,must be locatedto retrieveany OTC’s Readingthe control modulememoryis on of the first stepsin OBDII systemdiagnostics.This step should be initially performedto determinethe general natureof the fault.Subsequentreadingswill determine if the fault hasbeencleared. Readingcodescan be performedby any of the methodsbelow: l Readthe control modulememorywith the GenericScanTool (GST) l Readthe control modulememorywith the vehicle manufacturersspecifictester To readthe fault codes,connectthe scantool or testeraccordingto the manufacturersinstructions. Followthe manufacturersspecifiedprocedurefor readingthe codes.

WITHOUTASCANTOOL 8 See Figure 92 The DiagnosticLink Connector(DLC),underthe left-handside of the instrumentpanel,must be locatedto retrieveany DTC’s.

4-28 DRIVEABILITYAND EMISSIONS CONTROLS

Fig. 88 Plug the scan tool into the DLCunder the driver’s side of the instrumentpanel

Fig. 89 Follow the directions on the scan tool screen to retrieve the DTC’s -

3. LocatetheDiagnostic LinkConnector (DLC), whichis usuallyundertheleft-hand sideof theinstrument panel. 4. Starttheengineanddrivethevehicleuntilthe transaxle goesintothefailsafemode. 5. Parkthevehicle,butdonotturntheignition OFF.Allowit to idle. 6. Attacha voltmeter (analogor digital)to thetest terminals ontheDiagnostic LinkConnector (DLC). Thenegative leadshouldbeattached to terminal4 andthepositiveleadtoterminal1. 7. Observe thevoltmeter andcounttheflashes (orarmsweepsif usingananalogvoltmeter); note theapplicable codes. 8. Afterall of theDTC(s)havebeenretrieved, fix theapplicable problems, clearthecodes,drivethe vehicle,andperformtheretrievalprocedure againto ensurethatall of thecodesaregone.

WITHASCANTOOL

Fig. 90 in this case, we would choorse l-A ’ I Trouble Codesto retrieve the DTC’s

-;

Vehicle speed es446e35

Fig. 92 For OBOii coderetrieval without using a scan tool on Mitsubishi models, connect the DVOMand jumper wire as shown In 1996,all Mitsubishiswitched fromanarbitrary codelistingandformat,to thefederallyregulated On BoardDiagnostics 2ndGeneration (OBDII)codesystern.Normally,OBDII equipped vehiclesdonothave theoptionof allowingthepersonservicingthevehicletoflashthecodesoutwitha voltmeter; usuallya scantoolis necessary to retrieveOBDII codes.Mitsubishi,however, doesprovidethisoption,

I

ma*-. .. * . ng. vi me rtim In mts venicie contains no DTC’S -.- A

TheFederal government decided thatit wastime to createa standard for vehiclediagnostic systems codesfor easeof servicingandto insurethatcertain of thevehicle’ssystems werebeingmonitored for emissions purposes. SinceOBDII codesarestandardized (theyall containoneletterandfournumbers),theyareeasyto decipher. TheOBDII systemintheMitsubishimodelsis designedsothatit will flashtheDTC’soutona voltmeter(eventhougha scantoolis better).However, thefirsttwocharacters of thecodearenotused.This is because thetransaxle is a partof thepowertrain, so alltransaxle relatedcodeswill beginwitha P.Also, sincetherearenooverlapping numbers between SAE andMitsubishi codes,theseconddigitis alsonot necessary. Thesystemflashesthecodesout ma seriesof flashesinthree-- nmm J.-lr-, mh ---.. nrnlll ~.-- p corresponding to oneof thethreelastdiaitsof theOBDII code.Therefore,CodeWJJ wuuwUC: IIKWAJ WI III XVWI flashes,followedbyfiveflashes,thenbythree flashes.Eachgroupof flashesis serparated bya brief pause. All of theflashesareof the(;ameduration, witi the or$,88, nvrontinn hoinn mm “rw”I.‘L’“‘Iuv,,,yLUI”.Zerois representedbyz1longflash.Therefore, sevenflashes,one longflash,twoflasheswouldindicatea PO702 code nnmn^r ,.:*....:I\ (shortedTt3SWIWI LIIW. . Toretrievethecodes,performthefollowing: 1. Performthepreliminary inspection, located earlierinthissection.Thisisveryimportant, sincea looseor disconnected wire,orcorrodedconnector terminals cancauseawholeslewof unrelated DTC’s to bestoredbythecomputer; youwill wastea lotof timeperforming a diagnostic “goosechase.” 2. Grabsomepaperanda pencilor pentowrite downtheDTC’swhentheyareflashedout.

Controlmoduleresetprocedures area veryimportantpartof OBDII Systemdiaqnostics. Thisstepshouldbedoneattheendof anyfault coderepairandattheendof anydriveabilityrepair. Clearingcodescanbeperformed by . any . ofthe methods below: l Clearthecontrolmodulememory withthe Generic ScanTool(GST) l Clearthecontrolmodulememory withthevemere L’-‘mmariufacturer’s specifictester *The MILwill mayalso be de-activatedfor somecodesif the vehicle completesthree consecutivetrips without a fault detected with vehicle conditionssimilar to those present duringthe fault. WITHOUTASCANTOOL If therearestillcodespresent,eitherthecodes werenotproperlyclearedf:Arethecodesidenticalto thoseflashedoutprevious I$‘),or theunderlying problemis stillthere(AreIonlysomeof thecodesthe sameasoreviouslv?). I r

SCANTOOLCODES . YYY”

I ‘I” I cuI”I”.J

LbPO100MassorVolumeAir FlowCircuitMalfuncnon PO101MassorVolumeAir FlowCircuit Range/Performance Problem PO102MassorVolumeAirFlowCircuitLowInPut PO103MassorVolumeAirFlowCircuitHighInPut PO104Massor VolumeAirFlowCircuitIntermittent PO105ManifoldAbsolutePressure/Barometric Pressure CircuitMalfunction PO106ManifoldAbsolutePressure/Barometric Pressure CircuitRange/Performance Problem PO107ManifoldAbsolutePressure/Barometric Pressure CircuitLowInput

i

DRIVEABILITYAND EMISSIONS CONTROLS4-29 PO108 ManifoldAbsolutePressure/Barometric PressureCircuit High Input PO109 ManifoldAbsolutePressure/Barometric PressureCircuit Intermittent PO110 intakeAir TemperatureCircuit Malfunction PO111 IntakeAir TemperatureCircuit Range/PerformanceProblem PO112 IntakeAir TemperatureCircuit Low Input PO113 IntakeAir TemoeratureCircuit Hiah lnout PO114 IntakeAir TemberatureCircuit lnt&miitent PO115 EngineCoolantTemperatureCircuit Malfunction PO116 EngineCoolantTemperatureCircuit Range/Performance Problem PO117 EngineCoolantTemperatureCircuit Low Input PO118 EngineCoolantTemperatureCircuit High Input PO119 EngineCoolantTemperatureCircuit Intermittent PO120 ThrottlePosition Sensor/Switch“A” Circuit Malfunction PO121 ThrottlePositionSensor/Switch“A” Circuit Range/Performance Problem PO122 ThrottlePositionSensor/Switch“A” Circuit Low Input PO123 ThrottlePositionSensor/Switch“A” Circuit High Input PO124 ThrottlePositionSensor/Switch“A” Circuit Intermittent PO125 InsufficientCoolantTemperatureFor ClosedLoop FuelControl PO126 InsufficientCoolantTemperatureFor Stable Operation PO130 02 Circuit Malfunction(Bankno. 1 Sensor no. 1) PO131 02 SensorCircuit Low Voltage(Bankno. 1 Sensorno. 1) PO132 02 SensorCircuit High Voltage(Bankno. 1 Sensorno. 1) PO133 02 SensorCircuit Slow Response(Bank no. 1 Sensorno. 1) PO134 02 SensorCircuit No Activity Detected (Bankno. 1 Sensorno. 1) PO135 02 SensorHeaterCircuit Malfunction (Bankno. 1 Sensorno. 1) PO136 02 SensorCircuit Malfunction(Bankno. 1 Sensorno. 2) PO137 02 SensorCircuit Low Voltage(Bankno. 1 Sensorno. 2) PO138 02 SensorCircuit High Voltage(Bankno. 1 Sensorno. 2) PO139 02 SensorCircuit Slow Response(Bank no. 1 Sensorno. 2) PO140 02 SensorCircuit No Activity Detected (Bankno. 1 Sensorno. 2) PO141 02 SensorHeaterCircuit Malfunction (Bankno. 1 Sensorno. 2) PO142 02 SensorCircuit Malfunction(Bankno. 1 Sensorno. 3) PO143 02 SensorCircuit Low Voltage(Bankno. 1 Sensorno. 3) PO144 02 SensorCircuit High Voltage(Bankno. 1 Sensorno. 3) PO145 02 SensorCircuit Slow Response(Bank no. 1 Sensorno. 3) PO146 02 SensorCircuit No Activity Detected (Bankno. 1 Sensorno. 3) PO147 02 SensorHeaterCircuit Malfunction (Bankno. 1 Sensorno. 3) PO150 02 SensorCircuit Malfunction(Bankno. 2 Sensorno. 1)

PO151 02 SensorCircuit Low Voltage(Bankno. 2 Sensorno. 1) PO152 02 SensorCircuit High Voltage(Bankno. 2 Sensorno. 1) PO153 02 SensorCircuit Slow Response(Bank no. 2 Sensorno. 1) PO154 02 SensorCircuit No Activity Detected (Bankno. 2 Sensorno. 1) PO155 02 SensorHeaterCircuit Malfunction (Bankno. 2 Sensorno. 1) PO156 02 SensorCircuit Malfunction(Bankno. 2 Sensorno. 2) PO157 02 SensorCircuit Low Voltage(Bankno. 2 Sensorno. 2) PO158 02 SensorCircuit High Voltage(Bankno. 2 Sensorno. 2) PO159 02 SensorCircuit Slow Response(Bank no. 2 Sensorno. 2) PO160 02 SensorCircuit No Activity Detected (Bankno. 2 Sensorno. 2) PO161 02 SensorHeaterCircuit Malfunction (Bankno. 2 Sensorno. 2) PO162 02 Sensor CircuitMalfunction(8ank no.2 Sensorno.3) PO16302 Sensor Circuit Low Voltage (Bankno. Sensorno.3) PO16402 Sensor Circuit HighVoltage (Bankno. Sensorno.3) PO16502 Sensor Circuit Slow Response (Bankno. Sensorno.3) PO166 02 Sensor Circuit No Activity Detected(Bankno.2 Sensorno.3) PO16702 SensorHeaterCircuitMalfunction(Bank no.2 Sensorno.3) PO170 FuelTrim Malfunction(Bankno. 1 ) PO171 SystemToo Lean(Bankno. 1 ) PO172 SvstemToo Rich(Bankno 1 ) PO173 F;el Trim Malfundtion(Bankio. 2 ) PO174 SystemToo Lean(Bankno 2 ) PO175 SystemToo Rich(Bankno. 2 ) PO176 FuelCompositionSensorCircuit Malfunction PO177 FuelCompositionSensorCircuit Range/Performance PO178 FuelCompositionSensorCircuit Low Input PO179 FuelCompositionSensorCircuit High Input PO180 FuelTemperatureSensor“A” Circuit Malfunction PO181 FuelTemperatureSensor“A” Circuit Range/Performance PO182 FuelTemperatureSensor“A” Circuit Low Input PO183 FuelTemperatureSensor“A” Circuit High Input PO184 FuelTemperatureSensor“A” Circuit Intermittent PO185 FuelTemperatureSensor“B” Circuit Malfunction PO186 FuelTemperatureSensor“B” Circuit Range/Performance PO187 FuelTemperatureSensor“B” Circuit Low Input PO188 FuelTemperatureSensor“B” Circuit High Input PO189 FuelTemperatureSensor“B” Circuit Intermittent PO190 FuelRail PressureSensorCircuit Malfunchon PO191 FuelRail PressureSensorCircuit Range/Performance

PO192 FuelRail PressureSensorCircuit Low Input PO193 FuelRail PressureSensorCircuit High Input PO194 FuelRail PressureSensorCircuit Intermittent PO195 EngineOil TempetatureSensorMalfunction PO198 EngineOil TemperatureSensor Range/Performance PO197 EngineOil TemperatureSensorLow PO198 EngineOil TemperatureSensorHigh W199 EngineOil TemperatureSensorIntermittent PO200 InjectorCircuit Malfunction PO201 InjectorCircuit Malfunction-Cylinder no. 1 PO202 InjectorCircuit Malfunction-Cylinder no. 2 PO203 InjectorCircuit Malfunction-Cylinder no. 3 PO204 InjectorCircuit Malfunction-Cylinder no. 4 PO205 InjectorCircuit Malfunction-Cylinder no. 5 PO206 InjectorCircuit Malfunction-Cylinder no. 6 PO214 Cold StartInjectorno. 2 Malfunction PO215 EngineShutoffSolenoidMalfunction PO218 InjectionTiming ControlCircuit Malfunction PO217 EngineOverTemperatureCondition PO218 TransmissionOverTemperatureCondition PO219 EngineOverSpeedCondition PO220 ThrottlePositionSensor/Switch‘9” Circuit Malfunction PO221 ThrottlePositionSensor/Switch“B” Circuit Range/Performance Problem PO222 ThrottlePositionSensor/Switch“B” Circuit Low Input PO223 ThrottlePositionSensor/Switch“B” Circuit High Input PO224 ThrottlePositionSensor/Switch“B” Circuit Intermittent PO225 ThrottlePositionSensor/Switch“C” Circuit Malfunction PO226 ThrottlePosition Sensor/Switch“C” Circuit Range/Performance Problem PO227 ThrottlePositionSensor/Switch“c” Circuit Low Input PO228 ThrottlePosition Sensor/Switch“C” Circuit High Input PO229 ThrottlePositionSensor/Switch“C” Circuit Intermittent PO230 FuelPump PrimaryCircuit Malfunction PO231 Fuel PumpSecondaryCircuit Low PO232 FuelPumpSecondaryCircuit High PO233 FuelPumpSecondaryCircuit Intermittent PO261 Cylinderno. 1 InjectorCircuit Low PO262 Cylinderno. 1 InjectorCircuit High PO263 Cylinderno. 1 Contribution/BalanceFault PO264 Cvlinderno. 2 lniectorCircuit Low PO265 Cylinderno. 2 InjectorCircuit High PO266 Cylinderno. 2 Contribution/BalanceFault PO267 Cylinderno. 3 InjectorCircuit Low PO268 Cylinderno. 3 InjectorCircuit High PO269 Cylinderno. 3 Contribution/BalanceFault PO270 Cylinderno. 4 InjectorCircuit Low PO271 Cvlinderno. 4 lniectorCircuit Hiah PO272 Cylinderno. 4 CbntributionlBalaiceFault PO273 Cylinderno. 5 InjectorCircuit Low PO274 Cylinderno. 5 InjectorCircuit High

.

4-30 DRIVEABILITYAND EMISSIONS CONTROLS PO275 Cvlinderno. 5 Contribution/BalanceFault PO276 Cylinderno. 6 InjectorCircuit Low PO277 Cylinderno. 6 lniectorCircuit High PO278 Cylinderno. 6 Contribution/BalanceFault PO300 Random/MultipleCylinderMisfire Detected PO301 Cylinderno. l-Misfire Detected PO302 Cvlinderno 2-Misfire Detected PO303 Cylinderno. 3-Misfire Detected PO304 Cylinderno. 4-Misfire Detected PO305 Cylinderno. +-Misfire Detected PO306 Cylinderno. &-Misfire Detected PO320 Ignition/DistributorEngineSpeedInput Circuit Malfunction PO321 Ignition/DistributorEngineSpeedInput Circuit Range/Performance PO322 Ignibon/DistributorEngineSpeedInput Circuit No Signal PO323 Ignition/DistributorEngineSpeedInput Circuit Intermittent PO325 KnockSensorno. l-Circuit Malfunction (Bankno. 1 or Single Sensor) PO326 KnockSensorno. l-Circuit Range/Performance(Bankno. 1 or SrngleSensor) PO327 KnockSensorno. l-Circuit Low Input (Bankno. 1 or SingleSensor) PO328 KnockSensorno. l-Circuit High Input (Bankno. 1 or SingleSensor) PO329 KnockSensorno. l-Circuit Input Intermittent(Bankno. 1 or SmgleSensor) PO330 KnockSensorno. 2-Circuit Malfunction (Bankno. 2 ) PO331 KnockSensorno. 2-Circuit Range/Performance(Bankno. 2 ) PO332 KnockSensorno. 2-Circuit Low Input (Bankno. 2 ) PO333 KnockSensorno. 2-Circuit High Input (Bankno. 2 ) PO334 KnockSensorno. 2-Circuit Input Intermittent(Bankno. 2) PO335 CrankshaftPositionSensor“A” Circuit Malfunction PO336 CrankshaftPosition Sensor“A” Circuit Range/Performance PO337 CrankshaftPositionSensor“A” Circuit Low Input PO338 CrankshaftPositionSensor“A” Circuit High Input PO339 CrankshaftPosition Sensor“A” Circuit Intermittent PO340 CamshaftPosition SensorCircuit Malfunction PO341 CamshaftPosition SensorCircuit Range/Performance PO342 CamshaftPositionSensorCircuit Low Input PO343 CamshaftPosition SensorCircuit High Input PO344 CamshaftPosition SensorCircuit Intermittent PO350 Ignition Coil Primary/SecondaryCircuit Malfunction PO351 Ignition Coil “A” Primary/SecondaryCircuit Malfunction PO352 IgnitionCoil “B” Primary/SecondaryCircuit Malfunction PO353 IgnitionCoil “C” Primary/SecondaryCircuit Malfunction PO354 IgnitionCoil “D” Primary/SecondaryCircuit Malfunction PO355 Ignition Coil “E” Primary/SecondaryCircuit Malfunction

PO356 Ignition Coil “F” Primary/SecondaryCircuit Malfunction PO357 Ignition Coil “G” Primary/SecondaryCircuit Malfunction PO358 IgnitionCoil ‘Y-l”Primary/SecondaryCircuit Malfunctron PO359 IgnitionCoil “I” Primary/SecondaryCircuit Malfunction PO360 Ignition Coil “J” Primary/SecondaryCircuit Malfunction PO361 IgnitionCoil “K” Primary/SecondaryCircuit Malfunction PO362 IgnitionCoil “L” Primary/SecondaryCircuit Malfunction PO370 Timing ReferenceHigh ResolutionSignal “A” Malfunction PO371 Timing ReferenceHigh ResolutionSignal “A” Too Many Pulses PO372 Timing ReferenceHigh ResolutionSignal “A” Too FewPulses PO373 Timing ReferenceHigh ResolutionSignal “A” Intermittent/ErraticPulses PO374 Timing ReferenceHigh ResolutionSignal “A” No Pulses PO375 Timing ReferenceHigh ResolutionSignal “B” Malfunction PO376 Timing ReferenceHigh ResolutionSignal “B” Too Many Pulses PO377 Timing ReferenceHigh ResolutionSignal 9” Too FewPulses PO378 Timing ReferenceHigh ResolutionSignal “B” Intermittent/ErraticPulses PO379 Timing ReferenceHigh ResolutionSignal “B” No Pulses PO385 CrankshaftPosition Sensor9” Circuit Malfunction PO386 CrankshaftPositionSensor“B” Circuit Range/Performance PO387 CrankshaftPositionSensor‘9” Circuit Low Input PO388 CrankshaftPositionSensor“B” Circuit High Input PO389 CrankshaftPosition Sensor“B” Circuit Intermittent PO400 ExhaustGasRecirculationFlowMalfunction PO401 ExhaustGasRecirculationFlow Insufficient Detected PO402 ExhaustGasRecirculationFlow Excessive Detected PO403 ExhaustGasRecirculationCircuit Malfunction PO404 ExhaustGasRecirculationCircuit Range/Performance PO405 ExhaustGasRecirculationSensor“A” Circuit Low PO406 ExhaustGasRecirculationSensor“A” Circuit High PO407 ExhaustGasRecirculationSensor“B” Circuit Low PO408 ExhaustGasRecirculationSensor“B” Circuit High PO410 SecondaryAir InjectionSystemMalfunction PO411 SecondaryAir InjectionSystemIncorrect Flow Detected PO412 SecondaryAir InjectionSystemSwitching Valve “A” Circuit Malfunction PO413 SecondaryAir InjectionSystemSwitching Valve “A” Circuit Open PO414 SecondaryAir InjectionSystemSwitching Valve “A” Circuit Shorted

PO415 SecondaryAir InjectionSystemSwitching Valve “B” Circuit Malfunction PO416 SecondaryAir InjectionSystemSwitching Valve “B” Circuit Open PO417 SecondaryAir InjectionSystemSwitching Valve “B” Circuit Shorted PO418 SecondaryAir InjectionSystemRelay“A Circuit Malfunction PO419 SecondaryAir InjectionSystemRelay“B” Circuit Malfunction PO420 CatalystSystemEfficiencyBelowThreshold (Bankno. 1 ) PO421 WarmUp CatalystEfficiencyBelow Threshold(Bankno. 1 ) PO422 Main CatalystEfficiencyBelowThreshold (Bankno. 1 ) PO423 HeatedCatalystEfficiencyBelowThreshold (Bankno. 1 ) PO424 HeatedCatalystTemperatureBelow Threshold(Bankno. 1) PO430 CatalystSystemEfficiencyBelowThreshold (Bankno. 2 ) PO431 WarmUp CatalystEfficiencyBelow Threshold(Bankno. 2 ) PO432 Main CatalystEfficiencyBelowThreshold (Bankno. 2) PO433 HeatedCatalystEfficiencyBelowThreshold (Bankno. 2 ) PO434 HeatedCatalvstTemoeratureBelow ’ Threshold(Bankno. 2 j PO440 EvaporativeEmissionControlSystem Malfunction PO441 EvaporativeEmissionControlSystemIncorrectPurgeFlow PO442 EvaporativeEmissionControlSystem LeakDetected(Small Leak) PO443 EvaporativeEmissionControlSystem PurgeControlValve Circuit Malfunction PO444 EvaporativeEmissionControlSystem PurgeControlValve Circuit Open PO445 EvaporativeEmissionControlSystem PurgeControlValve Circuit Shorted PO446 EvaporativeEmissionControlSystem Vent ControlCircuit Malfunction PO447 EvaporativeEmissionControlSystem Vent ControlCircuit Open PO448 EvaporativeEmissionControlSystem Vent ControlCircuit Shorted PO449 EvaporativeEmissionControlSystem VentValve/SolenoidCircuit Malfunction PO450 EvaporativeEmissionControlSystem PressureSensorMalfunction PO451 EvaporativeEmissionControlSystem PressureSensorRange/Performance PO452 EvaporativeEmissionControlSystem PressureSensorLow Input PO453 EvaporativeEmissionControlSystem PressureSensorHigh Input PO454 EvaporativeEmissionControlSystem PressureSensorIntermittent PO455 EvaporativeEmissionControlSystem LeakDetected(GrossLeak) PO460 FuelLevelSensorCircuit Malfunction PO461 Fuel LevelSensorCircuit Range/Performance PO462 FuelLevelSensorCircuit Low Input PO463 Fuel LevelSensorCircuit High Input PO464 FuelLevelSensorCircuit Intermittent PO465 PurgeFlowSensorCircuit Malfunction PO466 PurgeFlowSensorCircuit Range/Performance PO467 PurgeFlowSensorCircuit Low Input

DRIVEABILITYAND EMISSIONSCONTROL-S 4-31 PO466 PurgeFlowSensorCircuit High Input PO469 PurqeFlowSensorCircuit Intermittent PO470 ExhaustPressureSensorMalfunction PO471 ExhaustPressureSensorRange/Performance PO472 ExhaustPressureSensorLow PO473 ExhaustPressureSensorHiah PO474 ExhaustPressureSensorlnirmittent PO475 ExhaustPressureControlValveMalfunction PO476 ExhaustPressureControlValve Range/Performance PO477 ExhaustPressureControlValve Low PO476 ExhaustPressureControlValveHigh PO479 ExhaustPressureControlValve Intermittent PO460 Cooling Fanno 1 ControlCircuit Malfunction PO461 Cooling Fanno. 2 Control Circuit Malfunction PO462 CoolingFanno. 3 ControlCircuit Malfunction PO463 Cooling FanRationalityCheckMalfunction PO464 CoolingFanCircuit OverCurrent PO465 Cooling FanPower/GroundCircuit Malfunction PO500 VehicleSpeedSensorMalfunction PO501 VehicleSpeedSensorRange/Performance PO502 VehicleSpeedSensorCircuit Low Input PO503 VehicleSpeedSensorIntermittent/Erratic/High PO505 Idle ControlSystemMalfunction PO506 Idle ControlSystemRPM LowerThanExpected PO507 Idle ControlSystemRPM HigherThanExpected PO510 ClosedThrottlePositionSwitchMalfunction PO520 EngineOil PressureSensor/SwitchCircuit Malfunction PO521 EngineOil PressureSensor/Switch Range/Performance PO522 EngineOil PressureSensor/SwitchLow Voltage PO523 EngineOil PressureSensor/SwitchHigh Voltage PO530 A/C RefrigerantPressureSensorCircuit Malfunction PO531 A/C RefrigerantPressureSensorCircuit Range/Performance PO532 A/C RefrigerantPressureSensorCircuit Low Input PO533 A/C RefrigerantPressureSensorCircuit High Input PO534 A/C RefrigerantChargeLoss PO550 PowerSteeringPressureSensorCircuit Malfunction PO551 PowerSteeringPressureSensorCircuit Range/Performance PO552 PowerSteeringPressureSensorCircuit Low Input PO553 PowerSteeringPressureSensorCircuit High Input PO554 PowerSteeringPressureSensorCirciit Intermittent PO560 SystemVoltageMalfunction PO561 SystemVoltageUnstable PO562 SystemVoltageLow PO563 SvstemVoltaoeHlah PO565 Ciuise ControlOn%ignalMalfunction PO566 Cruise ControlOff Signal Malfunction

PO567 CruiseControlResumeSignal Malfunction PO566 CruiseControlSetSignal Malfunction PO569 CruiseControlCoastSignal Malfunction PO570 CruiseControlAccelSignal Malfunction PO571 CruiseControl/BrakeSwitch “A” Circuit Malfunction PO572 CruiseControl/BrakeSwitch“A” Circuit Low PO573 CruiseControl/BrakeSwitch “A” Circuit High P0574Through PO560 Reservedfor Cruise Codes PO600 Serial CommunicationLink Malfunction PO601 InternalControlModule MemoryCheck Sum Error PO602 ControlModule ProgrammingError PO603 InternalControl ModuleKeepAlive Memory (KAM) Error PO604 InternalControl ModuleRandomAccess Memory (RAM) Error PO605 InternalControl ModuleReadOnlyMemory (ROM)Error PO606 PCM ProcessorFault PO606 ControlModuleVSS Output“A” Malfunction PO609 ControlModuleVSS Output“6” Malfunction PO620 GeneratorControlCircuit Malfunction PO621 GeneratorLamp “L” Control Circuit Malfunction PO622 GeneratorField “F” Control Circuit Malfunction PO650 MalfunctionIndicatorLamp(MIL) Control Circuit Malfunctron PO654 EngineRPM OutputCircuit Malfunction PO655 EngineHot LampOutputControlCircuit Malfunction PO656 FuelLevelOutputCircuit Malfunction PO700 TransmissionControlSystemMalfunction PO701 TransmissionControlSystemRange/Performance PO702 TransmissionControlSystemElectrical PO703 TorqueConverter/BrakeSwitch “B” Circuit Malfunction PO704 ClutchSwitch InputCircuit Malfunction PO705 TransmissionRangeSensorCircuit Malfunction (PRNDLInput) PO706 TransmissionRangeSensorCircuit Range/Performance PO707 TransmissionRangeSensorCircuit Low Input PO706 TransmissionRangeSensorCircuit High Input PO709 TransmissionRangeSensorCircuit Intermittent PO710TransmissionFluIdTemperatureSensor Circuit Malfunction PO711 TransmissionFluid TemperatureSensor Circuit Range/Performance PO712 TransmissionFluidTemperatureSensor Circuit Low Input PO713 TransmissionFluid TemperatureSensor Circuit High Input PO714 TransmissionFluidTemperatureSensor Circuit Intermittent PO715 Input/TurbineSpeedSensorCircuit Malfunction PO716 Input/TurbineSpeedSensorCircuit Range/Performance PO717 InpWurbine SpeedSensorCircuit No Signal

PO716 Inputflurbine SpeedSensorCircuit Intermittent PO719 TorqueConverter/BrakeSwitch“B” Circuit Low PO720 OutputSpeedSensorCircuit Malfunction PO721 OutputSpeedSensorCircuit Range/Performance PO722 OutputSpeedSensorCircuit No Signal PO723 OutputSpeedSensorCircuit Intermittent PO724 ToraueConverter/BrakeSwitch“B” Circuit High PO725 EngineSpeedInputCircuit Malfunction PO726 EngineSpeedInputCircuit Range/PerforPO727 EngineSpeedInputCircuit No Signal PO726 EngineSpeedInputCircuit Intermittent PO730 IncorrectGearRatio PO731 Gearno. 1 IncorrectRatio PO732 Gearno. 2 IncorrectRatio PO733 Gearno. 3 IncorrectRatio PO734 Gearno 4 IncorrectRatio PO735 Gearno. 5 IncorrectRatio PO736 ReverseIncorrectRatio PO740 TorqueConverterClutchCircuit Malfunction PO741 TorqueConverterClutchCircuit Performanceor StuckOff PO742 TorqueConverterClutchCircuit StuckOn PO743 TorqueConverterClutchCircuit Electrical PO744 TorqueConverterClutchCircuit Intermittent PO745 PressureControlSolenoidMalfunction PO746 PressureControlSolenoidPerformanceor StuckOff PO747 PressureControlSolenoidStuck On PO746 PressureControlSolenoidElectrical PO749 PressureControlSolenoidIntermittent PO750 Shift Solenoid“A” Malfunction PO751 Shift Solenoid“A” Performanceor Stuck Off PO752 Shift Solenoid“A” StuckOn PO753 Shift Solenoid“A” Electrical PO754 Shift Solenoid“A” Intermittent PO755 Shift Solenoid“8 Malfunction PO756 Shift Solenoid“B” Performanceor Stuck Oft PO757 Shift Solenoid“B” StuckOn PO756 Shift Solenoid“6” Electrical PO759 Shift Solenoid“8” Intermittent PO760 Shift Solenoid“C” Malfunction PO761 Shift Solenoid“C” PerformanceOr Stuck Oft PO762 Shift Solenoid“C” StuckOn PO763 Shift Solenoid“C” Electrical PO764 Shift Solenoid“C” Intermittent PO765 Shift Solenoid“D” Malfunction PO766 Shift Solenoid“D” PerformanceOr Stuck Oft PO767 Shift Solenoid“D” StuckOn PO766 Shift Solenoid“D” Electrical PO769 Shift Solenoid“D” Intermittent PO770 Shift Solenoid“E” Malfunction PO771 Shift Solenoid“E” PerformanceOr Stuck Off PO772 Shift Solenoid“E” StuckOn PO773 Shift Solenoid“E” Electrical PO774 Shift Solenoid“E” Intermittent PO760 Shift Malfunction PO761 l-2 Shift Malfunction PO762 2-3 Shift Malfunction PO763 3-4 Shift Malfunction PO764 4-5 Shift Malfunction

4-32 DRIVEABILITYAND EMISSIONS CONTROLS PO785 Shift/TimingSolenoidMalfunction PO786 Shift/TimingSolenoidRange/Performance PO787 Shift/TimingSolenoidLow PO788 Shift/TimingSolenordHigh PO789 Shift/TimingSolenoidIntermittent PO790 Normal/PerformanceSwitchCircuit Malfunction PO801 ReverseInhibit ControlCircuit Malfunction PO803 l-4 Upshift(Skip Shift) SolenoidControl Circuit Malfunction PO804 l-4 Upshift(Skip Shift) LampControl Circuit Malfunction PllOO InductionControlMotor PositionSensor Fault PI101 TractionControlVacuumSolenoidCircuit Fault Pl102 TractionControlVentilationSolenoidCircuit Fault PI105 FuelPressureSolenoidCircuit Fault

P1294 TargetIdle SpeedNot Reached P1295 No 5-Volt SupplyTo TP Sensor P1296 No 5-Volt SupplyTo MAP Sensor P1297 No ChangeIn MAP FromStartTo Run PI300 IgnitionTiming AdjustmentCircuit Pl390 Timing Belt SkippedOneTooth Or More Pl391 IntermittentLoss Of CMP Or CKPSensor Signals Pl400 ManifoldDifferentialPressureSensor Fault P1443 EVAPPurgeControlSolenoid“2” Circuit Fault P1486 EVAPLeakMonitor PinchedHoseDetected P1487 High SpeedRadiatorFanControlRelay Circuit Fault Pl490 Low SpeedFanControlRelayFault P1492 BatteryTemperatureSensorHigh Voltage P1494 EVAPVentilationSwitchOr Mechanical Fault

Output pattern (for voltmeter)

Code

P1495 EVAPVentilationSolenoidCircurtFault P1496 5-Volt SupplyOutputToo Low Pl500 GeneratorFRTerminalCircuit Fault Pl600 PCM-TCM SerialCommunicationLink Circuit Fault P1696 PCM Failure-EEPROMWrite Denied Pl715 No CCD MessagesFromTCM Pl750 TCM PulseGeneratorCircuit Fault Pl791 PressureControl,Shift Control,TCC Solenoid Fault P1899 PCM ECTLevelSignalto TCM Circuit Fault P1989High SpeedCondenserFanControlRelay Fault

FLASHOUTCODELIST # See Figures93, 94, 95, and 96

Cause

P1702 MATOOSE

Pl701

Remedy

Shorted throttle position sensor cil cuit

o o

Open throttle position sensor circuii

o

A!iATW5F

p1704

Throttle position sensor malfunction Improperly adjusted throttle posiASATmH tion sensor

-

PO712

Open fluid temperature sensor cir1 cuit

u

o

o o

ASAT

PO713

o

Shorted fluid temperature circuit

sensor

o

Check the throttle position sensor connector check the throttle position sensor itself Check the closed throttle position switch Check the throttle position sensor wiring harness Check the wiring between ECM and throttle position sensor Fluid temperature sensor connector inspection Fluid temperature sensor inspection Fluid temperature sensor wiring harness inspection

ASATOOU

Open kickdown servo switch circuit I Shorted kickdown servo switch circuit

Pl709 I A5ATOOSK

Fig. 93 Mitsubishi flash out DTC's, 1 of 4-Type

4 (DBD II) Codes

o o o

Check the kickdown servo switch connector Check the kickdown servo switch Checkthe kickdown servo switch wiring harness

DRIVEABILITYAND EMISSIONS CONTROLS4-33 Output pattern (for voltmeter)

Code

Cause

Remedy o

Open ignition pulse pickup cable circuit

PO727 A5ATW51

o

P1714

Short-circuited or improperly adjusted closed throttle position switch

o

ASATOOSM

o o o

o

Open-circuited pulse generator A

PO717

o

ASATOOSN

Open-circuited pulse generator B

PO722

o

A5ATOO50

PO707

m

o o

No input signal A5ATOO.52

o

Check the ignition pulse signal line Checkthe wiring between ECM and ignisiton system Check the tion switch Check the tion switch Adjust the tion switch Check the tion switch

closed throttle posiconnector closed throttle posiitself closed throttle posiclosed throttle posiwiring harness

Check the pulse generator A and pulse generator 6 Check the vehicle speed reed switch (for chattering) CheckthepulsegeneratorA and B wiring harness Checkthe transaxle range switch Check the transaxle range wiring harness Check the manual control cable

PO708 I

Open shift control solenoid vave A circuit

o

Shorted shift control solenoid valve

o

PO757

Open shift control solenoid valve B

o

PO758

Short shift control solenoid valve B circuit

PO752 ASATOOSP

PO753

o

ASATOO5Q

o o

A5ATOOSS

Open pressure control solenoid valve circuit

PO747

o o

PO748 ASATOOSJ

Check the solenoid valve connector Check the shift control solenoid valve A Check the shift control solenoid valve A wiring harness Check the shift control solenoid valve connector Check the shift control solenoid valve B wiring harness Check the shift control solenoid valve B Check the pressure control solenoid valve Check the pressure control solenoid valve wiring harness

I 89446928

i9. 94 Mitsubishi flash out DTC’s,2 of 4-Type 4 (DBDII) Codes

.

4-34 DRIVEABILITYAND EMISSIONS CONTROLS

Open circuit in damper clutch control solenoid valve Short circuit in damper clutch control solenoid valve Defect in the damper clutch sys-

o o o o o

Shifting to first gear does not match the engine speed o Shifting to second gear does not match the engine speed

PO732

o o o

ASATAOSC

Shifting to third gear does not match the engine speed

PO733

o o o o o

A5ATA05D

PO734

o

Shifting to fourth geardoes not match the engine speed

o o o o o

ASATA05E

J

Inspection of solenoid valve connector Individual inspection of damper clutch control solenoid valve Check the damper clutch control solenoid valve wiring harness Chck the TCM Inspection of damper clutch hydraulic system

heckthe pulse generator A and pulse generator B connector Check the pulse generator A and puls generator B Checkthe one way clutch or rear clutch Check the pulse generator wiring harness Kickdown brake slippage Check the rear clutch or control system Check the pulse generator A and pulse generator B connector Check the pulse generator A and pulse generator B Checkthe pulse generatorwiring harness Check the rear clutch slippage or control system Check the front clutch slippage or control system Check the pulse generator A and B connector Check the pulse generator A and B Kickdown brake slippage Check the end clutch or control system Check the pulse generator wiring harness

Normal 89446

:ig. 95 Mitsubishi flash out DTC’s,3 of 4-Type 4 (OBDII) Codes

.

DRIVEABILITYAND EMISSIONS CONTROLS4-35 FAIL-SAFE

ITEM Fail-safe

Note (relation to diagnostic 1trouble code) When code No.071 7 is generated fourth time

Locked in third (D) or second (2,L)

I Open-circuited generator B

A5ATOO5P 1

PO753

pulse

Locked in third (D) or When code No.0722 second (2,L) generated fourth time

Open-circuited or shorted shift control solenoid valve A

Lock in third

Open-circuited or shorted shift control solenoid valve B

Lock in third gear

When code No.0752 or 0753 is generated fourth time

m MAT0050

1

PO758

Locked in third (D) or When code No.0747 or 0748 is generated second (2,L) fourth time

PO731

Gear shifting does not match the engine speec A5ATAO58

PO732 A5ATAO5C

PO733 A5ATAOSD

PO734 A5ATAOSE

ig. 96 Mitsubishi flash out DTC’s,4 of 4-Type 4 (060 II) Codes

is

Locked in third (D) or When either code No.O731,0732,0733 or second (2,L) 0734 is generated fourth time

4-36 DRIVEABILITYAND EMISSIONS CONTROLS Followingare vacuummagramsfor most of the engineand emissionspackagecombinationscovered by this manual Becausevacuumcircuits will vary basedon various engineand vehicleoptions,always referfirst to the vehicleemissioncontrol Information label,if present.Shouldthe label be missing,or shouldvehiclebe equippedwith a differentengine from the vehicle’soriginal equipment,referto the diagramsbelowfor the sameor similar configuration. If you wish to obtaina replacementemissionslabel, most manufacturersmakethe labelsavailablefor lurchase.The labelscan usuallybe orderedfrom a ocal dealer.

93154vul

Emissioncontrol systemvacuumhose routing-1990-92 1.5L engine, California emissions

Emissioncontrol systemvacuumhose routing-1993 1.5L engine, Federal emissions

r

I

Emissioncontrol systemvacuumhose routing-1990-92 1.6L engine, Federal emissions

IEmissioncontrol systemvacuumhose

I‘outing-1993 1.6L engine, Federal 1Irmissions

93154vo8

A vacuumdiagram is typically affixed to a label in the engine compartment

Emissioncontrol systemvacuumhose routing-1990-92 1.6L engine, California emissions

Emissioncontrol systemvacuumhose routing-1994-96 1.5L engine. California and Federal emissions -

Emissioncontrol systemvacuumhose routing-1993 1.5L engine, California emissions

routing-1994-96 1.8L engine, Federal emissions;1994California emissions

93154voI

Emissioncontrol systemvacuumhose routing-1990-92 1.5L engine, Federal emissions

DRIVEABILITYAND EMISSIONS CONTROLi4-37

,i Ii hm

*ul-93154VlO

Emissioncontrol systemvacuumhose routing-1995-96 1.8L engine, California emissions

Emissioncontrol systemvacuumhose routing-1998 1.5L engine, California and Federalemissions

93154Vll

Emissioncontrol systemvacuumhose routing-1997 1.5L engine, California and Federalemissions

Emissioncontrol systemvacuumhose routing-1999-00 1.8L engine, California and Federal emissions

93154v17

Emissioncontrol systemvacuumhose routing-1998 1.8L engine, California and Federalemissions

Emissioncontrol systemvacuumhose routing-1990-93 2.OLSOHCengine, Federalemissions

93154v15

Emissioncontrol systemvacuumhose ‘outing-1997 1.8L engine, California and Federalemissions

Emissioncontrol systemvacuumhose fouting-1999-00 1.5L engine, California %ndFederal emissions

Emissioncontrol systemvacuumhose routing-1990-93 2.OLSOHCengine, California emissions

.

4-38 DRIVEABILITYAND EMISSIONS CONTROLS VEHICLE FRONT

.VE

FUEL PRESSURE REGULATOR

0: GREEN y: YELLOW L: LIGHT BLUE R: RED B: BLACK

PURGE ‘CONTROL SOLENOID VALVE

imissioncontrol systemvacuumhose routing-1990 2.OLDOHCnon-turboengine, Federal VEHICLE FRONT

EGF VALVE

EGR CONTROL SOLENOID VALVE FUEL PRESSURE REGULATOR STER

G: GREEN y: YELLOW L: UGHT BLUE R: RED B: BLACK

I PURGE CONTROL SOLENOID VALVE 89574vo4

imission control systemvacuumhose routing-1990 2.OLDOHCnon-turboengine, California

.

DRIVEABILITYAND EMISSIONS CONTROLS4-39 VEHICLEFRONT

FI

Emissioncontrol systemvacuumhose routing-1990 2.OLDOHCturbo engine, Federal I

VEHICLEFRONT STE GATEACTUATOR G: GREEN y: YELLOW L: LIGHT BLUE R: RED B: BLACK w: WHITE

LENOIDVALVE TURBOCHARGE

FUEL PRESSUREREGU

RGE CONTROLVALVE

FUEL PRESSURECO SOLENOIDVALVE

OLENOIDVALVE I

Emissioncontrol systemvacuumhose routing-1990 2.OLDOHCturbo engine, California

89574VO6

4-40 DRIVEABILITYAND EMISSIONS CONTROLS EVAPORATIVE EMISSION PURGE SOLENOID I

THROlTLE BODY

EVAPORATIVE CANISTER

FUEL PRESSURE - REGULATOR

THERMAL VACUUM VALVE $d

yEAt

G: GREEN y: YELLOW L: LIGHT BLUE R: RED 8: BLACK

VEHICLE FRONT

imission control systemvacuumhose routing-1991-93 2.OLDOHCnon-turboengine, Federal

EVAPORATIVE EMISSION CANISTER

\

EVAPORATIVE EMlSSlON PURGE SOLENOID \

\

THROllLE

80 FUEL PRESSURE REGULATOR

EGR SOLENOID

G: GREEN Y: YELLOW L: UGHT BLUE R: RED B: BLACK

. a

VEHlCLE FRONT

imission control systemvacuumhose routing-1991-93 2.OLDOHCnon-turboengine, California

Bs574VlO

.

DRIVEABILITYAND EMISSIONS CONTROLS4-41 EVAPORATIVE EMISSION PURGE FUEL PRESSURE SOLENOID

FUEL PRESSURE REGULATOR

AlRC

THERMAL VACUUM VALVE

TURBOCHARGER WASTE GATE SOLENOID

TURBOCHARGER

P TURBOCHARGER WASTE GATE ACTUATOR

a VEHlCLi

G: GREEN y: YELLOW L: UGHT BLUE R: RED B: BLACK w: WHlTE

FRONT 89574Vll

Imission control system vacuum hose routing-1991-93

2.OL DDHC turbo engine, Federal FUEL PRESSURE SOLENOID

EVAPORATlVE EMISSION CANISTER

EGR SOLENOID

PURGE CONTROL VALVE

ORATlVE EMISSION PURGE SOLENOID

FUEL PRESSURE REGULATOR

TURBOCHARGER

TURBOCHARGER WASTE GATE ACTUATOR

0: GREEN Y: YELLOW Lz UGHT BLUE R: RED 8: BLACK w: WHITE

VEHICLE FRCNT a9574vi;

Imission control system vacuum hose routing-1991-93

2.OL DOHC turbo engine. California

4-42 DRIVEABILITYAND EMISSIONS CONTROLS

93154v24

Emissioncontrol systemvacuumhose routing-1994-96 2.4L engine, Federal emissions

Emissioncontrol systemvacuumhose routing-1997 2.4L engine, California Iemissions I I

TVTbE

Emissioncontrol systemvacuumhose routing-1999-00 2.4L engine

93154~26 93154v25

Emissioncontrol systemvacuumhose routing-1994-96 2.4L engine, California emissions

Emissioncontrol systemvacuumhose Irouting-1998 2.4L engine, Federal Iemissions I

93154v26

Emissioncontrol systemvacuumhose routing-1997 2.4L engine, Federal emissions

Elnission control systemvacuumhose routing-1998 2.4L engine, California elnissions

Emissioncontrol systemvacuumhose routing-1992 3.OLengines (SOHCand DDHC)w/traction control, California emissions

93154v31

Imission control systemvacuumhose -outing-l992 3.OLengines (SOHCand IOHC)w/out traction control, California :missions

DRIVEABILITYAND EMISSIONSCONTROL-S 4-43 Evaporatwe ernmon purge solenoid

Fuel pressure regulator

L. Light blue R. Red B Black

I

L Light blue R Red B Black

. Vehicle front

Fuel pressure regulator Vehicle front

93154~33

Emissioncontrol systemvacuumhose routing-1992 3.01 engines (SOHCand OOHC)w/out traction control, Federal emissions

93154V34

Emissioncontrol systemvacuumhose routing-1993-94 3.OLengines (SOHCand DOHC)w/out traction control, Federal emissions

Fuel pressure regulator R’ Red 0. Black

Vehicle front

Venlcle front 9315-M

Emissioncontrol systemvacuumhose routing-1996-96 3.OLengines (SOHCand DOHC)w/traction control, Federal emissions Evaporatwe em~smn purge solmold

Traction control vacuum so&old ,

931W3E

imission control systemvacuumhose routing-1992 3.OLengines SOHCand DOHC)w/traction control, Federal emissions Evaporawe emss~on purge solenoid

Tracuon control ,ventllatlon solmold

EGR solmold

\

G Y L R B

Green Yellow L,gnt blue Red 3lack

Fuel oressure regUlatOr Vetme front 93154v42

Emissioncontrol systemvacuumhose routing-1993-94 3.OLen-

imission control systemvacuumhose routing-1995-96 3.OLenlines (SOHCand DOHC)w/out traction control, Federal emjgsions

4-44 DRIVEABILITYAND EMISSIONS CONTROLS

Emission control system vacuum hose pouting-1993-96 3.OL engines (SOHC and DOHC) w/traction control, California emisrions

Emission control system vacuum hose routing-1993-96 3.OL engines (SOHC and DOHC) w/out traction control, California emissions

Emission control system vacuum hose routing-1998

Emission control system vacuum hose routing-199%00 w/out traction control

3.5L engine

Emission control system vacuum hose routing-1997 3.5L engine

Emission control system vacuum hose routing-1999-00 Mtraction control

3.5L engim

Emission control system vacuum hose routing-199940

3.OL engine

3.5L engine