2007 PORSCHE 911 CARRERA traction control

Breakinhintsfortherst2000
miles/3000kilometers
ThefollowingtipswillbehelpfulinobtainingoptimumperformancefromyournewPorsche.
Despitethemostmodern,high-precisionmanufac-turingmethods,themovingpartsmuststillwearinwitheachother.Thiswearing-inoccursmainlyinthefirst2000miles/3000km.
Therefore:
Preferablytakelongertrips.
Avoidfrequentcoldstartswithshort-distancedrivingwheneverpossible.
Avoidfullthrottlestartsandabruptstops.
Donotexceedmaximumenginespeedof4200rpm(revolutionsperminute).
DonotrunacoldengineathighrpmeitherinNeutraloringear.
Donotlettheenginelabor,especiallywhendrivinguphill.Shifttothenextlowergearintime(usethemostfavorablerpmrange).
Neverlugtheengineinhighgearatlowspeeds.Thisruleappliesatalltimes,notjustduringthebreak-inperiod.
Donotparticipateinmotorracingevents,sportsdrivingschools,etc.duringthefirst2000miles/3000kilometers.
Theremaybeaslightstiffnessinthesteering,gear-shiftingorothercontrolsduringthebreak-inperiodwhichwillgraduallydisappear.
Breakinbrakepadsandbrakediscs
Newbrakepadsanddiscshavetobe“brokenin”,andthereforeonlyattainoptimalfrictionwhenthecarhascoveredseveralhundredmilesorkm.Theslightlyreducedbrakingabilitymustbecompensatedforbypressingthebrakepedalharder.Thisalsoapplieswheneverthebrakepadsandbrakediscsarereplaced.
Newtires
Newtiresdonothavemaximumtraction.Theytendtobeslippery.
Breakinnewtiresbydrivingatmoderatespeedsduringthefirst60to120miles/100to200km.Longerbrakingdistancesmustbeanticipated.
Engineoilandfuelconsumption
Duringthebreak-inperiodoilandfuelconsumptionmaybehigherthannormal.
Pleaseobservethechapter”TECHNICALDATA”onpage328.
Asalways,therateofoilconsumptiondependsonthequalityandviscosityofoil,thespeedatwhichtheengineisoperated,theclimateandroad
conditions,aswellastheamountofdilutionandoxidationofthelubricant.
Makeahabitofcheckingengineoilwitheveryrefueling,addifnecessary.
Controls,Instruments19

Four-WheelDrive
Enginepower
Withthefour-wheeldrive,theenginepowerisvariablydistributedtothefrontandrearwheels.Powerdistributionandwheelspeedcompensationbetweenthefrontandrearaxlesisrealisedwithaviscousmultiple-discclutch.
Distributionoftheenginepowerisdependentuponthewheelspeeddifferencebetweenthetwoaxles.Theviscousmultiple-discclutchalwaysdeliverssufficientdrivepowertothefrontwheels(approx.5%to40%)toensureoptimumtractionevenonapoorroadsurface.
IncombinationwiththePorscheStabilityManagement(PSM),four-wheeldriveimproveshandlingandincreasesdrivingstability.
Warning!
Theincreasedcontrolthatisprovidedshouldnotinduceyoutotakegreaterriskswithyoursafety.Thelimitsdictatedbythelawsofphysicscannotbeovercome,evenwithfour-wheeldrive.Theriskofaccidentsduetoinappropriatespeedcannotbereduced,evenbyfour-wheeldrive.Thedriverbearstheresponsibilityforalldrivingmaneuvers.
Adaptyourdrivingstyletotheprevailingroadandweatherconditions.
Obeyalltrafficlaws.Dynamometertestingprocedure
SomeU.S.statesandCanadianprovincesconductemissionsinspection/maintenancetestinginvolvingtheuseoftwo-wheeldynamometer.Atwo-wheeleddynamometerisatreadmilltypedeviceuponwhichasingleaxleofthecar,thedrivingaxleofthevehicle,rotatestosimulatevehicleoperationontheroadwhilethevehicleremainsstationary.
Thefull-timefour-wheeldrivesystemofyourvehiclecannotbedisabled.Severedamagetothepowertraincanresultiftestedonatwo-wheeldynamometer.
Warning!
Toavoidseverepowertraindamageandapossibleunexpectedmovementofthevehicle.
Vehicleswithfour-wheeldrivemustneverbetestedonatwo-wheeldynamometer.
Advisetheemissionstationofthiswarningbeforetestingthevehicle.
Powermeasurement
PowermeasurementsondynamometersarenotapprovedbyPorsche.
66Controls,Instruments

RetractableRearSpoiler
Functionoftheretractablerearspoiler
Therearspoilerimprovesdrivingstability,especial-lyathigherspeeds.
Warning!
Riskofaccident.Iftherearspoilercannotbeextended,drivingstabilitywillbeadverselyaffectedbyincreasedrearaxlelift,whichcouldleadtolossofcontrol.
Adaptyourdrivingstyleandspeedtothechangeddrivingbehavior.
HavethefaultremediedatanauthorizedPorschedealer.
Warning!
Riskofinjuryduringmanualretractionorextensionoftherearspoilerwiththevehiclestationary.
Makesurethatnopersonsorobjectsarewithintherangeofmovementoftherearspoiler.
Warning!
Riskofdamagefrompushingthevehiclebythespoiler.
Donotpushthevehicleatthespoiler.
Automaticmode
Conditions
Thelimitsforautomaticextensionandretractionofthespoilerdependonvariouscircumstances(e.g.drivingspeed,enginecompartmenttemperature).
Ifautomaticcontrolfails,awarningmessageisdisplayedbytheon-boardcomputer.
Enginecompartmenttemperatureunder
122°F/55°C
Spoilerextendsat75mph/120km/handretractsat37mph/60km/h.
Enginecompartmenttemperatureover
140°F/60°C
Spoilerextendsat50mph/80km/handretractsat19mph/30km/h.
68Controls,Instruments

Brakes
Generalinformation
Makeitahabittochecktheoperationofyourbrakesbeforedriving.
Keepinmindthatthebrakingdistanceincreasesveryrapidlyasthespeedincreases.At60mphor100km/h,forexample,itisnottwicebutfourtimeslongerthan30mphor50km/h.Tiretractionisalsolesseffectivewhentheroadsarewetorslippery.
Therefore,alwaysmaintainasafedistancefromthecarinfrontofyou.
VehicleswithoutPorscheCeramic
CompositeBrake(PCCB)
Eventhoughthebrakediscsconsistofalloyedgreycastiron,theywillunavoidablystarttocorrodeifyourcarisparkedforanextendedperiod.Thebrakeswilltendto“rub”asaresult.Thenature,extentandeffectsofcorrosiondependontheamountoftimethevehiclewasparked,whethergranularorliquidroadsaltwasspreadandwhethergrease-dissolvingagentswereusedincarwashes.Ifthebrakingcomfortisnoticeablyimpaired,werecommendhavingthebrakesystemcheckedbyexpertsatanauthorizedPorschedealer.
Brakesystemfunction
YourPorscheisequippedwithapowerassistedhydraulicdualcircuitbrakesystemwithdiscbrakesatthefrontandrear.Bothcircuitsfunctionindependently.Onebrakecircuitoperatesthefrontandtheotheroperatestherear.
Ifonebrakecircuithasfailed,theotherwillstilloperate.However,youwillnoticeanincreasedpedaltravelwhenyouapplythebrakes.Failureofonebrakecircuitwillcausethestoppingdistancetoincrease.
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.Intheunlikelyeventofhydraulicfailureofonebrakecircuit:
Pushthebrakepedaldownfirmlyandholditinthatposition.Amechanicallinkageactivatesthesecondcircuit,andyouwillbeabletobringthevehicletoastop.
Afterbringingyourvehicletoacompletestop,avoiddrivingthevehicleandinsteadhaveittowedtothenearestauthorizedPorschedealerforrepair.
BrakewarninglightUSA
BrakewarninglightCanada
Ifthewarninglightsintheinstrumentpanelandon-boardcomputergoonwhiledriving,thebrakefluidlevelmaybetoolow,or(ifthebrakepedaltravelhasincreased)oneofthetwobrakecircuitsmayhavefailed.
Agreaterbrakingpressurewillberequired,stoppingdistanceswillbelongerandthebrakingbehaviorwillchange,particularlyincurves.
Withcorrectlyadjustedbrakes,andacorrectlyworkingbrakesystem,thepedaltraveltothepointofbrakeactuationshouldbe1-3/16in.to1-9/16in.or30mmto40mm.Wheneverthebrakepedaltravelexceedsthisdistance,havethebrakesystemchecked.
Brakepedal
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.Anyobstructionofthebrakepedalcouldincreasethestoppingdistance.
Alwayscheckthemovementofthebrakepedalbeforedrivingandmakesurethatitisnotobstructedbyafloormatoranyotherobject.
72Controls,Instruments

Securethefloormattopreventitfromslidingintopositionsthatcouldinterferewiththesafeoperationofyourvehicle.YourPorschedealerwillbegladtoofferyounonskidfloormatsofthecorrectsize.
Note
Incaseoneofthetwobrakecircuitsfails,increasedpedaltravelisrequiredtobringyourvehicletoafullstop.
Warning!
Toavoidoverheatingandprematurewearofthebrakes:
Beforedescendingasteepgrade,reducespeedandshiftthetransmissionintoalowergearordrivingpositiontocontrolspeed.
Donot“ridethebrakes”byrestingyourfootonthepedalwhennotintendingtoapplybrakepressure.
Donotholdthepedaldowntoolongortoooften.Thiscouldcausethebrakestogethotandnotfunctionproperly.
Brakebooster
Thebrakeboosterassistsbrakingonlywhentheengineisrunning.
Whenthecarismovingwhiletheengineisnotrunning,orifthebrakeboosterisdefective,morepressureonthebrakepedalisrequiredtobringthecartoastop.Ifthishappens,ABSandPSMwillalsonotoperate.
Moistureorroadsaltonbrakesaffectsbraking.Whenthevehicleisdrivenonsaltedroadsforextendedperiods,thebrakesshouldbewasheddownthoroughlyaboutevery2weeks.Anauto-maticcarwashfacilitycannotdothisjobproperly.Brakeswilldryafterafewcautiousbrakeapplica-tions.
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.Drivingthroughwatermayreducetraction.Moistureonbrakesfromroadwater,carwash,orcoatingofroadsaltmayaffectbrakingefciency.
Cautiouslyapplybrakestotestbrakesafterbeingexposed.
Brakewear
Yourcarhasexcellentbrakes,buttheyarestillsubjecttowear.Therateatwhichtheyweardependsonhowthebrakesareused.
HavethebrakesysteminspectedattheintervalsrecommendedinyourMaintenanceBooklet.
WarninglightUSA
WarninglightCanada
Ifthewarninglightsintheinstrumentpanelandon-boardcomputerstayonwhentheengineisrunningorcomeonwhiledriving,thebrakepadsareworn,excessively.
Donotcontinuetooperatethevehicle.HaveyourauthorizedPorschedealerinspectorreplacethebrakepads.
Controls,Instruments73

ABSBrakeSystem
(AntilockBrakeSystem)
TheABSsystemrepresentsamajorcontributiontotheenhancementofactivesafetyinyourvehicle.Thissystempreventsthewheelsfromlockinginapanicstoponalmostallroadsurfaces.
WiththeABSsysteminyourvehicle,the
followingareasareenhanced:
Steering,vehicleremainssteerableunderallbrakingforceswhenABSisengaged.
Gooddirectionalcontrol,noswervingcausedbylockingofwheelsunderbrakingconditions.
Shorterstoppingdistance,stoppingdistancesareusuallyreducedbecausecontrolledbrakingismaximized.
Preventionofwheellockup,nobrake-inducedslidingandthusnolocalizedtirewearfromemergencybraking.
ThecrucialadvantageoftheABSsystemoveraconventionalbrakesystemisintheareaofmaintainingdirectionalcontrolandmaneuverabilityofthecarinemergencysituations.
Warning!
Theincreasedcontrolthatisprovidedshouldnotinduceyoutotakegreaterriskswithyoursafety.Thelimitsdictatedbythelawsofphysicscannotbeovercome,evenwithABS.Theriskofaccidentsduetoinappropriatespeedcannotbereduced,evenbytheABS.Thedriverbearstheresponsibilityforalldrivingmaneuvers.
Adaptyourdrivingstyletotheprevailingroadandweatherconditions.
Obeyalltrafficlaws.
Warning!
OthervehiclesnotequippedwiththeABSsystemmaynotbeabletomaintaincontrol,especiallyonwetorpoorroadsurfacesandthusmaybemorelikelytoimpactyoufrombehind.
Tominimizethatrisk,useyourABSsystemtoincreaseyourabilitytomaneuvertoavoiddangeroussituationsandnotmerelytotrytostopintheshortestdistancepossible.
OperationoftheABSsystem
Awheelspeedsensorismountedtoeachofthefourwheels.Ifwheellock-upofeitherofthefrontwheelsortherearwheelsissensedduringbraking,thebrakepressureisadjustedautomaticallyuntilthewheelnolongerslips.
Ifbrakingforcesapproachthewheellock-uppointforallwheels(panicbraking)theABSsystemwillintervenetoprovidearapidrythmicbraking.TheproperoperationofABSisperceivedbythedriverasapulsatingbrakepedalinconjunctionwithaudiblenoiseandperhapssomevibration.
Ifyouexperiencethesesensationswhiledrivingoraroadsurfacewithquestionabletraction,reducevehiclespeedappropriatefortheprevailingroadconditions.
Iffullbrakingshouldbenecessary,pressthebrakepedalallthewaydownthroughouttheentirebrakingprocedure,regardlessofthepulsatingpedal.Donoteaseuponpressureappliedtothepedal.
ThefunctionalreadinessofallthemainelectricalcomponentsoftheABSischeckedbyanelectronicmonitoringsystembothbeforeandwhileyoudrive.
WarninglightUSA
WarninglightCanada
WhentheignitionisswitchedontheABSwarninglightwilllightupwhilethesystemiselectronically
Controls,Instruments75

PorscheStabilityManagement
(PSM)
GeneralinformationregardingPSM
PSMisanactivecontrolsystemforstabilizationofthevehicleduringextremedrivingmanoeuvres.ThemostrecentversionofPSM(onlyonvehicleswithfour-wheeldrive)improvesthebrakesystemfunctionality.
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.Theincreasedcontrolthatisprovidedshouldnotinduceyoutotakegreaterriskswithyoursafety.Thelimitsdictatedbythelawsofphysicscannotbeovercome,evenwithPSM.Theriskofaccidentsduetoinappropriatespeedcannotbereduced,evenbyPSM.Thedriverbearstheresponsibilityforalldrivingmaneuvers.
Adaptyourdrivingstyletotheprevailingroadandweatherconditions.
Obeyalltrafficlaws.
AdvantagesofPSM
–Superiortractionandlane-holdingabilityinalldrivingsituations-evenonroadsurfaceswithvaryingfriction.
–Thesystemcompensatesforundesiredvehi-clereactions(Ferrariaeffect)whenthedriverreleasestheacceleratorpedalorbrakesonbends.Thiscompensationfunctionsuptothemaximumlateralacceleration.
–PSMactivelystabilizesthevehicleduringdynamicdrivingmaneuvers(e.g.rapidsteeringmovements,duringlanechangesoronalternatingcurves).
–Improvedbrakingstabilityincurvesandondifferentorvaryingroadsurfaces.
–Itimprovesthebrakingfunctionsandshortensthestoppingdistanceifemergencybrakingisneeded(onlyvehicleswithfour-wheeldrive).
Readinessforoperation
PSMisswitchedonautomaticallyeverytimeyoustarttheengine.
Function
Sensorsatthewheels,brakes,steeringsystemandenginecontinuouslymeasure:
–Speed
–Directionoftravel(steeringangle)
–Lateralacceleration
–Rateofturnabouttheverticalaxis
PSMusesthesevaluestodeterminethedirectionoftraveldesiredbythedriver.PSMintervenesandcorrectsthecourseiftheactualdirectionofmotion
deviatesfromthedesiredcourse(steering-wheelposition):Itbrakesindividualwheelsasneeded.Inaddition,theenginepowermaybemanipulatedinordertostabilizethevehicle.
TheeventsbelowinformthedriverofPSMcontroloperationsandwarnhimtoadapther/hisdrivingstyletotheroadconditions:
–Themulti-functionalinformationlightontheinstrumentpanelflashes.
–Hydraulicnoisescanbeheard.
–Thevehicledeceleratesandsteering-wheelforcesarealteredasthePSMcontrolsthebrakes.
–Reducedenginepower.
–Thebrakepedalpulsatesanditspositionischangedduringbraking.Inordertoachievefullvehicledeceleration,footpressuremustbeincreasedafterbeginningofthebrakepedalpulsing.
ExamplesofPSMcontroloperations
–Ifthefrontwheelsofthevehicledriftonabend,therearwheelontheinsideofthebendisbrakedandtheenginepowerisreducedifnecessary.
–Iftherearofthevehicleswingsoutonabend,thefrontwheelontheoutsideofthebendisbraked.
Controls,Instruments79

wearoneandahalf(1-1/2)timesaswellonthegovernmentcourseasatiregraded100.Therelativeperformanceoftiresdependsupontheactualconditionsoftheiruse,however,andmaydepartsignificantlyfromthenormduetovariationsindrivinghabits,servicepracticesanddifferencesinroadcharacteristicsandclimate.
TractionAA,A,B,C
Thetractiongrades,fromhighesttolowest,areAA,A,B,andCandtheyrepresentthetire’sabilitytostoponwetpavementasmeasuredundercontrolledconditionsonspecifiedgovernmenttestsurfacesofasphaltandconcrete.AtiremarkedCmayhavepoortractionperformance.
Warning!
Thetractiongradeassignedtothisisbasedonbraking(straight-ahead)tractiontestsanddoesnotincludecornering(turned)traction,acceleration,hydroplaningorpeaktractioncharacteristics.
TemperatureA,B,C
ThetemperaturegradesareA(thehighest),BandC,representingthetire’sresistancetothegenerationofheatanditsabilitytodissipateheatwhentestedundercontrolledconditionsonaspecifiedindoorlaboratorytestwheel.Sustainedhightemperaturescancausethematerialof
thetiretodegenerateandreducetirelife,andexcessivetemperaturecanleadtosuddentirefailure.ThegradeCcorrespondstoalevelofperformancewhichallpassengercartiresmustmeetundertheFederalMotorVehicleSafetyStandardNo.109.GradesBandArepresenthigherlevelsofperformanceonthelaboratorytestwheelthantheminimumrequiredbylaw.
Warning!
Thetemperaturegradeforthistireisestab-lishedforatirethatisproperlyinflatedandnotoverloaded.Excessivespeed,underinfla-tion,orexcessiveloading,eitherseparatelyorincombination,cancauseheatbuildupandpossibletirefailure,resultinglossofcontrol,leadingtoseriouspersonalinjuryordeath.
Tirepressures
Warning!
Incorrecttirepressurecausesincreasedtirewearandadverselyaffectsroadhandling.Thiscouldleadtotirefailure,resultinginlossofcontrol,leadingtoseriouspersonalinjuryordeath.
Alwaysuseanaccuratetirepressuregaugewhencheckinginflationpressures.
Donotexceedthemaximumtirepressurelistedonthetiresidewall.
Pleaseobservethechapter”TIREPRESSUREPLATE”onpage327.
Coldtireinflationpressuremeans:alltiresmustbecold,ambienttemperaturemaximum(68°F/20°C),whenadjustingtheinflationpressure.Avoidsunlightstrikingthetiresbeforemeasuringcoldpressures,sincethepressureswouldrisefromtemperatureinfluence.
Valvecapsprotectthevalvefromdustanddirt,andthusfromleakage.Alwaysscrewcapstightlydown.Replacemissingcapsimmediately.
Useonlyplasticvalvecaps.
268PracticalTips,EmergencyService