Brake PORSCHE CAYMAN 2007 1.G User Guide

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,thepedaltraveltothepointofbrakeactuationshouldbe1-3/16"to1-9/16"or30to40mm.Wheneverthebrakepedaltravelexceedsthisdistance,havethebrakesystemchecked.
Brakepedal
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.Anyobstructionofthebrakepedalcouldincreasethestoppingdistance.
Alwayscheckthemovementofthebrakepedalbeforedrivingandmakesurethatitisnotobstructedbyafloormatoranyotherobject.
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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.
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Brakepads
Wearonthebrakepadsandbrakediscsdependstoagreatextentonthedrivingstyleandthecondi-tionsofuseandthereforecannotbeexpressedinactualmilesontheroad.
Thehigh-performancebrakesystemisdesignedforoptimalbrakingeffectatallspeedsandtemperatures.Certainspeeds,brakingforcesandambientconditions(suchastemperatureandhumidity)thereforemightcause”brakenoises“.
Newbrakepadsorlinings
Newbrakepadsandbrakediscshavetobe“brokenin”,andthereforeonlyattainoptimalfrictionwhenthecarhascoveredseveralhundredmilesorkm.Theslightlyreducedbrakingabilitymustbecompensatedforbypressingthebrakepedalharder.Thisalsoapplieswheneverthebrakepadsandbrakediscsarereplaced.
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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
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interrogatedandgoesoutwhentheengineisstartedifthecheckisnotyetcomplete.IftheABSwarninglampfailstogoout,thisindicatesthatABShasbeendeactivatedduetoafault.Ifthewarninglightsintheinstrumentpanelandon-boardcomputerlightupwhileyouaredriving,thisindicatesthatafaulthasoccurred.Inbothcases,normalbraking,asinvehicleswithoutABS,isstillretained.
TheABSsystemshould,however,beexaminedatanauthorizedPorschedealerimmediatelytopreventtheoccurrenceoffurtherfaults.
IftheABSsystembecomesinoperative,takeyourvehicletoyourauthorizedPorschedealerimmediately.
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.ThecontrolunitoftheABSbrakesystemissetforstandardtiresize.Ifnon-standardtiresareinstalled,thecontrolunitmaymisinterpretthespeedofthevehicle,becauseofthevariantdataitreceivesfromthesensorsontheaxles.
UseonlytiremakesandtypestestedbyPorsche.
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PorscheStabilityManagement
(PSM)
GeneralinformationregardingPSM
PSMisanactivecontrolsystemforstabilizationofthevehicleduringextremedrivingmaneuvers.
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.Theincreasedcontrolthatisprovidedshouldnotinduceyoutotakegreaterriskswithyoursafety.Thelimitsdictatedbythelawsofphysicscannotbeovercome,evenwithPSM.Theriskofaccidentsduetoinappropriatespeedcannotbereduced,evenbyPSM.Thedriverbearstheresponsibilityforalldrivingmaneuvers.
Adaptyourdrivingstyletotheprevailingroadandweatherconditions.
Obeyalltrafficlaws.
AdvantagesofPSM
–Superiortractionandlane-holdingabilityinalldrivingsituations-evenonroadsurfaceswithvaryingfriction.
–Thesystemcompensatesforundesiredvehi-clereactions(Ferrariaeffect)whenthedriverreleasestheacceleratorpedalorbrakeson
bends.Thiscompensationfunctionsuptothemaximumlateralacceleration.
–PSMactivelystabilizesthevehicleduringdynamicdrivingmaneuvers(e.g.rapidsteeringmovements,duringlanechangesoronalternatingcurves).
–Improvedbrakingstabilityincurvesandondifferentorvaryingroadsurfaces.
Readinessforoperation
PSMisswitchedonautomaticallyeverytimeyoustarttheengine.
Function
Sensorsatthewheels,brakes,steeringsystemandenginecontinuouslymeasure:
–Speed
–Directionoftravel(steeringangle)
–Lateralacceleration
–Rateofturnabouttheverticalaxis
PSMusesthesevaluestodeterminethedirectionoftraveldesiredbythedriver.PSMintervenesandcorrectsthecourseiftheactualdirectionofmotiondeviatesfromthedesiredcourse(steering-wheelposition):Itbrakesindividualwheelsasneeded.Inaddition,theenginepowermaybemanipulatedinordertostabilizethevehicle.
TheeventsbelowinformthedriverofPSMcontroloperationsandwarnhimtoadapther/hisdrivingstyletotheroadconditions:
–Themulti-functionalinformationlightontheinstrumentpanelflashes.
–Hydraulicnoisescanbeheard.
–Thevehicledeceleratesandsteering-wheelforcesarealteredasthePSMcontrolsthebrakes.
–Reducedenginepower.
–Thebrakepedalpulsatesanditspositionischangedduringbraking.Inordertoachievefullvehicledeceleration,footpressuremustbeincreasedafterbeginningofthebrakepedalpulsing.
ExamplesofPSMcontroloperations
–Ifthefrontwheelsofthevehicledriftonabend,therearwheelontheinsideofthebendisbrakedandtheenginepowerisreducedifnecessary.
–Iftherearofthevehicleswingsoutonabend,thefrontwheelontheoutsideofthebendisbraked.
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(brakecontrolintheeventofone-sidedwheelspin).
–Inconjunctionwithamessageontheon-boardcomputer,thelightindicatesthatPSMisswitchedoff.Anacousticsignalalsosounds.
–Faultsaredisplayedbythelightinconjunctionwithamessageontheon-boardcomputer.PSMisoutoforder.
PleaseconsultanauthorizedPorschedealer.
Pleaseobservethechapter”PUTTINGVEHICLEINTOOPERATION”onpage264.
Towing
Pleaseobservethechapter”TOWING”onpage287.
Checksonteststands
Whencarryingoutbraketestsonrollerteststandsamaximumtestingspeedof5mph(8km/h)mustnotbeexceeded.
Handbrakechecksontherollerbraketestermustbeperformedonlywiththeignitionswitchedoff.
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ParkingAids
ParkingAssistant(ParkAssistant)
Functionoftheparkingassistant
Whenthedriverbacksup,theparkingassistantsystemindicatesthedistancebetweenthecarandalargeobstaclebehindit,bymeansofsignaltones.
Danger!
Riskofseriouspersonalinjuryordeath.ParkAssistantcannotdetectsmallobjectssuchaschildrenandpets.Despiteuseoftheparkingassistantsystem,thedriverisstillresponsiblefortakingduecareandassessingobstacleswhenbackingup.
Makesurethatnopersons,especiallysmallchildren,animalsorobstaclesarewithinthemaneuveringarea.
Theparkingassistantsystemisactivatedautomati-callywhenreversegearisselectedandtheignitionison.
Note
Beawarethattheparkingassistantsystemisnotswitchedonifthecarrollsbackwardwithoutreversegearbeingengaged.
Ultrasoundsensors
Sensors
Fourultrasoundsensorsintherearbumpermeasurethedistancetotheclosestobstacle.
–Rangemiddlesensorsaround60in./150cm
–Rangeoutersensorsaround24in./60cm
Obstaclescannotbedetectedinthe“blind”sensorarea(e.g.neartheground).
Note
Thesensorsmustalwaysbekeptfreeofdust,iceandsnowinordertoensurethattheyarefullyfunctional.
Caution!
Toavoiddamagingthesensors:
Maintainsufficientdistancewhencleaningwithsteam-jetunits.
Signaltones/function
Whenreversegearisselected,theparkingassistantconfirmsthatitisswitchedonbyissuingashortsignaltone.Adetectedobstacleissignalledbyanintermittenttone.Theintervalsdecreaseastheobstacleisapproached.Acontinuoustonesoundswhenthedistancebecomeslessthanonefoot.Thiscontinuoustonecanstopiftheobstacleisapproachedcloserthanonefoot.Theradiovolumeshouldnotbesoloudastodrownoutthesignaltones.
Limitsofultrasonicmeasurement
Theparkingassistantsystemcannotdetect:
–sound-absorbingobstacles(e.g.winteroperation,powdersnow),
–sound-reflectingobstacles(e.g.glasssurfaces,flatpaintedsurfaces)
–andverythinobstacles.
Otherultrasoundsources(e.g.pneumaticbrakesofothervehicles,jackhammers)caninterferewithdetectionofobstacles.
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0-Initialposition1-Ignitionon2-Startengine3-Ignitionoff
Ignition/StarterSwitchwith
anti-theftSteeringLock
Theignitionlockhasatotaloffourignitionlockpositions.Theignitionkeyreboundstotheinitialpositionfromeveryignitionlockposition.
Foryoursafety,fastensafetybelts.
Pleaseobservethechapter”IMMOBILIZER”onpage22.
Pleaseobservethechapter”KEYWITHRADIOREMOTECONTROL”onpage23.
Beforestartingtheengine
Applythefootbrake.
Manualtransmission:Movethegearshiftleverintoneutral.Theclutchpedalmustbedepressedfullybeforethestarterwillengage.
Tiptronic:MovetheselectorlevertoPorN.
Switchposition0
Initialposition
Theignitionkeycannotbewithdrawnwhentheignitionisswitchedonorwhentheenginehasbeenstarted.
Towithdrawtheignitionkey:
Stopthevehicle.
OnvehicleswithTiptronicS:MoveselectorlevertopositionP.
Switchignitionoff.
Removeignitionkey.
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StartingandStoppingEngine
StartingProcedures
Pleaseobservethechapter”IMMOBILIZER”onpage22.
Pleaseobservethechapter”EMISSIONCONTROLSYSTEM”onpage220.
Warning!
Seriouspersonalinjuryordeathmayresultifyouareinvolvedinacollisionwithouthavingfastenedthesafetybelts.
Fastensafetybeltsbeforedrivingaway.
Beforestartingtheengine
Applythefootbrake.
Manualtransmission:Movethegearshiftleverintoneutral.Theclutchpedalmustbedepressedfullybeforethestarterwillengage.
Tiptronic:MovetheselectorlevertoPorN.
Temperaturesensorsontheengineautomaticallyprovidethecorrectfuel/airmixturerequiredforstarting.Therefore,itisnotnecessarytodepresstheacceleratorpedalwhilestartingacoldorawarmengine.
Startingtheengine
Turnignitionkeytoignitionlockposition2.
Assoonastheenginestarts,releasetheignitionkey.
Thefirstoperationofthestarterisendedautomat-icallywhentheenginestarts.Iftheenginedoesnotstart,subsequentstarteroperationswillnotbeendedautomatically.
Iftheenginefailstostartafter10or15secondsofcranking:
Waitabout10secondsbeforeengagingthestarteragain.
Whenstartingtheengine,bereadytodriveimmediately.Drivevehicleatmoderatespeedsandavoidenginespeedsabove4200rpmduringthefirst5minutes.
Donotlettheengineidletowarmup.
Danger!
Engineexhaustfumeshavemanycompo-nentswhichyoucansmell.Theyalsocontaincarbonmonoxide(CO),whichisacolorlessandodorlessgas.Carbonmonoxidecancauseunconsciousnessandevendeathifinhaled.
Neverstartorlettheengineruninanenclosed,unventilatedarea.Itisnotrec-ommendedtositinyourcarforprolongedperiodswiththeengineonandthecarnotmoving.
Danger!
Anunattendedvehiclewitharunningengineispotentiallyhazardous.Ifwarninglightsshouldcomeontoindicateimproperopera-tion,theywouldgounnoticed.
Neverleavetheengineidlingunattended.
Danger!
Dangerofre.
Donotparkoroperatethevehicleinareaswherethehotexhaustsystemmaycomeincontactwithdrygrass,brush,fuelspillorotherflammablematerial.
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