2007 PORSCHE CAYMAN Tire size

interrogatedandgoesoutwhentheengineisstartedifthecheckisnotyetcomplete.IftheABSwarninglampfailstogoout,thisindicatesthatABShasbeendeactivatedduetoafault.Ifthewarninglightsintheinstrumentpanelandon-boardcomputerlightupwhileyouaredriving,thisindicatesthatafaulthasoccurred.Inbothcases,normalbraking,asinvehicleswithoutABS,isstillretained.
TheABSsystemshould,however,beexaminedatanauthorizedPorschedealerimmediatelytopreventtheoccurrenceoffurtherfaults.
IftheABSsystembecomesinoperative,takeyourvehicletoyourauthorizedPorschedealerimmediately.
Warning!
Riskofanaccident,resultinginseriouspersonalinjuryordeath.ThecontrolunitoftheABSbrakesystemissetforstandardtiresize.Ifnon-standardtiresareinstalled,thecontrolunitmaymisinterpretthespeedofthevehicle,becauseofthevariantdataitreceivesfromthesensorsontheaxles.
UseonlytiremakesandtypestestedbyPorsche.
70Controls,Instruments

TPCTirePressureMonitoring
Function
Pleaseobservethechapter”TIREPRESSUREFORCOLDTIRES”onpage299.
TheTirePressureMonitoringcontinuouslymoni-torstirepressureandtiretemperatureonallfourwheelsandwarnsthedriverwhenthetirepressureistoolow.
ThedisplayaswellasthesettingsfortheTirePressureMonitoringtakeplaceontheon-boardcomputer.However,youmuststilladjustthetirepressureonthewheel.
Thedriverisresponsibleforfillingthetirescorrectlyandmakingthecorrectsettingsontheon-boardcomputer.
TheTirePressureMonitoringoffersthefollowingfunctions:
–Displayoftheactualtirepressurewhilethevehicleisinmotion
–Displayofthedeviationfromtherequiredpressure(refillingpressure)
–Displayofcurrentlysettiresizeandtype
–Tirepressurewarningsintwostages
Caution!
DespitetheadvantagesofferedbytheTirePressureMonitoring,itisstillthedriver’sresponsibilitytoupdatethecorrespondingsettingsintheon-boardcomputerandmaintainthepressureinthetires.Lowtirepressurereducestheroadsafetyofthevehicleanddestroysthetireandwheel.
Whenaflattirehasbeendisplayed,immediate-lystopinasuitableplaceandcheckthetiresfordamage.Ifnecessary,remedythedamagewithatiresealant.
Donotbyanymeanscontinuetodrivewithdefectivetires.
Sealingthetirewithtiresealantisonlyanemergencyrepair,soyoucandrivetothenextauthorizedPorschedealer.Themaximumpermittedspeedis50mph(80km/h).
Donotdrivewithtireswhosetirepressuredropsagaininashortperiodoftime.Incasesofdoubt,havetirescheckedbyanauthorizedPorschedealer.
DamagedtiresmustbeimmediatelyreplacedbyanauthorizedPorschedealer.Tirerepairsarenotpermissibleunderanycircumstances.
IftheTirePressureMonitoringisdefective(e.g.defectivewheeltransmitter),contactanauthorizedPorschedealerimmediatelyandhavethedamagerepaired.ThetirepressurewillnotbemonitoredbyadefectiveTirePressureMonitoring.
Tiresloseairovertimewithoutatiredefectbeingpresent.Atirepressurewarningwillthenappearintheon-boardcomputerdisplay.Correctthetirepressureatthenextopportunity.
TheTirePressureMonitoringgivesawarningabouttiredamageduetonaturalpressurelossaswellasaboutagraduallossofpressureduetoforeignobjects.TheTirePressureMonitoringcannotwarnyouabouttiredamagethatoccurssuddenly(e.g.flattireduetoabruptexternaleffects).
122Controls,Instruments

TiretypeinfoinTirepressuremenu
Informationaboutthecurrentlysettires:
–Tiretype:Summertires,wintertires
–Tiresize:17,18,19inch
“Infotires”showsthecurrenttiresettings.
Callingupthe“Infotires”display
Pushoperatingleverforwardinordertoswitchontheselectionfield.
Select“TPC”withtheoperatinglever.
Pushoperatingleverforward.ThedisplaychangestotheTirepressuremenu.
Select“Infotires”withtheoperatinglever.
Pushoperatingleverforward.
Tireselectioninthe“Set”menu
Pushoperatingleverforwardinordertoswitchontheselectionfield.
Select“TPC”withtheoperatinglever.
Pushoperatingleverforward.ThedisplaychangestotheTirepressuremenu.
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Selecttheappropriatetiresize(17,18or19inch)andpushoperatingleverforwards.Adisplayforconfirmingtheselectedtiresizeappears.
Note
Thismenuisonlydisplayedwhendifferenttiresizesareapproved.
Select“Continue”andpushtheoperatingleverforward.Settingofthetirecharacteristicshasonlybeensuccessfullycompletedwhenthemessage“Processcomplete”isdisplayedbytheon-boardcomputer.
Selectarrow(Back)andpushtheoperatingleverforward.ThedisplayreturnstotheTirepressuremenu.Theon-boardcomputeradditionallydisplaysthemessage“Systemlearning”.
Note
Themessage“Processaborted”appearsifthesettingprocessisinterrupted.Allentriesmadeuptothispointarelost,andtheoriginalsettingsremainineffect.Onlyifthemessage“Process
126Controls,Instruments

complete”appearsafterthesettingshavebeenmadewilltheTirePressureMonitoringre-learnthewheels.
Pleaseobservethechapter”SYSTEMLEARN-ING”onpage128.
Beforefittingtireswithsizeswhicharenotstoredintheon-boardcomputer,themissinginformationshouldbesupplementedintheon-boardcomputer.
PleaseconsultyourauthorizedPorschedealer.
UseonlytiresapprovedbyPorsche.
TheavailableitemsintheTirepressuremenudependontheequipmentofyourvehicle.Forthisreasonitispossiblethatsomeoftheitemsshownherearenotavailableonyouron-boardcomputer’sdisplay.Tirepressurewarnings
TheTirePressureMonitoringwarnsaboutlossinpressureintwostages,dependingontheamountofpressureloss:
Stage1-Addair(3to6psi(0.2to0.4bar)lossinpressure)
Stage2-Flattire(from6psi(0.4bar)lossinpressure)
Stage1-Addair
Thepressureinthetireistoolowby3to6psi(0.2to0.4bar).Drivingwithinsufficienttirepressurereducestheroadsafetyofthevehicleanddestroysthetireandwheel.
Thetirepressurewarningcontainstheaffectedtirewiththetirepressuretobeadded.Correctthetirepressureatthenextopportunity.
Thistirepressurewarningappearswithvehiclestoppedandcanbeacknowledged.Thetirepressurewarninglightintheinstrumentpanelgoesoutwhenthetirepressurehasbeencorrected.
Stage2-Flattire
Thepressureinthetirehasdroppedbymorethan6psi(0.4bar).Thissignificantpressurelossisadangertoroadsafety.
Controls,Instruments127

Donotusecommerciallyavailablesealantortireinflatingbottles.OnlyusePorscheapprovedtiresealant.
Pleaseobservethechapter”TIREPRESSUREFORCOLDTIRES”onpage299.
Eachtire,includingthespare(ifprovided),shouldbecheckedevery2weekswhencold(68°F/20°C)andinflatedtotheinflationpres-surerecommendedinthisOwner’sManualoronthetire-pressureplate.IfyourvehiclehastiresofadifferentsizethanthesizeindicatedinthisOwner’sManualoronthetire-pressureplate,youshoulddeterminethepropertireinflationpressureforthosetires.
Asanaddedsafetyfeature,yourvehiclehasbeenequippedwithatirepressuremonitoring(TPC)thatilluminatesalowtirepressuremessagewhenoneormoreofyourtiresissignificantlyunder-inflated.Accordingly,whenthelowtirepressuremessageilluminates,youshouldstopandcheckyourtiresassoonaspossible,andinflatethemtotheproperpressure.Drivingonasignificantlyunder-inflatedtirecausesthetiretooverheatandcanleadtotirefailure.Under-inflationalsoreducesfuelefficiencyandtiretreadlife,andmayaffectthevehicle’shandlingandstoppingability.
PleasenotethattheTPCisnotasubstituteforpropertiremaintenance,anditisthedriver’sresponsibilitytomaintaincorrecttirepressure,evenifunder-inflationhasnotreachedthelevelto
triggerilluminationoftheTPClowtirepressuremessage.
Onvehicleswithtirepressuremonitoring:
Pleaseobservethechapter”TPCTIREPRESSUREMONITORING”onpage122.
Whentiresarewarm,thetirepressureisincreased.
Neverletairoutofhottires.Thiscouldcausethetirepressuretofallbelowtheprescribedvalue.
Insufficienttirefillingpressurecancausetirestooverheatandthusbedamaged-eveninvisibly.Hid-dentiredamageisnoteliminatedbysubsequentlycorrectingthetirepressure.
Overloading
Danger!
Riskofdamagetovehicleparts,lossofcontrolandseriouspersonalinjuryordeath.
Donotoverloadyourvehicle.Becarefulabouttheroofload.
Ifloadingthevehiclealsocorrectthetirepressure.Tirepressureforloadedvehiclecanbefoundonthetirepressureplateandinthechaptertechnicaldata.
Neverexceedthespecifiedaxleload.Over-loadingcanshortentheservicelifeofthetiresandcar,aswellasleadtodangerousvehiclereactionsandlongbrakingdistances.Damageduetooverloadingisnotcoveredbythevehi-clewarranty.
Pleaseobservethechapter”LOADINGINFORMATION”onpage248.
Pleaseobservethechapter”TIREPRESSUREFORCOLDTIRES”onpage299.
PracticalTips,EmergencyService239

Exampleofatirepressureplate
Tirepressureplate
Informationonthetirepressureplate
ASeatingcapacityMaximumnumberofvehicleoccupants,includingthedriver.
BVehicleloadlimitIsthemaximumtotalweightlimitspecifiedoftheload(passengersandcargo)forthevehicle.Thisisthemaximumweightofpassengersandcargothatcanbeloadedintothevehicle.Pleaseobservethechapter”LOADINGINFORMATION”onpage248.
CTiresizeforthefrontaxleCheckwithyourauthorizedPorschedealeraboutthecurrentreleasestatus.
DRecommendedtirepressureforthefrontaxleThesevaluesareforcoldtires(68°F/20°C).
ETiresizefortherearaxleCheckwithyourauthorizedPorschedealeraboutthecurrentreleasestatus.
FRecommendedtirepressurefortherearaxleThesevaluesareforcoldtires(68°F/20°C).
GInvehicleswithcollapsiblesparewheel:Sizeandtirepressureofthesparewheel.
Tiretraction
Warning!
Whendrivingonwetorslushyroads,awedgeofwatermaybuildupbetweenthetiresandtheroad.Thisphenomenonisknownas“hydroplane”andmaycausepartialorcompletelossoftraction,vehiclecontrolorstoppingability.
Reducespeedonwetsurfacetopreventthis.
Tirelife
Tirelifedependsonvariousfactors,i.e.,roadsurfaces,trafficandweatherconditions,drivinghabits,typeoftiresandtirecare.
Inspectyourtiresforwearanddamagebeforedrivingoff.Ifyounoticeunevenorsubstantialwear,wheelsmightneedalignmentortiresshouldbebalancedorreplaced.
240PracticalTips,EmergencyService

ExampleofInscription
Inscriptiononradialtire
ATiresize
Example:P265/40ZR18101Y
–P-ThetireisdesignedforPassengervehicle.Thisinformationisnotincludedonalltires.
–265-Indicationoftirewidthinmm
–40-Indicationoftireheighttotirewidthratioinpercent
–ZR-codeletterforradialtiresforspeedsabove150mph/240km/h.Therearecur-rentlynostandardsconcerningtirestrengthatspeedsabove150mph(240km/h).
–R-Belttypecodeletterforradial
–18-Indicationofrimdiameterininches
–101-Loadcapacitycoefficient
–Y-Speedcodeletter
–XL(ExtraLoad)-Tirewithincreasedloadrating
BTIN(TireIdenticationNumber)
Example:DOTxxxxxxxxxxxx
–DOTTheDOTsymbolindicatesthatthetirescomplywiththerequirementsoftheUSDepartmentofTransportationandprovidesinformationabout:
–firsttwo-digitcodemeansmanufacture’sidentificationmark.
–secondtwo-digitcodemeanstiresize.
–thirdfour-digitcodemeanstiretypecode.
246PracticalTips,EmergencyService