wheel PORSCHE 911 CARRERA 2003 4.G User Guide
[x] Cancel search | Manufacturer: PORSCHE, Model Year: 2003, Model line: 911 CARRERA, Model: PORSCHE 911 CARRERA 2003 4.GPages: 263, PDF Size: 28.48 MB
Page 45 of 263
t>Donotaddanyadditionalcoveringsor
stickerstothesteeringwheelorinthearea
ofthepassengerairbagandsideairbags.
Doingsomayadverselyaffectthefunctioning
oftheairbagsystemorcauseharmtothe
occupantsiftheairbagsystemshoulddeploy.
t>Donotundertakeanywiringforelectricalac-
cessoryequipmentinthevicinityoftheairbag
wiringharnesses.Doingsomaydisablethe
airbagsystemorcauseinflation.
t>Ifthewarninglightcomeson,theairbagsys-
temshouldberepairedimmediatelybyyour
authorizedPorschedealer.
Note
Airbagcomponents(e.g.steeringwheel,door
trim)maybedisassembledonlybyanauth-
orizedPorschedealer.
Whendisposingofausedairbagunit,oursafety
instructionsmustbefollowed.Theseinstructions
canbeobtainedatanyauthorizedPorsche
dealer.
{)Warninglight
Thecentraltriggeringunitmonitorstheoper-
ationalreadinessoftheairbagsystemandthe
warninglight.
Anymalfunctionsthatmayoccurwillbeindi-
catedbythewarninglightsintheinstrument
panelandon-boardcomputer.
t>Inthefollowingcasesyoushouldimme-
diatelyconsultanauthorizedPorsche
dealerinordertoassuretheairbagsys-
temisfunctioningproperly:
-
Illuminationoftheairbagwarninglightduring
travelorrepeatedilluminationlongerthan5
secondsaftertheignitioncircuitisturned
on.
-
Illuminationfailstolightupduringignitioncir-
cuitactivation.
Iftheairbagsonthepassenger'ssideare
switchedoffbythechild
restraint
system,or
ifaninstalledchildrestraintsystemisdetected
whentheignitionisswitchedon,thewarning
lightflashesfor60secondswhentheignition
is
on.
A.Danger!
Ifthelightdoesnotflash,theairbagsare
notdeactivatedandachildrestraintsys-
temmustnotbeinstalled.
t>
Havethefaultremediedimmediatelybyan
authorizedPorschedealer.
Airbagmaintenance
Inordertoensurelong-termfunctioning,theair-
bagsystemmustbeinspectedbyanauthorized
Porschedealerafter4,8and10yearsfromthe
dateofmanufactureshownonthesafetycom-
pliancesticker,andevery2yearsthereafter.
Importantinformation
IfyousellyourPorsche,notifythepurchaser
thatthevehicleisequippedwithairbags,and
referthemtothechapter,"AirbagSystems",in
theowner'smanual(safetyanddisposalrules).
Furtherinformationontheairbagsystemcanbe
foundonstickersatthesunvisors,aswellas
onallairbagcomponents.
Forspecialrecommendationsontheuseofchild
restraints,pleaserefertothechapteron"Child
RestraintSystems".
Controls,Instruments
45
Page 47 of 263
Loweringthesupplemental
safety
bars
afterdeployment
A
Warning!
Seriousinjuriestohandsandfingersmay
occurfromcrushingandpinchingatall
movingpartsandintheareaofthetrim
panelcut-out.
[>
Donotoperatethelockingleverbyhand.
[>Slowlyandverycarefullypushthesupplemen-
talsafetybarsbackin.
Pushthesupplementalsafetybarsbacktotheir
originalpositionsonlyiftheyweretriggeredwith
theconvertibletopopen.Iftheconvertibletopis
closedorthehardtopisfitted,havethiswork
performedbyanauthorizedPorschedealer.
1.TakeleverAofthewheelboltwrenchoutof
thetoolkit.
2.PresslockingleverBusingleverAinthe
directionindicatedbythearrowandmaintain
theforceonthelever.
3.Pushthesupplementalsafetybararoundhalf-
waydownandpulloutleverA.
4.Slowlypushdownthesupplementalsafety
baruntilitcanbefelttoengage.
5.CloseandengagecoverflapC.
6.Repeattheprocedureontheothersup-
plementalsafetybar.
Controls,Instruments
47
Page 52 of 263
ClutchPedal
Theclutchpedalmustbedepressedfully
beforethestarterwillengage.
/!\.Warning!
Riskofanaccident.
I>Alwayscheckthemovementoftheclutch
pedalbeforedrivingandmakesurethatitis
notobstructedbyafloormatoranyother
object.
I>Securethefloormattopreventitfromsliding
intopositionsthatcouldinterferewiththe
safeoperationofyourvehicle.
YourPorschedealerwillbegladtoofferyou
floormatsofthecorrectsizeincludingase-
curingpossibility.
Toavoiddamagetotheclutchandtrans-
mission:
I>Alwaysdepresstheclutchpedalfullywhen
changinggears.
I>Donotholdthecaronasteepgradewiththe
clutchpedalpartiallydepressed.
Shouldthefreetraveloftheclutchpedalsud-
denlybecomebigger,itcouldmeanamalfunc-
tionoftheclutch.SeeyourPorschedealerfor
correction.
52Controls,Instruments
ParkingBrake
Parkingbrakeforceismechanicallytransferred
totherearwheelsbymeansofcables.
I>Usetheparkingbrakeonlyafterthevehicle
hascometoafullstop.
Setting
theparkingbrake
I>Pulltheleverallthewayup(seearrow).
Withtheignitionon,theparkingbrakewarn-
inglightsintheinstrumentpanelandon-board
computerwillcomeoniftheleveriseven
slightlyraised.Afirmpullupwardisrequired
toproperlyengagetheparkingbrake.
Ifthebrakeisnotfullyset,thevehiclemay
rollwithoutcontrol.
I>Movetheselectorleverto"P"(Tiptronic)or
movethegearshiftlevertoreverseorfirst
gear(Manualtransmission).
I>Beforeexitingthevehicle,makesurethatthe
parkingbrakeisfullysetandthevehicleis
notmovingatall.
Releasingtheparkingbrake
I>Pulltheleverslightlyupasyoudepressthe
releasebuttonA,andthenpushtheleverall
thewaydown.
Page 53 of 263
.
@
ParkingbrakewarninglightUSA
Parkingbrakewarninglight
Canada
Thewarninglightswillgooutaftertheparking
brakeisfullyreleased.
Thewarninglightsarenotanindicatorthatthe
parkingbrakeisfullyset;itisonlyintendedto
beawarningtoreleasetheparkingbrakebe-
foredrivingthecar.
ACaution!
Apartiallyengagedbrakewilloverheatthe
rearbrakes,reducetheireffectivenessand
causeexcessivewear.
[>
Releasetheparkingbrakefully.
[>
Whenparkingyourcar,alwayssettheparking
brakebypullingallthewayuponthelever.
[>
Movetheselectorleverto"P"(Tiptronic)or
movethegearshiftlevertoreverseorfirst
gear(Manualtransmission).
[>
Onhillsalsoturnthefrontwheelstowardsthe
curb.
Brakes
[>Makeitahabittochecktheoperationofyour
brakesbeforedriving.
Keepinmindthatthebrakingdistanceincreases
veryrapidlyasthespeedincreases.At60mph
or100km/h,forexample,itisnottwicebut
fourtimeslongerthan30mphor50km/h.Tire
tractionisalsolesseffectivewhentheroadsare
wetorslippery.
[>Therefore,alwaysmaintainasafedistance
fromthecarinfrontofyou.
Note
Eventhoughthebrakediscsconsistofalloyed
greycastiron,theywillunavoidablystarttocor-
rodeifyourcarisparkedforanextended
period.Thebrakeswilltendto"rub"asthere-
sult.
Thenature,extentandeffectsofcorrosionde-
pendontheamountoftimethevehiclewas
parked,whethergranularorliquidroadsaltwas
spreadandwhethergrease-dissolvingagents
wereusedincarwashes.
Ifthebrakingcomfortisnoticeablyimpaired,we
recommendhavingthebrakesystemchecked
byexpertsatanauthorizedPorschedealer.
Brakesystemfunction
YourPorscheisequippedwithapowerassisted
hydraulicdualcircuitbrakesystemwithdisc
brakesatthefrontandrear.
Bothcircuitsfunctionindependently.Onebrake
circuitoperatesthefrontandtheotheroperates
therear.
Ifonebrakecircuithasfailed,theotherwillstill
operate.However,youwillnoticeanincreased
pedaltravelwhenyouapplythebrakes.
Failureofonebrakecircuitwillcausethestop-
pingdistancetoincrease.
A
Warning!
Riskofanaccident.
Intheunlikelyeventofhydraulicfailureof
onebrakecircuit:
[>
Pushthebrakepedaldownfirmlyandholdit
inthatposition.
Amechanicallinkageactivatesthesecondcir-
cuit,andyouwillbeabletobringthevehicle
toastop.
[>
Afterbringingyourvehicletoacomplete
stop,avoiddrivingthevehicleandinstead
haveittowedtothenearestauthorized
Porschedealerforrepair.
[>[>[>
Controls,Instruments
53
Page 56 of 263
ABSBrakeSystem
(AntilockBrakeSystem)
TheABSsystemrepresentsamajorcontribution
totheenhancementofactivesafetyinyourve-
hicle.
Thissystempreventsthewheelsfrom
lockinginapanicstoponalmostallroadsur-
faces.
56
Controls,Instruments
With
theABSsystem
inyour
vehicle,the
following
areasareenhanced:
Steering,vehicleremainssteerable
underall
brakingforceswhenABSisengaged.
Good
directionalcontrol,
noswervingcaused
bylockingofwheelsunderbrakingconditions.
Shorterstopping
distance,
stoppingdistances
areusuallyreducedbecausecontrolledbraking
ismaximized.
Preventionofwheellockup,nobrake-
inducedslidingandthusnolocalizedtirewear
fromemergencybraking.
ThecrucialadvantageoftheABSsystemovera
conventionalbrakesystemisintheareaof
maintainingdirectionalcontrolandmaneuvera-
bilityofthecarinemergencysituationsduring
normaldriving,includingpanicbrakinginturns.
A.Warning!
Theincreasedcontrolthatisprovided
shouldnotinduceyoutotakegreaterrisks
withyoursafety.Thelimitsdictatedbythe
lawsofphysicscannotbeovercome,even
withABS.
Theriskofaccidentsduetoinappropriate
speedcannotbereduced,evenbytheABS.
Thedriverbearstheresponsibilityforall
drivingmaneuvers.
[>
Adaptyourdrivingstyletotheprevailingroad
andweatherconditions.
[>Obeyalltrafficlaws.
OthervehiclesnotequippedwiththeABS
systemmaynotbeabletomaintaincon-
trol,especiallyonwetorpoorroadsur-
facesandthusmaybemorelikelytoim-
pactyoufrombehind.
[>
Tominimizethatrisk,useyourABSsystem
toincreaseyourabilitytomaneuvertoavoid
dangeroussituationsandnotmerelytotryto
stopintheshortestdistancepossible.
Page 57 of 263
OperationoftheABSsystem
Awheelspeedsensorismountedtoeachofthe
fourwheels.Ifwheellock-upofeitherofthe
frontwheelsortherearwheelsissensedduring
braking,thebrakepressureisadjustedautomat-
icallyuntilthewheelnolongerslips.Thebrake
pressureisregulatedforeachfrontwheelindi-
viduallyandforbothoftherearwheels
together.
Onaroadsurfacewhichisslipperyononlyone
side,therearwheelwhichisbrakingontheslip-
perysurfacedeterminesthebrakepressure
whichwillbeappliedequallytobothrearwheels.
Thisensuresthatdirectionalstabilityismain-
tained.However,ifbrakingforcesapproachthe
wheellock-uppointforallwheels(panicbraking)
theABSsystemwillintervenetoprovidearapid
rythmicbraking.
TheproperoperationofABSisperceivedbythe
driverasapulsatingbrakepedalinconjunction
withaudiblenoiseandperhapssomevibration.
I>Ifyouexperiencethesesensationswhiledriv-
ingoraroadsurfacewithquestionabletrac-
tion,reducevehiclespeedappropriateforthe
prevailingroadconditions.
Thefunctionalreadinessofallthemainelectrical
componentsoftheABSischeckedbyanelec-
tronicmonitoringsystembothbeforeandwhile
youdrive.
8
WarninglightUSA
@
WarninglightCanada
WhentheignitionisswitchedontheABSwarn-
inglightwilllightupwhilethesystemiselec-
tronicallyinterrogatedandgoesoutwhenthe
engineisstartedifthecheckisnotyetcom-
plete.
IftheABSwarninglampfailstogoout,thisindi-
catesthatABShasbeendeactivatedduetoa
fault.Ifthewarninglightsintheinstrumentpanel
andon-boardcomputerlightupwhileyouare
driving,thisindicatesthatafaulthasoccurred.
Inbothcases,normalbraking,asinvehicles
withoutABS,isstillretained.
TheABSsystemshould,however,beexamined
atanauthorizedPorschedealerimmediatelyto
preventtheoccurrenceoffurtherfaults.
I>IftheABSsystembecomesinoperative,take
yourvehicletoyourauthorizedPorsche
dealerimmediately.
/!\Warning!
ThecontrolunitoftheABSbrakesystemis
setforstandardtiresize.Ifnon-standard
tiresareinstalled,thecontrolunitmaymis-
interpretthespeedofthevehicle,because
ofthevariantdataitreceivesfromthesen-
sorsontheaxles.
I>Useonlytiremakesandtypestestedby
Porsche.
Controls,Instruments
57
Page 58 of 263
PorscheStabilityManagement
(PSM)
PSMisanactivecontrolsystemforstabilizing
thevehicleduringextremedrivingmaneuvers.
/!\.Warning!
Theincreasedcontrolthatisprovided
shouldnotinduceyoutotakegreaterrisks
withyoursafety.Thelimitsdictatedbythe
lawsofphysicscannotbeovercome,even
withPSM.
Theriskofaccidentsduetoinappropriate
speedcannotbereduced,evenbyPSM.
Thedriverbearstheresponsibilityforall
drivingmaneuvers.
[>Adaptyourdrivingstyletotheprevailingroad
andweatherconditions.
[>Obeyalltrafficlaws.
AdvantagesofPSM
-Superiortractionandlane-holdingabilityinall
drivingsituations-evenonroadsurfaces
withvaryingfriction.
-PSMactivelystabilizesthevehicleduringdy-
namicdrivingmanoeuvres(e.g.rapidsteering
movements,duringlanechangesoronalter-
natingcurves).
58Controls,Instruments
-Improvedbrakingstabilityincurvesandon
differentorvaryingroadsurfaces.
Readinessforoperation
ThePSMisengagedautomaticallyeverytime
youstarttheengine.
Function
Sensorsatthewheels,brakes,steeringsystem
andenginecontinuouslymeasure:
-Drivingspeed
-Directionoftravel
-Lateralacceleration
-Rateofturnaboutthevehicle'sverticalaxis
ThePSMusesthesevaluestodeterminethe
directionoftraveldesiredbythedriver.
PSMintervenesandcorrectsthecourseifthe
vehicle'sactualdirectiondeviatesfromthe
desiredcourse(steering-wheelposition).It
brakesindividualwheelsasneeded.Ifnecess-
ary,thePSMadditionallyinfluencestheengine
powerorthegear-changingcharacteristicofthe
Tiptronicinordertostabilizethevehicle.
TheeventsbelowinformthedriverofPSMcon-
troloperationsandwarnhimtoadapthisdriving
styletotheroadconditions:
-Theinformationlightintheinstrumentpanel
lightsup.
-Hydraulicnoisescanbeheard.
-Thevehicledeceleratesandsteering-wheel
forcesarealteredasthePSMcontrolsthe
brakes.
-Reducedenginepower.
-Thebrakepedalpulsatesanditspositionis
changedduringbraking.
However,itispossibleatanytimetoachieve
fullvehicledecelerationbyincreasingthefoot
pressureslightlyonthebrakepedal.
Page 59 of 263
Switching
offPSM
[>
Pressthe"PSMOFF"logooftherocker
switch.
PSMisswitchedoffafterabriefdelay.
WithPSMswitchedoff,thePSMOFFwarning
lightintheinstrumentpanelandtherocker
switchindicatorlightarelit.
Duringbraking,thevehicleisstabilizedeven
whenPSMisswitchedoff.
One-sidedspinningofthewheelsisprevented,
evenwithPSMswitchedoff.
PSMshouldalwaysbeswitchedonduring
"normal"driving.
However,itcanbeofadvantagetoswitchoff
PSMtemporarilyinexceptionalsituations:
-Onaloosesurfaceorindeepsnow
-When"rockingthevehiclefree"
-Whenusingsnowchains.
Tiptronicvehicles:WhenthePSMisswitched
offtheslipmonitoringfunctionoftheTiptronicis
alsodeactivated.
Switching
PSMbackon
[>
Presstheindicatorlightintherockerswitch.
PSMisswitchedonafterabriefdelay.
e
Infonnationlight
-ThePSMinformationlightintheinstrument
panellightsupforalampcheckwhentheig-
nitionisswitchedon.
-ThelightindicatesPSMinterventioneven
whenPSMisswitchedoff(brakeregulationin
theeventofone-sidedwheelspin).
4D
Warninglight
-Thewarninglightintheinstrumentpanel
lightsupincombinationwiththeindicatorlight
intherockerswitchforalampcheckwhen
theignitionisswitchedon.
-Incombinationwiththeindicatorlightinthe
rockerswitch,thelightindicatesthatPSMis
switchedoff.
-Thelightsintheinstrumentpanelandinthe
on-boardcomputerindicateadefect.
PSMisoutoforder.
Thefaultshouldberemediedimmediatelyat
anauthorizedPorschedealer.
Towing
Refertothechapter"Towing".
Handbraketests
Handbrake
tests
ontherollerteststandmust
beperformedonlywiththeignitionswitchedoff.
Refertothechapter"Four-wheeldrive".
Controls,Instruments
59
Page 60 of 263
911Carrera4,911Carrera4S
Four-WheelDrive
Withthefour-wheeldrive,theenginepoweris
variablydistributedtothefrontandrearwheels.
Powerdistributionandwheelspeedcompensa-
tionbetweenthefrontandrearaxlesisrealised
withaviscousmultiple-discclutch.
Distributionoftheenginepowerisdependent
uponthewheelspeeddifferencebetweenthe
twoaxles.
Theviscousmultiple-discclutchalwaysdelivers
sufficientdrivepowertothefrontwheels
(approx.5%to
40%)
toensureoptimumtraction
evenonapoorroadsurface.
IncombinationwiththePorscheStabilityMan-
agement(PSMJ,four-wheeldriveensuresopti-
mumhandlingandincreaseddrivingstability.
60Controls,Instruments
/!\.Warning!
Theincreasedcontrolthatisprovided
shouldnotinduceyoutotakegreaterrisks
withyoursafety.Thelimitsdictatedbythe
lawsofphysicscannotbeovercome,even
withfour-wheeldrive.
Theriskofaccidentsduetoinappropriate
speedcannotbereduced,evenbyfour-
wheeldrive.
Thedriverbearstheresponsibilityforall
drivingmaneuvers.
I>Adaptyourdrivingstyletotheprevailingroad
andweatherconditions.
I>Obeyalltrafficlaws.
Dynamometertestingprocedure
SomeU.S.statesandCanadianprovincescon-
ductemissionsinspection/maintenancetesting
involvingtheuseoftwo-wheeldynamometer.
Atwo-wheeleddynamometerisatreadmilltype
deviceuponwhichasingleaxleofthecar,the
drivingaxleofthevehicle,rotatestosimulate
vehicleoperationontheroadwhilethevehicle
remainsstationary.
Your911Carrera4hasafull-timefour-wheel
drivesystemwhichcannotbedisabled.Severe
damagetothepowertraincanresultiftestedon
atwo-wheeldynamometer.
/!\.Warning!
Toavoidseverepowertraindamageanda
possibleunexpectedmovementoftheve-
hicle.
I>Your911Carrera4vehiclemustneverbe
testedonatwo-wheeldynamometer.
I>Advisetheemissionstationofthiswarningbe-
foretestingthevehicle.
Powermeasurement
Powermeasurementsondynamometersarenot
approvedbyPorsche.
Page 61 of 263
Brake
tests
Brake
tests
mustbeperformedonlyonplate-
typeteststandsorrollerteststands.
Thefollowinglimitvaluesmustnotbeexceeded
onrollerteststands:
-Testingspeed4.7mph(7.5km/h)
-Testduration20seconds
Handbraketests
Handbraketestsontherollerteststandmust
beperformedonlywiththeignitionswitchedoff.
Balancingwheelsonthevehicle
Duringfinishbalancingofthewheels,thevehicle
mustbehoistedandthewheelsabletorotate
freely.
Towing
Refertothechapter"Towing".
Controls,Instruments
61