2003 PORSCHE 911 CARRERA engine

Closingwindows

A25)
Closingwiththerockerswitch
'-=7inthecenterconsole
I>Pressrockerswitchuntilthewindowhas
reachedthedesiredposition.
I>One-touchoperation(doorwindowsonly):
Pressrockerswitchbriefly.
Windowmovestoitsfinalposition.
Pressagaintostopthewindowinthedesired
position.
Comfortfunctionwhenlockingthevehicle
atthedoorlock
I>Coupe,TargaandCabrioletwithhardtop:
Holdcarkeyindoorlockinthelockingdirec-
tionuntilthewindowshavereachedthe
desiredposition.
Cabrioletwithouthardtop:
Thewindowscanonlybeclosedwiththecon-
vertibletopclosed.
Anti-crushingprotection
Ifasidewindowisblockedduringclosing,itwill
stopandopenagainbyaboutaninch.
A
Warning!
Risk
of
severepersonalinjuries.

Ifthe
rockerswitchispressedagainwithin
10seconds
ofthe
windowbeingblocked,

the
windowwillclosewithitsfullclosing
force.Anti-crushingprotectionisdisabled.
I>Oncetheanti-crushingprotectionactstostop
thewindowandopensitslightly,donotpress
therockerswitchagainwithin10seconds
withoutcheckingtomakesurethatnothingis
blockingthepathofthewindow.
Thewindowwillclosewithfullclosingforce.
One-touchoperationisdisabledfor10seconds
afterblockageofasidewindow.
Automaticwindowlowering
Seethechapterson"Doors"and"Convertible
top".
Thestandbyfunctionofthepower
windowsswitchesoffaftertwohours
Whenthecarisunlocked,thepowerwindows
cannolongerbeoperatedaftertwohours(to
savethecarbattery).
I>Switchontheignitionorstarttheengineto
reactivatethepowerwindows.

Storing
endpositionofthewindows
Ifthebatteryisdisconnectedandreconnected,
thewindowswillnotberaisedautomatically
whenthedoorisclosed.
1.Closethewindowswiththerockerswitch
once.
2.Pressfronthalfofrockerswitchagainto
storetheendpositionofthewindowsinthe
controlunit.
Controls,Instruments
27

RolloverProtectionSystem
TheRolloverProtectionSystemonthe
Cabrioletconsistsoftwosupplementalsafety
barsthattogetherwiththefrontwindshield
framehelptocreateoccupantsurvivalspacein
caseofrollover.Becauseoftheextremeand
unpredictableforceswhichcanbeencountered
inarollover,itisnotpossibletoguaranteethat
occupantswillbeprotectedfromallcontactwith
exteriorobjectsortheground.However,the
RolloverProtectionSystemisdesignedtomain-
taintheoccupantsurvivalspace.
TheRolloverProtectionSystemisactivated
automaticallyintheeventofanaccidentorex-
tremedrivingsituation.
Theprotectivedevicesarelocatedbehindeach
rearseatandrapidlydeploywithinafractionof
asecond.
Theycandeployunder:
-Extremetiltingofthevehicle.
-Lossofgroundcontact(e.g.Goingoverthe
crestofahillathighspeed).
46Controls,Instruments
/!\Danger!
Riskofdeathorseriousinjury.
I>Donotblockareaofsupplementalsafety
barswithobjects.
Intheeventofadeploymentevent,suchob-
jectscouldpotentiallypreventsuchdeploy-
mentfromoccuring,orsuchobjectscould
impactthecaroccupantsathighspeed.
I>Donottamperwithorworkonwiringandor
componentsofRolloverProtectionSystem.
I>Allworkregardingthissystemmustbecar-
riedoutbyyourauthorizedPorschedealer.
I>Checkfunctionsandperiodicserviceintervals
accordingtomaintenanceschedule(seeyour
authorizedPorschedealer).
Toavoiddamagetotheconvertibletop:
I>Ifthesupplementalsafetybarsareextended
foranyreason,donotopenorcloseconvert-
ibletop.
@
Warninglight
Thewarninglightilluminateswhenignitionis
switchedonandgoesoffwhenengineisrun-
ning.
Shouldthewarninglightsintheinstrumentpanel
andon-boardcomputerilluminatewiththeen-
ginerunningorwhiledriving,itmeansthata
faulthasbeendetectedinthesystem.Theoper-
ationofthesystemmaybecompromised.
SeeyourauthorizedPorschedealerimmediately
andhavethefaultremedied.

Brake
booster
Thebrakeboosterassistsbraking
only

whentheengineisrunning.

Whenthecarismovingwhiletheengineisnot
running,orifthebrakeboosterisdefective,
morepressureonthebrakepedalisrequiredto
bringthecartoastop.
Moistureorroadsaltonbrakesaffectsbraking.
Whenthevehicleisdrivenonsaltedroadsfor
extendedperiods,thebrakesshouldbewashed
downthoroughlyaboutevery2weeks.Anauto-
maticcarwashfacilitycannotdothisjob
properly.
Brakeswilldryafterafewcautiousbrakeappli-
cations.

A.Warning!
Drivingthroughwatermayreducethetrac-
tion.
Moistureonbrakesfromroadwater,car
wash,orcoatingofroadsaltmayaffect
brakingefficiency.
t>Cautiously
applybrakes
to
testbrakesafter
beingexposed.
Brakewear
Yourcarhasexcellentbrakes,buttheyarestill
subjecttowear.Therateatwhichtheywear
dependsonhowthebrakesareused.

t>
Havethebrakesysteminspectedattheinter-
valsrecommendedinyourMaintenance
Booklet.

8
@
WarninglightUSA
WarninglightCanada

Ifthelightsintheinstrumentpanelandon-board
computerstayonwhentheengineisrunningor
comeonwhiledriving,thebrakepadsareworn,
excessively.
t>Donotcontinuetooperatethevehicle.
HaveyourauthorizedPorschedealerinspect
orreplacethebrakepads.
Brakepads
Wearonthebrakepadsandbrakediscs
dependstoagreatextentonthedrivingstyle
andtheconditionsofuseandthereforecannot
beexpressedinactualmilesontheroad.
Thehigh-performancebrakesystemisdesigned
foroptimalbrakingeffectatallspeedsandtem-
peratures.
Certainspeeds,brakingforcesandambient
conditions(suchastemperatureandhumidity)
thereforemightcausethebrakestosqueal.

Newbrakepadsorlinings

Newbrakepadshavetobe"brokenin",and
thereforeonlyattainoptimalfrictionwhenthe
carhascoveredseveralhundredmilesorkm.
Theslightlyreducedbrakingabilitymustbe
compensatedforbypressingthebrakepedal
harder.Thisalsoapplieswheneverthebrake
padsandbrakediscsarereplaced.
Controls,Instruments
55

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

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.

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.

Ignition/StarterSwitchwith
anti-theftSteeringLock
Foryoursafety,
fastensafetybelts.

Seealsothechapteron"Immobilizer".
64Controls,Instruments
Beforestartingtheengine
I>Applythehandbrake.

I>Manualtransmission:

Movethegearshiftleverintoneutral.
Theclutch
pedalmustbedepressedfully
beforethestarterwillengage.
I>Tiptronic:

Movetheselectorleverto"P"or"N".
Switchposition0
Theignitionkeycanbewithdrawninthisposi-
tiononly.
Tiptronicmodels
Theignitionkeycanbewithdrawnonlywhenthe
selectorleverisinthe"P"position.
Thesteeringislockedwhenthekeyiswith-
drawn.

I>
Engagethesteeringlockbymovingthesteer-
ingwheeltotheleftorright.
Turnthesteeringwheeltothelockingposition
beforeyouswitchofftheenginesothatyou
don'thavetoexertyourselfwhenlockingor
unlockingthesteering.

Switchposition
1
Ignitionison.
Allelectricalequipmentcanbeswitchedon.
Thewarninglightslightupforalampcheck.
Pleasenotethedescriptionoftheindividual
warninglights.
I>Whenturningthekeytoposition1,relievethe
steeringlockwithaslightsteeringmovement.
Note
Toconservebatterypoweratlowrpm(traffic
jams,towndrivingetc,),switchoffallelectrical
consumerswhicharenotneededatthatmo-
ment.

Switchposition2
Startingtheengine
I>
Turnthekeyfromposition1toposition
2.
Theclutchpedalmustbedepressedfully
beforethestarterwillengage.

Thefirstoperationofthestarterisendedauto-
maticallywhentheenginestarts.
Iftheenginedoesnotstart,subsequentstarter
operationswillnotbeendedautomatically.
Iftheenginedoesnotstartatthefirsttimeor
stallsatanytime,thekeymustbereturnedto
positionO.
Whentheengineisrunning,thewarninglights
shouldgooff.Ifalightdoesnotgooff,take
appropriateactionasindicatedinthismanual.

Switchingengineoff
I>
Turntheignitionkeyfromposition1toposi-
tion
O.
A
Warning!
Riskofanaccident.
Thesteeringwheelwilllockandwillcause
lossofsteering.
I>
Neverremovekeyfromtheignitionlockor
turnthekeyoffwhilethevehicleismoving.

I>To
avoidbatteryrun-down,alwaysremovethe
ignitionkeyfromtheignitionlock.
Seealsothechapteron"Battery".

I>
Turnthesteeringwheeluntilthesteeringlock
isengaged.

Note
On
vehicleswithTiptronicitisonlypossibleto
removetheignitionkeyiftheselectorleverisin
position
"P".
Gong

Ifyouleavethekeyintheignition/steeringlock,
agongwillsoundwhenthedriver'sdooris
opened.Thisisaremindertoremovethekey.
Controls,Instruments
65