2003 PORSCHE 911 CARRERA ESP

ParkingAids
Parkingassistant(ParkAssistentl
Whenthedriverbacksup,theparkingassistant
systemindicatesthedistancebetweenthecar
andanobstaclebehindit,bymeansofsignal
tones.
/!\Warning!
Risk
of
accident.
Despiteuseoftheparkingassistantsys-
tem,thedriverisstillresponsiblefortaking
duecareandassessingobstacleswhen
backingup.
I>Makesurethatnopersons,animalsorob-
staclesarewithinthemanoeuvringarea.
Theparkingassistantsystemisactivatedautomat-
icallywhenreversegearisselectedandtheigni-
tionison.
Note
Beawarethattheparkingassistantsystemis
notswitchedonifthecarrollsbackwardwithout
reversegearbeingengaged.
48Controls,Instruments
Ultrasoundsensors
Sensors
Fourultrasoundsensorsintherearbumper
measurethedistancetotheclosestobstacle.
-Rangemiddlesensorsaround50in./150cm
-Rangeoutersensorsaround24in./50cm
Obstaclescannotbedetectedinthe"blind"sen-
sorarea(e.g.neartheground).
Note
Thesensorsmustalwaysbekeptfreeofdust,
iceandsnowinordertoensurethattheyare
fullyfunctional.
CO')
0
CO')
t'I/!\Caution!
Toavoiddamagingthesensors:
I>Maintainsufficientdistancewhencleaningwith
steam-jetunits.
Signaltones/function
Whenreversegearisselected,theparkingas-
sistantconfirmsthatitisswitchedonbyissuing
ashortsignaltone.
Adetectedobstacleissignalledbyanintermit-
tenttone.Theintervalsdecreaseastheob-
stacleisapproached.
Acontinuoustonesoundswhenthedistance
becomeslessthanonefoot.Thiscontinuous
tonecanstopiftheobstacleisapproached
closerthanonefoot.
Theradiovolumeshouldnotbesoloudas
todrownoutthesignaltones.

RetractableRearSpoiler
Therearspoilerreducesairresistanceand,par-
ticularlyathighspeeds,reducesrearaxlelift.
Automaticcontrol
Therearspoilerautomaticallyextendsatap-
proximately75mph/120km/handretractsat
approximately37mph/60km/h.
50Controls,Instruments
C1
Warninglight
Thewarninglightintheinstrumentpanellights
foralampcheckwhenignitionisswitchedon.
Thewarninglightsintheinstrumentpaneland
on-boardcomputergooniftherearspoiler
doesnotextendatmorethan75mph/120
km/horiftheendpositionisnotreached.
Iftheautomaticcontrolfails:
I>Stopthecaratasafeplaceandextendthe
rearspoilermanuallybypressingthespoiler
rockerswitchA.
A.Danger!
Riskofanaccident.
Thespoileraffectsmovementofairaround
thevehicleandisusedtomaintainaerody-
namicstabilityasvehiclespeedsincrease.
Ifthespoilerdoesnotextendautomatically
duetomechanicalmalfunction,drivingsta-
bilitywillbeadverselyaffectedbyin-
creasedrearaxlelift,whichcouldleadto
lossofcontrol.
I>Adaptyourdrivingstyleandreducespeedto
thechangedaerodynamicconditions.
I>Havethefaultremediedatanauthorized
Porschedealer.
I>Donotexceedthepostedlegalspeedlimit.
Risk
ofan
accidentandlossofcontrol.
I>Donotoperatethespoilerrockerswitchma-
nuallywhiledriving.

Manual
control

Whentheignitionison,thespoilercanbeex-
tendedandretractedmanuallyusingtherocker
switchAintheareaofthedriver'sfootwell.
A.Warning!
Seriousinjuriesmayoccurfromcrushing
andpinchingatallmovingpartsinthearea
oftheretractablespoiler.
I>Ensurethatnoonecanbeinjuredandnoob-
jectscanbejammedbytheextensionorre-
tractionoftherearspoiler.
Extension
I>PressupperhalfofrockerswitchAbriefly.
Thespoilerextendstoitsfinalposition.
Retraction
I>PressandholdlowerhalfofrockerswitchA
untiltherearspoilerhasreacheditsfinalposi-
tion.
Fixedrearspoiler
A.Caution!
Riskofdamagetorearspoiler.
I>Pleaseconsulttheoperatorbeforeusingauto-
maticcarwashes.
I>Donotpushthevehiclebythespoiler.
Frontspoiler,
sidememberpanels
A.Caution!
Riskofdamageduetoreducedground
clearance.Thecarmayhavegroundcon-
tact.
I>Driveslowlyandcarefullyonsteepuphilland
downhillslopes(e.g.multi-storeycarparks).
I>Avoidsteepramps.
Controls,Instruments
51

.
@
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

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.

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.

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