2003 PORSCHE 911 CARRERA wheel

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

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.

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

Operation,Instruments
1Sidevent
2Ignition/starterswitchwithsteeringlock
3Spaceforhands-freemicrophonefor
telephone
4Turnsignals/
headlightdimmer/flasherlever
5Instrumentpanel
6Horn
7Windshieldwiper/washerlever
8Emergencyflasherswitch
9Rockerswitchesfor
PorscheStabilityManagement(PSMJ,
footwelllight,
rearwindowwiper
10Readinessdisplayforalarmsystem
11Centralvent
12Cupholder
13Controlpanelforheating,ventilation,
airconditioning
14Rockerswitchesfor
centrallocking,
rearwindowanddoormirrorheating,
rearwindowwiper,
convertibletopoperation
15Speaker
16Lightswitch
17ToggleswitchesforTiptronic
18Operatingleverforon-boardcomputer
19Lockingleverforsteering-wheeladjustment
20Operatingleverforautomaticspeedcontrol
21Wipeintervalcontrol!
rain-sensorsensitivitycontrol
22Rockerswitchesforseatheating
23Rockerswitchforglassslidingroof(Targa)
24Rockerswitchforrollerblind(Targa)
25Radio
26Cigarettelighter
27Glovecompartment
28Interiortemperaturesensor
Controls,Instruments
63

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

Stoppingengine

I>TurnkeybacktopositionO.
I>Donotstopengineimmediatelyafterhardor
extendeddriving.
Keepenginerunningatincreasedidlefor
abouttwominutestopreventexcessiveheat
build-upbeforeturningoffengine.
I>Toavoidbatteryrun-down,alwaysremovethe
ignitionkeyfromtheignitionlock.
I>Makesurethatwhenyouleavethecar,even
briefly,youhavewithdrawntheignitionkey.
I>Engagethesteeringlockbymovingthesteer-
ingwheeltotheleftorright.
Turnthesteeringwheeltothelockingposition
beforeyouswitchofftheenginesothatyou
don'thavetoexertyourselfwhenlockingor
unlockingthesteering.
/?\.Warning!
Hotenginecompartmentcomponentscan
burnskinoncontact.
I>Beforeworkingonanypartintheenginecom-
partment,turntheengineoffandletitcool
downsufficiently.

Engine-compartmentblower,
radiator
fan
Theradiatorandradiatorfansareinthefrontof
thecar.
Theengine-compartmentblowerismountedon
theenginecompartmentlid.
/?\.Warning!
Riskofinjury.
Aftertheengineisswitchedoff,theengine-
compartmentandcoolanttemperaturesare
monitoredforapprox.20minutes.
Duringthisperiod,anddependingontem-
perature,theengine-compartmentblower
andradiatorfansmaycontinuetorunor
starttorun.
I>Carryoutworkintheseareasonlywiththe
engineoffandexerciseextremecaution.

Automaticgaragedoor

TheignitionsysteminyourPorschemayinter-
ferewithyourelectronicallyoperatedgarage
door.
I>Tocheckthis,driveyourPorscheclosetothe
garagedoor.Makesurenottointerferewith
theoperatingrangeofthedoor.
I>Runtheengineatdifferentspeeds.
Ifthegaragedooropensorcloseswithoutyou
operatingthegaragedoorunitinyourcar,con-
tactthedealerwhoinstalledtheautomaticgar-
agedoortohavethefrequencyand/orcoding
ofthegaragedoorsignalchangedormodified.
Controls,Instruments
67