four wheel drive PORSCHE 911 CARRERA 2003 4.G Owners Manual

Beforedrivingoff12,13
Breakinhints14
Keys,theftprotection.16-19
Immobilizer,securitywheelbolts17
Doors,doorwindows20
Centrallocking21-23
Alarmsystem,infraredpassenger
compartmentmonitoring24,25
Powerwindows26,27
Mirrors,insideanddoor28,29
Rearwindowdefogger30
Sunvisors31
Seats32-37
Steeringwheeladjustment37
Safetybelts38-40
Childrestraintsystems41-43
Airbagsystem44,45
Rolloverprotectionsystem46,47
Parkingaids48,49
Retractablerearspoiler50,51
Fixedrearspoiler,frontspoiler,
sidememberparts51
Clutch,parkingbrake,brakes52-55
ABSbrakesystem56,57
PSMPorschestabilitymanagement58,59
Four-wheeldrive60,61
Dashboard,controlsandinstruments...62-109
Controls,Instruments
Ignition/starterswitch64,65
Startingandstoppingtheengine66,67
Instrumentpanel68-97
On-boardcomputer82-97
Emergencyflasherswitch99
Lightswitch,
automaticheadlightbeamadjustment100
Turnsignals/
headlightdimmer/flasherlever101
Windshieldwiper/washerlever,
rainsensor102,103
Automaticspeedcontrol104,105
Automaticairconditioner106-108
Centralandsidevents109
Ashtray11
°
Cigarettelighter,rearwiper111
Interiorlights112-114
Cupholder115
Storageinthepassengercompartment,
CDorcassetteholder116,117
Frontandrearlids118,119
Luggagecompartment120,121
Trunkentrapment122,123
Sportsexhaustsystem123
PCMPorschecommunicationmanagement.123
Caraudiooperation,tips124,125
Cartelephoneandaftermarkedalarms126
Controls,Instruments
11

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

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.

Wheelalignment,wheelbalancing

Alsoreferto"Four-Wheeldrive".
Asaprecaution,havewheelswithsummertires
balancedinthespring,andthosewithmudand
snowtiresbeforewinter.
Unbalancedwheelsmayaffectcarhandlingand
tirelife.
Onlythespecifiedweightsmaybeusedfor
wheelbalancing.
Self-adhesiveweightsmustnotcomeintocon-
tactwithcleaningagents,sincetheycoulddrop
off.
Awheelshouldalwaysbebalancedafteratire
repair.
Uneventreadwearindicateswheelimbalance.In
thisevent,thevehicleshouldbecheckedatan
authorizedPorschedealer.
/!\.Warning!
If,duringajourney,unevenrunningorvi-
brationsoccurthatcouldbecausedby
damagetotiresorthecar,thespeedmust
bereducedimmediately,butwithoutbrak-
ingsharply.
Ifyoucontinueyourtripwithouthavingthe
causeofthefaultremedied,youmightlose
controlofyourvehiclewhichcouldcause
severepersonalinjury.
I>Stopthevehicleandcheckthetires.
202PracticalTips,EmergencyService
I>Ifnocauseforthefaultcanbefound,drive
carefullytothenearestauthorizedPorsche
dealer.

Removingandstoringtires

I>Afterchanging,adjusttirepressureand
torquewheelboltsdiagonallyto94ftlb
(130

Nm).
See"Changingwheels".

Tiresmustalwaysremainonthesameside
ofthevehicle.

Whenwheelsareremoved,thedirectionofrota-
tionandpositionofeachwheelshouldbe
marked.
Example
FR(frontright),FL,RRandRL.
Wheelsmustalwaysbefittedinaccordancewith
theirmarking.
Thepreceptionthattiredurabilityandperfor-
manceareimmunetotheeffectsofstorageand
ageisunfounded.
Chemicaladditives,whichmaketherubberelastic,
losetheireffectivenessinthecourseoftimeand
therubberbecomesbrittleandcracks.

Therefore,thetires,especiallythespare
tire,shouldbeinspectedfromtimetotime.
Note

Undernocircumstancesshouldtiresolderthan
6yearsbeusedonyourPorsche.
Theageofthetirecanbeobtainedfromthe
"DOT"codenumber.If,forexample,thelast
threenumbersread1202,thenthetirewaspro-
ducedinthe12thweekof2002.

Storetiresinacoolanddryplace.
Snowtires

Forabettergriponsnowandice,useradialM+S
tireswithstuds.
CheckwithyourlocalMotorVehicleBureaufor
possiblerestricTIons.

/!\.Warning!
Riskoflossofcontrolanddamagetothe
vehicleaswellasseverepersonalinjury.
Thestandardtiresprofileandrubbermix-
tureareoptimizedforwetanddrydriving
conditions,andmaynotprovefavorablefor
snowconditions.

I>ThereforeinstallM+Stiresbeforedrivingin
suchconditions.

Beforemountingsnowtires,consultwith
yourPorschedealer.Hehasthetechnical
informationnecessarytoadviseyouon
wheelandtirecompatibility.
Snowtiresshouldhavethesameloadcapacityas
originalequipmenttiresandshouldbemountedon
allfourwheels.
Snowtireswithstudsshouldberunatmoderate
speedswhennewinordertogivethestudstime
tosettle.
A
Warning!
Tireswithbadlyworntreadsandstudsare
verydangerousandcouldcauseaccidents
resultinginseverepersonalinjuries.
[>
Makesuretheyarereplacedimmediately.
Donotdriveavehicleequippedwithsnowtires
atprolongedhighspeed.
Snowtiresdonothavethesamedegreeoftrac-
tionondry,wetorsnowfreeroadsasanormal
tire.
Furthermore,snowtireswearrapidlyunder
theseconditions.
Snowtiresdonotfulfilltheirpurposeifthetread
depthislessthan
5/32
in(4mm).
Complywithallstateandlocallaws
governingsnowtireandtreaddepth
requirements.
Snowchains
ACaution!
Riskofdamagetobody,axleorbrake
components.
[>
Fitsnowchainsonlytotherearwheels,and
onlywiththetire/rimcombinationlistedinthe
TechnicalData.
Toensureadequateclearancebetweenchain
andbody,Porscherecommendsonlytheuse
offine-linkchainssuchasthoseapprovedby
Porsche.
[>
Followinstructionsissuedbythesupplierof
thechains.
Differentstatesandcountrieshavevaryingstatu-
toryrequirementsregardingmaximumspeed.
Checkwithlocalauthoritiesforpossiblerestric-
tions.
[>
Removechainsassoonastheroadsarefree
oficeandsnow.
Tiredesignations
Duetonewspeedandloadratingsforradial
tires,newdesignationshavecomeintoforcefor
snowtiresforyourPorsche.
ThedesignationtobeusedforZRtiresise.g.,

255/40
ZR17(Z
=
codeletterforradialtires
forspeedsabove150mph(240km/h).
PracticalTips,EmergencyService
203

~Neverusethetowingeyetotowthisorany
othervehicle.
Certainstatestatutesandlocalordinancespro-
hibittowingwithachain,ropeorevenatow
bar.
Inaddition,damagetoyourvehiclemayresult
fromimproperprocedures.
ConsultyourauthorizedPorschedealerforde-
tails.
Vehicletowing
Flatbedtowingisthepreferredtypeoftowing
tobeusedonPorschevehicles.
Undercertaincircumstances,wheelliftsmaybe
usedwhenthevehiclewillnotroll.
Thevehicle
must
betowedwithallfour
wheelsofftheground,otherwisedamageto
thevehiclemayresult.
Towingeye
Thetowingeyeiscontainedinthetoolkit.
ACaution!
Riskofdamagetothevehicle.
~Usethetowingeyeonlyforanemergencyto
removethevehicleofftheroad.Thetowing
eyeistobeusedonlytopullthevehicleonto
theflatbed,tractorortowingaparatusifthe
vehiclewillrollfreely.Undernocircumstances
isthevehicletobesecuredusingthetowing
eye.
238PracticalTips,EmergencyService
Towing
Frontmounting
1.Carefullyremovetheplasticcapbesidethe
licenseplatewithascrewdriver.
2.Screwthetowingeyeintothehole.
Rearmounting
1.Removelicenseplate.
2.Carefullyremovetheplasticcapbetweenthe
bumperswithascrewdriver.
3.Screwthetowingeyeintothehole.

D
Dashboard62,63
Defrostingwindows30,106-109
Diagnosticsocket15,213
Diagrams255-258
Dimensions254
Door20
-Guard233
-Handles20
-Locks20,187
-Windows20,26,27,140,189
Doormirror28,29
-Heating30
Drivinghints12-14
Drivingperformance245
Dynamometertesting59,61
260Index
E
Electricalsystem212-214
Emergencyflasher99
Emergencyprogram,Tiptronic134
Emergencyservice196-239
Emergencystarting
withjumpercables220,221
Emergencyoperation
-Centrallocking22
-Convertibletop140-149
-Glassslidingroof(Targa)164,165
-Lids214
-Lifting/slidingroof138,139
-Tankflap176
Emissioncontrolsystem7,81,179,180
Enginecompartment
-Blower67,77
-Lid118,119
-Light233
Engine
-Checkingoillevel86,87,171
-Dipstick171
-Exhaust8
-Number242
-Oilconsumption14,170
-Oillevel171
-Oillevelgauge86,87
-Oilpressuregauge80
-OilpressurewarningIight80
-Oils17°-173,250
-Starting64-67
-Speeds14,245
-Switchingoff64-67
F
Foglights100,229,231
Footbrake53-55
Footwelilights114
Four-wheeldrive60,61
Fronthood118,119
Frontspoiler51
Fuel4,78,176-181,250
-Containers8
-Economy175
-Evaporationcontrol181
-Levelwarninglight78
-Levelgauge78
-Recommendation177,178
-Tank176,177,250
Fuses213
G
Garagelift205
Gearchanging128-134
Glassslidingroof161
-Emergencyoperation164,165
Glovecompartment116
Gong
16,65,84,98