2004 PORSCHE 911 GT3 sensor

Automaticdoorlocking

Your authorized Porschedealercanprogram di-
verse typesofautomatic doorlocking inthe con-
trol unit ofthe central locking system:

Type 1

Doors lockautomatically whentheignition is
switched on.

Type
2

Doors lockautomatically whenaspeed of
3 -6 mph (5-10 km/h) isexceeded.

Type
3

Doors lockautomatically whentheignition is
switched on.Ifdoors areopened withtheengine
running, theylockagain automatically whena
speed of3-6 mph (5-10 km/h) isexceeded.

Type 4

The doors donot lock automatically.

Note

Automatically lockeddoorscanbeunlocked with
the central locking buttonoropened bypulling on
the inside doorhandle twice.
Controls, Instruments
j!\warning!
In an emergency situationwhereyouneed to
exit thecarthrough anautomatically locked
door, remember thefollowing procedure to
open thedoor.

I>
Unlock thedoors bypressing thecentral lock-
ing button
or

I>
pull theinside doorhandle
twice
toopen the
door.

Fault indication

A double
hornsignal
duringlocking indicates a
defect inthe central locking oralarm system.
Have thedefect remedied atan authorized
Porsche dealer.

Overload protection

If the central locking system isoperated more
than tentimes within aminute, furtheroperation is
blocked for30seconds.
A
-
Light-emitting diodeforalarm system

B -
Sensor module forinfrared passenger compartment
monitoring system

Alarm System,
Infrared Passenger Compartment
Monitoring

The alarm system andinfrared passenger com-
partment monitoring systemareswitched on
when thedoors arelocked withthekey orremote
control.

I>
Please observe thechapter "CENTRAL LOCK-
ING" onPage 22.

Operation ofthe ABS system
A wheel speed sensor ismounted toeach ofthe
four wheels. Ifwheel lock-up ofeither ofthe front
wheels orthe rear wheels issensed duringbrak-
ing, thebrake pressure isadjusted automatically
until thewheel nolonger slips.Thebrake pressure
is regulated foreach frontwheel individually and
for both ofthe rear wheels together.
On aroad surface whichisslippery ononly one
side, therear wheel whichisbraking onthe slip-
pery surface determines thebrake pressure which
will beapplied equallytoboth rearwheels. Thisen-
sures thatdirectional stabilityismaintained. How-
ever, ifbraking forcesapproach thewheel lock-up
point forallwheels (panicbraking) theABS system
will intervene toprovide arapid rythmic braking.
The proper operation ofABS isperceived bythe
driver asapulsating brakepedalinconjunction
with audible noiseandperhaps somevibration.

I>
Ifyou experience thesesensations whiledriv-
ing oraroad surface withquestionable trac-
tion, reduce vehicle speedappropriate forthe
prevailing roadconditions.
The functional readinessofall the main electrical
components ofthe ABS ischecked byan
electronic monitoring systembothbefore and
while youdrive. •
Warning lightUSA
• Warning lightCanada
When theignition isswitched onthe ABS warning
light willlight upwhile thesystem iselectronically
interrogated andgoes outwhen theengine is
started ifthe check isnot yetcomplete.
If the ABS warning lampfailstogo out, thisindi-
cates thatABS hasbeen deactivated duetoa
fault. Ifthe warning lightsinthe instrument panel
and on-board computer lightupwhile youaredriv-
ing, this indicates thatafault hasoccurred. Inboth
cases, normal braking, asinvehicles withoutABS,
is still retained.
The ABS system should,however, beexamined at
an authorized Porschedealerimmediately topre-
vent theoccurrence offurther faults.

I>
Ifthe ABS system becomes inoperative, take
your vehicle toyour authorized Porschedealer
immediately.
A

Warning!
The control unitofthe ABS brake system is
set forstandard tiresize. Ifnon-standard
tires areinstalled, thecontrol unitmay mis-
interpret thespeed ofthe vehicle, because of
the variant dataitreceives fromthesensors
on the axles.

I>
Use only tiremakes andtypes tested by
Porsche.
Controls,Instruments

Operation, Instruments

1 Side vent
2 Ignition/starter switchwithsteering lock
3 Space forhands-free microphone for
telephone
4 Turn signals/
headlight dimmer/flasher lever
5 Instrument panel
6 Horn
7 Windshield wiper/washer lever
8 Emergency flasherswitch
9 Rocker switches forfootwelilight
10 Readiness displayforalarm system
11 Central vent
12 Cupholder
13 Control panelforheating, ventilation,
air conditioning
14 Rocker switches for
central locking,
rear window anddoor mirror heating

48
Controls, Instruments 15
Speaker
16 Light switch
17 Operating leverforon-board computer
18 Locking leverforsteering-wheel adjustment
19 Operating leverforautomatic speedcontrol
20 Wipe interval control
21 Radio
22 Cigarette lighter
23 Glove compartment
24 Interior temperature sensor

StartingProcedures

c>
Please observe thechapter "IMMOBILIZER" on
Page 19.

A
Warning!
Serious injurymayresult ifyou areinvolved
in acollision withouthavingfastened the
safety belts.

c>
Fasten safetybeltsbefore driving away.

Before starting theengine

c>
Apply thehandbrake.

c>
Move thegearshift leverintoneutral.

The clutch pedalmustbedepressed fully
before thestarter willengage.

Temperature sensorsonthe engine automatically
provide thecorrect fuel/air mixture required for
starting.
Therefore, itis
not necessary todepress the
accelerator pedal
whilestarting acold ora
warm engine.

c>
Assoon asthe engine starts,release theigni-
tion key.

52
Controls, Instruments The
first operation ofthe starter isended automat-
ically when theengine starts.
If the engine doesnotstart, subsequent starter
operations willnotbeended automatically.
If the engine failstostart after 10or15 seconds
of cranking:

c>
Wait about 10seconds beforeengaging the
starter again.

c>
Donot letthe engine idletowarm up.

c>
When starting theengine, beready todrive
immediately.
Drive vehicle atmoderate speedsandavoid
engine speeds above4,200 rpmduring the
first 5minutes.
A

Danger!
Engine exhaust fumeshavemany compo-
nents which youcan smell. Theyalsocontain
carbon monoxide (CO),which isacolorless
and odorless gas.
Carbon monoxide cancause unconscious-
ness andeven death ifinhaled.

c>
Never startorlet the engine runinan en-
closed, unventilated area.
It is not recommended tosit inyour carforpro-
longed periods withtheengine onand thecar
not moving.

An unattended vehiclewitharunning engine
is potentially hazardous.
If warning lightsshould comeontoindicate
improper operation, theywould gounno-
ticed.

c>
Never leavetheengine idlingunattended.

Danger offire.

c>
Donot park oroperate thevehicle inareas
where thehotexhaust systemmaycome in
contact withdrygrass, brush,fuelspill oroth-
er flammable material.

c>
Ifyour carcatches onfire forany reason, call
the fire department.
Do not endanger yourlifebyattempting toput
out the fire.

Instrument PanelUSAModels

Also refer tothe corresponding chaptersin
the Owner's Manual.

1 Voltmeter
2 Speedometer withanalogue display
3 Speedometer withdigital display
4 Automatic speedcontrol indicator light
5 Tachometer
6 Turn signal indicator light,left
7 High beam indicator light
8 On-board computer
9 Turn signal indicator light,right
10 Light sensor forinstrument illumination
11 Clock
12 Cooling system
Temperature gauge,warning light
13 Fuel
Level gauge, warning light
14 Engine oilpressure gauge
Controls, Instruments
Warning
lightslindicator lights

A Washer fluidlevel warning light
B Check engine warning light
CABS warning light
D Brake fluidlevel,
Brake distribution warninglight
E Parking brakewarning light
F Brake padwear warning light
G Engine oilpressure warninglight
H Battery warning light
I Safety beltwarning light

J
Airbag warning light
K Luggage compartment lid/
engine compartment lidwarning light
When
theignition isswitched on,the warning
lights lightupfor alamp check.
Note

Warnings thathave been given arestored inthe
appropriate controlunitmemory andcanberead
out atan authorized Porschedealer.
This information canhelp towarn youabout situa-
tions which maybehazardous toyou oryour car.

Instrument PanelCanada Models

Also refer tothe corresponding chaptersin
the Owner's Manual.

1 Voltmeter
2 Speedometer withanalogue display
3 Speedometer withdigital display
4 Automatic speedcontrol indicator light
5 Tachometer
6 Turn signal indicator light,left
7 High beam indicator light
8 On-board computer
9 Turn signal indicator light,right
10 Light sensor forinstrument illumination
11 Clock
12 Cooling system
Temperature gauge,warning light
13 Fuel
Level gauge, warning light
14 Engine oilpressure gauge
Controls, Instruments
Warning
Iights/indicator lights

A Washer fluidlevel warning light
B Check engine warning light
CABS warning light

o
Brake fluidlevel,
Brake distribution warninglight
E Parking brakewarning light
F Brake padwear warning light
G Engine oilpressure warninglight
H Battery warning light
I Safety beltwarning light

J
Airbag warning light
K Luggage compartment lid/
engine compartment lidwarning light
When
theignition isswitched on,the warning
lights lightupfor alamp check.
Note

Warnings thathave been given arestored inthe
appropriate controlunitmemory andcanberead
out atan authorized Porschedealer.
This information canhelp towarn youabout situa-
tions which maybehazardous toyou oryour car.

Instrument Illumination
The illumination isautomatically adjustedtothe
ambient brightness bythe light sensor inthe
tachometer.
In addition, whenthecar lights areswitched on,
the instrument andswitch symbol brightness can
be manually adjusted.

/!\
Warning!
Risk ofan accident, personalinjuryandloss
of control.

t>
Donot reach through thesteering-wheel
spokes whiledriving. Dimming
instrument illumination

t>
Turn adjustment buttonAin the appropriate di-
rection andhold ituntil thedesired brightness
has been reached.
The chosen levelofbrightness isindicated by
a bar display inthe display fieldofthe on-board
computer. Trip
Odometer

/!\
Warning!
Risk ofan accident, personalinjuryandloss
of control.

t>
Donot reach through thesteering-wheel
spokes whiledriving.
Resetting tozero

t>
Press adjustment buttonAfor approximately
one second
or

t>
Reset thedistance inthe "SET" menuofthe on-
board computer.
Please observe thechapter "ON-BOARD COM-
PUTER (BC)"onPage 67.
After exceeding 6213milesor9999 kilometers,
the counter returnsto"0".
Controls, Instruments
59

HowEmission ControlWorks

When anautomobile engineisrunning, ituses en-
ergy generated throughthecombustion ofamix-
ture ofair and fuel. Depending onwhether acar is
driven fastorslowly orwhether theengine iscold
or hot, some ofthe fuel (hydrocarbons) maynot
be burned completely, butmay bedischarged into
the engine crankcase orexhaust system.Additon-
al hydrocarbons mayenter theatmosphere
through evaporation offuel from thefuel tank.
These hydrocarbons
(He),
when released intothe
air, contribute toundesirable pollution.
In addition, carbonmonoxide (CO)andoxides of
nitrogen (NOx)contribute toengine emissions.
They, too,areformed duringthecombustion pro-
cess anddischarged intotheexhaust system.
To reduce thesepollutants, yourPorsche is
equipped withaprecisely calibrated fuelinjection
system toassure afinely balanced air/fuelmixture
under alloperating conditions.
Oxygen
sensor

The oxygen sensor, installed inthe exhaust pipe
continuously sensestheoxygen content ofthe
exhaust andsignals theinformation toan electron-
ic control unit.Thecontrol unitcorrects theair/
fuel ratio, sothe engine always receives anaccu-
rately metered air/fuelmixture.

Crankcase ventilation

Through crankcase ventilation, undesirable emis-
sions fromtheengine crankcase arenotpermit-
ted toreach theoutside atmosphere. Theseemis-
sions arerecirculated fromthecrankcase tothe
air intake system. Fromheretheemissions mix
with theintake airand arelater burned inthe en-
gine.

Catalytic converters

The catalytic converters areefficient "clean-up"
devices builtintotheexhaust systemofthe vehi-
cle. The catalytic converters burntheundesirable
pollutants inthe exhaust gasbefore itis released
into theatmosphere.

The exclusive useofunleaded fueliscritical-
ly important forthe lifeofthe catalytic con-
verters. Therefore, onlyunleaded fuelmust
be used. The
catalytic converters willbedamaged by:

- push ortow starting thevehicle
- misfiring ofthe engine
- turning offthe ignition whilethevehicle ismov-
ing or
- driving untilthefuel tank iscompletely empty
- byother unusual operating conditions.

t>
Donot continue tooperate yourvehicle under
these conditions, sincerawfuelmight reach
the catalytic converters. Thiscould result in
overheating ofthe converters. Federallawpro-
hibits useofleaded fuelinthis car.
Maintenance, CarCare
125