2008 PORSCHE CAYENNE ignition

Model range
More agility. More efficiency. More safety.
So far, it all makes perfect sense.
The Cayenne Turbo.
This enormous potential is trans-
mitted to the road through the stand-
ard six-speed Tiptronic S.Running
on 19-inch Cayenne Design
wheels,
the benchmark sprint to
100 km / h
(62 mph) is completed in just
5.1 seconds. At 210 km / h (131 mph),
the standard air suspen
sion is
automatically lowered to
increase
stability and aerodynamic
efficiency.
Maximum speed is 275 km / h
(171 mph).
Porsche Active Suspension
Management (PASM) continuously
modifies the damping force on
each wheel based on changing
road conditions and driving style.
The optional Porsche Dynamic
Chassis Control (PDCC) helps to
minimise body-roll when cornering.
This not only enhances occupant
comfort, it also improves contact
with the road. Pulse rate climbing. Shiver down
the spine. Both natural reactions
in a turbocharged Porsche.
The Cayenne Turbo is one of the
most remarkable examples of
the Porsche performance principle.
Blending power with comfort,
it does so in style without ever
compromising on either.
Start the ignition, and immediately
you sense the energy latent in
the 4.8-litre twin-turbo V8.
Featuring direct fuel injection (DFI),
it develops 368 kW (500 hp) at
6,000 rpm. Maximum torque
of 700 Nm is available between
2,250 and 4,500 rpm.Press the ‘Sport’ button on the
centre console and the throttle
becomes more responsive,
the engine more dynamic and
Tiptronic S more direct. At
the same time, Porsche Active
Suspension Management (PASM)
is also switching to ‘Sport’ mode.
The air suspension is automatically
lowered to the more streamlined
Low Level I.
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· 58 · · 57 · · 56 ·
Used to regulate /control Input data Used to regulate /control
Engine management system
(MED 9.1)
Engine load
Throttle-valve angle
Oxygen sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Air-conditioning settings
Throttle pedal position
Temperatures
– Coolant
– Intake air
– Engine oil
– Ambient air
Zündung
Direct fuel injection (DFI)
Idling via throttle valve and ignition
Heating elements in oxygen sensors
Demand-controlled fuel pump
Fuel-tank venting
CAN interface to PSM control unit, transmission control unit, engine immobiliser, instrument cluster,
air-conditioning control unit, ‘Sport’ button, on-board diagnostics, etc.
Input data
Camshaft phase angle
Engine fan
Starter
Fuel pressure
Throttle valve
Intake manifold resonance valve
Engine management functions in the Cayenne S, Cayenne GTS and Cayenne Turbo. Engine management functions in the Cayenne.
Drive
Maximum freedom requires total control.
Electronic engine management.
The electronic engine management
system provides coordinated
regulation of all engine functions
and associated systems in all
operating conditions.
The basic principle of engine
management is simple. Throughout
each journey, the system monitors
a range of input data and compares
it with corresponding sets of
reference values (‘maps’). Key
engine functions, such as ignition
and fuel injection, can be seamlessly
and automatically adjusted. The
results: optimum fuel economy and
lower emissions as well as greater
power and torque.One of the most important systems
controlled by engine management
is the electronic throttle, a
prerequisitefor Porsche Stability
Management
(PSM). Other major
functions include on-board diagnos-
tics and cylinder-specific knock
control featuring automatic compen-
sation for changes in fuel quality.
On the Cayenne, Cayenne S
and Cayenne GTS, the engine
management system controls
the variable-tract intake manifold.
On the Cayenne Turbo, it regulates
the turbo boost pressure.
Fuel pressure
Oil pressure
Engine management system
(EMS SDI 4.1)
Throttle-valve angle
Oxygen sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Air-conditioning settings
Throttle pedal position
Temperatures
– Coolant
– Intake air
– Engine oil
– Ambient air
Ignition
Direct fuel injection (DFI)
Idling via throttle valve and ignition
Heating elements in oxygen sensors
Demand-controlled fuel pump
Fuel-tank venting
CAN interface to PSM control unit, transmission control unit, engine immobiliser, instrument cluster,
air-conditioning control unit, ‘Sport’ button, on-board diagnostics, etc.
Valve lift (VarioCam Plus)
Engine fan
Starter
Fuel pressure
Throttle valve
Intake manifold resonance valve
(Cayenne S/Cayenne GTS)
Fuel pressure
Oil pressure
Wastegate frequency valve
(Cayenne Turbo only)
Bypass valves (Cayenne Turbo only)
Camshaft phase angle
Oil pressure
Engine load
Ignition
Cylinder-specific knock control
Cylinder-specific knock control

· 61 · · 60 · · 59 ·
The smallest things can make the biggest difference.
Even a single spark.
Ignition system.
The Cayenne models have a
static high-voltage ignition
system with separate ignition
coils on each individual plug.
As well as providing a more consistent spark, this is a
more reliable alternative to
a conventional distributor and
leads. The role of distributor
is performed by the engine
management system. As well
as improving performance
and economy, emissions are
prevented at source.
Drive
Committed to a purer driving experience.
Exhaust system.Spend less on servicing.
And more time on the road.
the Cayenne S (in conjunction
with Tiptronic S), it has a
performance sound setting
which is automatically enabled in
‘Sport’ mode. The package also
includes twin dual-tube tailpipes
with chrome-plated finish. (Note:
vehicles equipped with the sports
exhaust system have a reduced
off-road capability.)
All exhaust systems – standard
and sports – comply with all
relevant emissions legislation.
Longer service intervals are
not only more convenient and
financially attractive, they are
also better for the environment.
Each Cayenne model offers
three clear benefits: lower
servicing costs, more time on
the road and a more eco-friendly
use of resources.For more information on service
intervals, please refer to the
separate price list for the Cayenne
model range.
Twin single-tube tailpipes
(Cayenne and Cayenne S)Twin dual-tube tailpipes
(Cayenne Turbo) Sports exhaust tailpipes, chrome-plated
(Cayenne GTS)
The lightweight exhaust systems
in the Cayenne models are made
f
rom special, long-life stainless
steel.
Short exhaust manifolds enable
rapid heating of the primary
catalysts, a basic prerequisite
for early and more effective
emissions control.
The engine management system
is also involved in preventing
emissions at source. Inside each
of the two primary catalytic
converters are two oxygen
sensors. These supply a real-time
analysis of exhaust gas compos-
ition. Based on this information,
the engine management system
can adjust the air/fuel mix as
required. This control system
ensures low emissions in all oper-
ating scenarios. The primary and
main catalysts offer high efficiency,
faster warm-up, a long service
life and consistently low emissions
(see page 104).
The Cayenne GTS has a sports
exhaust system as standard.
Also
available as an option on

Environment
Servicing.
Although every journey is a pleasure
in a Porsche, there’s one you won’t
have to make too often. Thanks to
the lengthy service intervals and
long-life components, we may not
be seeing you for some time.
In the case of the oil filter, for
example, all that’s replaced is an
easily recyclable paper element.
The oil filter casing remains on
the car.
All moving parts inside the engine
are fully self-adjusting. The valve
clearances, for example, feature
automatic hydraulic control.
All camshafts have a zero-
maintenance chain-drive system.With single-spark coils on each
of the cylinders, the entire ignition
system, with the exception of the
spark plugs, is maintenance-free.
These modest servicing require-
ments mean less waste disposal
and fewer demands on natural
resources. They also lower the
cost of ownership while keeping
your car on the road.
Service intervals for the Cayenne
models are dependent on a range
of factors, including local fuel
quality. For full details of service
intervals in your country/region,
please consult the relevant price
list or contact your Porsche Centre.
Materials and recycling.
Owning a Porsche should be a
lasting pleasure with minimal
impact on the environment. That’s
why every Porsche is built to
endure both technically and in
terms of design. The lightweight
exhaust on the Cayenne models,
for example, is constructed from
long-life stainless steel.
Weight reduction is a fundamental
part of the Porsche design philoso-
phy. By using a greater proportion
of high-strength materials, e.g.,
special steels, cast aluminium
alloys and synthetic materials, we
have successfully reduced the
weight of each car and therefore
its fuel consumption. Every produc-
tion process we use at Porsche
is designed with the environment
in mind. Also, every Porsche model
is
entirely free of asbestos, CFCs
and
components manufacturedusing
CFCs. All legal requirements
in respect of recycling are fulfilled.
Materials are labelled in accordance
with VDA 260, enabling better
recycling of end-of-life vehicles and
individual parts and assemblies.
While more than 85 % of the car
can be recycled using current
technologies, the chances are
your new Cayenne may never need
recycling at all. After all, two thirds
of all the cars we have ever made
are still on the road today.
· 111 · · 110 ·

Comfort, ergonomics and security.
Anti-theft protection.
The Cayenne models are all
equipped as standard with an
engine immobiliser and anti-theft
alarm featuring ultrasonic interior
surveillance.
The alarm circuit includes all four
doors, engine lid, tailgate, rear
screen, interior, ignition and trailer
(if fitted).
The immobiliser system works by
automatically communicating with
the vehicle key. If the key is ap-
proved, the engine can be started
as normal.
When the key is removed from the
ignition, the steering column is
automatically locked to provide
additional security.
Porsche Entry & Drive.
With this optional system, you can
reduce the inconvenience of a con-
ventional key.
The moment you touch the door
handle
, the system automatically
checks the encrypted access code
on the key in your pocket. If the
code is accepted, the doors are
unlocked. To start or stop the
engine, simply push the ignition
button.
To lock the car on leaving, all you
have to do is press a button on the
outside of the door handle. Porsche
Entry & Drive then secures the car
doors, arms the immobiliser and
locks the steering column.
Preparation for vehicle
tracking system.
This optional preparation available
for all Cayenne models enables
future installation of a vehicle
tracking system obtainable from
Porsche Tequipment. The system
can be used to locate a stolen
vehicle across much of Europe.
Includes special wiring loom,
higher capacity battery (depend-
ing on vehicle specification) and
tilt sensor for the alarm system.
Cruise control.
Standard on the Cayenne Turbo
and optional on all other models,
cruise control offers increased
comfort on long-distance journeys.
It can be used at speeds between
30 and 240 km / h (19 and 149 mph)
and is activated using a button on
one of the control stalks.
Slide /tilt sunroof.
Available as an option on all
Cayenne models, the slide/tilt
sunroof is made from tinted
single-pane safety glass and has
a manually adjustable sunscreen.
The roof position is easily adjusted
using a single illuminated rotary
control. The sunroof also has
an anti-jam facility, as do all the
electric windows.
Comfort lighting package.
One of the special features in this
optional package is the ‘Welcome
Home’ lighting function. When you
arrive at a destination after dark,
the headlights remain
illuminated
Comfort
for a user-defined period, lighting
your path from the car. Other
features include courtesy lights
on both exterior
mirrors, auto-
matic headlight activation and
automatically dimming interior
and exterior mirrors.
· 127 · · 126 ·

Explore the world.
In every direction.
Panoramic roof system.
The electrically operated
panoramic roof system is available
as an option on all Cayenne models.
Made from laminated safety glass,
it has a total surface area of
approximately 1.4 square metres –
almost four times larger than the
optional slide/tilt sunroof. Even
when closed, it provides a unique
‘open-top’ driving experience. The
panoramic view can be enjoyed
from all seat positions in every
type of weather.
A key advantage of the panoramic
roof system is its variability. The
roof consists of three movable
segments (1 – 3) and one fixedsegment (4). When the roof is
opened, the forward segment (1)
tilts upwards to act as a wind
deflector. Even at high speed
it helps reduce turbulence and
noise. The two middle segments
(2 and 3) can be opened
separately to provide a stream
of fresh air to the front or rear.For the ultimate open-top driving
experience, both central segments
can be fully retracted to the rear.
It is also possible to tilt segment
3 (above rear seats) to provide
additional ventilation. In all, there
are 15 roof settings to choose
from.
An electrically operated sunscreen
protects the interior against direct
sunlight.
The roof settings are
selected using a single illuminated
rotary control located on the roof
console. When the car is stationary,
it can also be operated using the
ignition key in the door lock.
Comfort
Panoramic roof system opened fullyPanoramic roof system closed
Panoramic roof system opened at rear
43 2 1
43 2 1
43 2 1
· 129 · · 128 ·

Index
N
Navigation 132
O
Off-road capability 82
Off-road Technology
package 88
On-board computer 132
P
Panoramic roof system 128
ParkAssist 124
Payload 184
Performance 42, 182
Personalisation 148
Porsche Active Suspension
Management (PASM) 76
Porsche Ceramic
Composite Brake (PCCB) 96
Porsche Communication
Management (PCM) 132
Porsche Drive-off
Assistant
62, 85
Porsche Dynamic
Chassis Control (PDCC) 80
Porsche Entry & Drive 126
Porsche Hill Control (PHC)86
T
Technical data 182
Tiptronic S 64
Touchscreen 132
Towbar systems 147, 158
Transfer gearbox 66
Transmission 64, 66
Turbochargers 55
TV tuner 134
Tyre Pressure
Monitoring (TPM) 75
U
Universal audio interface 135
USB port 135
V
Variable valve timing 52
VarioCam Plus 53
Vehicle tracking system 126
Voice control 134
W
Water-repellent side windows12 3
Wheel articulation 81, 86
Wheels 75, 160, 161
Wiper system 124
A
Acoustics 108
Air conditioning 122
Air suspension 78, 189
Airbags 102
Alloy engine 48
All-wheel drive 66
Anti-slip regulation 66
Anti-theft protection 126
Audio systems 130, 136
Automatic brake differential 66
Automatic tailgate 144
Axle concept 72
B
Bluetooth®13 4
Bodyshell 100
BOSE
®
Surround Sound System 136
Brakes 94
C
CD autochanger 131
CD radio 130
Centre differential 66
Ceramic brakes 96
Chassis 68 Child seats 119
Colours 150
Comfort lighting package 127
Cooling system 49
Cruise control 126
D
Direct fuel injection (DFI) 50
DVD autochanger 131
E
Electronic engine management57
Electronic logbook 134
Emissions 106
Engine braking support 86
Engines V6/V8/ Turbo 42 – 45
Exhaust system 60
F
Factory collection 174
G
GPS navigation system 132
GSM telephone 134
H
Hands-free telephony 134 Headlights 92
Heat-insulating glass 123
HomeLink
®
(garage-door opener) 164
I
Ignition system 59
Intake manifold 54
Interior 114, 151
Interior lighting 120
iPod
®13 5
L
Lighting 92
Loading options 142
Lubrication 49
Luggage compartment 140
M
Manual gearbox 62
Materials 110
Mobile phone 134
Mobile phone preparation 130
Monochrome black
exterior package 152
MP3 135
Multifunction
steering wheel 114, 164
· 191 · · 190 ·
Index
Porsche Hill Holder 65, 85
Porsche Stability
Management (PSM) 98
Porsche Traction
Management (PTM) 66
Powerkit Cayenne Turbo 46
Privacy glass 123
R
Recycling 110
Reversing camera 125
Roof transport systems 146
S
Safety 90
Seats 116, 118
Servicing 61, 110
Servotronic 74
Slide/tilt sunroof 127
Sport button 51
SportDesign package 152
Steering 74
Storage compartments 120