sensor PORSCHE CAYMAN 2006 1.G Information Manual

· 37 · · 36 ·The new Cayman and the Cayman S |
Drive
Integrated dry-sump
lubrication.
This proprietary Porsche
technology ensures consistent
lubrication in even the most
extreme high-speed corners.
Oil is extracted from each of the
cylinder heads by a dedicated
scavenge pump. The oil return
system features narrow-section
lines which de-foam the oil before
it is collected in the integral sump.
A third pump then feeds the oil
back to the lubrication points and
the cycle begins once more. A
stable oil pressure is maintained
throughout the engine, even
during racetrack use.
Oil-level indicator.
Both Cayman models have an
electronic oil-level indicator as
part of the on-board computer
system. The reading is so precise
that a conventional dipstick is not
required.
Engine cooling.
Both flat-six engines have a
cross-flow cooling system with
all coolant channels cast in the
block. With no external hoses
or pipework involved, the system
is much more secure than
conventional designs.
Coolant is supplied separately
to each individual cylinder, so
it never arrives pre-warmed. As
well as maintaining a consistent
engine temperature, this means
the valves are much less
susceptible to wear. Important
benefits include greater engine
reliability, less risk of knocking,
better fuel economy, lower
emissions and reduced mechanical
noise.
Engine management system
with electronic throttle.
The Motronic ME7.8 engine
management system is the
primary source of control for
all engine-related systems and
processes, e.g., ignition and
fuel supply. It is an essential
prerequisite for enhanced
performance in all operating
conditions. The electronic throttle
is not only more precise, it can
modulate the volume of incoming
air to compensate for sudden load
transfer (e.g., when lifting off the
throttle before braking). Electronic
engine management ensures
better power delivery from a
standing start and a smoother rev-
limiter action. It also coordinates
the various sub-systems within the
Used to regulate /control
Engine management system
(Motronic ME7.8)
Engine load
Throttle-pedal position
Oxygen sensor signals
Engine speed (from crankshaft)
Inlet camshaft phase angle
Knock sensor signals
Vehicle speed
Air-conditioning settings
Engine immobiliser status
Ambient pressure
Sport Chrono button
Temperatures
– coolant
– intake air
– engine oil
– air in engine compartment
Ignition
Fuel injection
Idling via throttle
and ignition
Heating elements in oxygen sensors
Fuel-tank venting
CAN interface to instrument cluster,
transmission control unit, stability control system, etc.Moment interface to
Porsche Stability Management (PSM)
Input data
Twin-flow valve in intake manifold
Resonance valve in intake manifold
Inlet camshaft phase angle
Inlet valve lift
Secondary air injection
Engine fan
Starter
Diagnostics
Air-conditioning compressor
standard Porsche Stability
Management (PSM), e.g., anti-slip
regulation (ASR) and the automatic
brake differential (ABD). Other
important functions include
coordination and control of the
optional Tiptronic S transmission,
the oxygen sensors in the exhaust,
variable valve timing (VarioCam
Plus) and cylinder-specific knock
control.
Cayman S

· 41 · · 40 ·The new Cayman and the Cayman S |
Drive
Ignition system.
The ignition system in the Cayman
and Cayman S features static
high-voltage technology. Separate
coils on each of the plugs ensure
perfect ignition every time. With
no central coil, there is no need
for leads, which are a frequent
source of faults. All six coils are
directly controlled by the engine
management system. This
Cylinder-specific knock control.
Since temperatures tend to
vary across the engine, each
cylinder is monitored separately
for unwanted pre-ignition of the
air/fuel mix. If a risk is detected
in one or more cylinders, the
timing is adjusted on the
corresponding spark plug.
The system is effective under
all engine conditions, including
extremely heavy loads at low
rpm.
Exhaust system.
Both Cayman models have a
specially designed stainless steel
exhaust system. Gas is passed
from each bank of cylinders
through twin cross-linked silencer
units and exits the car through
a central tailpipe. A system of
four oxygen sensors – one before
and one after each of the two
pre-catalytic converters – provides
separate monitoring of the gas
composition and catalyst
performance for each cylinder
bank.
arrangement means they can
also be integrated with other
electronic-based systems. If the
optional Tiptronic S, for example,
requests smoother downshifts,
the system responds within a
fraction of a second and adjusts
the ignition timing.
Since a twin-tract layout allows a
higher rate of throughput than a
conventional exhaust, the system
also has a positive impact on
overall power and torque. It also
contributes to the distinctive
engine sound – on starting, at
idle and across the entire engine
speed range.
For even more powerful acoustics,
both cars can be equipped with
an optional sports exhaust system.
Servicing.
Regular servicing is extremely
important on any high-precision
machine. In the case of a
Porsche, it is equally important
to give you maximum enjoyment
from your car. We therefore aim
to reduce servicing requirements
and extend all service intervals.
The generator, power-steering
pump and air-conditioning
compressor are all driven by a
single, self-adjusting belt. Under
normal usage, the drive chains
for the cam and auxiliary shafts
are entirely maintenance-free.
The ignition system is also
maintenance-free, with the sole
exception of the spark plugs
(60,000 miles). The engine oil
interval is 20,000 miles, while
hydraulic tappets provide
automatic clearance adjustment
on each of the 24 valves.
In short: when we design a car
for the road, that’s where we
intend it to stay.Exhaust system
Dual-tube tailpipe (Cayman S) Single-tube tailpipe (Cayman)Cayman

· 45 · · 44 ·
Tiptronic S.
Both Cayman models are available
with five-speed Tiptronic S as
optional equipment. This versatile
system combines an automatic
transmission with the option of
manual gearshifts.
For manual control, simply slot
the gear selector into the manual
gate and use the gearshift controls
on the steering wheel. Press up
to change up, and down to change
down. Gearshifts are performed
in around 0.2 seconds with
virtually no interruption in drive.
The action is comparable with
that of a manual gearbox.
Switch to automatic, and you can
still change gear by hand using
the rocker controls on the steering
wheel. This race-derived function
is particularly useful during
overtaking manoeuvres. If there
is no manual input for a period
of eight seconds, the system will
revert to automatic mode. The
drive position and gear selection
are displayed at all times on a
dedicated cockpit display.
In automatic mode, Tiptronic S
can choose from a range of
gearshift points for each individual
gear. The standard gearshift
pattern, designed for maximum
fuel economy, can be steplessly
varied up to a dedicated ‘Sport’
configuration for optimum high-
performance driving. Each
gearshift point is automatically
selected based on current road
conditions and driving style. Within
a short space of time, you’ll
develop a feel for the system and
begin to influence gearshifts using
the throttle alone. The benefits
of Tiptronic S are particularly
apparent when exploring the car’s
performance. Even in automatic,
the rapid gearshift action
enhances the agility of the car.
The new Cayman and the Cayman S |Drive
Manual gearbox with
dual-mass flywheel.
Both the Cayman and Cayman S
are specifically designed for a more
immediate driving experience. A
crucial element within that concept
is the standard manual gearbox.
The new Cayman has a five-speed
unit as standard equipm
ent. The
optional Sport package combines a
How do we make the most of engine performance?
By knowing how to apply it.
Transmission.
mechanical noise and thus greater
focus on the natural sound of the
engine. The flywheel is mated to
a hydraulically operated clutch,
while the final drive ratio has been
carefully selected for optimum
sports performance. The gearshift
mechanism is cable operated
so as to insulate the lever against
vibration from the engine and
gearbox.
Other useful functions include a
warm-up programme, automatic
selection of the ‘Sport’ gearshift
pattern by means of rapid throttle
inputs, gearshift suppression
during cornering manoeuvres,
automatic downshifts under heavy
braking, an incline sensor
(improves uphill acceleration and
downhill engine braking), a nd
automatic upshifts when traction
is threatened under braking in
the wet.
If the optional Sport Chrono
Package is enabled, the gearshift
action is even more direct and
responsive. If you happen to be
driving in manual mode, automatic
upshifts are restricted.
six-speed manual gearbox with
Porsche Active Suspension
Management (PASM – see page
52). The Cayman S has a six-speed
unit as standard. Both gearbox
types have a short-throw action
and a balanced spread of ratios
which are specially adapted to
the individual character of each car.
A dual-mass flywheel ensures
smoother delivery with reduced
Tiptronic S gear selector Tiptronic S control on steering wheel
Cayman S

· 53 · · 52 ·The new Cayman and the Cayman S |
Chassis
Porsche Active Suspension
Management (PASM).
PASM is an electronic damping
control system. Available on
both Cayman models, it offers
continuous adjustment of
individual damping forces based
on current road conditions and
driving style. Agility and driving
pleasure are significantly
enhanced while retaining the
car’s natural ride quality. Equipped
with PASM, the car rides 10 mm
lower than with the standard
steel-sprung suspension.
The driver can choose one of
two setup modes, ‘Normal’ or
‘Sport’. While the first is a blend
of performance and comfort, the
‘Sport’ setup ratings are generally
much firmer, enabling greater
agility on the racetrack. In either
mode, the system responds to
changing loads by automatically
applying the optimum damping
rate on each individual wheel.
The rates are selected from a
range of map options which are
specially adapted to the unique
dynamics of the Cayman and
Cayman S.
The movement of the body is
continuously monitored under
acceleration, braking and cornering
manoeuvres, as well as on poor
road surfaces. Other sensors
provide additional information on
lateral acceleration, steering
angle, brake pressure and engine
torque. A dedicated control unitprovides real-time analysis and
damper adjustment as defined
for the respective setup mode
(‘Normal’ or ‘Sport’). The result:
greater stability and more
consistent occupant comfort.
If, when ‘Sport’ mode is selected,
the quality of road surface drops
below a certain threshold, the
system immediately switches
to
a softer rating and restores
the car’s traction and grip.
When the road surface improves,
PASM returns to the original,
harder ratings. The system
remains active in ‘Normal’ mode,
too, automatically switching to a
harder setup if the car is driven
more assertively. As the dampers
become stiffer, the car becomes
more stable and driver control is
improved.
Rebound in ‘Normal’ mode –
damper piston with bypass
valve openRebound in ‘Sport’ mode –
damper piston with bypass
valve closed
Compression in ‘Sport’ mode –
damper piston with bypass
valve closed Compression in ‘Normal’ mode –
damper piston with bypass
valve open

· 64 ·The new Cayman and the Cayman S |
Safety
it can never suspend the laws of
physics, PSM does provide that
extra margin of safety whenever
you need it most. A key component
in PSM is a specially optimised
anti-lock braking system (ABS)
offering safer deceleration and
shorter braking distances. PSM
is also invaluable when applying
the throttle on low-grip surfaces.
Here, it uses the ABD (automatic
brake differential) and ASR
(anti-slip regulation) functions to
maintain traction and stability.
In order to retain the car’s natural
agility, PSM combines a high
trigger threshold with precision
input characteristics.
Porsche Stability
Management (PSM).
This automatic vehicle stability
control system is standard
equipment on both Cayman
models. Throughout each journey,
PSM uses a range of sensors to
monitor the direction, speed, yaw
velocity and lateral acceleration
of the car. Using this information,
it is possible to calculate the
actual direction of travel at any
given moment. If the car begins
to oversteer or understeer,
PSM applies selective braking on
individual wheels to restore
stability and optimum speed. WhileThe PSM threshold is raised
higher still when ‘Sport’ mode is
selected on the optional Sport
Chrono Package/Sport Chrono
Package Plus. The resulting
drive is much more involving,
particularly at speeds up to
around 70 km / h (44 mph). If
you’d rather enjoy the car
unassisted, the system can be set
to standby. When ‘Sport’ mode is
selected, PSM will only intervene
under heavy braking where both
front wheels are in danger of
locking. In ‘Normal’ mode, PSM
automatically becomes active
as soon as one of the front
wheels requires ABS assistance.The upper section of each door
features additional reinforcements
(3) which enhance the rigidity of
the car. This upper load path (4)
is used to channel energy into
the side of the car and thus
provide additional protection for
the passenger cell.
Passive safety.
Both Cayman models easily
comply with all statutory
requirements in respect of frontal,
side, diagonal, rear impact and
rollover protection.
The bodyshell structure contains
a highly resilient passenger
cell offering exceptional crash
protection. At the front of the
car, the cell is protected by a
patented system of longitudinal
and transverse members (1). In
the event of an accident, energy
is absorbed and distributed by
the front-end structure, thereby
minimising cell deformation.
Additional features include a
bulkhead cross-member (2) made
from super high-strength steel.
This element is designed to
absorb impact forces from the
longitudinal members and thus
protect both front footwells.
· 65 ·
Sheet steel
Tailored blanks
High-strength steel
Super high-strength steel
Aluminium
1
1
1
1
3
42
Cayman

· 73 · · 72 ·The new Cayman and the Cayman S |
Comfort
consumption, average speed,
range till empty and audio
information.
Steering wheel.
Both Cayman models have a three-
spoke leather steering
wheel with full-size airbag as
Instruments.
A single glance is all it takes –
particularly when it comes to the
instruments. The familiar Porsche
grouping of symmetrical round
instruments forms an integral
part of the cockpit design.Above the instruments is a
specially designed shroud with
semi-transparent grille. The dials
on the new Cayman have a black
background, while those on the
Cayman S have an aluminium-
coloured finish. Both sets of
instruments feature crisp white
backlight illumination. An integral
light sensor automatically adjuststhe degree of illumination to match
the ambient light conditions.
The dials provide a continuous
overview of all key information,
including external temperature,
time, trip odometer, total odometer
and vehicle speed. You can also
view a range of additional data
from the standard on-board
computer, e.g., average fuel
access to audio, navigation and
– if fitted – telephone functions
(only in conjunction with PCM).
For a detailed overview of the
available steering wheel options,
see pages 109-113. standard. Special features include
40 mm of height and reach
adjustment. A smooth leather
finish is available as an optional
extra on the steering wheel rim
and airbag module. Alternatively,
you can specify a three-spoke
sports or three-spoke multifunction
wheel. The latter is equipped with
six integral keys offering direct
Cayman dashboard with optional equipment, e.g., leather interior package with two-tone combination, PCM

· 75 · · 74 ·
Sports seats.
The optional leather sports seats
offer firmer upholstery than the
standard seat design. Higher side
bolsters on backrest and squab
provide additional lateral support.
The fore/aft position and height
are mechanically adjustable, while
the backrest is electrically
controlled.
Electrically adjustable seats.
This second seat option features
full electric adjustment of fore/aft
position, height, backrest angle,
squab angle and lumbar support.
A memory function stores your
seat and lumbar support settings
along with the exterior mirror
positions. Two sets of preferences
can be stored and selected using
buttons conveniently located on
the door panel. A further set of
preferences can be stored in each
of the two key remotes. When
either of the remotes is used to
open the doors, the corresponding
seat and mirror settings are
automatically selected.
The new Cayman and the Cayman S |Comfort
Adaptive sports seats.
This alternative seat option
combines excellent comfort with
a driver memory function. The
comprehensive range of power
adjustment controls include
fore/aft position, height, backrest
angle, squab angle and lumbar
support. The side bolsters
on backrest and squab are
pneumatically adjustable for the
perfect fit. This exceptional
variability ensures generous
comfort on long-distance journeys
as well as precision support when
cornering. The memory function
includes both exterior mirrors as
well as all seat settings except
for the squab and backrest side
bolsters.
Seat heating.
All seat variants can be equipped
with an optional two-stage heating
function for backrest and squab.
Air conditioning.
The standard air conditioning in
the new Cayman and Cayman S
offers quiet, efficient operation.
Settings can be adjusted from
either seat position using simple
plus and minus keys.
For optimum comfort, you can
select different temperature
settings for the upper and lower
areas of the cockpit. Other
convenient features include a
windscreen defroster function.
As an optional alternative, we
can equip your car with a fully
automatic air-conditioning system.
Offering consistent control of
interior temperature, the
system uses a solar sensor
to compensate for the effects
of ambient light.
Cruise control.
This optional system provides
automatic speed control between
30 and 240 km / h (20-149 mph).
It is operated via a separate
control stalk on the steering
column and can be used in all
available gears.
Standard seats.
The standard seats have a
leatherette finish with Alcantara
facings. Special features include
thorax airbags in each seat
backrest, enhanced lateral
support, and a specially designed
spring system that is adapted to
the chassis of the car. The high
side bolsters provide optimum
support without any feeling of
restriction. Generous seat travel
and adjustment options mean that
even taller drivers can find the
ideal seat position. The backrest
angle is electrically controlled,
while the fore/aft position and
height are mechanically adjustable.
Two-stage heating is available as
an optional extra.
Electrically adjustable seat Adaptive sports seat Sports seatAutomatic air conditioning

· 77 ·
Rear screen.
Both models have a large, tinted
and heated rear screen offering
excellent rearward visibility.
A detachable fabric screen on
the inside of the rear lid provides
additional privacy for the main
luggage area.
Rear wiper.
Both Cayman models can also
be equipped with a highly
effective and streamlined rear
wiper system. Its elegant form
blends harmoniously with the
exterior design.
ParkAssist.
This optional parking aid is
automatically enabled whenever
you select reverse gear.
Move too close to a stationary
object and a warning signal is
emitted. Continue to reverse and
the tone increases in frequency.
The distance is measured by a
row of ultrasonic sensors, which
are neatly concealed in the rear
bumper.
The new Cayman and the Cayman S |Comfort
‘Welcome Home’ lighting.
This standard lighting function
provides comfort and safety
when using the car after dark.
The foglights and taillights are
automatically illuminated when the
car is locked or unlocked using
the key remote. The lights remain
illuminated for 30 seconds,
lighting your way to or from the
car. This delay is user-adjustable
on vehicles with optional Sport
Chrono Package Plus and Porsche
Communication Management
(PCM).
HomeLink®.
This optional garage-door opener
is freely programmable and
integrated within the cockpit. It
offers remote control of up to
three garage, gate, home lighting
and/or alarm systems. Compatible
with virtually all garage and gate
systems.
Water-repellent side windows.
The side window glass on both
Cayman models has a highly
effective water-repellent finish. By
rapidly dispersing moisture and
dirt, it ensures optimum visibility
in the wet. (Note: surface finish
requires occasional renewal
depending on vehicle usage.)
Front wipers.
The front wipers have an adjustable
wipe interval, are aerodynamically
designed and park neatly out
of sight when not in use. The
right-hand blade has a bowed
construction enabling maximum
wiper coverage. The windscreen
washer system features two
heated nozzles with integral filter
element. An optional rain sensor
is also available in conjunction
with the auto-dimming interior and
exterior mirrors.
Cayman S with ParkAssist
· 76 ·Rear screen

· 89 · · 88 ·
EnvironmentThere are two possibilities when
it comes to protecting the
environment: react to regulations
or establish your own and
incorporate them within the
development process. For us,
there has only ever been one
way. With the Cayman and
Cayman S, we have followed that
path as on every Porsche before.
So while their powerful capability
is second to none, it doesn’t
come at any price. At Porsche,
the principle of high performanceextends to every area of the
car. Including its relationship
with the environment. That is our
commitment with the Cayman
and Cayman S. Why settle for
anything less?

4 catalytic converters with
4 Lambda sensors

EU4 /ULEV II-compliant

Lengthy service intervals

Modest fuel consumption

85 % recyclable (approx.)

· 90 ·
Exhaust emission control.
Four-valve cylinder heads and
VarioCam Plus ensure minimal
emissions at source. After leaving
the engine, the gases are cleaned
by a system of four catalytic
converters and four ‘Lambda’ or
oxygen sensors. Controlling it
all with optimum efficiency is
the Motronic ME7.8 engine
management system. Each bank
of cylinders has its own Lambda
circuit, enabling precision
adjustment of the air/fuel mix.
Each exhaust tract has two
Lambda sensors, one upstream
and one downstream of the
primary catalyst.* The resulting
benefits include full compliance
with both the EU4 emissions
standard and ULEV II regulations
in the United States, as well as
excellent fuel economy.
Noise.
The Cayman and Cayman S comply
with all current noise regulations
without any form of engine
encapsulation. To do that, we’ve
eliminated noise at source in
every area of each car. Engine
components are rigid, moving
parts are light, and tolerances
have been reduced to a minimum.
The result is a pure and distinctive
sound – with all the character
you’d expect from a Porsche.
Fuel system.
All fuel lines are made from robust
aluminium, while those carrying
vapours are multi-layer plastic. The
result is a significant reduction in
the evaporation of hydrocarbons.
Materials and recycling.
All structural components,
switchgear and trim are made
from fully recyclable materials.
Better still, it is highly unlikely
that they will ever need recycling
at all. Long-term durability is,
after all, one of the defining
qualities of every Porsche car.
A key objective during the
development process was all-
round weight reduction. This was
achieved using cast aluminium
alloys, synthetic materials and
high-tensile metals. Used correctly,
this blend of materials is both
stronger and lighter than
conventional
steel. As well as
reducing fuel consumption, it
offers positive environmental
benefits.
Approximately 85 % of all com-
ponents can already be recycled
using today’s technology. This
proportion is set to increase as
* Not featured in markets with leaded fuel.The new Cayman and the Cayman S |
Environment
new thermal methods are
introduced. To simplify recycling,
all synthetic components are
clearly labelled in accordance
with the relevant standards.
Both Cayman models are entirely
free of CFCs and components
manufactured with the aid of
these chemicals. Water-based
paints are used throughout each
car, thereby reducing the need
for chemical solvents during the
production process.
Servicing.
Longer service intervals are not
only more convenient for you, they
are also better for the environment.
With the new Cayman and
Cayman S, we have achieved
very modest servicing
requirements: engine oil every
20,000 miles (or two years),
oil filter every 20,000 miles, air
filter every 40,000 miles, spark
plugs every 60,000 miles (or
four years), and brake fluid every
two years.
In addition to the obvious
environmental benefits, the
advantage for you is two-fold: a
lower cost of ownership throughout
the life of the car, and more time
spent on the road. Based on
mileage alone, the new Cayman
models require just three stops
for servicing every 60,000 miles,
or one service every two years.
· 91 ·
There’s a world of driving pleasure to explore.
It needn’t cost the earth.
Cayman