2005 PORSCHE CAYENNE S Pressure

Controls, Safety, Instruments
87
Tire PressureThe tire pressure monitoring system monitors the
pressure in the four road wheels and warns the
driver if the pressure is too low.
The display as well as the settings for tire pres-
sure monitoring are done on the multi-purpose dis-
play in the TYRE PRESSURE menu.
However the tire pressure must be set manually
on the wheel.
The tire pressures to be monitored for tire type
are permanently set in the tire pressure
monitoring system and cannot be changed.
The driver is solely responsible for filling the tires
correctly and for selecting in the multi-purpose dis-
play.
Danger!
Risk of serious personal injury or death.
Driving the vehicle with low tire pressure in-
creases increases risk of a tire failure and re-
sulting loss of control. Furthermore, low tire
pressure increases rate of wear of the affect-
ed tires.
fWhen a flat tire has been displayed, immedi-
ately stop in a suitable place and check the
tires for damage. If necessary remedy the
damages with a tire sealant.
fDo not by any means continue to drive with
leaking tires.
fDefective tires must be immediately replaced
by a specialist workshop.
Tire repairs are not permissible under any
circumstances.
fSealing the tire with the tire sealant is only an
emergency repair, so you can drive to the next
workshop. The maximum permitted speed is
50 mph (80 km/h).
fDo not drive with tires whose tire pressure
drops again in a short period of time. In cases
of doubt, have tires checked by a specialist
workshop.
fIf the tire pressure monitoring system is
defective (e.g., defective wheel transmitter),
contact a specialist workshop immediately and
have the damages repaired.
The tire pressure will not be monitored by a
defective tire pressure monitoring system.fUse only the pressure differences shown in the
TYRE PRESSURE menu or from tire pressure
messages or warnings when correcting the
tire pressure.
fTires lose air over time without a tire defect
being present. A tire pressure warning will then
appear in the multi-purpose display.
Correct the tire pressure.
fThe tire pressure monitoring system gives a
warning about tire damages due to insufficient
tire pressure as well as about a gradual loss of
pressure due to foreign objects.
The tire pressure monitoring system cannot
warn you about tire damages occurring sud-
denly (e.g., flat tire due to sudden external ef-
fects).
fIf a message is displayed, check the tire
pressure at the next opportunity.
fBefore fitting tires approved by Porsche which
are not stored in the on-board computer, the
missing information should be supplemented
in the on-board computer.

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Controls, Safety, Instruments
Tire pressure screenIndication of tire pressures on the basic
screen "Tire pressure"
The basic screen "Tire pressure" shows the cur-
rent actual values of the tire pressures. These val-
ues would be identical to those of a pressure gage
connected to the four valves. These pressures
change while the vehicle is being driven.
– The tire pressures increase as the temperature
in the tires rises, e.g. during high-speed high-
way driving.
– The tire pressures decrease as the tempera-
tures drop, e.g. during trips in cold regions
(such as mountains).
The pressure changes by around 1.5 psi (0.1 bar)
for a temperature change of 50°F (10°C).The values displayed on the basic screen there-
fore do not allow conclusions to be drawn about
possible pressure deviations.
fUse only the pressure differences shown in the
TYRE PRESSURE menu or from tire pressure
messages or warnings when correcting the
tire pressure.
Filling informationTire pressure menu
MAIN MENU > TYRE PRESSURE
(only when vehicle is stationary)
Deviations in the tire pressures from the required
pressure are shown in the TYRE PRESSURE menu
(filling information). The tire pressure monitoring
system takes this relationship between tyre pres-
sure and temperature into account.
A “–” in front of the value indicates a pressure loss.
fThe tire pressures must be adjusted to the re-
quired pressure.
Example: If the tire pressure display shows
“–3 psi”, you must increase the tire pressure by
3psi.

Controls, Safety, Instruments
89
System learning phaseEach time a wheel is changed, the tire pressure
monitoring system re-learns the tires. The system
identifies the wheel positions.
The current tire pressures will not be available on
the multi-purpose display until the learning phase
is complete.
System learning phase
fSelect tire type and tire size in the menu TYRE
PRESSURE > SETTINGS > TYRES.
The learning process is started. The tire type
and size m ust b e sele cte d even if the se tting s
for the new set of wheels are the same as for
the old wheels.Note
The spare wheel and collapsible spare wheel do
not contain a wheel transmitter and are not
monitored by the tire pressure monitoring system.
The tire pressures for cold tires (68 °F/20 °C) are
shown in the TYRE PRESSURE menu (filling infor-
mation) during the learning phase. The required
pressure for the spare wheel is always displayed
in the TYRE PRESSURE menu (filling information).
fCheck the tire pressure for the spare wheel
and collapsible spare wheel manually.
Tire pressure menuMAIN MENU > TYRE PRESSURE
The TYRE PRESSURE menu provides an overview
of the current pressure specifications for the
respective wheel (filling information). The pressure
differences with respect to the required pressure
are specified.
If the wheels have not been learned, the current
pressures are unavailable.
The spare wheel is not monitored. The required
pressure is specified in brackets.
To make changes to the settings of the tire pres-
sure monitoring system, select SETTINGS in the
TYRE PRESSURE menu.

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Controls, Safety, Instruments
Tire pressure settingsMAIN MENU > TYRE PRESSURE > SETTINGS
Warning!
Incomplete entries on the multi-purpose
display affect correct information of
warnings and messages.
fAfter one of the following actions, the settings
must be updated in the TYRE PRESSURE
menu:
– Changing a wheel
– Filling with tire sealant
– Adding air (after previous warning “Flat tyre”)
fPlease observe the chapter “SELECTION AF-TER WARNING” on Page 97.The following settings made in this menu serve as
the basis on which the tire pressure monitoring
system determines the correct pressure.
–Ty re s
Select the type and size of the tires on the
vehicle.
–Load
Select the type of loading.
–System
Switch tire pressure monitoring on.
Note on operation
Settings can be made only when the vehicle is sta-
tionary.
Tire type menuTire typeMAIN MENU > TYRE PRESSURE > SETTINGS >
TYRE TYPE
The tire type and corresponding tire size are set in
the TYRE TYPE menu.
–Summer
– All season
– Winter
– All terrain
–Spare wheel

Controls, Safety, Instruments
91
Selection of tire sizes for summer tiresExample: Selecting summer tires
MAIN MENU > TYRE PRESSURE > SETTINGS >
TYRE TYPE > SUMMER
fSelect tire type with the rocker switch.
fPress RESET switch.
fSelect tire size with the rocker switch
(e.g. 255/55 R 18).
fPress RESET switch.
The menu returns to TYRE PRESSURE > SET-
TINGS and shows the current settings.Note on operation
fThe tire size and type can be found on the tire
sidewall.
Please observe the chapter “TIRES/WHEELS”
on Page 277.
Note
Before fitting tires approved by Porsche which are
not stored in the multi-purpose display, the
missing information should be supplemented in
the multi-purpose display.
fGo to an authorized Porsche dealer
immediately.
Speed limits for tires
Danger!
Risk of accident due to excessive speed.
This could lead to severe personal injury or
death.
fAlways observe the permissible maximum
speed of the respective tire.
fExceeding maximum tire speed could result in
a tire burst, causing lose of control of the vehi-
cle. This could lead to severe personal injury or
death.
Moreover, Porsche recommends obeying all
traffic laws at all times to maintain the safety of yourself and all vehicle occupants.
Spare wheel selectionSpare wheelMAIN MENU > TYRE PRESSURE > SETTINGS >
TYRE TYPE > SPARE WHEEL
This menu lists all possible spare wheel types
available depending on the equipment of the
vehicle.
–Spare wheel
– Collapsible spare wheel
– Sealing set
f f f

92
Controls, Safety, Instruments Spare wheel Warning!
Risk of accident.
The spare wheel does not contain a wheel
transmitter and is not monitored by the tire
pressure monitoring system.
fThe spare wheel must be used only over short distances.
fPlease observe the chapter “SPARE WHEEL”
on Page 307.
fSelect SPARE WHEEL with the rocker switch.
fPress RESET switch.
The message SYSTEM NOT ACTIVE, WORK-
SHOP appears after the RESET switch is
pressed.
The display automatically returns to the TYRE
PRESSURE menu (filling information).
The required pressure specifications can be
read.
fSelect BACK. The menu returns to the basic
screen.
The reminder SPARE WHEEL OR SEALING SET OP-
ERATION appears each time the ignition is
switched on.
fPlease observe the chapter “” on Page 98.Collapsible spare wheel
Warning!
Risk of accident.
The spare wheel does not contain a wheel
transmitter and is not monitored by the tire
pressure monitoring system.
fThe collapsible spare wheel must be used only over short distances.
fPlease observe the chapter “COLLAPSIBLE
SPARE WHEEL” on Page 302.
fSelect COLLAPSIBLE WHEEL with the rocker
switch.
fPress RESET switch.
The required pressure and speed limit for the
collapsible spare wheel are displayed at first.
This is followed by the message SYSTEM NOT
ACTIVE, WORKSHOP.
A warning appears on the multi-purpose display if
the speed limit of 50 mph (80 km/h) is exceeded.
The reminder SPARE WHEEL OR SEALING SET OP-
ERATION appears each time the ignition is
switched on.
fPlease observe the chapter “” on Page 98.Tire sealant/sealing set
Warning!
Risk of accident.
fHave the tire replaced by a specialist work-
shop as soon as possible.
fAvoid hard acceleration and high cornering
speeds.
fDo not exceed maximum speed of 50 mph
(80 km/h).
fPlease observe the safety and operating in-structions on compressor.
fPlease observe the chapter “TIRE SEALANT”
on Page 296.
fSelect SEALING SET with the rocker switch.
fPress RESET switch.
The display automatically returns to the
TYRE PRESSURE menu (filling information).
fInflate tires according to the displayed
pressure differences.
A warning appears on the multi-purpose display if
the speed limit of 50 mph (80 km/h) is exceeded.
SPARE WHEEL OR SEALING SET OPERATION ap-
pears each time the ignition is switched on.
fPlease observe the chapter “” on Page 98.

Controls, Safety, Instruments
93
LoadMAIN MENU > TYRE PRESSURE > SETTINGS >
LOAD
The tire pressure must be adjusted according to
the vehicle load.
fPlease observe the chapter “TIRE PRESSU-
RES, COLD” on Page 361.
– Partial load
up to 3 people and 46 lbs (21 kg) of luggage
– Full load
more than 3 people and 46 lbs (21 kg) of lug-
gageSelecting load
fSelect type of load with the rocker switch.
fPress RESET switch. The set load status is
shown.
Deviations from the required pressure are shown
in the menu TYRE PRESSURE > SETTINGS (filling
information).
fCorrect the pressure according to these spec-
ifications.

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Controls, Safety, Instruments
SystemMAIN MENU > TYRE PRESSURE > SETTINGS >
SYSTEM
Tire pressure monitoring can be switched on or off
in the SYSTEM menu.
If tire pressure monitoring is switched off, tire
pressures and warnings are not shown.
Tire pressure information is not available on the
tire pressure monitoring screen either.Switching on tire pressure monitoring
fSelect ON with the rocker switch.
fPress RESET switch.
The display automatically returns to the menu
TYRE PRESSURE > SETTINGS.
fCheck whether the settings in the menu agree
with the tires mounted on the vehicle. Correct
any incorrect settings before driving the vehi-
cle.
fSelect the tire type and tire size in the menu
MAIN MENU > TYRE PRESSURE > SETTINGS.
The system will re-learn the wheels only if the
tire type and tire size have been selected.
Switching off tire pressure monitoring
fSelect OFF with the rocker switch.
fPress RESET switch.
The message MONITORING OFF is displayed
for 10 seconds. The menu then returns to the
basic screen.“Monitoring off” message
If tire pressure monitoring is deactivated, the mes-
sage MONITORING OFF appears each time the ig-
nition is switched on.
fThe message is displayed for 10 seconds or
fPress RESET switch.