2005 PORSCHE CAYENNE S tire pressure

98
Controls, Safety, Instruments
Warning “When vehicle stops:
Hit selection”If you drive off after changing a wheel or inflating
the tires and neglect to make a selection in the
screen SELECTION AFTER WARNING, the following
message will appear: WHEN VEHICLE STOPS:
HIT SELECTION
fThe next time you stop the vehicle, perform
the settings in the “Selection after warning”.
Wheel change messageThe WHEEL CHANGE? CHECK SETTINGS
message appears after a wheel change, if the tire
type and tire size of the new tires have not been
set in the TYRE PRESSURE > SETTINGS menu.
When the vehicle is stationary, the display
changes to SELECTION AFTER WARNING.
fPlease observe the chapter “SELECTION
AFTER WARNING” on Page 97.
fSelect WHEEL CHANGE. The menu
automatically changes to TYRE TYPE.
fSelect the appropriate tire type and tire size.
Only if the tire type and size are selected will
the tire pressure monitoring system re-learn
the tires.
Message “Spare wheel or sealing set
operation”The message SPARE WHEEL OR SEALING SET
OPERATION? appears after switching on the
ignition if a spare wheel type (spare wheel,
collapsible spare wheel, or sealing set) was set.
fSelect YES or NO with the rocker switch.
fPress RESET switch.

Controls, Safety, Instruments
99
Ye s :
– In case of sealing-set operation, the menu
changes directly to the basic screen. All
settings are retained.
– If the vehicle is operated with a collapsible
spare wheel or spare wheel, the warning mes-
sage “SYSTEM NOT ACTIVE, WORKSHOP” is
initially displayed for 10 seconds. The system
then returns to the basic screen.
No:
The display automatically returns to the menu
TYRE PRESSURE > SETTINGS.
fSet the mounted tire set with tire type and tire
size. The system will re-learn the tires.
No monitoringIn the event of faults the tire pressure monitoring
cannot monitor the tire pressure.
The warning light on the instrument panel and a
message on the multi-purpose display light up.
Monitoring is not active when:
– the tire pressure monitoring system is faulty,
– wheel transmitters for the tire pressure
monitoring system are not present,
– temporarily after changing a wheel,
– has detected too many wheel transmitters,
– there is external interference by other radio
sources, e.g., wireless headphones,
– tire temperatures are too high.
fPlease observe the chapter “WARNING LIGHTS
AND WARNING MESSAGES” on Page 108.fAll warnings and messages in the tire pressure
monitoring system are also indicated by the
warning light in the instrument panel.
The warning light goes out as soon as all faults
are remedied.
Tire pressure monitoring system
warning light

100
Controls, Safety, Instruments
Pressure increase as the result of
temperature increaseA - Tire pressure
B - Tire temperature
C - Tire pressure for cold tires
D - Tire pressure for hot tires
E - Pressure increase as the result of temperature
increase
F - Pressure drop in faulty/leaking tires
1 - Required-pressure line
2 - Notification of tire-pressure loss
(from -3 to -6 psi/-0.2 bar to -0.4 bar)
3 - Flat-tire warning (as of -6 psi/-0,4 bar)
In accordance with physical principles, the air
pressure changes as the temperature changes.
The tire pressure increases or decreases by
around 1.5 psi (0.1 bar) for a temperature change
of 50°F (10°C).Tire pressure specificationsThe tire pressure must match the prescribed value
(required pressure).
You can find information on the tire pressure for
cold tires (68°F/20°C):
– In the TYRE PRESSURE menu (filling informa-
tion):
As a deviation from the required pressure for
each wheel if the system has learned the
values.
– In the TYRE PRESSURE menu (filling informa-
tion):
As a required pressure for each axle if the
system has not learned the values.
– And in the front left door aperture for each
wheel.
fPlease observe the chapter “TIRE PRESSU-
RES, COLD” on Page 361.
Insufficient tire pressure can cause tires to
overheat and thus be damaged – even invisibly.
Hidden tire damage is not eliminated by subse-
quently correcting the tire pressure.
fPlease observe the chapter “TIRES/WHEELS”
on Page 277.

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Controls, Safety, Instruments
Warning – Flat tire – Check tires Stop in a suitable place and check the tires. Change wheel if
necessary.
Check spare wheel – Required pressure:
50 psi/3.4 barAppears about every 6 months.
Check if the pressure of the mounted spare wheel matches the
required pressure, as it is not monitored electronically.
Tire pressure too low – Add air System detects a pressure loss of at least 2.9 psi. (0.2 bar).
Correct tire pressure at the next opportunity.
Collapsible spare wheel/sealing set
max. 50 mph (80 km/h) Observe maximum permitted speed.
Collapsible spare wheel 51 psi/3.5 bar
max. 50 mph (80 km/h) Information on driving with a collapsible spare wheel.
Observe maximum speed of max 50 mph or 80 km/h and
required pressure of 51 psi or 3.5 bar.
System not activeIndication when spare wheel or collapsible spare wheel is used
or tire pressure monitoring system is faulty.
Consult a qualified specialist workshop.
Select new set of wheels in the Tire pressure menu after
changing the wheels.
System not active – Brief disturbanceExternal interference (e.g., wireless headphones) or excessive
temperature (over 248 °F/120 °C) at the wheel transmitters.
Tire pressure monitoring system will reactivate itself.
System not active –
Too many wheel transmittersTire pressure monitoring system detects more than 4 wheel
transmitters (winter wheels in in the luggage compartment,
for example).
System will reactivate itself.
No monitoring – System learning After the tire type and size are selected in the tire pressure
menu, the system re-learns the tires.
Wheel change? Check settings Display after a wheel change without changed settings in the tire
pressure menu. Select tire type and size.
Instrument
panelMulti-purpose
displayText display Meaning/measures

Controls, Safety, Instruments
111
When vehicle stops: Hit selection Displayed after a flat tire if the system was not informed about
the work performed.
Make a selection on the multi-purpose display when the vehicle
is stationary.
Monitoring off Tire pressure monitoring was intentionally deactivated.
Tire pressure monitoring can be switched on or off on the
multi-purpose display.
Engine temperature too high Switch engine off and let it cool.
Check coolant level. Add coolant if necessary.
Check coolant level Switch engine off and let it cool.
Check coolant level. Add coolant if necessary.
Battery/generator warning Stop in a suitable place and switch engine off. Do not continue
driving.
Have the fault remedied at an authorized Porsche dealer.
Starting engine The battery discharges if the engine is not running and loads are
switched on.
Start the vehicle or switch the loads off.
Electrics – Loads – Switch-off Vehicle electrical system is overloaded. Certain loads (e.g.
heated rear window, seat heating) will be switched off.
Please refuel
Topping up washer fluid
Oil level monitoring – Failure – Workshop Have the fault remedied at an authorized Porsche dealer.
Checking the oil level
Instrument
panelMulti-purpose
displayText display Meaning/measures

Controls, Safety, Instruments
163
Front ultrasound sensorsSensors
Six ultrasound sensors in the front and rear
bumpers measure the distance to the closest ob-
stacle.
– Range of outer sensors
(front and rear):
approx. 24 in. (60 cm)
– Range of front middle sensors (arrow):
approx. 48 in. (120 cm)
Rear ultrasound sensors– Range of rear middle sensors (arrow)
(only in vehicles without spare wheel bracket):
approx. 59 in. (150 cm)
– Range of rear middle sensors
(only in vehicles with spare wheel bracket):
approx. 48 in. (120 cm)
Obstacles cannot be detected in the "blind" sensor
area (above and below the sensors).Maintenance note
fThe sensors must always be kept free of dust,
ice and snow in order to ensure that they are
fully functional.
fDo not damage sensors by abrasion or
scratching.
fMaintain sufficient distance when cleaning with
steam-jet units.
The sensors will be damaged if the pressure is
too high.
Note on operation
The rear ultrasound sensors may not function
correctly if tires that have not been recommended
by Porsche are fitted on the spare wheel bracket.
If the spare wheel bracket is open, this may impair
the function of the rear ultrasound sensors.
In vehicles that have air suspension with level
control and height adjustment, the system may
not recognise obstacles near the ground at terrain
level or special terrain level.

Controls, Safety, Instruments
195
Loading InformationDefinitionsThe towing capacity (gross weight of the trailer)
is the sum of the trailer's empty weight and the
weight of the load.
The vertical coupling load is the weight that the
trailer drawbar exerts on the trailer coupling of the
vehicle.
The rear-axle load is the vehicle weight on the
rear axle plus the weight of the transported load
and the vertical coupling load of the trailer.
The gross weight of the vehicle and trailer is
the sum of the weight of the towing vehicle and the
weight of the trailer.
The Curb weight - actual weight of your vehicle -
vehicle weight including standard and optional
equipment, fluids, emergency tools, and spare tire
assembly. This weight does not include passen-
gers and cargo.
The Gross Vehicle Weight is sum of the curb
weight and the weight of passengers and cargo
combined.
The Gross Vehicle Weight Rating is the maxi-
mum total weight of vehicle, passengers, lug-
gage, hitch, trailer tongue load and optional equip-
ment.The Gross Axle Weight Rating is the maximum
load limit for the front or the rear axle. This infor-
mation is located on the safety comliance sticker
located in the driver’s side door jamb.
For determining the compatibility of the tire and
vehicle load capabilities:
fPlease observe the chapter “TIRES, RIMS,
TRACKS” on Page 358.
The load capacity coefficient (e.g. “106”) is a mi-
nimum requirement.
The Gross Combined Weight Rating is the
maximum total weight rating of vehicle, passen-
gers, cargo and trailer.
The Vehicle Capacity Weight - Load Limit - is
the maximum total weight limit specified of the
load (passengers and cargo) for the vehicle. This
is the maximum weight of passengers and cargo
that can be loaded into the vehicle. This informa-
tion can be found on the tire pressure plate.
If a trailer is being towed, the trailer tongue weight
must be included as part of the cargo load.
The maximum loaded vehicle weight is the
sum of curb weight, accessory weight, vehicle ca-
pacity weight and production options weight.
The load rating is the maximum load that a tire
is rated to carry for a given inflation pressure.
The maximum load rating is the load rating for
a tire at the maximum permissble inflation pres-
sure.The cargo capacity is the permissible weight of
cargo, the substracted weight of passengers from
the load limit.
fNever exceed the permissible limits.
Danger!
Risk of personal injury or death.
Injuries are much more likely in an accident
if persons ride in the cargo area.
fPersons must ride only on the seats provided
for this purpose.
fMake sure that everybody fastens their safety
belts.
Risk of personal injury, loss of control and
damage to vehicle.
fNever exceed the specified axle loads. Over-
loading can shorten the service life of the tires
and car, as well as lead to dangerous vehicle
reactions and long braking distances. Damage
due to overloading is not covered by the vehic-le warranty.

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Controls, Safety, Instruments
Example for determining the combined weight of occup-
ants and cargoVehicle Load CapacityfThe combined weight of occupants and cargo
should never exceed the weight shown on the
tire plate in the vehicle.
Please observe the chapter “TIRE PRESSURE
PLATE” on Page 281.
fNever exceed the number of passengers
shown on the tire pressure plate in the vehicle.Determining the combined weight of
occupants and cargo:
fAdd the weight of all occupants and then add
the total luggage weight (figure).
Steps for determining correct load limit
1. Locate the statement "The combined weight of
occupants and cargo should never exceed XXX
pounds" on your vehicle’s placard (depending
on the date of manufacture)
2. Determine the combined weight of the driver
and passengers that will be riding in your vehic-
le.
3. Subtract the combined weight of the driver and
passengers from XXX kilograms or XXX
pounds.
4. The resulting figure equals the available
amount of cargo and luggage load capacity.
For example, if the "XXX" amount equals 1400
lbs. and there will be five - 150 lb passengers
in your vehicle, the amount of available cargo
and luggage load capacity is 650 lbs. (1400 -
750 (5 x 150) = 650 lbs.)
5. Determine the combined weight of luggage
and cargo being loaded on the vehicle. That
weight may not safely exceed the available car-
go and luggage load capacity calculated in
Step 4.
6. If your vehicle will be towing a trailer, load from
your trailer will be transferred to your vehicle.
Consult this manual to determine how this re-
duces the available cargo and luggage load ca-
pacity of your vehicle.