tire size PORSCHE CAYNNE 2004 1.G Owners Manual

Multi-Purpose Display and Instruments
133
fIf a tire pressure message is displayed, correct
the tire pressure at the next opportunity.
fIncomplete entries or selection of the wrong
tires on the multi-purpose display affect
correct indication of warnings and messages.
The settings in the TYRE PRESSURE menu
must be updated after wheel changes, use of
a spare wheel or changes in vehicle loading.
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 on the multi-purpose display.
Correct tire pressure.
Functional description of Tire Pressure
MonitoringTire Pressure Monitoring continuously monitors
tire pressure and tire temperature on all four
wheels and warns the driver when the tire
pressure is too low.The display as well as the settings for Tire
Pressure Monitoring take place on the multi-
purpose display in the sub-menu
TYRE PRESSURE.
However, the tire pressure must still be set
manually on the wheel.
The deviations in the tire pressures from the
required pressures are shown in the sub-menu
TYRE PRESSURE.
Example:
If the tire pressure display shows “–4 psi
(–0.3 bar)”, you must increase the tire pressure by
4 psi (0.3 bar).
The tire pressures to be monitored are fixed in the
Tire Pressure Monitoring system and cannot be
changed.
The following settings must be made to permit
correct monitoring.
–Tires
Select the type and size of the tires fitted on
the vehicle.
–Load
Select the type of loading.
Note on operation
Settings can be made only when the vehicle is
stationary.
fFor information on tires and wheels:
Please see the chapter “TIRES/WHEELS” on
Page 281.
Warning!
Your vehicle has also been equipped with a TPM
malfunction indicator to indicate when the system
is not operating properly.
The TPM malfunction indicator is combined with
the low tire pressure telltale.
When the system detects a malfunction, the
telltale will flash for approximately one minute and
then remain continuously illuminated. This
sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the
system may not be able to detect or signal low tire
pressure as intended.
TPM malfunctions may occur for a variety of
reasons, including the installation of replacement
or alternate tires or wheels on the vehicle that
prevent the TPM from functioning properly.
Always check the TPM malfunction telltale after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or alternate
tires and wheels allow the TPM to continue to
function properly.Warning light
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134
Multi-Purpose Display and Instruments
Setting the tire type and size
Warning!
Incomplete entries or selection of the wrong
tires on the multi-purpose display affect
correct indication of warnings and
messages.
fThe settings must be updated in the TYRE
PRESSURE menu after changing a wheel, filling
with tire sealant or adding air (after previous
warning “Flat tyre”).
fPlease see the chapter ““FLAT TYRE” WARNING” on Page 136.
The settings of the multi-purpose display must be
updated after changing wheels or tires on the
vehicle.
The tire type and tire size must be selected even
if the settings for the new set of wheels are the
same as for the old wheels.Note on operation
fFor information on the operating principle of
the multi-purpose display:
Please see the chapter “OPERATING
PRINCIPLE” on Page 124.After driving off, the system starts to teach the
wheels and wheel positions on the vehicle. During
this time, the tire pressure warning light on the
speedometer flashes about 60 seconds and lights
up thereafter permanently, and no current tire
pressure information is available on the displays.
Note
Information on the tire size and type can be found
on the tire sidewall. For further information on the
details on the tire sidewall:
fPlease see the chapter “INSCRIPTION ON
RADIAL TIRE” on Page 290.
Note on operation
Before fitting tires approved by Porsche with a
size which is not already stored in the multi-
purpose display, the missing information should
be supplemented in the multi-purpose display.
fGo to an authorized Porsche dealer
immediately.
1.MAIN MENU
>TYRE PRESS.
>SETTINGS
Select and confirm.
2.Select TYRES.
3.Confirm selection.
The TYRE TYPE list is displayed.
4.Select tire type (e.g. SUMMER).
The list with the possible tire sizes (e.g. for the
selection SUMMER) is displayed.
5.Select tire size (e.g. 18 inch).
6.Confirm selection.
The current settings are displayed.
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138
Multi-Purpose Display and Instruments The spare wheel and collapsible spare wheel are
not equipped with wheel transmitters and are not
monitored by Tire Pressure Monitoring.
Wheel change (without warning)The settings of the multi-purpose display must be
updated after changing wheels or tires on the
vehicle.
Please see the chapter “SETTING THE TIRE TYPE
AND SIZE” on Page 134.Setting spare wheel/sealant (without
warning)If you have fitted a spare wheel or collapsible
spare wheel or used tire sealant without being
requested to do so by a “Flat tyre” warning on the
multi-purpose display, you must subsequently
update the settings in the TYRE PRESSURE sub-
menu.Setting spare wheel.
The spare wheel is not equipped with a wheel
transmitter and is not monitored by Tire Pressure
Monitoring. The tire pressure warning light on the
speedometer flashes about 60 seconds and lights
up thereafter permanently when the ENTER button
is pressed. The value “_” is displayed in the sub-
menu TYRE PRESSURE (filling information) at the
position of the spare wheel.
The reminder SPARE WHEEL/SEALING SET
OPERATION? appears each time the ignition is
switched on. For information on spare wheel/
sealing set operation: Please see the chapter
“NOTE ON SPARE WHEEL/SEALING SET OPERA-
TION” on Page 140.
1.MAIN MENU
>TYRE PRESS.
>SETTINGS
> TYRES
> SPARE WHEEL
Select and confirm.
2.Select SPARE WHEEL.
3.Confirm selection.
The display automatically returns to the TYRE
PRESSURE sub-menu (filling information).
The required tire pressures are displayed
here.
Select BACK.
4.Confirm selection.
The basic display appears.
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Multi-Purpose Display and Instruments
141
fSet the fitted wheel set with tire type and tire
size.
Please see the chapter “SETTING THE TIRE
TYPE AND SIZE” on Page 134.
Note on operation
The reminder SPARE WHEEL/SEALING SET
OPERATION? goes out automatically after approx.
10 seconds if no selection is made during this
time. The original selection “YES” is then
maintained.In the event of faults, Tire Pressure Monitoring
cannot monitor the tire pressure. A distinction is
made between partial monitoring and inactive
system.
In the case of partial monitoring, the tire pressure
warning light on the speedometer flashes about
60 seconds and lights up thereafter permanently.
No message is output on the multi-purpose
display.
If Tire Pressure Monitoring is not active, the tire
pressure warning light on the speedometer
flashes about 60 seconds and lights up thereafter
permanently. A corresponding message is output
on the multi-purpose display.
The warning light goes out as soon as all faults
have been remedied.
Tire Pressure Monitoring switches to partial
monitoring if:
– there are up to two wheel transmitters not
present or faulty (e.g. a spare wheel or collap-
sible spare wheel is fitted that does not have a
wheel transmitter).
In the event of partial monitoring, the value “_” is
displayed in the sub-menu TYRE PRESSURE (filling
information) at the position of the faulty or missing
wheel transmitter.
Tire Pressure Monitoring is not active in the
following cases:
– Tire Pressure Monitoring is faulty,– at least three wheel transmitters for Tire
Pressure Monitoring are faulty or not present,
– temporarily after changing a wheel,
– too many wheel transmitters have been
detected,
– there is external interference by other radio
sources, e.g. wireless headphones,
– tire temperatures are too high.
fFor information on messages on the multi-
purpose display:
Please see the chapter “OVERVIEW OF
WARNING MESSAGES” on Page 149.
Notes on tire pressurePressure increase as the result of tempera-
ture increase
In accordance with physical principles, the tire
pressure changes as the temperature changes.
The tire pressure increases or decreases by
around 1.5 psi (0.1 bar) for every 18 °F (10 °C)
change in temperature.
Tire pressure specifications
The tire pressure must match the prescribed value
(required pressure).
You can find information on the tire pressure for
cold tires 68 °F (20 °C):
Faults in Tire Pressure Monitoring
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152
Multi-Purpose Display and Instruments
No monitoring
System learningAfter the tire type and size are selected in the tire pressure menu, Tire Pressure Monitoring re-learns
the tires.Wheel change?
Make new selectionThe tire type and size of the changed tires have not been updated for Tire Pressure Monitoring.
The display changes when the vehicle is stationary: Select corresponding tire type and tire size.When vehicle stops:
Hit selectionThe message appears after driving off if the warning “Flat tyre” has been cleared but the selection on
the display SELECTION AFTER WARNING has not been made properly.
Make selection on the multi-purpose display when the vehicle is stationary.Engine temperature too high Coolant or engine oil temperature is too high. Switch engine off and let it cool.
Check coolant or engine oil level. Add coolant or engine oil if necessary.Check coolant level Switch engine off and let it cool.
Check coolant level. Add coolant if necessary.Warning battery/generator Stop in a suitable place and switch engine off. Do not continue driving.
Have the fault remedied at an authorized Porsche dealer.Start engine The battery discharges if the engine is not running and loads are switched on.
Start the vehicle or switch the loads off.Electric load
Switch-offVehicle electrical system is overloaded. Certain loads (e.g. heated rear window, seat heating) will be
switched off.
Stop immediately at a suitable and secure place and check tank cap for proper fastening. If tank cap
was fastened correctly, consult your authorized Porsche dealer.
Please refuelAdd washer fluidOil level monitoring
FailureHave the fault remedied at an authorized Porsche dealer.Check oil level Check the oil level using the oil dipstick as soon as possible and add engine oil if necessary.
Light on
instrument
panel
Warning message on the multi-purpose
displayMeaning/measures
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Minor Repairs
281
Notes on minor repairsTool kit
The tool kit is accommodated in the spare-wheel
well under the cover of the loadspace floor.
Note
The tools required for changing a wheel (e.g. jack,
wheel bolt wrench, assembly aids, folding
wedges) are only supplied with the vehicle if the
vehicle comes with a collapsible spare wheel or
full-size spare wheel as standard. Your authorized
Porsche dealer will be pleased to advise you.
Tires/WheelsThe original equipment tires and wheel rims on
your Porsche comply with all applicable Federal
Motor Vehicle Safety Standards.For your safety remember the following:– Wheel rims and wheel bolts are matched to fit
your Porsche.
– If you intend to use other than original equip-
ment wheels, be sure that they conform to
Porsche specifications for your model. Only
tires with the same make and with the same
specification code (e.g. “N0”, “N1”...) can be
mounted.
– The use of wheel rims and wheel bolts that do
not meet specifications of the original factory
installed equipment will affect the safe opera-
tion of your vehicle and affect warranty
coverage.
– Before you plan on exchanging wheels, or
snow tires already mounted on the wheel rims,
consult your authorized Porsche dealer.
Your dealer has the technical information
necessary to advise you which wheel rims and
wheel bolts are compatible with the original
factory installations.
Danger!
Risk of loss of control and serious personal
injury or death.
fIf while driving, your vehicle experiences a sud-
den vibration or ride disturbance, and/or you
suspect that possible damage to your tires or
vehicle has occurred, you should immediately
reduce your speed without excessive use of
the brakes.
fStop the vehicle as soon as possible, and
inspect the tires.
If you cannot determine the cause for the
disturbance, have your vehicle towed to the
nearest Porsche or tire dealer to have your
vehicle or tire(s) inspected.
fContinuing to operate the vehicle without
correction could result in a loss of control and serious personal injury.
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Minor Repairs
283
Tire pressures
Danger!
Risk of accident.
Risk of serious personal injury or death.
Driving the vehicle with low tire pressure
increases risk of a tire failure and resulting
loss of control. Furthermore, low tire pres-
sure increases rate of wear of the affected
tires and cause damage.
fAlways use an accurate tire pressure gage
when checking inflation pressures.
fDo not exceed the maximum tire pressure
listed on the tire sidewall. (Also refer to “Tech-
nical data”).
fPlease see the chapter “TIRE PRESSURE
PLATE” on Page 284.
fCold tire inflation pressure means: all tires
must be cold, ambient temperature maximum
68°F (20°C), when adjusting the inflation pres-
sure. Avoid sunlight striking the tires before
measuring cold pressures, since the pressures
would rise from temperature influence.
fValve caps protect the valve from dust and dirt,
and thus from leakage. Always screw caps
tightly down. Replace missing caps immedi-
ately.
fUse only plastic valve caps.
fFor safety reasons, don't use tire inflating bottles.fPlease see the chapter “TIRE PRESSURES,
COLD (68 °F/20 °C)” on Page 354.
Each tire, including the spare (if provided), should
be checked monthly when cold and inflated to the
inflation pressure recommended by the vehicle
manufacturer on the vehicle placard or tire infla-
tion pressure label. (If your vehicle has tires of a
different size than the size indicated on the vehicle
placard or tire inflation pressure label, you should
determine the proper tire inflation pressure for
those tires).
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring (TPM)
that illuminates a low tire pressure telltale when
one or more of your tires is significantly under-in-
flated. Accordingly, when the low tire pressure tell-
tale illuminates, you should stop and check your
tires as soon as possible, and inflate them to the
proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can
lead to tire failure. Under-inflation also reduces
fuel efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Please note that the TPM is not a substitute for
proper tire maintenance, and it is the driver’s re-
sponsibility to maintain correct tire pressure, even
if under-inflation has not reached the level to trig-
ger illumination of the TPM low tire pressure tell-ta-
le.For further information on the tire pressure moni-
toring:
fPlease see the chapter “SETTING TIRE PRES-
SURE MONITORING” on Page 132.
When tires are warm, the tire pressure is increa-
sed.
fNever let air out of hot tires. This could cause
the tire pressure to fall below the prescribed
value.
Insufficient tire pressure can cause tires to over-
heat and thus be damaged – even invisibly. Hidden
tire damage is not eliminated by subsequently cor-
recting the tire pressure.
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284
Minor Repairs Overloading
Danger!
Risk of damage to vehicle parts, loss of con-
trol and serious personal injury or death.
fDo not overload your vehicle. Be careful about
the roof load.
fIf loading the vehicle also correct the tire pres-
sure. Tire pressure for loaded vehicle can be
found on the tire pressure plate and in the
chapter technical data.
fNever exceed the specified axle load.
Overloading 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 vehicle warranty.
fPlease see the chapter “LOADING
INFORMATION” on Page 231.
Example of a tire pressure plateTire Pressure plateInformation on the tire pressure plate
A Seating capacity
Maximum number of vehicle occupants,
including the driver.B Vehicle load limit
Is the maximum total weight limit specified of
the load (passengers and cargo) for the vehi-
cle. This is the maximum weight of passengers
and cargo that can be loaded into the vehicle.
If a trailer is being towed, the trailer tongue
weight must be included as part of the cargo
load.
Please see the chapter “LOADING
INFORMATION” on Page 231.
C Original tire size
Size of tires mounted at the factory.
D Recommended cold tire inflation pressure
These values are for cold tires (68 °F/20 °C).
E Approved tire sizes
F Size and tire pressure for the collapsible spare
wheel
Tire traction
Warning!
When driving on wet or slushy roads, a
wedge of water may build up between the
tires and the road. This phenomenon is
known as “hydroplane“ and may cause par-
tial or complete loss of traction, vehicle con-
trol or stopping ability.
fReduce speed on wet surfaces to prevent this.
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290
Minor Repairs
Example of InscriptionInscription on radial tireATire size
Example: P 255/55R18 109 Y
–P - The tire is designed for Passenger vehicle.
This information is not included on all tires.
–255 - Indication of tire width in mm
–55 - Indication of tire height to tire width ratio
in percent
–R - Belt type code letter for radial–18 - Indication of rim diameter in inches
–109 - Load capacity coefficient
–Y - Speed code letter
–XL (Extra Load) - Tire with increased load
rating
B TIN (Tire Identification Number)
Example: DOT xx xx xxxx xxxx
–DOT
The DOT symbol indicates that the tires com-
ply with the requirements of the US Depart-
ment of Transportation and provides informa-
tion about:
– first two-digit code means manufacture’s iden-
tification mark.
– second two-digit code means tire size.
– third four-digit code means tire type code.
– fourth four-digit code means date of manufac-
ture.
If, for example, the last four numbers read
1204, the tire was produced in the 12th week
of 2004.
C Tire ply composition and material
The number of layers in the tread and sidewalls
and their material composition.
D Maximum permissible inflation pressure
The maximum permissible cold inflation pressure
to which a tire can be inflated.
fDo not exceed the permissible inflation pres-
sure.
E Maximum Load rating
The maximum load in kilograms and pounds can
be carried by the tire. If you replace tires always
use a tire that has the same maximum load rating
as the factory installed tire.
FRadial
The identification indicates if the tire has radial
structure.
G Term of tubeless or tube tire
Identification for tubeless tires.
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Minor Repairs
291
Speed code letterThe speed code letter indicates the maximum per-
missible speed for the tire.
This code letter is shown on the tire sidewall.
T = up to 118 mph (190 km/h)
H = up to 131 mph (210 km/h)
V = up to 150 mph (240 km/h)
W = up to 167 mph (270 km/h)
Y = up to 186 mph (300 km/h)
Tip on driving
Tires with a maximum speed rating that is lower
than the specified maximum vehicle speed may be
mounted only if they bear an M+S identification on
the tire sidewall.
fPlease note that in addition to the winter tires,
all-season and all-terrain tires are also subject
to speed limits and bear this identification.
G-Rim width in inches
H- Rim-flange contour code letter
I- Symbol for drop-center rim
J- Rim diameter in inches
K-Double hump
L- Rim offset in mmInscription on light alloy wheelsNote on operation
fThe information is provided on the spoke. The
rim width in inches G and the rim offset L are
visible from the outside. This information can
be found near the tire valve.
A-Tool boxJackThe jack is located in tool box A under the load-
space floor.
fPlease see the chapter “OPENING
LOADSPACE FLOOR” on Page 207.
Note
The tools required for changing a wheel (e.g. jack,
wheel bolt wrench, assembly aids, folding
wedges) are only supplied with the vehicle if the
vehicle comes with a collapsible spare wheel or
full-size spare wheel as standard. Your authorized
Porsche dealer will be pleased to advise you.
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