tire PORSCHE 911 2009 5.G User Guide

Operation, Safety
63
Porsche Traction Management
(PTM)With PTM, the engine power is variably distributed
to the front and rear wheels.
Power distribution between the front and rear ax-
les is performed by a map-conrolled multiple-disc
clutch.
Distribution of the engine power also depends on
the difference in wheel speed between the two ax-
les.
The multiple-disc clutch always delivers sufficient
drive power to the front wheels to ensure optimum
propulsion even on an unfavorable road surface.
In combination with the Porsche Stability Manage-
ment (PSM), the PTM ensures optimum handling
and high driving stability.
Warning!
The increased control that is provided should
not induce you to take greater risks with your
safety. The limits dictated by the laws of phy-
sics cannot be overcome, even with PTM.
The risk of accidents due to inappropriate
speed cannot be reduced, even by PTM.
The driver bears the responsibility for all dri-
ving maneuvers.
fAdapt your driving style to the prevailing road
and weather conditions.
fObey all traffic laws.
Dynamometer testing procedure Some U.S. states and Canadian provinces con-
duct emissions inspection/maintenance testing in-
volving the use of two-wheel dynamometer.
A two-wheeled dynamometer is a treadmill type
device upon which a single axle of the car, the dri-
ving axle of the vehicle, rotates to simulate vehicle
operation on the road while the vehicle remains
stationary.
Your vehicle has a full-time four-wheel drive system
which cannot be disabled. Severe damage to the
powertrain can result if tested on a two-wheel dy-
namometer.
Warning!
Risk of severe powertrain damage and a pos-
sible unexpected movement of the vehicle.
fDo not test your vehicle on a two-wheel dyna-
mometer.
fAdvise the emission station of this warning be-fore testing the vehicle.
Brake testsBrake tests must be performed only on plate-type
test stands or roller test stands.
The ignition must be off.
The following limit values must not be exceeded
on roller test stands:
– Testing speed 5 mph (8 km/h)
– Test duration 20 seconds Handbrake tests Handbrake tests on the roller test stand must only
be carried out with the ignition switched off. Balancing wheels on the vehicle During finish balancing of the wheels, the vehicle
must be hoisted and all the wheels able to rotate
freely. Towing fPlease see the chapter “TOWING” on
Page 280.Wheels/TiresThe PTM control unit is adapted to the approved
tire sizes. The use of non-approved tire sizes may
lead to deviations in wheel speeds and it may influ-
ence handling or result in the PTM switching off.

90
Operation, Safety
Emptying fOpen ashtray and carefully pull out ash insert.
fLeave ashtray lid open.
Push in ash insert.
Warning!
Danger of fire.
fNever use ashtray for waste paper disposal, as it could pose a fire hazard.
Cigarette Lighter
Warning!
Danger of fire and burning.
The cigarette lighter is ready for use, regard-
less of the ignition lock position.
fNever leave unsupervised children in the car.
fNever touch the heating element or sides of
the lighter.
fHold the lighter by the knob only.
Heating lighter fOpen ashtray lid.
fPush in knob of the cigarette lighter.
When ready for use, the lighter will snap back.
Note on operation
The lighter receptacle is not to be used for
electrical accessories (except for the tire filling
compressor).
Maximum power consumption: 150 W
fPlease see the chapter “SOCKETS” on
Page 257.

Operation, Safety
95
Luggage Compartment
(Vehicles without Porsche Traction
Management PTM)Access covers A and B
Caution!
Risk of injury or damage.
fDo not store any objects behind the access covers A and B.
E- Adapter for security wheel bolts
F- Tire filling compressor
G- Towing hook
H-Tool kit
I-Tire sealantTool boxOpening
fUnlock turn-locks C.
fOpen tool box and place it on the floor of the
luggage compartment.Closing
fInsert tool box into the guide pegs in the
luggage compartment floor.
fClose tool box and lock the turn-locks C.

96
Operation, Safety
Luggage Compartment
(Vehicles with Porsche Traction
Management PTM)Access cover A
Caution!
Risk of injury or damage.
fDo not store any objects behind the access cover A.
B- Access cover for tire sealant
C- Tire filling compressor
D-Tool kit
E- Towing lug
F- Adapter for security wheel boltsTire sealantThe tire sealant is located behind the access
cover B.
fOpen access cover B using the opening.
ToolsThe tools are located under the floor plate of the
luggage compartment.
fLift the floor plate on the opening and take out.

98
Operation, Safety
Porsche Communication
Management (PCM) fRefer to the separate operating instructions
before putting the PCM into operation.
fPlease see the chapter “LOAD SWITCH-OFF
AFTER 2 HOURS OR 7 DAYS” on Page 258.
Warning!
There is a danger of accident if you set or
operate the on-board computer, radio, navi-
gation system, telephone or other equipment
when driving.
This could distract you from the traffic and
cause you to lose control of the vehicle re-
sulting in serious personal injury or death.
fOperate the components while driving only if
the traffic situation allows you to do so safely.
fCarry out any complicated operating or setting procedures only with the vehicle stationary.
The reception conditions for the radio module
integrated in the PCM change continuously as you
drive. Interference from buildings, terrain and the
weather is unavoidable.
FM stereo reception is particularly susceptible to
varying reception conditions.
Electronic accessories should only be retrofitted
by your authorized Porsche dealer.Accessories which have not been tested and
approved by Porsche may impair radio function
and reception.
NavigationWhen put into operation for the first time, a
distance of approx. 30 miles (50 km) must be
driven in order for the navigation system to
complete the process of fine calibration.
The same applies when the tires are changed (e.g.
summer/snow tires) or new tires fitted.
Full location accuracy is not yet achieved during
the fine-calibration process.
If the vehicle has been transported (e.g. ferry, car
train), the system may take a few minutes to deter-
mine the current location after it has been
switched on.
Serious tire slip (e.g. spinning wheels on snow)
may result in temporarily inaccurate navigation.
When the battery has been disconnected, it may
take up to 15 minutes before the navigation
system is operational again.
Car Audio Operation/Tips For radio operation see your radio manual
which is included with your on-board litera-
ture.
fPlease see the chapter “LOAD SWITCH-OFF AF-
TER 2 HOURS OR 7 DAYS” on Page 258.
FM reception
A vehicle is not an ideal place to listen to a radio.
Because the vehicle moves, reception conditions
are constantly changing.
Buildings, terrain, signal distance and noise from
other vehicles are all working against good recep-
tion.
Some conditions affecting FM may appear to be
problems when they are not.
The following characteristics are completely nor-
mal for a given reception area, and they do not in-
dicate any problem with the radio itself.
Note
Electronic accessories should only be installed by
your authorized Porsche dealer.
Equipment which has not been tested and ap-
proved by Porsche may impair radio reception.

112
Instruments, On-Board Computer, Warnings
Instrument Panel USA Models Also refer to the corresponding chapters in
the Owner’s Manual.
1. Engine oil temperature gage
2. Speedometer with analogue display
3. Tire pressure warning light
4. Turn signal indicator light, left
5. Tachometer
6. High beam indicator light
7. Turn signal indicator light, right
8. ABS warning light
9. Cooling system
Temperature gage, warning light
10.Fuel
Level gage, warning light
11.Engine oil pressure gage
12.Adjustment button for instrument illumination
and trip counter
13.Odometer and daily trip mileage display
14.Automatic speed control indicator light15.Light sensor for instrument illumination
16.Airbag warning light
17.Check Engine warning light
(Emission control warning light)
18.Central warning light
19.On-board computer display
20.Porsche Stability Management
PSM Multifunctional light
21.Brake warning light
22.Safety belt warning light
23.PDK transmission, gear display
24.PDK transmission, selector lever position
25.Clock and outside temperature display
26.Adjustment button for clockWhen the ignition is switched on, the warning
lights light up for a lamp check.
Note
Warnings that have been given are stored in the
appropriate control unit memory and can be read
out at an authorized Porsche dealer.
This information can help to warn you about situa-
tions which may be hazardous to you or your car.

114
Instruments, On-Board Computer, Warnings
Instrument Panel Canada Models Also refer to the corresponding chapters in
the Owner’s Manual.
1. Engine oil temperature gage
2. Speedometer with analogue display
3. Tire pressure warning light
4. Turn signal indicator light, left
5. Tachometer
6. High beam indicator light
7. Turn signal indicator light, right
8. ABS warning light
9. Cooling system
Temperature gage, warning light
10.Fuel
Level gage, warning light
11.Engine oil pressure gage
12.Adjustment button for instrument illumination
and trip counter
13.Odometer and daily trip mileage display
14.Automatic speed control indicator light15.Light sensor for instrument illumination
16.Airbag warning light
17.Check Engine warning light
(Emission control warning light)
18.Central warning light
19.On-board computer display
20.Porsche Stability Management
PSM Multifunctional light
21.Brake warning light
22.Safety belt warning light
23.PDK transmission, gear display
24.PDK transmission, selector lever position
25.Clock and outside temperature display
26.Adjustment button for clockWhen the ignition is switched on, the warning
lights light up for a lamp check.
Note
Warnings that have been given are stored in the
appropriate control unit memory and can be read
out at an authorized Porsche dealer.
This information can help to warn you about situa-
tions which may be hazardous to you or your car.

Instruments, On-Board Computer, Warnings
127
A- Digital speedometer
B-Central display
C- Bottom displayFunctions and display possibilitiesNote
The available items and displays in the on-board
computer depend on the equipment of your vehi-
cle. For this reason it is possible that some of the
items and displays shown here are not available in
your on-board computer.Basic setting
– Central display: .... Radio station
The central line B of the on-board computer can
be selected in the SET menu.
Calling on-board computer functions in
display “C”
fPush operating lever up or down
(selection field D must be switched off).
The following displays can be called step by step:
– Average speed (ø mph),
– Average consumption (ø mpg),
– Range on remaining fuel (mls ),
– Tire pressure
– Navigation information
(if activated in the SET menu).
Note
The values “Average speed”, “Average consump-
tion” and “Daily trip mileage” can be reset to zero
in the SET menu.

Instruments, On-Board Computer, Warnings
143
TPM
Tire Pressure MonitoringfPlease see the chapter “TIRE PRESSURES FOR
COLD TIRES (68 °F / 20 °C)” on Page 289.
The Tire 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 the Tire
Pressure Monitoring take place on the on-board
computer.
However, you must still adjust the tire pressure on
the wheel.fThe driver is responsible for filling the tires
correctly and making the correct settings on
the on-board computer.
The Tire Pressure Monitoring offers the following
functions:
– Display of the actual tire pressure while the
vehicle is in motion.
– Display of the deviation from the required
pressure (refilling pressure).
– Display of currently set tire size and type.
– Tire pressure warnings in two stages.
Warning!
fDespite the advantages offered by the Tire
Pressure Monitoring, it is still the driver’s re-
sponsibility to update the corresponding set-
tings in the on-board computer and maintain
the pressure in the tires.
Low tire pressure reduces the road safety of
the vehicle and destroys the tire and wheel.
fWhen a flat tire has been displayed, immedi-
ately stop in a suitable place and check the
tires for damage. If necessary, remedy the
damage with a tire sealant.
fDo not by any means continue to drive with
damaged tires.
fSealing the tire with tire sealant is only an
emergency repair, so you can drive to the next
authorized Porsche dealer. The maximum per-
mitted 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 an authorized
Porsche dealer.
fDamaged tires must be immediately replaced
by an authorized Porsche dealer.
Tire repairs are not permissible under any
circumstances.
fIf a fault occurs in the Tire Pressure Monitoring
(e.g. defective wheel transmitter), contact an
authorized Porsche dealer immediately and
have the damage repaired.
The tire pressure will not be monitored at all or
will be monitored only partially by defective
Tire Pressure Monitoring.
fTires lose air over time without a tire defect
being present. A tire pressure warning will then
appear in the on-board computer display.
Correct the tire pressure at the next oppor-
tunity.
fThe Tire Pressure Monitoring gives a warning
about tire damage due to natural pressure loss
as well as about a gradual loss of pressure due
to foreign objects.
The Tire Pressure Mnitoring cannot warn you
about tire damage that occurs suddenly (e.g.
flat tire due to abrupt external effects).

144
Instruments, On-Board Computer, Warnings Tire pressure function of the on-board
computer
The tire pressure function of the on-board
computer displays the tire pressures (actual
pressure) dependent on temperature in the four
wheels.
You can watch the tire pressure rise as the
temperature increases while driving.
This display is only for information.
fUnder no circumstances should the tire
pressures be changed based on this display.
Warning!
This display is for informational purposes
only. Under no circumstances should the tire
pressures be changed based on this display.
Changing the tire pressure to incorrect
pressures could adversely affect the perfor-
mance, driving characteristics, and safety of
your vehicle.
fMaintain tire pressures according to the units
indicated on the tire pressure plate, located on the drivers side door of the vehicle.
Displaying the tire pressure function of the
on-board computer
fPush operating lever up or down until the tire
pressure function of the on-board computer
appears.
(The selection field must be switched off.)Pressure info in tire pressure menu
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 every 18 °F (10 °C)
change in temperature.
The Tire Pressure Monitoring takes this relation-
ship between tire pressure and temperature into
account.
fPlease see the chapter “PRESSURE INCREASE
AS THE RESULT OF TEMPERATURE
INCREASE” on Page 152.
You can read the tire pressures to be
corrected in this display.