PORSCHE 911 GT3 2010 5.G Owners Manual

130
Instruments, On-Board Computer fPush operating lever forward.
The stopwatch displays continue the timing.
The on-board computer display returns to the
“Stop timing/Intermediate time” selection. You
can stop the stopwatch or measure an inter-
mediate time.Resetting the time
After timing has been stopped, the on-board
computer display changes to the “Continue/
Reset” selection.
fSelect “Reset” with the operating lever.fPush operating lever forward.
The display returns to the “Start timing”
selection.
The stopwatch displays in the instrument panel
and the on-board computer are reset to zero.
10_GT3_21.book Seite 130 Donnerstag, 4. Juni 2009 12:48 12

Instruments, On-Board Computer
131
A-Lap
B- Intermediate timeDisplaying intermediate times
Several intermediate times can be displayed for a
route or for a lap on the race circuit. The interme-
diate times B are for your information.
Measured lap times A can be stored and evalu-
ated if the vehicle is equipped with Porsche
Communication Management (PCM).To display an intermediate time:
After timing has been started, the on-board
computer display changes to the “Stop timing/
Intermediate time” selection.fSelect “Intermediate time” with the operating
lever and push the operating lever forwards.
The intermediate time will be displayed for
approx. 5 seconds.
10_GT3_21.book Seite 131 Donnerstag, 4. Juni 2009 12:48 12

132
Instruments, On-Board Computer The on-board computer display then returns to the
“Stop timing/Intermediate time” selection.
fYou can stop the stopwatch or measure
another intermediate time.In order to start timing a new lap:
The “New lap?” selection appears for 5 seconds
after selection of “Intermediate time”.
fSelect “New lap?” with the operating lever and
push the operating lever forwards.The new lap is displayed on the on-board
computer and the PCM. Timing on the on-board
computer and on the PCM begins from zero. The
stopwatch in the instrument panel continues to
show the total time.
10_GT3_21.book Seite 132 Donnerstag, 4. Juni 2009 12:48 12

Instruments, On-Board Computer
133
fThe on-board computer display returns to the
“Stop timing/Intermediate time” selection after
a short period.
fYou can stop the stopwatch or measure
another intermediate time or a new lap.
PCM information
If you wish to store the lap time in the PCM, the
performance display in the “Trip/Sport display”
menu of the PCM must be selected.
AUDIOSwitching on selection field “D”
fPush operating lever forward.
Selecting a radio station
fSelect “AUDIO” with the operating lever.
fPush operating lever forward.
fSelect the desired station.
fPush the operating lever up or down.
NAVISwitching on selection field “D”
fPush operating lever forward.
Select destination
fSelect “NAVI” with the operating lever.
fPush operating lever forward.
fSelect the desired function with the operating
lever:
– Last destinations
– Destination memory
– Route guidance
10_GT3_21.book Seite 133 Donnerstag, 4. Juni 2009 12:48 12

134
Instruments, On-Board Computer
TPM
Tire Pressure MonitoringfPlease see the chapter “TIRE PRESSURES FOR
COLD TIRES 68 °F/20 °C” on Page 237.
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 type.
– Tire pressure warnings in two stages.
Warning!
Despite the advantages offered by the Tire
Pressure Monitoring, it is still the driver’s
responsibility to update the corresponding
settings 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, immedia-
tely 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
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 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).
10_GT3_21.book Seite 134 Donnerstag, 4. Juni 2009 12:48 12

Instruments, On-Board Computer
135
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 tempe-
rature 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 142.
You can read the tire pressures to be
corrected in this display.
10_GT3_21.book Seite 135 Donnerstag, 4. Juni 2009 12:48 12

136
Instruments, On-Board Computer The tire pressure to be corrected (refill pressure)
is indicated on the displayed wheel.
Example: If “ –1.5 psi (–0.1 bar)” is displayed,
1.5 psi (0.1 bar) must be added to this tire.
Note
The tire pressure menu can only be called up when
the vehicle is stationary.
Calling up the “Info pressure” display
fPush operating lever forward in order to switch
on the selection field.
fSelect “TPM” with the operating lever.
fPush operating lever forward.
The display changes to the tire pressure menu.
fSelect “Info pressure” with the operating lever.
fPush operating lever forward.
Note
After the ignition is switched on, it can take up to
approx. 1 minute before all tire pressures are
displayed. Dashes (“-.-”) appear instead of the tire
pressures. Tire type info in tire pressure menu
Information about the currently set tires:
– Tire type: Summer tires, winter tires
“Info tires” shows the current tire settings.
Calling up the “Info tires” display
fPush operating lever forward in order to switch
on the selection field.
fSelect “TPM” with the operating lever.
fPush operating lever forward.
The display changes to the tire pressure menu.fSelect “Info tires” with the operating lever.
fPush operating lever forward.
Tire selection in the “Set” menu
fPush operating lever forward in order to switch
on the selection field.
fSelect “TPM” with the operating lever.
10_GT3_21.book Seite 136 Donnerstag, 4. Juni 2009 12:48 12

Instruments, On-Board Computer
137
fPush operating lever forward.
The display changes to the tire pressure menu.fSelect “Set” with the operating lever.fPush the operating lever forward.
fSelect desired tire type:
summer or winter.
fPush operating lever forward.
A display for confirming the selected type of
tire appears.
10_GT3_21.book Seite 137 Donnerstag, 4. Juni 2009 12:48 12

138
Instruments, On-Board Computer fSelect “Continue” and push the operating lever
forward.The tire selection has only been successfully
completed when the message “Process
complete” is displayed by the on-board computer.
fSelect arrow (Back) and push the operating
lever forward. The display returns to the tire
pressure menu.
The on-board computer additionally displays
the message “System learning”.Note
The message “Process aborted” appears if the
setting process is interrupted. All entries made up
to this point are lost, and the original settings
remain in effect.
Only if the message “Process complete” appears
after the settings have been made will the Tire
Pressure Monitoring re-learn the wheels.
fPlease see the chapter “SYSTEM LEARNING”
on Page 140.
Before fitting tires with sizes which are not stored
in the on-board computer, the missing information
should be supplemented in the on-board
computer.
fPlease consult your authorized Porsche
dealer.
fUse only tires approved by Porsche.
The available items in the tire pressure menu
depend on the equipment of your vehicle. For this
reason it is possible that some of the items shown
here are not available on your on-board
computer’s display.
fMake sure that tire pressures correspond to
the on-board computer settings. Correct the
tire pressure if necessary.
fPlease see the chapter “TIRE PRESSURES FOR
COLD TIRES 68 °F/20 °C” on Page 237.
10_GT3_21.book Seite 138 Donnerstag, 4. Juni 2009 12:48 12

Instruments, On-Board Computer
139
Tire pressure warnings
The tire pressure warning light on the instrument
panel and a corresponding message on the on-
board computer warn about loss of pressure in
two stages, depending on the amount of pressure
loss.
Driving with insufficient tire pressure reduces the
road safety of the vehicle and destroys the tire and
wheel.
Stage 1 – Add air
The pressure in the tire is too low by 4 to 7 psi (0.3
to 0.5 bar).
fThe tire pressure warning contains the
affected tire with the tire pressure to be added.
Correct the tire pressure at the next
opportunity. This tire pressure warning appears
– for approx. 10 seconds with vehicle stopped
when switching off the ignition or
– again when switching on the ignition.
With ignition on, the warning can be deactivated.
The tire pressure warning light in the instrument
panel goes out only when the tire pressure has
been corrected.Stage 2 – Flat tire
At speeds below 100 mph (160 km/h):
The pressure in the tire has dropped by more
than 7 psi (0.5 bar). This significant pressure
loss is a danger to road safety.
At speeds above 100 mph (160 km/h):
The pressure in the tire has dropped by more
than 5 psi (0.4 bar). This significant pressure
loss is a danger to road safety.
fWhen the tire pressure warning appears, stop
immediately at a suitable location. Check the
indicated tire for signs of damage. If neces-
sary, fill in tire sealant and set the correct tire
pressure.
10_GT3_21.book Seite 139 Donnerstag, 4. Juni 2009 12:48 12