2009 PORSCHE 911 reset

136
Instruments, On-Board Computer, Warnings
CHRONO
StopwatchYou can use the stopwatch to measure time inter-
vals, e.g. on the race circuit or on work-related
journeys. Measured lap times can be stored and
evaluated if the vehicle is equipped with Porsche
Communication Management (PCM).
fPlease observe the chapter “Sport display” in
the separate PCM operating instructions.Stopwatch on the instrument panel
The stopwatch has an analogue and a digital dis-
play.
The large pointer of the analogue display meas-
ures the seconds. The two small pointers measure
hours and minutes. The display re-starts at zero af-
ter 12 hours.
Seconds and increments of 1/100th of a second
can be read on the digital display.
The digital display and the display in the on-board
computer can indicate up to 99 hours and
59 minutes.
The stopwatch can be swivelled both to the left
and to the right.
Stopwatch displays:
– on the stopwatch on the instrument panel,
– in the on-board computer menu CHRONO,
– on the performance display in the PCM.
Starting/stopping stopwatch
All stopwatch displays are started and stopped via
the on-board computer menu CHRONO.Note on operation
When you leave the CHRONO menu while the stop-
watch is running, measurement will continue.
The stopwatch stops after the ignition is switched
off. If the ignition is switched on again within ap-
prox. 4 minutes, the stopwatch will continue to
run.
The only way to reset the stopwatch to zero is by
selecting “Reset” in the CHRONO menu.

138
Instruments, On-Board Computer, Warnings Stopping the timing
After time measurement is started, the on-board
computer display changes to the “Stop timing/In-
termediate time”.
fSelect “Stop timing” with the operating lever.fPush lever forward.
The time is stopped in all stopwatch displays,
and the on-board computer display changes to
the “Continue/Reset” selection.
The timing can be continued or reset to zero.Continue timing
After timing has been stopped, the on-board com-
puter display changes to the “Continue/Reset” se-
lection.

Instruments, On-Board Computer, Warnings
139
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 com-
puter display changes to the “Continue/Reset” se-
lection.
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.

Instruments, On-Board Computer, Warnings
155
SET
Basic setting on on-board computerSwitching on selection field “D”
fPush operating lever forward.
Changing the basic setting of the on-board
computer
fSelect “SET” with the operating lever.
fPush operating lever forward.
fSelect the desired function with the operating
lever:Reset
– Reset all,
Reset average consumption,
Reset average speed,
Reset trip counter
Units
– Speedometer: km - km/h, miles - mph
–Consumption:
l/100 km, mls/gal (USA), mpg (UK), km/l
– Temperature: °Celsius, °Fahrenheit
– Tire pressure: bar, psi

Instruments, On-Board Computer, Warnings
157
General information regarding the
on-board computer functionsRange on remaining fuel
The range on remaining fuel is continuously recal-
culated during the journey based on the fuel level,
current consumption and average consumption.
The more the fuel level falls, the more spontan-
eously the display reacts. For this reason, the
range on remaining fuel is not displayed if less
than 9 miles (15 kilometers).
If the vehicle's inclination changes while driving or
refueling, incorrect range information may tempo-
rarily be given.
Note
If the tank is nearly empty and you top up with only
a small quantity of fuel, an accurate range on re-
maining fuel is impossible.Average consumption and average speed
The values displayed are based on the distance
travelled since the last reset to “zero”.
You can set the starting time for a measurement
before or during the trip.
Switching the ignition off does not reset the meas-
urements. It is therefore possible to collect values
over long periods.
Disconnecting the car battery will cause these
memories to be erased.
Tire pressure
The Tire pressure function of the on-board
computer displays the tire pressures dependent
on temperature in the four wheels. You can watch
the tire pressure rise and fall while driving.
The display is only for information.
fTo correct the tire pressures, always use the
displayed values from the “Info pressure”
display in the tire pressure menu.