ECU PORSCHE 911 2009 5.G Owner's Manual

Shifting Gears
169
Drive-Off AssistantThe Drive-Off Assistant assists the driver when
moving off on hills.
The vehicle must have sufficient road contact.
The Drive-Off Assistant is available on gradients as
from around 5%.
Danger!
Risk of accident.
Assistance by the Drive-Off Assistant is not
guaranteed when moving off on a slippery
surface (e.g. on icy or loose surfaces). In this
case, the vehicle could slip.
The limits dictated by the laws of physics
cannot be overcome, even with the Drive-Off
Assistant. The responsibility for moving off
on upward slopes is still the driver’s, despite
the Drive-Off Assistant.
fAlways adjust your driving style to the driving
conditions and vehicle load, use the brake
pedal if necessary.
Risk of accident.
If the Drive-Off Assistant is not functioning,
the driver cannot be assisted when moving
off on hills.
fHold the vehicle with the brake pedal.Driving off with the Drive-Off Assistant
(vehicles with manual transmission)
1. Hold the vehicle securely on the slope with the
brake pedal.
The engine must be running.
2. Fully depress the clutch pedal.
3. Engage a gear corresponding to the direction
of travel up the slope (1st gear or reverse
gear).
4. Fully release the parking brake.
5. While keeping the clutch pedal depressed,
release the brake pedal.
The vehicle is held on the slope for a short time
in order to allow driving off directly after the
brake is released.
6. Move off as usual.
Note on operation
The Drive-Off Assistant is not active:
– If the clutch is not depressed.
– If the vehicle is not stationary.
– If the engine is not running.
– On gradients of less than 5%.
– If the pressure on the brake pedal is too low.Driving off with the Drive-Off Assistant
(vehicles with PDK transmission)
1. Hold the vehicle securely on the slope with the
brake pedal.
The engine must be running.
2. Select a gear corresponding to the direction
of travel up the slope (selector lever position
Dor R).
3. Fully release the parking brake.
4. Release the brake pedal.
The vehicle is held on the slope for a short time
in order to allow driving off directly after the
brake is released.
5. Move off as usual.
Note on operation
The Drive-Off Assistant is not active:
– In the event of shift to neutral.
– If the vehicle is not stationary.
– If the engine is not running.
– On gradients of less than 5%.
– If the pressure on the brake pedal is too low.

Shifting Gears
175
Depending on driving speed and engine speed,
you can shift up or down at any time.
Gear changes which would exceed the upper or
lower engine speed limit are not executed by the
controller.
There is no automatic upshift at the upper engine
speed limit in selector lever position M. Upshift
suppression can be cancelled by kickdown opera-
tion. If, for example, the engine speed limit is
reached during overtaking and the automatic
upshift does not occur, the transmission in this
case shifts up as a result of kickdown operation.
fSelect an appropriately low gear on upward
and downward slopes.
This will ensure optimum use of engine power
and engine braking.
In order to shift up automatically at the upper
engine speed limit:
fDepress the accelerator pedal beyond the full-
throttle point (kickdown).Failure of the selector lever display on the
instrument cluster
The warning “Transmission emergency run” is
displayed in red on the on-board computer.
–Effect:
No selector lever position is displayed on the
instrument cluster.
Vehicle can be driven only until it comes to a
stop.
Remedy:
It is not possible to continue driving. Immedi-
ately stop the vehicle in a suitable place. Have
the vehicle towed to an authorized Porsche
dealer.
StoppingfFor a brief stop (e.g. at a traffic light), leave the
selector lever in drive position and hold the
vehicle with the brake pedal.
fDo not hold the car on a slope using the
accelerator. Use the brake pedal or the
handbrake instead.
fBefore leaving the vehicle, always apply the
handbrake and move the selector lever to
position P.ParkingfGo easy on the accelerator!
fWhen parking or manoeuvring in a small
space, control the speed by careful use of the
footbrake.Driving in winterIn wintry road conditions it is advisable to take
steep inclines in manual mode. This prevents gear
changes occurring that could cause wheelspin.Tow-starting, towingfPlease see the chapter “TOWING” on
Page 280.

204
Mobile Roofs
Roof Transport System(Coupé only)
fPlease follow the separate instructions for fit-
ting the Roof Transport System.
fOnly use Roof Transport Systems from the
Porsche Tequipment product range or Roof
Transport Systems which have been tested
and approved for your car by Porsche.
Fitting normal commercially available luggage
racks is not possible.
The Porsche Roof Transport System allows you
to carry various sports and hobby equipment.
Your authorized Porsche dealer will be pleased to
tell you about the various different uses of the
Roof Transport System.
Safety notes!
fCompletely remove the Roof Transport System
before using an automatic car wash – risk of
damage to the vehicle!
fDo not exceed the maximum permitted pay-
load, the maximum permitted gross weight
and the maximum permitted axle loads.
Please see the chapter “WEIGHTS COUPÉ” on
Page 291.
fDistribute load evenly, with heavy items as low
as possible.
Items of luggage must not project beyond the
side of the load area.
fFix and secure every item to the basic carrier
with a rope or lashing strap (do not use elastic
rubber tensioners).
fBefore every journey, and at regular intervals
during long trips, check that Roof Transport
System and load are secure. Re-tighten if nec-
essary and secure additionally by locking.When the Roof Transport System is loaded, the
maximum speed depends on the nature, size and
weight of the load being carried.
Driving, braking and steerin g b e h a v i o r c h a n g e d u e
to the higher center of gravity and the greater
wind-resistant area. You should adapt your driving
style appropriately.
Since fuel consumption and noise are increased
with the Roof Transport System fitted, it should
not remain on the vehicle if not in use.

Maintenance, Car Care
223
Wiper Blades Wiper blades that are in perfect condition are vital
for a clear view.
fReplace the wiper blades twice per year (be-
fore and after the cold season) or whenever
wiper performance deteriorates.
Caution!
Risk of damage if the wiper arm accidentally
falls back on to the window.
fAlways hold the wiper arm securely when re-
placing the wiper blade.
Risk of damage if wiper blades that are fro-
zen in place are loosened improperly.
fThaw the wiper blades before loosening them.
Maintenance note
fPeriodically clean the wiper blades with win-
dow cleaner, especially after the vehicle has
been washed in a car wash.
We recommend the Porsche window cleaner. If
they are very dirty (e.g. with insect remains),
they can be cleaned with a sponge or cloth.If the wiper blades rub or squeak, this can be as a
result of the following:
– If the vehicle is washed in an automatic car
wash, wax residues may adhere to the wind-
shield. These wax residues can be removed
only by using window cleaner concentrate.
– The wiper blades may be damaged or worn.
fReplace damaged or worn wiper blades as
soon as possible.
fPlease see the chapter “WASHER FLUID” on
Page 220.
fPlease contact your authorized Porsche dealer
for further information.
Changing windshield wiper bladesfPlease read the separate instructions for fitting
wiper blades as supplied by the manufacturer.
fWe recommend that you get your authorized
Porsche dealer to replace the wiper blades.
Caution!
Risk of damage.
If the wiper blades are not changed properly,
they can come loose when the car is moving.
fCheck that the wiper blades are seated
securely. The wiper blades must engage properly in the wiper arm.

230
Maintenance, Car Care fGently wipe the surface without applying too
much pressure.
fDo not clean when dry.
fNever use other chemical cleaners or
solvents.
fRinse cleaned surfaces with clear water.
Leather Characteristics and special features
The natural surface markings of leather, e.g.
creases, healed scars, insect sting marks, struc-
tural differences and slight variations in shade and
grain add to the attractiveness of the natural leath-
er product.
Observe the following care instructions:
Caution!
The leather will be damaged by the use of
unsuitable cleaning and care agents and by
incorrect treatment.
fDo not use caustic cleaners or hard cleaning
aids.
fPerforated leather must under no circumstances get wet on its reverse side.
fClean all types of leather regularly to remove
fine dust using a soft, damp, white woollen
cloth or a commercially available microfibre
cloth.fRemove heavy contamination with a leather
cleaner.
Always read the instructions for use given on
the containers.
We recommend Porsche leather cleaner.
Treat cleaned leather only with a leather care pro-
duct.
We recommend the Porsche leather care product.
Cleaning airbags covers
Danger!
There is a danger of serious personal injury
or death if the airbag system is impaired by
improper cleaning work.
fDo not make any modifications whatsoever on
individual components such as the padded
covers of the steering wheel, passenger side
instrument panel, the front seats and the door
linings.
fLet your authorized Porsche dealer clean these components.
Carpets and floor-mats fUse only a vacuum cleaner or a medium stiff
brush.
fRemove stains and spots with Porsche stain
remover.
To protect carpets, the Porsche range of accesso-
ries includes mats of the correct size and with the
appropriate fastening.
Warning!
Risk of an accident resulting in serious per-
sonal injury or death.
fAlways check the movement of the pedals be-
fore driving and make sure that they are not ob-
structed by a floor-mat or any other object.
fSecure the floor-mat to prevent it from sliding
into positions that could interfere with the safe
operation of your vehicle - do not install them
loosely in the vehicle.
Your Porsche dealer will be glad to offer you nonskid floor-mats of the correct size.
Cleaning fabric liningsfFabric linings on pillars, convertible top liner
and sun blinds, etc. must be cleaned only
using suitable cleaning agents or a suitable dry
foam and a soft brush.

248
Practical Tips, Emergency Service
Wheel Bolts
Danger!
Risk of wheel bolt breakage and wheel sepa-
ration, resulting in serious personal injury or
death.
fFollow all instructions concerning wheel bolts. fAlways clean the wheel bolts before fitting.
fApply a thin coat of Optimoly TA (aluminum
paste) on the thread and between the bolt head
and movable spherical cap ring (arrows).
The bearing surface of the spherical cap
facing the wheel must not be greased.
fReplace damaged wheel bolts.
Only use the Original Porsche wheel bolts spe-
cially designed for this vehicle type.
Tightening torque Tightening torque of wheel bolts:
96 ftlb./130 Nm
Wheel Securing Bolts If the wheels have to be removed at the workshop,
please do not forget to hand over the wrench
socket for the wheel securing bolts along with the
car key.
The wrench socket for the wheel securing bolts is
in the tool box.
To loosen or tighten the wheel bolt with anti-theft
protection, a wrench socket with the appropriate
coding must be used between the wheel bolt and
the wheel-bolt spanner.
fWhen positioning the wrench socket, ensure
that it engages fully in the teeth of the wheel
bolt.

Practical Tips, Emergency Service
249
Changing a wheel
Warning!
Risk of serious personal injury or death. The
car may slip off the jack.
fMake sure that no one is in the vehicle when
jacking up and changing a wheel.
fAlways place the car on stable supports if work
has to be carried out under the car.
Risk of damage to the brake discs of the
Porsche Ceramic Composite Brake (PCCB).
fAlways screw in both assembly aids when changing a wheel.
Note
The tools required for changing a wheel (e.g. jack,
wheel bolt wrench, assembly aids) are not sup-
plied with the car.
Your authorized Porsche dealer will be pleased to
advise you.1. Apply the handbrake fully and engage 1st gear
or PDK selector-lever position P and remove
the ignition key.
2. Switch on the hazard warning lights if neces-
sary.
3. Secure the car against rolling away, e.g. by
means of wedges under the wheels on the op-
posite side.
This is particularly important on slopes.
4. Slightly slacken the wheel bolts of the wheel to
be changed.
5. Lift the car only at the specified jacking points.
6. Raise the car until the wheel lifts off the
ground.
Please see the chapter “LIFTING THE VEHICLE
WITH A LIFTING PLATFORM OR GARAGE LIFT”
on Page 254.
7. Remove 1 or 2 wheel bolts (see respective
illustration).
8. Screw in assembly aids instead of the wheel
bolts.
Screw in assembly aid for vehicles without Porsche
Ceramic Composite Brake9. Remove the remaining wheel bolts.
Note on operation
fTo remove or mount the spacers:
Please see the chapter “SPACERS 911
CARRERA, 911 CARRERA S” on Page 255.

262
Practical Tips, Emergency Service
Battery care fEnsure that battery is securely mounted.
fKeep terminals and connections clean and
properly tightened.
Corrosion can be prevented by coating the ter-
minals and connections with petroleum jelly or
silicone spray.
fEnsure that vent caps are securely tightened to
prevent spillage. Checking the electrolyte fluid level
The acid level should be checked more frequently
by a qualified specialist workshop during the sum-
mer months and in predominantly warm countries.
Battery charging
Automotive batteries loose their efficiency when
not in use.
The charge available in your battery can be meas-
ured with a battery hydrometer.
We recommend that the battery voltage be tested
by your authorized Porsche dealer who has the ap-
propriate equipment.
If the car is not driven for prolonged periods, the
battery must be charged at least every 6 weeks.
A discharged battery allows rapid formation of sul-
fates, leading to premature deterioration of the
plates.
Warning!
Hydrogen gas generated by the battery
could cause an explosion, resulting in
serious personal injury or death.
fCharge battery in a well ventilated area.
fNever charge a frozen battery. It may explode
because of gas trapped in the ice. Allow a fro-
zen battery to thaw out first.
fIf you get electrolyte, which is an acid, in your
eyes or on your skin, immediately rinse with
cold water for several minutes and call a doc-tor. Slow battery charging
Your authorized Porsche dealer will be pleased to
advise you about a suitable charger.
1. Always observe the instructions of the charger
manufacturer.
Depending on the type of charger, the battery
may have to be disconnected.
In this case, always disconnect the negative
lead first, and then the positive lead – risk of
short circuit!
Reconnect the leads in reverse order.
2. Before charging, cold batteries must be
warmed up indoors.
3. Frozen batteries must be thawed out first
before being charged.
4. When charging, ensure that there is adequate
ventilation.
5. Connect the charger to the battery.
Only plug into the mains and switch the
charger on when it is connected up correctly.
6. Switch on the charger.
7. After charging, switch off the charger first and
then disconnect it.
fPlease see the chapter “PUTTING VEHICLE
INTO OPERATION” on Page 263.

Practical Tips, Emergency Service
271
3. Place socket wrench (tool kit) on the unlocking
spindle.
The handle of the wrench should point horizon-
tally to the rear.
4. Turn socket wrench approx. 180° A. The
headlight is unlocked and pushed forward
slightly during this process.
5. Turn socket wrench back until it is pointing
vertically downward B and leave in position.
6. The headlight is now unlocked and can be
pulled forward out of the fender.
Installing1. Insert headlight into the guide rails and push
fully into the fender.
2. Push headlight to the rear and at the same
time turn the socket wrench until it points
horizontally to the rear C.
The headlight locking device must perceptibly
and audibly engage.
3. Insert the rubber plug into the unlocking
opening and secure the carpet.
Check the function of all lights.
Low beam, high beam and additional high
beamOpening the lid of the headlight housing
1. Unscrew the 4 screws A.
2. First lift release tab B, then push both release
tabs C upwards and take off lid.

276
Practical Tips, Emergency Service
Changing bulb for side marker light1. Remove the cap in the wheel housing liner with
a screwdriver.
2. Insert the screwdriver into the opening in the
wheel housing liner parallel to the turn signal
housing (in direction of travel).
By pressing with the screwdriver, disengage
the securing spring of the turn signal housing.3. Swivel out the indicator light and undo bulb
holder (bayonet lock).
4. Remove the bulb from the holder and replace
it. Insert holder.
Check operation of the light.
5. Insert the turn signal’s retaining lugs A into the
side section at the front.
Push in turn signal until the securing spring B
is felt to engage.
6. Press the cap into the wheel housing liner.