2005 PORSCHE 911 CARRERA Battery

Practical Tips, Emergency Service
237
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
Generally, the electrolyte level must be checked
more often in summer than in the winter, and more
often when driving long distances.
fWhen adding water, use only clean containers.
In no case may alcohol (e.g. window cleaner
residues) be permitted to enter the battery.
fUnscrew and open the filler vent caps of each
cell.
With the car on a level surface, the fluid level
should meet the indicator mark in each cell.
fIf necessary, top up with distilled water.
Do not use acid.
Only fill up to the mark, otherwise the electro-
lyte will overflow when the battery is being
charged and cause damage. 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 Porsche dealer who has the appropriate
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.
f f f

238
Practical Tips, Emergency Service
Warning!
Hydrogen gas generated by the battery
could cause an explosion, resulting in severe
personal injuries.
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
1. Pay attention to all warnings and follow instruc-
tions that come with your battery charger.
2. When charging, ensure adequate ventilation.
3. Remove battery.
Please observe the chapter “REMOVING THE
BATTERY” on Page 240.
4. All vent caps should be open.
The fluid level should meet the indicator mark
in each cell.
5. Ensure that charger is switched off – danger of
short circuit!
6. Connect charger cables.
Charger cables must be connected
POSITIVE (+) to POSITIVE (+) and
NEGATIVE (–) to NEGATIVE (–).
7. Switch on charger.
Normally, a battery should be charged at no
more than 10 percent of its rated capacity.
Rated capacity of the battery in your vehicle is
listed on the battery housing.
8. After charging, turn off charger and disconnect
charger cables.
9. Tighten the vent caps and reinstall battery.
Please observe the chapter “INSTALLING THE
BATTERY” on Page 241.
Winter operation The capacity and ability of the battery to store
power decreases at low outside temperatures.
Additionally, more power is consumed while start-
ing, and the headlights, heater, rear window de-
fogger, etc., are used more frequently.
fLet your Porsche dealer test the battery’s
capacity before winter sets in.
The battery will discharge more quickly if your ve-
hicle is not driven on a daily basis over a distance
of several miles. The more often you drive your ve-
hicle, and the longer the distance driven on each
trip, the more opportunity the vehicle’s charging
system will have to recharge the batteries.

Practical Tips, Emergency Service
239
Replacing battery The service life of the battery is subject to normal
wear; it depends greatly on care, climatic condi-
tions, and driving conditions (distances, loads).
fOnly use an original Porsche battery, with the
correct part number, as a replacement.
fPlease observe the disposal instructions for
batteries.
Putting vehicle into operationAfter the battery is connected or after an exhaus-
tively discharged battery is charged, the multi-
functional PSM light lights up on the instrument
panel and a message appears on the on-board
computer to indicate a fault.
This fault can be remedied with a few simple
steps:
1. Start the engine.
2. With the vehicle stationary, perform a few
steering movements to the left and right and
then drive a short distance in a straight line
until the multifunctinal PSM light goes out and
the message on the on-board computer
disappears.
3. If the warnings do not disappear, then:
Drive carefully to the nearest authorized
Porsche dealer.
Have the fault remedied.
4. After the warnings disappear:
Stop the vehicle in a suitable place.
fPerform adaptation of the power windows:
Please observe the chapter “STORING END
POSITION OF THE WINDOWS” on Page 29.Ignition key/ignition lock
fDo not insert the ignition key into the ignition
lock if the vehicle battery is discharged.
The ignition key can no longer be removed.
The key cannot be removed until the vehicle elec-
trical system is supplied with power again.
fPlease observe the chapter “EMERGENCY UN-
LOCKING OF THE LUGGAGE COMPARTMENT
LID” on Page 235.
fPlease observe the chapter “EMERGENCY
STARTING WITH JUMPER CABLES” on
Page 242.
f f f

240
Practical Tips, Emergency Service
Removing the battery The required tool is in the tool kit.
The battery is located in the luggage compart-
ment under a black plastic lid.
Warning!
Risk of damage to alternator and electronic
control units.
fDo not disconnect the battery while the engine
is running.
This also applies to cars equipped with a bat-
tery main switch.
fNever drive the car with a disconnected bat-
tery.
Risk of caustic burns from escaping acid.
fKeep vent caps on to avoid spillage.
fDo not tilt the battery when removing and in-stalling it. 1. Switch off engine and all electrical loads.
2. Open turn-locks A.
Remove plastic lid.
3. Pull off central vent hose C.
Danger!
Risk of short circuit and explosion.
fImportant: disconnect the negative (–) ground wire first, and then the positive (+) cable.4. Unscrew fastening screw B.
5. Remove battery.

Practical Tips, Emergency Service
241
Installing the battery 1. Put battery in and push it all the way to the
stop.
2. Screw in fastening screw B.
Danger!
Risk of short circuit and explosion.
fImportant: connect the positive (+) cable first, and then the negative (–) ground wire.
3. Push on central vent hose C.
4. Fit plastic lid. Lock turn-locks A.
Replacing the remote-control battery The battery should be changed when the range of
the radio remote control becomes smaller or
when the light-emitting diode no longer flashes
when the remote control is operated.1. Using your finger nail or a small screwdriver,
carefully lift off the cover of the key grip
(arrow).
2. Replace the battery (paying attention to the
polarity).
Replacement battery – Lithium CR 2032,
3volts
3. Replace the cover and press together firmly.
Please observe the disposal instructions for
batteries.
Note
fPlease dispose batteries in compliance with
any and all government regulations.

242
Practical Tips, Emergency Service
Emergency Starting with Jumper
Cables If the battery is discharged, e.g. in winter or after
the car has been parked for a long time, the bat-
tery of another car can be used for starting with
the help of jumper cables.
Make sure the voltage of both batteries is the
same. Both batteries must be 12 volt types.
The capacity (Ampere hours, Ah) of the booster
battery must not be substantially less than that of
the discharged battery.
The discharged battery must be correctly con-
nected to the vehicle’s electrical system.
fPlease observe the chapter “BATTERY” on
Page 236.
fPlease observe the chapter “EMERGENCY UN-
LOCKING OF THE LUGGAGE COMPARTMENT
LID” on Page 235.
Note
fDo not try to start the car by pushing or tow-
ing. Damage to the catalytic converters and
other components of the car may result.
Warning!
Risk of damage and serious personal injury
due to short circuit.
fUse only jumper cables of adequate diameter
cross-section and fitted with completely insu-
lated alligator clips.
fFollow all warnings and instructions of the
jumper cable manufacturer.
fWhen connecting jumper cables, make sure
that they cannot get caught in any moving
parts in the engine compartment.
The jumper cables must be long enough so
that neither vehicles nor cables touch another.
fThe vehicles must not be in contact, otherwise
current might flow as soon as the positive ter-
minals are connected.
fThe cable clamps must not be allowed to con-
tact each other when one end of the jumper ca-
bles are connected to a battery.
fEnsure that tools or conductive jewelery (rings,
chains, watch straps) do not come into contact
with the positive jumper cable or the positive
battery post.
fImproper hook-up of jumper cables can ruin
the alternator. Danger of caustic burns.
fDo not lean over the battery.
Danger of gas explosion.
fImproper use of booster battery to start a
vehicle may cause an explosion, resulting in
severe personal injuries.
fKeep sources of ignition away from the bat-
tery, e.g. open flame, burning cigarettes or
sparking due to cable contact or welding work.
fA discharged battery can freeze even at
23°F/–5°C.
Before connecting jumper cables, a frozen bat-
tery must be thawed out.

Practical Tips, Emergency Service
243
Connect jumper cables in the following
sequence:
Always observe the sequence below:
1. Connect the positive lead (red) to the
positive terminal of the discharged battery
first, then connect it to the positive terminal of
the donor battery.
2. First connect the negative cable (black) to
the negative terminal of the donor battery, then
connect it to a suitable grounding point on the
vehicle with the discharged battery.
This grounding point must lie as far as possible
from the battery.
For example, a solid metal part or the engine
block are suitable grounding points.
If no suitable grounding points are to be found
on either vehicle, the negative cable must
carefully be connected directly to the negative
terminal of the battery.
If a suitable grounding point is to be found only
on the donor vehicle, the negative cable must
first be connected to the terminal of the
discharged battery, then to the grounding point
of the donor vehicle.
3. Run the engine of the donor car at a higher
speed.4. Start the engine.
An attempted start using jumper cables should
not last more than 15 seconds. Then allow a
waiting period of at least one minute.
Note
Before disconnecting the jumper cables, electrical
loads such as the heated rear window and the
heating fan blower should be switched on (the ve-
hicle’s lights must not be switched on). This reduc-
es voltage peaks which may occur when discon-
necting the jumper cables.
With the engine running, remove both jumper ca-
bles in reverse order.

262
Vehicle Identification, Technical Data
Vehicle Identification When ordering spare parts or making inquiries,
please always quote the vehicle identification
number. Vehicle data bankThe vehicle data bank is attached to the inside of
the “Maintenance” booklet.
It contains all important data about your vehicle.
Note
This data bank cannot be re-ordered if it is lost or
damaged.
This label contains the following information:
1. Vehicle Identification No.
2. Type/Type description
3. Engine code/Transmission code
4. Paint No./Interior
5. Optional equipment
Vehicle identification number In accordance with Federal Safety Regulations,
the vehicle identification number of your car is lo-
cated at the bottom left of the windshield frame
and can be seen from the outside.
The vehicle identification number is in the luggage
compartment under the battery cover and at the
bottom left behind the windshield.
Removing the battery cover
fPlease observe the chapter „BATTERY“ on
page 236.
Safety compliance stickerThe safety compliance sticker is your assurance
that your new Porsche complies with all applicable
Federal Motor Vehicle Safety Standards which
were in effect at the time the vehicle was manufac-
tured.
The sticker also shows the month and year of pro-
duction and the vehicle identification number of
your car (perforations) as well as the Gross Vehi-
cle Weight Rating and the Gross Axle Weight Rat-
ing.