engine PORSCHE 911 CARRERA 2005 5.G Workshop Manual

144
Shifting Gears
Manual Transmission, ClutchThe positions of the gears are shown on the shift
diagram on the gearshift lever.
Warning!
Risk of accident.
fDo not obstruct the pedal travel with floor mats
or other objects.
Nonskid floor mats of the correct size are
available at your authorized Porsche dealer.To avoid damage to the clutch and transmis-
sion:
fAlways depress the clutch pedal fully when
changing gears. Make sure that the gearshift
lever is completely engaged.
fOnly shift into reverse when the car has come
to a complete stop.
fWhen shifting gears, always ensure that the
clutch pedal is fully depressed and the gear
has fully engaged.
fSelect reverse only when vehicle is stationary.
fSelect an appropriately low gear on upward
and downward slopes.
This will ensure optimum use of engine power
and engine braking.
When reverse gear is selected and the ignition is
on, the backup lights are illuminated.
Permitted engine speedfYou should change into a higher gear before
the needle reaches the red mark on the ta-
chometer, or ease off the accelerator.
If the red zone is reached during acceleration, fuel
feed is interrupted.
Caution!
Risk of engine damage (overrevving) when
shifting down to a lower gear.
fTake care not to exceed the maximum permit-ted engine speed when shifting down.

Shifting Gears
145
Tiptronic SThe Porsche Tiptronic is a five-speed transmission
with an “automatic” and a “manual” selection
mode.
In automatic selection mode (selector lever po-
sition D), gear changing is automatic.
You can change temporarily from automatic to
manual mode using the rocker switches on the
steering wheel.
In manual selection mode (selector lever posi-
tion M), you change gear using the rocker switch-
es on the steering wheel.
You can change between selector lever position D
and M as you wish while driving.
Note
Take care not to operate the rocker switches on
the steering wheel inadvertently in either auto mat-
ic or manual mode, thereby triggering undesired
gear changes.Keylock positionThe ignition key can be withdrawn only in selec-
tor lever position P.
Changing the selector lever positionThe selector lever is locked with the ignition key
withdrawn.
The selector lever can be moved from position P
or N only with:
– The ignition switched on
– The brake pedal pressed and
– The release button pressedRelease button
The release button (arrow) in the selector lever
prevents unintentional gear changes.
The release button must be pressed when shifting
to position R or P.
StartingThe engine can be started only if the brake pedal
is depressed and the selector lever is in position
P or N.Moving offfOnly select the desired position for moving off
(D, M or R) when the engine is idling and the
brake pedal is depressed.
fSince the vehicle creeps when in gear, do not
release the brake until you want to move off.
fAfter selecting a gear, do not accelerate until
you can feel that the gear is engaged.

146
Shifting Gears
Indicator for selector lever position and
engaged gearWhen the engine is running, the selector lever po-
sition and engaged gear are indicated.If the selector lever is between two positions:
– The corresponding selector lever position in
the instrument cluster flashes for two seconds
and
– The warning “Selector lever not engaged” ap-
pears in the on-board computer.
fEngage the selector lever correctly.
– The selector lever position is displayed imme-
diately after the correct position has been de-
tected.
– The current gear is shown after a brief
detection period.If there is a fault in the transmission:
–The 4th gear display flashes.
– The warning “Tiptronic emergency run” ap-
pears on the on-board computer.
Please observe the chapter “REDUCED DRI-
VING PROGRAM” on Page 150.
fHave the fault remedied at an authorized
Porsche dealer.

Shifting Gears
147
Selector Lever PositionsP – Parking lockfEngage parking lock only when vehicle is sta-
tionary.
fEngage parking lock after applying the hand-
brake and release it before releasing the hand-
brake.
The ignition key can be withdrawn only in selec-
tor lever position P.R – Reverse gearfSelect only if car is stationary and the brake is
applied.N – NeutralSelector lever position N must be selected for
towing or in car washes, for example.
fOnly select the desired position for moving off
(D, M or R) when the engine is idling and the
brake pedal is depressed.
D - Automatic selection modeSelect position D for “normal” driving. The gears
are shifted automatically according to the acceler-
ator position and speed.
Depending on the way the vehicle is driven and on
the resistance (e.g. uphill), the gear-changing
points are shifted towards higher or lower engine-
speed ranges.
The accelerator position, driving speed, engine
speed, longitudinal and lateral acceleration and
the road profile all have an influence on the gear-
changing characteristic.
Unwanted upward shifts, e.g. before bends, are
prevented by swiftly releasing the accelerator ped-
al.
Depending on lateral acceleration, upward chang-
es on bends are not made until the engine-speed
limit is reached.
Under braking, and depending on the amount of
deceleration, the Tiptronic changes down earlier.
For subsequent cornering, the right gear is en-
gaged when pressure is applied to the brakes be-
fore the bend. The bend is taken in the right gear,
and when you accelerate out of the bend you do
not have to shift down.Sport mode switched on
fPlease observe the chapter “SPORT MODE” on
Page 64.
If the Sport mode program is switched on, Tiptron-
ic switches to a sporty gear-changing map and
shortens the shifting periods.
Deceleration downshifts are commenced earlier.
Downshifts are already carried out in the case of
slight decelerations, even at higher engine
speeds.
Driving off
In 2nd gear, the vehicle moves off with the throt-
tle only slightly open.
Move off in 1st gear with the throttle open wider
or when the engine is cold.

148
Shifting Gears Shifting gears on the steering wheel
With the rocker switches on the steering wheel,
you can change temporarily from automatic
selection mode D to manual mode M.
Example:
– Shifting down before bends and on entering
built-up areas.
– Shifting down on downward slopes
(engine braking).
– Shifting down for brief spurts of acceleration.
– Selecting 1st gear for starting off.
Manual selection mode remains engaged:
– for cornering (depending on the lateral
acceleration) and overrunning,
– when the vehicle is stationary
(e.g. at a junction).
The system leaves manual selection mode:
– automatically after approx. 8 seconds
(unless cornering or overrunning),
– if you depress the accelerator for kickdown,
– after moving off.Temporary change-down
Conditions:
Speed is higher than approx. 33 mph (54 km/h).
fRapid acceleration.
The Tiptronic temporarily changes to the
sportiest gear-changing map, i.e. to the high-
est possible gear-changing points.
Correspondingly, the transmission shifts down
immediately by one or two gears.
Ending the function:
fRelease the accelerator markedly
(by approx. 25%).
Kickdown
The kickdown function is active in selector lever
position D, even if you temporarily change to man-
ual mode M using the rocker switches on the
steering wheel.
fFor optimum acceleration, e.g. when overtak-
ing, depress the accelerator pedal beyond the
full-throttle point (kickdown).
The transmission shifts down depending on the
speed of travel and engine speed.
Upward shifts occur at the highest possible engine
speeds.
These gear-changing speeds remain active until
the accelerator is released to approx. 80% of the
full-throttle position.
M - Manual selection modeThe currently selected gear is retained when you
change from D to M.
If you change from M to D, the gear-changing map
suitable for your current driving style is selected
and the appropriate gear is chosen.
Warning!
The kickdown function is not active in manual
selection mode “M”.
fTherefore shift down manually when accelerat-ing (e.g. to overtake).

Shifting Gears
149
Two rocker switches in the upper steering-wheel
spokes let you comfortably and reliably select the
five forward speeds.
Shifting up
fPress upper part (+) of a rocker switch.
Shifting down
fPress lower part (–) of a rocker switch.
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 will not be executed by
the controller.
You can change down two gears by quickly press-
ing the rocker switches twice.
If the engine-speed limit is reached, an automatic
upward shift is performed or, just before idling
speed is reached, a downward shift is performed.
Select an appropriately low gear on upward and
downward slopes.
This will ensure optimum use of engine power and
engine braking.PSM switched off and/or Sport mode
switched on
fPlease observe the chapter “PORSCHE STABI-
LITY MANAGEMENT (PSM)” on Page 65.
fPlease observe the chapter “SPORT MODE” on
Page 64.
If the PSM is switched off and/or Sport mode is
switched on, an automatic upshift does not occur
when the engine speed limit is reached.
Cancelling upshift suppression
This restriction can be cancelled for one gear
change by depressing the accelerator to kick-
down. If, for example, the engine speed limit is
reached during overtaking and the automatic up-
shift does not occur, the transmission in this case
shifts up by accelerating to kickdown.
fDepress the accelerator pedal beyond the full-
throttle point (kickdown).Manual mode failure
If manual mode fails, the control electronics
switch to automatic mode. In this event, the instru-
ment cluster will display selector lever position D.
fHave the fault remedied at an authorized
Porsche dealer.

150
Shifting Gears
StoppingfFor a brief stop (e.g. at a traffic light), leave the
selector lever in drive position and hold the ve-
hicle with the brake pedal.
fFor a longer stop with the engine running, se-
lect position N (neutral) and hold vehicle in po-
sition with the foot brake.
Select lever position D only when the foot
brake pedal is depressed.
fDo not hold the car on a slope using the
accelerator. Use the brake pedal or the hand-
brake instead.
fBefore leaving the vehicle, always apply the
handbrake and move the selector lever to po-
sition P.
ParkingfGo easy on the accelerator!
fWhen parking or maneuvering 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 the
occurrence of gear changes that could cause
wheelspin.Tow-starting, towingfPlease observe the chapter “TOWING” on
Page 259.Reduced driving programA transmission fault is indicated by the following
symptoms:
–The 4th gear display on the instrument clus-
ter flashes.
– The warning “Tiptronic emergency run” ap-
pears on the on-board computer.
– The transmission no longer shifts.
Warning!
Reverse gear lock monitoring is disabled in
the emergency running program.
Damage to the vehicle may result as well as
loss of control, if the vehicle is moving for-
ward fast enough to cause rear wheel lockup.
fDo not shift into R while the vehicle is moving forward.
Proceed as follows in the event of a transmission
fault:
1. Stop in a safe place.
2. Move selector lever to position P, switch the ig-
nition off and wait for 10 seconds.
3. Start the engine.
2nd gear in selector position D and reverse
gear R are now available.
4. Have the fault seen to immediately at an au-
thorized Porsche dealer.

152
Mobile Roofs
Lifting/Sliding Roof
Warning!
Risk of injury when operating or automatical-
ly closing the lifting/sliding roof.
fTake care to ensure that nobody can be injured
when the lifting/sliding roof is operated.
fAlways withdraw the ignition key when leaving
the vehicle. Uninformed persons (e.g. children)
could injure themselves by operating the lift-
ing/sliding roof.
fIn case of danger, release the button immedi-
ately and operate the lifting/sliding roof in the opposite direction.
Readiness for operation– When the ignition is switched on (engine
switched on or off) or
– With doors closed and ignition key withdrawn,
but only until a door is first opened.
A - Opening the lifting/sliding rooffPress rear of rocker switch A until lifting/slid-
ing roof reaches the desired position.
One-touch operation
fTouch rear of rocker switch A.
Lifting/sliding roof opens to its end position.
Stop it in any position by touching any button.
Note
The lifting/sliding roof opens until it reaches the
b e s t p o s i t i o n f r o m t h e p o i n t o f v i e w o f n o i s e . I t c a n
be opened fully, however, if you press the rocker
switch again.

156
Mobile Roofs
Convertible Top Brief operating instructions can be found on the
back side of the driver’s sun visor.
fPlease observe the chapter “CAR CARE IN-
STRUCTIONS” on Page 198.
Warning!
When opening or closing the convertible top,
serious personal injury may occur if a per-
son’s body parts are near or in the way of the
convertible top mechanism’s moving parts.
fMake absolutely sure that nobody can be in-
jured by the convertible-top mechanism or the convertible-top compartment lid.
Do not operate convertible top:
– At temperatures below 32°F (0°C).
– When one side of the car is on a curb, a hoist
or a jack.
– When items of luggage or other objects hinder
the convertible top movement.
– With the rollbars extended.fAvoid frequent operation of the convertible top
with the engine off; the vehicle battery would
be unintentionally discharged rapidly.
fDrive only with the convertible top fully open or
closed (end positions).
fWhen opening or closing the convertible top,
ensure there is sufficient clearance above the
convertible top (e.g. in the garage).
fTo prevent damp stains and abrasions, only
open the convertible top in a dry, clean state.
fPark your car in the shade whenever possible,
as the fabric, rubber material and color can be
harmed by long exposure to sunlight.
fThe convertible top may only be actuated dur-
ing driving on even surfaces.
fThe convertible top must not be used with
strong counter wind (over approx. 50 mph/
80 km/h).
Door windows and side windows The side windows are lowered automatically when
the convertible top is opened. The door windows
close automatically if convertible top operation is
not interrupted when the convertible top reaches
its final position.
When the door windows are closed, the rear side
windows can also be closed.
When opening the door windows, the rear win-
dows open automatically.
The side windows are lowered automatically when
the convertible top is closed. All windows close
automatically if convertible top operation is not in-
terrupted when the convertible top reaches its fi-
nal position.

Mobile Roofs
157
Preconditions for operation of the
convertible top – The ignition must be switched on
(engine running or off),
– the engine compartment lid must be closed,
– the speed must be below approx. 30 mph
(50 km/h).
If this maximum speed is exceeded, the open-
ing/closing procedure of the convertible top
will be interrupted.
Warning!
Risk of injury and damage when operating
the convertible top.
fMake absolutely sure that nobody can be in-
jured by the convertible-top mechanism or the
convertible-top compartment lid.
fBefore opening the convertible top, make sure
that there are no objects behind the rear seats.
fKeep the lids of the make-up mirrors in the sun
visors closed when closing the convertible top.
fIn order to abort convertible top operation in
the event of danger, immediately release the rocker switch.
Opening convertible topfPull the rocker switch back and hold without in-
terruption until the convertible top is in the final
position or until the door windows are in the de-
sired position.
The message on the on-board computer goes
out.
In case of danger, release the rocker switch.
Convertible top operation stops.
Closing convertible topfPush the rocker switch forward and hold
without interruption until the convertible top is
in the final position or until the door windows
are in the desired position.
The message on the on-board computer goes
out.
In case of danger, release the rocker switch.
Convertible top operation stops.
f f f