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Porsche Cayenne (2010 year). Manual - part 10

Brakes

Brake system function

Parking Brake warning

light USA

f Make it a habit to check the operation of your

Your Porsche is equipped with a power assisted

Parking Brake warning

brakes before driving.

hydraulic dual circuit brake system with disc

light Canada

brakes at the front and rear.

Keep in mind that the braking distance increases

Both circuits function independently. One brake

The warning lights will go out after the parking

very rapidly as the speed increases. At 60 mph

circuit operates the front left and rear right wheel

brake is fully released.

(100 km/h), for example, it is not twice but four

and the other operates the front right and rear left

The warning lights are not an indicator that the

times longer than 30 mph (50 km/h). Tire traction

wheel.

parking brake is fully applied; it is only intended to

is also less effective when the roads are wet or

be a warning to release the parking brake before

slippery.

If one brake circuit has failed, the other will still

driving the car.

operate. However, you will notice an increased

f Therefore, always maintain a safe distance

pedal travel when you apply the brakes.Failure of

from the car in front of you.

one brake circuit will cause the stopping distance

Caution!

to increase.

A partially engaged brake will overheat the

Vehicles without Porsche Ceramic

rear brakes, reduce their effectiveness and

Composite Brake (PCCB)

Warning!

cause excessive wear.

Even though the brake discs consist of alloyed

Risk of an accident, resulting in serious per-

f Release the parking brake fully.

grey cast iron, they will unavoidably start to cor-

sonal injury or death.

rode if your car is parked for an extended period.

In the unlikely event of hydraulic failure of

f When parking your car, press down firmly on

The brakes will tend to “rub” as a result.

one brake circuit:

the foot pedal.

The nature, extent and effects of corrosion

f Push the brake pedal down firmly and hold it in

f Move the Tiptronic selector lever to “P”

depend on the amount of time the vehicle was

that position. A mechanical linkage activates

(Tiptronic) or move the gearshift lever to

parked, whether road salt or grit was spread and

the second circuit, and you will be able to bring

reverse or first gear (Manual transmission).

whether grease-dissolving agents were used in

the vehicle to a stop.

car washes.

f On hills also turn the front wheels towards the

If the braking comfort is noticeably impaired, we

f After bringing your vehicle to a complete stop,

curb.

recommend having the brake system checked by

avoid driving the vehicle and instead have it

experts at an authorized Porsche dealer.

towed to the nearest authorized Porsche

dealer for repair.

Driving and Driving Safety

163

Brake system warning light

Brake pedal

Warning!

You can check the functionality of the brake sys-

To avoid overheating and premature wear of

Warning!

tem warning light by switching the ignition to the

the brakes:

“On” position and verifying that the warning light

Risk of an accident, resulting in serious per-

f

Before descending a steep grade, reduce

illuminates.

sonal injury or death.

speed and shift the transmission into a lower

Any obstruction of the brake pedal could in-

gear to control speed.

Brake warning light USA

crease the stopping distance.

f

Do not “ride the brakes” by resting your foot on

Brake warning light

f Always check the movement of the brake pedal

the pedal when not intending to apply brake

Canada

before driving and make sure that it is not

pressure.

obstructed by a floor mat or any other object.

The warning light in the instrument panel lights up.

f

Do not hold the pedal down too long or too

A message will be displayed on the multi-purpose

f Secure the floor mat to prevent it from sliding

often. This could cause the brakes to get hot

display of the instrument panel if the brake fluid

into positions that could interfere with the safe

and not function properly.

level is too low, or (if the brake pedal travel has in-

operation of your vehicle.

creased) one of the two brake circuits has failed.

Your Porsche dealer will be glad to offer you

floor mats of the correct size including a

A greater braking pressure will be required, stop-

securing possibility.

ping distances will be longer and the braking

behavior will change, particularly in curves.

Note

With correctly adjusted brakes and a correctly

In case one of the two brake circuits fails,

working brake system, the pedal travel to the

increased pedal travel is required to bring your

point of brake application should be 1-3/16 in. to

vehicle to a full stop.

1-9/16 in. (30 to 40 mm). Whenever the brake

pedal travel exceeds this value, have the brake

system checked.

164 Driving and Driving Safety

Brake booster

Brake wear

Brake pads and brake discs

The brake booster assists braking only when

Your car has excellent brakes, but they are still

Wear on the brake pads and brake discs depends

the engine is running.

subject to wear. The rate at which they wear

to a great extent on the driving style and the con-

depends on how the brakes are used.

ditions of use and therefore cannot be expressed

When the car is moving while the engine is not

in actual miles on the road.

running, or if the brake booster is defective, more

f Have the brake system inspected at the inter-

pressure on the brake pedal is required to bring

vals recommended in your Maintenance Book-

The high-performance brake system is designed

the car to a stop.

let.

for optimal braking effect at all speeds and tem-

peratures.

Moisture, road salt or grit on brakes affects

Brake system warning light

Certain speeds, braking forces and ambient

braking.

conditions (such as temperature and humidity)

Brakes will dry after a few cautious brake applica-

You can check the functionality of the brake sys-

therefore might cause the brakes to squeal.

tions.

tem warning light by switching the ignition to the

“On” position and verifying that the warning light

illuminates.

Warning!

Risk of an accident, resulting in serious per-

Brake wear warning message

sonal injury or death.

Driving through water may reduce the trac-

A warning message will be displayed on the multi-

tion. Moisture on brakes from road water, car

purpose display of the instrument panel if the

wash, or a coating of road salt or grit may

brake pads are worn, excessively.

affect braking efficiency.

f Do not continue to operate the vehicle.

f Cautiously apply brakes to test brakes after

Have your authorized Porsche dealer inspect

exposure to road water, etc.

or replace the brake pads.

f Please see the chapter “OVERVIEW OF

WARNING MESSAGES” on Page 149.

Driving and Driving Safety

165

New brake pads or linings

Warning!

f

Even though the brake discs consist of alloyed

grey cast iron, they will unavoidably start to

New brake pads have to be “broken in”, and there-

f Do not obstruct the pedal travel with floor mats

corrode if your car is parked for an extended

fore only attain optimal friction when the car has

or other objects.

period. The brakes will tend to “rub” as a

covered several hundred miles or km.

The brake booster is ready for operation only

result.

The slightly reduced braking ability must be com-

while the engine is running.

The nature, extent and effects of corrosion

pensated for by pressing the brake pedal harder.

If the engine is switched off or there is a defect in

depend on the amount of time the vehicle was

This also applies whenever the brake pads and

the brake booster, much greater force has to be

parked, whether road salt or grit was spread

brake discs are replaced.

applied to the pedal when braking.

and whether grease-dissolving agents were

used in car washes (not on vehicles with

f Please see the chapter “TOWING” on

Porsche Ceramic Composite Brake).

Page 342.

To prevent corrosion of the brake discs, “brake

In heavy rain, while driving through water or after

them dry” before parking the car (not on

leaving a car wash, the braking action may be

vehicles with Porsche Ceramic Composite

delayed and increased pressure may be required.

Brake).

If the braking comfort is noticeably impaired,

f For this reason, keep further back from the ve-

we recommend having the brake system

hicle in front and “dry” the brakes by applying

checked by experts at an authorized Porsche

them at intervals. Make sure that following traf-

dealer.

fic is not affected.

f

To relieve the braking system on downhill

After a long drive over salted or sanded roads, a

stretches, change down to a lower gear in

coating may form on the brake discs and pads

enough time to obtain engine braking.

that significantly reduces friction and thus braking

If engine braking is insufficient on steep

action.

stretches, operate the footbrake at intervals.

Continuous braking overheats the brakes and

reduces the braking effect.

f

Please see the chapter “BRAKE-FLUID LEVEL”

on Page 257.

166 Driving and Driving Safety

Warning!

Accelerating (e.g. to overtake)

Risk of accident while using cruise control in

Option 1

heavy traffic and consequent personal injury

or death, on twisting roads or under

f Increase the speed as usual with the accelera-

unfavorable road conditions (e.g. wintry or

tor.

wet conditions, varying road surfaces).

When you ease off the accelerator, the

previously stored value is set again.

f Do not use the cruise control under such

conditions.

Option 2

f Observe all local and national speed limits.

f Push operating lever upwards into position 3

until the desired speed is reached.

Risk of an accident, personal injury and loss

of control.

The speed reached is maintained and stored

when the operating lever is released.

f Do not reach through the steering-wheel

spokes while driving.

Option 3

f Push operating lever slightly upwards into

position 3 (a maximum of 10 times).

Switching cruise control readiness on

A - SET (Store speed)

The speed is increased by 1 mph (2 km/h),

1

- RESUME - Switch on/resume cruise control readiness

f Pull back the operating lever to position 1 until

each time the lever is pushed upwards.

(pull toward driver)

it clicks audibly into place.

2

- OFF - Interrupt (push away from driver)

Note on operation

3

-

+ SPEED - Accelerate (raise clockwise)

Cruise control readiness

4

-

- SPEED - Decelerate (lower counter-clockwise)

Cruise control operation is automatically interrup-

The green indicator light on the tacho-

ted if the speed is increased by more than approx.

Cruise Control

meter now indicates readiness.

16 mph (25 km/h) for longer than 20 seconds.

Cruise control maintains any selected speed

between 20 and 150 mph (30 and 240 km/h)

Maintaining and storing speed

without you having to use the accelerator.

The cruise control is operated with the operating

f Bring the car to the desired speed with the

lever on the steering wheel.

accelerator.

f Press button A.

The desired speed has now been stored.

Driving and Driving Safety

167

To avoid damage to the clutch and transmis-

Permitted engine speed

sion:

f You should change into a higher gear before

f Always depress the clutch pedal fully when

the needle reaches the red mark on the tacho-

changing gears. Make sure that the gearshift

meter, or ease off the accelerator.

lever is completely engaged.

If the red zone is reached during acceleration, fuel

f Only shift into reverse when the car has come

feed is interrupted.

to a complete stop

Caution!

Floor mats of the correct size and with the

appropriate fasteners are available from your

Risk of engine damage (overrevving) when

authorized Porsche dealer.

shifting down to a lower gear.

The positions of the gears are shown on the shift

f Take care not to exceed the maximum permit-

diagram on the gearshift lever.

ted engine speed when down-shifting.

f When shifting gears, always ensure that the

clutch pedal is fully depressed and the gear

has fully engaged.

Manual transmission, clutch

f Select reverse only when vehicle is stationary.

Warning!

f Select an appropriately low gear on upward

and downward slopes.

Risk of accident, resulting in serious perso-

This will ensure optimum use of engine power

nal injury or death.

and engine braking.

f Do not obstruct the pedal travel with floor mats

When reverse gear is selected and the ignition is

or other objects.

on, the reversing lights are lit.

Driving and Driving Safety

169

Release button

Tiptronic S

The release button (arrow) on the front side of the

The Porsche Tiptronic is a six-speed transmission

selector lever prevents unintentional gear chan-

and features an “automatic” and a “manual” gear-

ges.

shift mode.

The release button must be pressed when shifting

In automatic selection mode (selector lever po-

to position R or P.

sition D), gear changing is automatic.

Depending on the driving program, you can

The selector lever cannot be operated in the event

change temporarily from automatic to manual

of an electrical fault.

mode using the rocker switches on the steering

f Please see the chapter “SELECTOR LEVER

wheel.

EMERGENCY RELEASE” on Page 175.

In manual selection mode (selector lever

position M), you change gear using the rocker

Starting

switches on the steering wheel or by pushing the

selector lever forward or back.

The engine can be started only in selector lever

position P or N with the brake pedal pressed.

The functions of selector lever positions D and M

differ in the on-road program, High Range, and in

Changing the selector lever position

the off-road program, Low Range.

Moving off

You can change between selector lever positions

The selector lever is locked with the ignition key

f Select the desired position for moving off

D and M as you wish while driving.

withdrawn.

(D, M or R) only when the engine is idling and

The currently selected gear is retained if you

The selector lever can be moved from position P

when depressing the brake pedal.

change from D to M.

or N only with:

f Since the car creeps when in gear, do not re-

If you change from M to D, the gear-changing map

- The ignition switched on

lease the brake until you want to move off.

suitable for your current driving style is selected

and the appropriate gear is selected.

- The brake pedal pressed and

f After selecting a gear, do not accelerate until

you can feel that the gear is engaged.

- The release button pressed (arrow).

Note on operation

Take care not to operate the rocker switches on

the steering wheel inadvertently, thereby trigger-

ing undesired gear changes.

170 Driving and Driving Safety

Selector Lever Positions

D - Automatic selection mode (in the road

driving program)

P - Parking lock

f Use selector lever position D for “normal”

driving.

In selector lever position P, the driven wheels are

The gears are shifted automatically according

mechanically locked.

to the accelerator position and speed.

f Engage parking lock only when vehicle is

Depending on the way the vehicle is driven and on

stationary.

the resistance (e.g. uphill), the gear-changing

f Engage parking lock after applying the

points are shifted towards higher or lower engine-

parking brake and release it before releasing

speed ranges. Movement of the accelerator,

the parking brake.

driving speed, longitudinal and lateral acceleration

and the road profile all have an influence on the

f Always apply the parking brake before leaving

gear-changing characteristic.

the vehicle.

When PSM is switched off, transmission gear

The ignition key can be withdrawn only in selector

changes are done at higher engine speeds.

lever position P.

Unwanted upward shifts, e.g. before corners, are

Selector lever position

prevented by swiftly releasing the accelerator

R - Reverse

pedal.

Indicator for selector lever position and

Depending on lateral acceleration, upward

f Select reverse only if car is stationary and the

engaged gear

brake is applied.

changes on corners are not made until the engine-

speed limit is reached.

When the engine is running, the selector lever

position and engaged gear are indicated.

N - Neutral

During braking, and depending on the amount of

deceleration, the Tiptronic changes down earlier.

Selector lever position N must be selected for

For subsequent cornering, the right gear is

towing or in car washes, for example.

engaged when pressure is applied to the brakes

f Select the desired position for moving off

before the corner.

(D, M or R) only when the engine is idling and

when depressing the brake pedal.

Driving and Driving Safety

171

The manual selection mode remains engaged:

Shifting up

- For passing

f Press upper part (+) of a rocker switch A or

- Depending on lateral acceleration

f Push selector lever B forward in the M gate.

- When the vehicle is stationary (e.g. at a

Shifting down

junction).

f Press lower part (-) of a rocker switch A or

The system leaves manual selection mode:

f Push selector lever B back in the M gate.

- Automatically after around 8 seconds

Depending on driving speed and engine speed,

(unless car is subject to high lateral accelera-

you can shift up or down at any time. Gear

tion, is passing or stationary),

changes which would exceed the upper or lower

- if you depress the accelerator to kickdown.

engine-speed limit are not executed by the control

unit.

Kickdown

You can change down two gears by quickly pres-

The kickdown function is active in selector lever

sing rocker switches A or selector lever B twice.

position D.

If PSM is active and the engine-speed limit is

f For optimum acceleration, e.g. when overta-

M - Manual selection mode (in the on-

reached, an automatic upward shift is performed

king, depress the accelerator pedal beyond

road driving program)

or, just before idling speed is reached, a down-

the full-throttle point (kickdown).

ward shift is performed.

The transmission shifts down depending on the

Warning!

f Select an appropriately low gear on upward

speed of travel and engine speed.

The kickdown function is not active in manual

and downward slopes.

Upward shifts occur at the highest possible engine

selection mode “M”.

This will ensure optimum use of engine power

speeds.

The kickdown function cannot be used to

and engine braking.

These gear-changing speeds remain active until

downshift in manual selection mode “M”.

the accelerator is released to approx. 80% of the

If manual mode fails, the control electronics

full-throttle position.

f Therefore shift down manually when accelera-

switch to automatic mode.

ting (e.g. to overtake).

In this event, the instrument panel will display

Tip on driving

selector lever position D.

Unlike in the on-road driving program, an automa-

f To remedy the fault, please consult an

tic upshift is not performed in manual selection

authorized Porsche dealer.

mode M when the engine-speed limit is reached.

Driving and Driving Safety

173

M - Manual selection mode (in the off-

Shifting up

Stopping

road driving program)

f Press upper part (+) of a rocker switch A or

f For a brief stop (e.g. at a traffic light), leave the

Warning!

f Push selector lever B forward in the M gate.

selector lever in drive position and hold the

vehicle with the brake pedal.

The kickdown function is not active in manual

Shifting down

selection mode “M”.

f Do not hold the car on a slope using the acce-

f Press lower part (-) of a rocker switch A or

The kickdown function cannot be used to

lerator. Use the brake pedal or the parking

downshift in manual selection mode “M”.

f Push selector lever B back in the M gate.

brake instead.

f Therefore shift down manually when accelera-

Depending on driving speed and engine speed,

f Before leaving the vehicle, always apply the

ting (e.g. to overtake).

you can shift up or down at any time. Gear

handbrake and move the selector lever to

position P.

changes which would exceed the upper or lower

Tip on driving

engine-speed limit are not executed by the control

Tip on driving

unit.

The kickdown function is not active in selector

In selector lever positions D and M, the hillholder

lever position M.

You can change down two gears by quickly pres-

function makes it easier to move off from a stand-

Unlike in the road driving program, an automatic

sing rocker switches A or selector lever B twice.

still on an upward slope when the engine is run-

upshift is not performed when the engine-speed

The gear is changed down automatically just

ning. The driver does not have to apply the brake.

limit is reached.

before idle speed is reached.

f Please see the chapter “HILLHOLDER -

f Select an appropriately low gear on upward

MOVING-OFF ASSISTANT ON VEHICLES WITH

and downward slopes.

TIPTRONIC S” on Page 187.

This will ensure optimum use of engine power

and engine braking.

If manual mode fails, the control electronics

switch to automatic mode. In this event, the instru-

ment panel will display selector lever position D.

f To remedy the fault, please consult an

authorized Porsche dealer.

174 Driving and Driving Safety

Parking

Limp-home mode

f Go easy on the accelerator.

If there is a fault in the transmission:

f When parking or maneuvring in a small space,

- An X appears instead of the current gear

control the speed by careful use of the foot-

indicator on the multi-purpose display of the

brake.

instrument panel.

The transmission no longer shifts.

Driving in winter

f To remedy the fault, immediately consult an

authorized Porsche dealer.

In wintry road conditions it is advisable to take

steep inclines in manual mode M. This prevents

Warning!

the occurrence of gear changes that could cause

wheelspin.

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.

f Do not shift into R while the vehicle is moving

Selector lever emergency release

forward.

In the event of an electrical fault, the selector lever

lock in position P can be manually released (for

Tip on driving

towing the vehicle, for example).

3rd or 5th gear in selector position D and reverse

1. Fold up armrest.

gear R are now available and will allow you to

reach the nearest authorized Porsche dealer.

2. Remove key B from the lower storage tray

(underneath the rubber mat) in the center

f Please go to your authorized Porsche dealer

console.

as soon as possible.

Driving and Driving Safety

175

3. Undo screws A with key B.

6. Unplug plug connection D.

7. Press foam aside.

4. Remove trim mounting F.

8. Press locking lever E aside (to the left) using a

suitable object.

5. Lift trim C at rear and carefully pull it off.

9. Move selector lever to position N.

10.Reassemble in reverse order.

Danger!

Risk of loss of control, resulting in serious

personal injury or death.

f Ensure that the parking brake of the vehicle is

set and that vehicle does not move on its own.

176 Driving and Driving Safety

When the driving program is active, the power

Caution!

transmission and running-gear control systems

Risk of engine damage (overrevving). In the

are automatically adapted to the requirements for

Low Range program, the gear-shifting points

off-road or on-road driving.

are shifted towards lower engine-speed ran-

ges.

Selecting driving program

f Shift early to prevent overrevving the engine.

The particular driving program can be selected

using the rocker switch A.

Vehicles with Tiptronic S

The rocker switch A is located in the center con-

f When selecting the off-road driving program:

sole of the vehicle. It features a multi-step function

Reduce speed to below 9.3 mph (15 km/h) or

and can be operated in both directions.

stop vehicle.

f When selecting the on-road driving program:

Note on operation

Reduce speed to below 19 mph (30 km/h) or

The number of differential locks that can be enga-

stop vehicle.

ged in Low Range depends on the equipment of

your vehicle.

f Move Tiptronic selector lever to position N.

Driving Programs for On-Road and

Prerequisites for manual settings

Danger!

Off-Road Driving

Vehicles with manual transmission

Risk of accident, resulting in serious perso-

Two different driving programs with special power-

nal injury or death due to uncontrolled vehic-

transmission and running-gear control systems

f Stop the vehicle.

le movement. The Tiptronic selector lever is

(such as ABS, off-road ABS and PSM, etc.) are pro-

f Apply the brake.

blocked during the shifting procedure. Shif-

vided in your Porsche for realising the best possib-

ting when driving uphill can cause the vehicle

le driving dynamics combined with maximum safe-

f Put the gearshift lever in neutral.

to stand still or even roll backwards, if the

ty.

shifting procedure has not yet been comple-

- Low Range off-road driving program

ted. When driving downhill, the vehicle can

(with reduction)

accelerate unintentionally while shifting.

- High Range on-road driving program

f Increased brake readiness is required.

(without reduction)

Driving and Driving Safety

177

Tip on driving center differential lock

When the center differential lock C is fully enga-

ged, there is no longer any speed difference bet-

ween the front and rear axles. If, for example, both

wheels at the front axle lose traction on an icy

road or soft surface, the rigidly linked drive wheels

will permit the car to continue moving neverthe-

less.

Tip on driving rear-differential lock

When the rear differential lock D is fully engaged,

there is no longer any speed difference between

the two rear wheels. If, for example, one drive

wheel at the rear axle loses traction on an icy road

or soft surface, the rigidly linked drive wheels will

permit the car to continue moving nevertheless.

Note on operation

Selecting off-road driving program

A - High Range on-road driving program

(without reduction)

The rear differential lock can be engaged only

f Push rocker switch forward

B - Low Range off-road driving program

while the engine is running.

The vehicle becomes one step more suitable

(with reduction)

for off-road driving.

C - Center differential lock in Low Range is fully engaged

D - Rear differential lock in Low Range is fully engaged

Selecting on-road driving program

Display of the selected driving program

f Pull rocker switch to the rear

The vehicle becomes one step more suitable

The selected driving program is displayed by light-

for on-road driving.

emitting diodes next to the rocker switch (illustra-

tion).

Once the driving program has been selected, the

rocker switch springs back to home position.

The corresponding indicator lights on the instru-

ment panel and light-emitting diodes beside the ro-

cker switch flash several times during the shif-

ting process.

178 Driving and Driving Safety

Note on operation

-

PDCC (Porsche Dynamic Chassis Control) is

automatically set to Sport mode, and this

If the Low Range indicator light next to the rocker

further reduces the roll tendency of the

switch flashes rapidly after the ignition is swit-

vehicle.

ched on, there is a fault in the shifting system.

-

The air suspension automatically changes to

f Have the vehicle checked immediately.

the low level setting.

Please consult an authorized Porsche dealer.

-

The Tiptronic S transmission changes to a

Low Range indicator light

sportier shift strategy.

The gear-changing points are shifted to higher

If the Low Range indicator light next to the rocker

speed ranges. Upward shifts are initiated later,

switch flashes when you attempt to operate

and deceleration shifts are performed earlier.

rocker switch, then at least one condition for shif-

The vehicle moves off in 1st gear.

ting has not been met:

-

The electronic accelerator pedal reacts

sooner, and the engine is more responsive to

Vehicles with manual transmission

throttle inputs.

- Vehicle is not stationary.

-

Sporty engine tuning is activated.

– Brake is not pressed.

Sport Mode

f

For further information:

– Gearshift lever in not in neutral.

Please see the chapter “PORSCHE ACTIVE

Function

SUSPENSION MANAGEMENT (PASM)” on

Vehicles with Tiptronic S

The sports exhaust system is switched on and a

Page 193.

- Vehicle has exceeded or gone below the limit

sportier car set-up is obtained when Sport mode

f

Please see the chapter “PORSCHE DYNAMIC

speed.

is switched on.

CHASSIS CONTROL (PDCC)” on Page 194.

Interventions by the Porsche control systems are

- Tiptronic selector lever is not in position N.

intentionally shifted towards greater agility and

driving performance.

- PASM (Porsche Active Suspension Manage-

ment) is automatically changed to Sport mode,

resulting in a stiffer suspension setup.

Driving and Driving Safety

179

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