2004 PORSCHE CAYENNE brake sensor

Driving and Driving Safety
183
Porsche Stability Management (PSM)PSM is an active control system for stabilization of
the vehicle during extreme driving maneuvers. It
operates together with the Porsche Traction
Management (PTM) system.
PSM makes use of both the ABD and TCS
systems, as well as the known functions of the
anti-lock brake system (ABS) and engine drag
torque control system (MSR).
Warning!
In spite of the advantages of PSM, it is still the
driver’s responsibility to adapt her/his driving style
and maneuvers in line with road and weather
conditions, as well as the traffic situation.
The increased safety that is provided should not
induce you to take greater risks with your safety.
The limits set by the physics of driving cannot be
overcome, even with PSM.
Risks of accident due to inappropriate speed
cannot be reduced by PSM.Advantages of PSM
– Best possible traction and lane-holding ability
in all driving situations – even on road surfaces
with varying friction.
– The system compensates for undesired vehi-
cle reactions (load-alteration effect) when the
driver releases the accelerator pedal or brakes
on bends. This compensation functions up to
the maximum lateral acceleration.
– PSM actively stabilizes the vehicle as required
during dynamic driving maneuvers (e.g. rapid
steering movements, during lane changes or
on alternating bends).
– Improved braking stability on corners and on
different or varying road surfaces.
– Improved brake functioning and reduced
stopping distance in the event of emergency
braking.Readiness for operation
PSM is switched on automatically every time you
start the engine.
Function
Sensors at the wheels, brakes, steering system
and engine continuously measure:
– Driving speed
– Direction of travel (steering angle)
– Lateral acceleration
– Longitudinal acceleration
– Rate of turn about the vertical axis
PSM uses these values to determine the direction
of travel desired by the driver.
PSM intervenes and corrects the course if the
actual direction of motion deviates from the
desired course (steering-wheel position):
It brakes individual wheels as needed. If neces-
sary, PSM additionally influences the engine power
or the gear-changing characteristic of the
Tiptronic in order to stabilize the vehicle.
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240
Parking Limits of ultrasonic measurement
– ParkAssist cannot detect sound-absorbing
obstacles (e.g. winter operation, powder
snow),
– Sound-reflecting obstacles (e.g. glass sur-
faces, flat painted surfaces),
– And very thin obstacles.
Other ultrasound sources (e.g. pneumatic brakes
of other vehicles, jackhammers) can interfere with
detection of obstacles.
Fault indication without warning tone
All red light segments of the active warning indica-
tors light up when there is a temporary fault in
ParkAssist.
Note
Correct operation is no longer ensured if there is
a temporary fault (e.g. caused by ice formation or
heavy soiling on the sensors).
The system detects the temporary fault.
All light segments light up until a speed of
9mph (14km/h) is reached.
ParkAssist is ready for operation again when the
interference has been eliminated.Fault indication with warning tone
In the event of a long-lasting fault in ParkAssist,
the red light segments of the active warning indi-
cators light up and a continuous tone sounds for
three seconds after a transmission range has
been selected.
Possible causes
– Defect or system fault.
fSwitch ParkAssist off.
When ParkAssist is switched off, the indicator
light in the button lights up.
Please see the chapter “SWITCHING
PARKASSIST ON AND OFF” on Page 237.
fPlease have the fault remedied at an
authorized Porsche dealer.Driving with a trailer
The ParkAssist rear monitoring area is switched
off when the trailer’s power supply is plugged in.
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Maintenance and Car Care
271
High-pressure cleaning equipment, steam
cleaners
Warning!
High-pressure cleaning equipment, steam
cleaners or similar can damage the following
components:
–Tires
– Logos, emblems
– Painted surfaces
– Widened fenders
– Lock and latch of the removable towing attach-
ment
– Seals of the electrically retractable ball hitch
– Alternator, valve covers
– ParkAssist sensors
fPlease see the operating instructions from the
unit manufacturer.
fAlways cover the lid over the brake fluid reser-
voir prior to cleaning. Never point the cleaning
jet directly at the lid.
fWhen cleaning with a flat-jet nozzle or the like,
maintain a minimum distance of 21 in.
(50 cm).fNever use high-pressure cleaning equipment,
steam cleaners, etc. with a round-jet nozzle.
High-pressure cleaning equipment with a round
nozzle will damage your vehicle. The tires are
particularly susceptible to damage.
fDo not point the cleaning jet directly at any of
the aforementioned components.
Decorative foils Caution!
Risk of damage due to separation of the de-
corative foils when using high-pressure clea-
ning equipment, steam cleaners or similar
cleaning equipment.
fDo not use high-pressure cleaning equipment, steam cleaners, etc. to clean decorative foils.
Door lockfTo prevent the door lock from freezing during
the cold season, cover the lock barrel with a
suitable adhesive tape during washing.
Should the locks freeze, use an ordinary de-icer.
In many cases, a well warmed key can help.
Never use excessive force.
WashingThe best protection for the car from the damaging
effects of the environment is frequent washing and
preservation. The underside of the car should also
be thoroughly washed for cinders, salt or sanding
at winter‘s end.
The longer salt, road dust, industrial dust, insect
remains, bird excrement, and tree exudations
(resin, pollen), etc. are allowed to remain on the
bodywork, the more serious is their harmful
effect.
New cars should be washed carefully with plenty
of clear water to protect the new paint work.
Dark paint finishes show up the smallest of sur-
face damage (e.g. scratches) more readily than
lighter colors.
Dark colors are also more susceptible to scrat-
ching because of the composition of their pig-
ments and require particularly careful paint care.
fDo not wash your car in bright sunlight or while
the bodywork is still hot.
fWhen washing by hand, use abundant water, a
soft sponge or wash brush and Porsche car
shampoo.
fBegin by spraying the body thoroughly with
water to rinse away loose dirt.
fAfter washing, rinse the car with plenty of
water and then dry with a chamois leather.
Do not use the same chamois leather for
drying as you use for cleaning the windshield
and windows.
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272
Maintenance and Car Care
Warning!
Moisture which gets on the brakes during a
car wash can reduce braking efficiency or
make the brake pull unevenly which could
increase the danger of an accident, causing
serious personal injuries or death.
fAfter washing the vehicle, test the brakes and
steering and briefly brake the discs dry.
When doing so, make sure that vehicles travel-ling behind you are not affected.
Automatic car washes
fPlease see the chapter “WIPER BLADES” on
Page 261.
Optional add-on parts or parts which project be-
yond the contours of the vehicle may be damaged
by design features (e.g. brushes) of automatic car
washes.The following parts are particularly
susceptible to damage:
– Windshield wipers and rear wiper (always
switch them off – wiper stalk in position0 – to
prevent them wiping unintentionally in intermit-
tent or sensor operation).
– Door mirrors (always fold in).
– External antennas (always unscrew).
– Roof Transport System (always remove com-
pletely).
– Off-road roof-mounted headlights (always
remove completely).
– Spoiler.
– Wheels (the wider the rim and the lower the tire
height, the greater the risk of damage).
fPlease consult the operator before using
automatic car washes.
fWash and dry by hand all points not reached by
a car wash, such as door and lid seams or
door sills.
Note
Automatic car washes spray water at odd angles
and high pressures, which are not seen in normal
driving. Therefore, water can sometimes find its
way into the passengers compartment during or
shortly after the car wash.
10_Cayenne_21_KW17.book Seite 272 Donnerstag, 9. April 2009 3:33 15

Minor Repairs
315
Fuse assignment – fuse box in left side of dashboardNo. Designation Rating in A No. Designation Rating in A1
Cockpit socket at front centre, centre console sockets
at rear right and rear left
20
24
Tire Pressure Monitoring
5
2 Parking heater radio receiver 5 26Engine control unit (engine management, radiator fans,
airbag, clutch switch, instrument panel)10
3
Socket in passenger footwell
20
30
Off-road roof-mounted headlights
15
4 Parking heater 20 31
Off-road roof-mounted headlights15
5
Sockets in luggage compartment
20
33
Steering column module
15
7 Diagnostic socket, rain sensor 5 34 Passenger compartment monitoring 5
8
Wiper motor for windshield
30
35
Vehicle electrical system control unit (right fog light,
right additional high beam, interior light)
30
9Vehicle electrical system control unit
(pump for washer fluid)15 36 Control unit for power seat controls, left 30
10
Power window and central locking, rear left door
30
39
Heated rear window relay (control)
5
14 Power window and central locking, front left door 30 40 Instrument panel, diagnosis 5
15
Tail light, right
15
41
Kessy control unit (steering column lock, ignition lock,
Porsche Entry & Drive, clutch switch)
15
16 Vehicle electrical system control unit (horn) 20 42Sliding/lifting roof or Panorama roof system 30
17
Vehicle electrical system control unit (left turn signal
light, right side marker light, left low beam)
30
43
Subwoofer
30
18 Headlight washer system 25 44
Electrical seat adjustment, left30
19
Vehicle electrical system control unit (interior light)
5
45
Seat heating, rear
25
20Vehicle electrical system control unit (instrument
lighting, fog light left, left additional high beam)30 47 Rear differential lock 10
22
Rear differential lock, automatic rear lid
30
49
Servotronic
5
23 Differential lock 10 51 Air-quality sensor, diagnostic socket, parking brake 5
10_Cayenne_21_KW17.book Seite 315 Donnerstag, 9. April 2009 3:33 15

362
Index
Index2-zone air conditioning
Air-conditioning sensors
.................................... 71
Defrosting windshield
........................................ 70
Functional description
....................................... 70
Information on air-conditioning compressor
........... 65
Opening the cover flap
...................................... 64
Operating overview
........................................... 70
REST mode
..................................................... 65
Setting air distribution
....................................... 72
Setting air quantity
........................................... 71
Setting fan
...................................................... 71
Setting temperature
......................................... 71
Sun sensor
..................................................... 71
Switching air-conditioning compressor on/off
........ 65
Switching automatic mode on/off
........................ 71
Switching ECON mode on/off
............................. 65
Switching Mono function on/off
.......................... 72
Switching on automatic recirculating-air mode
....... 72
Switching on recirculating-air mode
..................... 72
Temperature sensor
......................................... 71
Using engine residual heat
................................. 65
4-wheel drive
Functional description
..................................... 182
Warning message on multi-purpose display
......... 154
4-zone air conditioning
Air-conditioning sensors
.................................... 76
Controlling rear air-conditioned areas
with the front control panel
................................ 79
Defrosting windshield
........................................ 75
Disabling control panel (rear)
.............................. 79
Disabling control panel
for air-conditioned areas at the rear
..................... 79
Functional description
....................................... 75
Information on air-conditioning compressor
........... 65
Opening the cover flap
...................................... 64
Operating overview, front
.................................. 75
Operating overview, rear
................................... 76
REST mode
..................................................... 65
Setting air distribution
....................................... 77
Setting air quantity
........................................... 77
Setting fan
...................................................... 77
Setting temperature
......................................... 77
Sun sensor
..................................................... 76
Switching air-conditioning compressor on/off
........ 65
Switching automatic mode on/off
........................ 76
Switching ECON mode on/off
............................. 65
Switching Mono function on/off
.......................... 78
Switching on automatic recirculating-air mode
....... 78
Switching on recirculating-air mode
..................... 78
Temperature sensor
......................................... 76
Using engine residual heat
................................. 65
AABD (Automatic brake differential)
Automatic deactivation
.................................... 184
Functional description
..................................... 182
ABS (anti-lock brake system)
Functional description
..................................... 186
Off-road ABS functional description
................... 187
Warning light on the tachometer
....................... 187
Warning message on multi-purpose display
......... 153
Additional door mirrors when towing a trailer
............... 234
Additional high beam
Changing bulb (Bi-Xenon headlights)
................... 331
Changing bulb (halogen headlights)
................... 330
Installing headlights
........................................ 328
Removing headlights
....................................... 327
Adhesive films, care instructions
................................ 275
Adjusting seat position
............................................... 36
Adjusting the opening height of the automatic rear lid
...... 26
After driving off-road
................................................ 196
Aftermarket Alarms
................................................. 219
Air cleaner maintenance instructions
.......................... 260
Air conditioner
Child lock (4-zone air conditioning)
...................... 79
Defrosting windshield with 2-zone air conditioning
.. 70
Defrosting windshield with 4-zone air conditioning
.. 75
Defrosting windshield with manual air conditioning
.67
Disabling control panel for air-conditioned areas
at the rear
...................................................... 79
Functional description of 2-zone air conditioning
.... 70
Functional description of 4-zone air conditioning
.... 75
Functional description of manual air-conditioning
.... 67
Information on air-conditioning compressor
........... 65
Opening the cover flap
...................................... 64
Operating overview of 2-zone air conditioning
........ 70
Operating overview
of 4-zone air conditioning, front
.......................... 75
Operating overview
of 4-zone air conditioning, rear
........................... 76
Operating overview of manual air conditioning
....... 67
Overview of air-conditioning systems
................... 64
Setting air distribution with 2-zone air conditioning
.71
Setting air distribution with 4-zone air conditioning
.77
Setting air distribution with manual air conditioning
.68
Setting air quantity with 2-zone air conditioning
..... 71
Setting air quantity with 4-zone air conditioning
..... 77
Setting air quantity with manual air conditioning
..... 68
Setting fan with 2-zone air conditioning
................ 71
Setting fan with 4-zone air conditioning
................ 77
Setting fan with manual air conditioning
................ 68
Setting temperature with 2-zone air conditioning
.... 71
Setting temperature with 4-zone air conditioning
.... 77
Setting temperature with manual air conditioning
... 68
Sun sensor for 2-zone air conditioning
................. 71
Sun sensor for 4-zone air conditioning
................. 76
Switching air-conditioning compressor on/off
........ 65
Switching automatic mode on/off
with 2-zone air conditioning
................................ 71
Switching automatic mode on/off
with 4-zone air conditioning
................................ 76
Switching child protection on/off
(4-zone air conditioning)
.................................... 79
Switching ECON mode on/off
............................. 65
Switching on automatic recirculating-air mode
with 2-zone air conditioning
................................ 72
Switching on automatic recirculating-air mode
with 4-zone air conditioning
................................ 78
Switching on recirculating air-mode
with manual air conditioning
............................... 68
Switching REST mode on/off
.............................. 65
Temperature sensor for 2-zone air conditioning
..... 71
Temperature sensor for 4-zone air conditioning
..... 76
Which system is in my car?
................................ 64
Air conditioning
Fresh-air intake
................................................ 80
Vents
............................................................. 79
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Index
363
Air pressure
Comfort tire pressure (bar/psi)
......................... 354
Data (bar/psi)
................................................ 354
Plate
............................................................ 348
Warning message on multi-purpose display
......... 151
Air suspension
.............................................. 225
, 238
Compressor connection for inflating tires.
.......... 308
Displaying status of level control
on multi-purpose display
.................................. 131
Lowering the car
............................................ 191
Lowering the car for loading
............................ 191
Overview
...................................................... 190
Raising the car
.............................................. 191
Setting loading level
....................................... 191
Setting low level
............................................. 191
Setting normal level
........................................ 191
Setting special terrain level
.............................. 191
Setting terrain level
........................................ 191
Warning message on the multi-purpose display
.... 192
Air vents
Adjusting
........................................................ 79
Opening/closing
.............................................. 79
Airbag
Airbag warning light on the tachometer
................ 49
Automatic deactivation of the passenger airbag
..... 47
Care Instructions
............................................ 277
Disposal
......................................................... 46
Function
......................................................... 46
Functional description
....................................... 45
Installation location
........................................... 45
Passenger airbag warning light
........................... 48
Unit
............................................................... 58
Air-conditioning compressor
Information on air-conditioning compressor
........... 65
Switching on/off (ECON mode)
........................... 65
Air-conditioning sensors
For 2-zone air conditioning
................................. 71
For 4-zone air conditioning
................................. 76
Alarm button
............................................................ 17
Alarm system
......................................................... 245
Function
....................................................... 245
Function indication
......................................... 247
Functional description
..................................... 245
Hitching a trailer
............................................ 230
Persons/animals remaining in the locked vehicle
. 246
Switching off alarm
......................................... 245
Switching off
passenger compartment monitoring system
....... 246
Switching on/off
............................................ 246
When disconnecting battery
............................. 321
Alcantara
Care instructions
............................................ 277
All-Season tires
Overview
................................... 350
, 351
, 352
All-Terrain tires
Overview
................................... 350
, 351
, 352
All-wheel drive
Functional description
..................................... 182
Warning message on multi-purpose display
......... 154
Aluminum rims
Care instructions
............................................ 276
Inscription
..................................................... 291
Antifreeze
.............................................................. 255
In coolant
..................................................... 255
In washer fluid
............................................... 258
Anti-freeze content
.................................................. 255
Anti-lock brake system (ABS)
Functional description
..................................... 186
Off-road ABS functional description
.................... 187
Warning light on the tachometer
....................... 187
Warning message on multi-purpose display
......... 153
Armrest
Opening front storage compartment
.................. 224
Opening rear storage compartment
................... 224
Ashtray
Front, emptying
............................................. 227
Front, opening
............................................... 227
Rear, emptying
.............................................. 228
Rear, opening
................................................ 228
Assembly aid for wheel changes
................................ 303
Assistance when driving downhill
(Engine Braking Support)
.......................................... 189
Audio
Tips
............................................................. 218
Audio interface, installation position
............................ 221
auto (light switch)
Functional description, driving light assistant
....... 104
Switching on driving light assistant
.................... 104
AUTO button
2-zone air conditioning
...................................... 71
4-zone air conditioning
...................................... 76
Automatic (Tiptronic S)
Functional description
..................................... 170
Gear selector
................................................ 171
Rocker switches on the steering wheel
................. 58
Selector lever
................................................ 171
Automatic anti-dazzle function for interior mirror
.............57
Automatic anti-dazzle operation
...................................57
Automatic brake differential (ABD)
Automatic deactivation
....................................184
Functional description
.....................................182
Automatic headlight beam adjustment
Functional description
.....................................106
Automatic speed control (cruise control)
Accelerating
..................................................167
Decelerating
..................................................168
Functional description
.....................................167
Interrupting operation
......................................168
Storing speed
................................................167
Switching off
.................................................168
Switching on
..................................................167
Automatic transmission fluid
......................................260
Automatically closing the rear lid
..................................25
AUX interface, installation position
..............................221
Average consumption
Displaying/resetting average consumption
on multi-purpose display
..................................132
Avoiding false alarms
...............................................245
BBaby seat
Installing with LATCH system
..............................53
LATCH restraint system
.....................................53
Prescribed installation direction
..........................50
Battery
..................................................................220After charging
................................................325
Care
............................................................321
Changing in car key
........................................322
Charge state
.................................................320
Charging
.......................................................325
General information
........................................320
Location
.......................................................320
Procedure after battery connection
...................322
Putting vehicle into operation
............................322
Replacing
......................................................321
Starting with jumper cables
..............................323
Vehicle electrical system voltage indication
.........121
Voltage indication
...........................................121
Warning message on multi-purpose display
.........152
Winter driving
................................................321
Before driving off
.............................................. 4
, 196
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Index
367
Emergency unlocking
Of the filler flap
.............................................. 267
Spare wheel bracket
....................................... 311
Emission control (check engine)
Functional description
..................................... 123
Warning light on the tachometer
....................... 123
Emission Control System
.......................................... 263
Engaging the rear differential lock
.............................. 178
Engine
Break in hints
.................................................... 6
Cooling system
.............................................. 122
Data
............................................................ 349
Idling
........................................................... 171
Starting
........................................................ 160
Stopping
...................................................... 161
Engine Braking Support
(assistance when driving downhill)
.............................. 189
Engine drag torque control (MSR)
Functional description
..................................... 184
Engine oil
.............................................................. 251Change
........................................................ 253
Change quantity
............................................. 359
Checking oil level with oil dipstick
...................... 252
Choosing the right oil
...................................... 253
Consumption
................................................. 349
Dipstick
........................................................ 253
Engine oil pressure
......................................... 153
Filler opening
................................................. 254
General information
........................................ 253
Level
........................................................... 252
Oil-level warning on the multi-purpose display
...... 252
Recommendation
........................................... 253
Temperature gage
......................................... 120
Topping up
................................................... 254
Engine oil level
....................................................... 252
Checking
...................................................... 252
Entry & Drive
Locking vehicle door with Porsche Entry & Drive
.... 21
Opening/closing Panorama roof system
with car key
.................................................... 99
Unlocking vehicle door with Porsche Entry & Drive
.20
Entry aid
Functional description
....................................... 39
Switching on/off
.............................................. 39
Error messages
Displaying
..................................................... 130
Overview of warning messages
on the multi-purpose display
............................. 149
Exhaust gas
Monitoring warning light
........................ 117
, 119
Exhaust pipes
............................................................. 3
Stainless steel tailpipes, care instructions
........... 276
Exit aid
Functional description
....................................... 39
Switching on/off
.............................................. 39
External audio source, interface
................................. 221
FFabric linings, care instructions
................................. 277
Factory settings
Resetting multi-purpose display
......................... 148
Faults
After charging the battery
................................ 325
Emergency operation of automatic rear lid
........... 26
Emergency operation of ignition key
in ignition lock
............................................... 159
Emergency operation of rear lid
.......................... 31
Emergency operation of sliding/lifting roof
............ 94
Emergency operation
of the Panorama roof system
........................... 101
Emergency operation of the spare wheel bracket
.311
Emergency operation of Tiptronic selector lever
.. 175
Emergency unlocking of the filler flap
................. 267
Overview of warning messages
on the multi-purpose display
............................. 149
Panorama roof system
...................................... 99
ParkAssist
.................................................... 240
Parking heater
................................................. 85
Power windows
................................................ 90
Sliding/lifting roof
............................................. 94
When opening and closing
................................. 31
Filler flap
............................................................... 267Emergency unlocking
...................................... 267
Filling pressure
Plate location
................................................ 348
Reducing
............................................ 307
, 308
Tires (bar/psi)
............................................... 354
Warning light on speedometer
.......................... 141
Warning message on multi-purpose display
......... 151
Filter
Air cleaner maintenance instructions
.................. 260
Particle filter maintenance instructions
............... 260
Fire extinguisher
....................................................... 40
Floor mats, care instructions
..................................... 277
Fluids and fuels
Brake fluid
....................................................359
Coolant
........................................................359
Engine oil
......................................................359
Fuel
.............................................................359
Hydraulic fluid for power steering
......................259
Overview
......................................................359
Washer fluid
..................................................359
Folding key bit in/out
.................................................16
Folding wedges to prevent rolling
...............................296
Footbrake
..............................................................163
Warning light
.................................................164
Footwell lightning
Dimming
.......................................................109
Four-wheel drive
Functional description
.....................................182
Warning message on multi-purpose display
.........154
Four-zone air conditioning
Air-conditioning sensors
.....................................76
Controlling rear air-conditioned areas
with the front control panel
................................79
Defrosting windshield
........................................75
Disabling control panel (rear)
..............................79
Disabling control panel for air-conditioned areas
at the rear
.......................................................79
Operating overview, front
...................................75
Operating overview, rear
...................................76
REST mode
.....................................................65
Setting air distribution
.......................................77
Setting air quantity
...........................................77
Setting temperature
..........................................77
Switching ECON mode on/off
.............................65
Switching Mono function on/off
...........................78
Switching on automatic recirculating-air mode
.......78
Switching on recirculating-air mode
.....................78
Using engine residual heat
.................................65
Fresh-air intake
.........................................................80
Front seat
Adjusting
........................................................36
Drawer under the right front seat
......................225
Passenger mirror as parking aid
.........................38
Recalling settings (memory)
...............................37
Storing driver’s seat settings (memory)
................38
Storing passenger’s seat settings (memory)
..........38
Front seat with memory
..............................................37
Storing door mirror settings
...............................56
Front seats
..............................................................34
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