2006 PORSCHE CAYMAN heating

Maintenance, Car Care
191
How Emission Control Works When an automobile engine is running, it uses en-
ergy generated through the combustion of a mix-
ture of air and fuel. Depending on whether a car is
driven fast or slowly or whether the engine is cold
or hot, some of the fuel (hydrocarbons) may not
be burned completely, but may be discharged into
the engine crankcase or exhaust system. Addition-
al hydrocarbons may enter the atmosphere
through evaporation of fuel from the fuel tank.
These hydrocarbons (HC), when released into the
air, contribute to undesirable pollution.
In addition, carbon monoxide (CO) and oxides of
nitrogen (NOx) contribute to engine emissions.
They, too, are formed during the combustion proc-
ess and discharged into the exhaust system.
To reduce these pollutants, your Porsche is
equipped with a precisely calibrated fuel injection
system to assure a finely balanced air/fuel mixture
under all operating conditions. Oxygen sensor The oxygen sensor, installed in the exhaust pipe
continuously senses the oxygen content of the ex-
haust and signals the information to an electronic
control unit. The control unit corrects the air/fuel
ratio, so the engine always receives an accurately
metered air/fuel mixture.
Crankcase ventilation Through crankcase ventilation, undesirable emis-
sions from the engine crankcase are not permit-
ted to reach the outside atmosphere. These emis-
sions are recirculated from the crankcase to the
air intake system. From here the emissions mix
with the intake air and are later burned in the en-
gine. Catalytic converters The catalytic converters are efficient ”clean-up“
devices built into the exhaust system of the vehi-
cle. The catalytic converters burn the undesirable
pollutants in the exhaust gas before it is released
into the atmosphere.
The exclusive use of unleaded fuel is critical-
ly important for the life of the catalytic con-
verters. Therefore, only unleaded fuel must
be used.
The catalytic converters will be damaged by:
– push or tow starting the vehicle,
– misfiring of the engine,
– turning off the ignition while the vehicle is mov-
ing or
– driving until the fuel tank is completely empty,
– by other unusual operating conditions. fDo not continue to operate your vehicle under
these conditions, since raw fuel might reach
the catalytic converters. This could result in
overheating of the converters. Federal law pro-
hibits use of leaded fuel in this car.
Fuel Evaporation Control Fuel tank venting The evaporation chamber and the carbon canister
prevent fuel from escaping to the atmosphere at
extreme high outside temperatures, when driving
abruptly around curves and when the car is parked
at an incline or in any other nonlevel position. Vapor control system and storage When the fuel tank is filled, vapors are collected in
the evaporation chamber by a vent line leading the
vapors to the carbon canister where they are
stored as long as the engine does not run. Purge system fWhen the engine is running, the fuel vapors
from the canister will be mixed with fresh air
from the ambient air of the canister. This mix-
ture will be directed to the intake air housing by
the tank vent line, mixed with the intake air and
burned during normal combustion.

Practical Tips, Emergency Service
243
3. Run the engine of the donor car at a higher
speed.
4. Start the engine.
An attempted start using jump leads should
not last more than 15 seconds. Then allow a
waiting period of at least one minute.
5.Note
Before disconnecting the jump leads, electrical
loads such as the heated rear window and the
heating fan blower should be switched on (the
vehicle’s lights must not be switched on). This
reduces voltage peaks which may occur when
disconnecting the jump leads.
With the engine running, remove both jump
leads in reverse order.

Index
277
Warning light ........................................ 86
Cooling system .....................................86
, 176
Cruise control ............................................... 82
Cupholder .................................................. 143
DDashboard ................................................... 72
Data bank .................................................. 264
Defrosting windows .............................130
, 133
Diagnostic socket .................................15, 233
Diagrams ................................................... 274
Dimensions ................................................ 273
Dipped beam .............................................. 246
Door ............................................................ 23
Handles................................................ 23
Locks...........................................23, 197
Mirror heating ....................................... 31
Windows ............................... 23
, 26, 199
Doors
Guard lights ........................................ 257
Driving hints ................................................. 12
Driving in winter .......................................... 170
Driving performance ................................... 270
Drop-center rim .......................................... 220
DVD Navigation........................................... 149
EElectrical system ........................................ 232
Emergency flasher ...................................... 137
Emergency operation
Central locking................................19
, 20
Lids ................................................... 234
Tank cap ............................................ 187Emergency program, Tiptronic .....................170
Emergency service......................................206
Emergency starting with jump leads .............242
Emergenzy operation....................................20
Emission control system ........... 7
, 90, 190
, 191
Engine
Checking the oil level ...........................110
Compartment............................. 172, 206
Compartment blower ...................... 77, 86
Exhaust ..................................................8
Number ..............................................265
Oil consumption ....................................14
Oil level indicator.................................110
Oils ....................................................271
Speeds ................................................14
Starting ................................................74
Switching off.........................................74
Environment ...................................................6
FFire extinguisher .........................................145
Flat tire ......................................................224
Floor mats ..................................................202
Fog lights .......................................... 122
, 256
Footwell light ..............................................257
Front lid......................................................147
Trunk entrapment................................146
Front luggage compartment.........................149
Fuel ................................................ 4
, 88, 186
Containers ..............................................8
Economy ............................................184
Evaporation ........................................191
Level gauge ..........................................88
Level warning light................................88Portable Containers ............................ 189
Recommendation ....................... 188
, 189
Tank.......................................... 186, 187
Function keys ............................................... 38
Fuses ........................................................ 233
GGarage door opener................................... 159
Garage lift ................................................. 223
Gearchanging ............................................ 163
Glove compartment .................................... 142
Gong .............................. 75
, 76, 94, 120
, 122
Ground clearance ........................................... 8
HHandbrake ................................................... 55
Hands-free microphone................................. 72
Headlights ......................................... 124
, 246
Adjusting ................................... 258, 259
Cleaning system ................. 125
, 192
, 271
Heated rear window...................................... 31
Heating ............................................. 130, 133
High beam
Indicator light ....................................... 85
Lever......................................... 122, 124
Home mode............................................... 123
HomeLink .................................................. 159
Hoods ....................................... 146
, 148
, 150
Horn ..................................................... 15, 19
IIdentifikation number.................................. 264

Index
279
Rear fog light .....................................122
, 256
Rear lid ...................................................... 150
Rear view mirrors ......................................... 29
Rear window defogger.................................. 31
Rear wiper ................................................. 127
Replacing ........................................... 175
Relays ........................................................ 232
Release button ........................................... 165
Remote control ............................................. 18
Replacement key .......................................... 17
Replacing bulbs .......................................... 245
Replacing wiper blades................................ 173
Retractable rear spoiler ................................. 66
Rims
Diameter ............................................ 220
Rim width ........................................... 220
Roof load ................................................... 162
Roof Transport System........................162, 272
Running in .................................................... 14
SSafety belts ..........................................40
, 202
Warning light ........................................ 41
Safety compliance sticker ........................... 264
Sealing set ................................................. 225
Seals, care of ............................................. 200
Seat ............................................................ 32
Adjustment ........................................... 32
Heating ................................................ 36
Memory ............................................... 34
Selector lever ............................................. 165
Selector lever position indicator .............87, 167
Service flap ................................................ 151
Shifting gear............................................... 164Shiftlock .....................................................165
Side lights ..................................................256
Side marker light ............................... 122
, 253
Side storage compartments ........................144
Side vents ..................................................136
Snow chains .............................. 218
, 268
, 269
Snow tires ......................................... 217, 268
Sockets .....................................................140
Spacers .....................................................230
Spare key .....................................................17
Spare wheel ...............................................269
Speed code letter .......................................219
Speed control .............................. 82
, 129
, 130
Speed limit .......................................... 94, 219
Speedometer................................................84
Spoiler .........................................................66
Sport mode ..................................... 61
, 64, 65
Sports seat ..................................................32
Stability management system (PSM) ...............62
Starting ................................................. 74, 75
Starting and stopping the engine ....................74
Steering wheel
Adjustment ...........................................37
Buttons ................................................38
Lock ................................. 74
, 75, 76, 77
Rocker switches..................................165
Toggle switches ..................................165
Stopwatch ....................................................98
Storage options ..........................................141
Storing your Porsche..................................203
Sun visors ....................................................39
TTachometer ..................................................85Tail light ..................................................... 255
Tank .................................................. 186
, 187
Cap ................................................... 187
Ventilation system.............................. 191
Telephone .................................................. 157
Temperature setting........................... 130, 133
Temperature, outside indicator ...................... 89
Test stand, measurements ............................ 64
Theft protection ........................................... 16
Tie-down rings ........................................... 151
Tiptronic .................................................... 165
Indicator .............................................. 87
Tire filling compressor ................................ 149
Tire pressure monitoring ............................. 103
Tires ........................................... 14
, 207
, 268
Checking pressure............................. 227
Inscription .......................................... 219
Loading information ............................ 221
Pressure................................ 5
, 210
, 269
Pressure plate.................................... 265
Sealant .............................................. 225
Sidewall ............................................. 219
Size .................................................. 219
Tires and tire care ...................................... 207
Tools ......................................................... 149
Towing .............................................. 260, 261
TPC Tire pressure monitoring ...................... 103
Track ........................................................ 268
Transmission ............................. 163
, 164
, 267
Fluid .......................................... 194, 271
Trunk entrapment ....................................... 146
Turn signals ......................................... 85, 124