2005 PORSCHE BOXSTER heating

Maintenance, Car Care
183
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. Addito-
nal hydrocarbons may enter the atmosphere th-
rough 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 pro-
cess and discharged into the exhaust system.
To reduce these pollutants, your Porsche is equip-
ped with a precisely calibrated fuel injection sys-
tem to assure a finely balanced air/fuel mixture un-
der 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 engi-
ne. Catalytic converters The catalytic converters are efficient ”clean-up“
devices built into the exhaust system of the vehic-
le. 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 mo-
ving 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.

Practical Tips, Emergency Service
237
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
273
Level.................................................. 170
Temperature gauge.............................. 80
Warning light ........................................ 80
Cooling system .....................................80
, 170
Cruise control ............................................... 76
Cupholder .................................................. 128
DDashboard ................................................... 65
Data bank .................................................. 258
Defrosting windows .............................114
, 117
Diagnostic socket .................................15, 227
Diagrams ................................................... 268
Dimensions ................................................ 267
Dipped beam .............................................. 241
Door ............................................................ 25
Guard lights ........................................ 251
Handles................................................ 25
Locks...........................................25, 194
Mirror heating ....................................... 33
Windows ....................... 25
, 28, 154
, 196
Driving hints ................................................. 12
Driving in winter .......................................... 152
Driving performance ................................... 265
Drop-center rim .......................................... 215
DVD Navigation........................................... 136
EElectrical system ........................................ 226
Emergency flasher ...................................... 121
Emergency operation
Central locking................................19
, 22
Convertible top ................................... 157Lids ...................................................228
Tank cap ............................................179
Emergency program, Tiptronic .....................152
Emergency service......................................202
Emergency starting with jump leads .............236
Emergenzy operation....................................22
Emission control system ........... 7
, 84, 182
, 183
Engine
Checking the oil level .............................97
Exhaust ..................................................8
Number ..............................................259
Oil consumption ....................................14
Oil level indicator...................................97
Oils ....................................................266
Speeds ................................................14
Starting ................................................67
Switching off.........................................67
Engine compartment
Blower .......................................... 70, 80
Lid ............................................ 135, 185
Lid warning light ..................................134
Environment ...................................................6
FFire extinguisher .........................................131
Flat tire ......................................................219
Floor mats ..................................................199
Fog lights .................................. 108
, 246
, 249
Footwell light ..............................................250
Front lid......................................................135
Fuel ................................................ 4
, 82, 178
Containers ..............................................8
Economy ............................................177
Evaporation ........................................184Level gauge ......................................... 82
Level warning light................................ 82
Portable Containers ............................ 181
Recommendation ....................... 180
, 181
Tank.......................................... 178, 179
Function keys ............................................... 40
Fuses ........................................................ 227
GGarage door opener................................... 142
Garage lift ................................................. 218
Gearchanging ............................................ 145
Glove compartment .................................... 127
Gong .............................. 68
, 69, 88, 107
, 108
Ground clearance ........................................... 8
HHandbrake ................................................... 51
Hardtop ..................................................... 162
Headlights ......................................... 109
, 241
Adjusting ................................... 252, 253
Cleaning system ................. 110
, 184
, 266
Heated rear window...................... 33
, 165
, 166
Heating ............................................. 114, 117
High beam
Indicator light ....................................... 79
Lever......................................... 108, 109
Home mode............................................... 108
HomeLink .................................................. 142
Hoods ............................................... 132, 135
Horn ..................................................... 15, 21

Index
275
RRadiator fans .............................................. 171
Radio reception .......................................... 139
Rain sensor ................................................ 110
Range on remaining fuel ........................87
, 100
Rear fog light .....................................108, 249
Rear lid ...................................................... 132
Rear spoiler............................................62, 63
Rear view mirrors ......................................... 31
Rear window defogger.................................. 33
Rear wing
Retractable........................................... 62
Relays ........................................................ 226
Release button ........................................... 147
Remote control ............................................. 18
Replacement key .......................................... 17
Replacing bulbs .......................................... 239
Replacing wiper blades................................ 169
Retractable spoiler........................................ 62
Rims
Diameter ............................................ 215
Rim width ........................................... 215
Running in .................................................... 14
SSafety belts ..........................................42
, 199
Warning light ........................................ 43
Safety compliance sticker ........................... 258
Sealing set ................................................. 220
Seals, care of ............................................. 197
Seat ............................................................ 34
Adjustment ........................................... 34
Heating ................................................ 38Memory................................................36
Selector lever .............................................147
Selector lever position indicator ............ 81
, 149
Shifting gear ...............................................146
Shiftlock .....................................................147
Side lights ..................................................249
Side marker light ............................... 108, 248
Side vents ..................................................120
Snow chains .............................. 213
, 263
, 264
Snow tires ......................................... 212, 262
Sockets .....................................................124
Spare key .....................................................17
Spare wheel ...............................................264
Speed code letter .......................................214
Speed control .............................. 76
, 113
, 114
Speed limit .......................................... 88, 214
Speedometer................................................78
Spoiler .........................................................62
Fixed ....................................................63
Retractable ...........................................62
Sport mode ..................................... 57
, 60, 61
Sports seat ..................................................34
Stability management system (PSM) ...............58
Starting ................................................. 67, 68
Starting and stopping the engine ....................67
Steering wheel
Adjustment ...........................................39
Buttons ................................................40
Lock ................................. 67
, 68, 69, 70
Rocker switches..................................147
Toggle switches ..................................147
Stopwatch ....................................................92
Storage options ..........................................126
Storing your Porsche..................................200
Sun visors ....................................................41Switching passenger’s airbag on and off ........ 48
TTachometer ................................................. 79
Tail light ..................................................... 249
Tank .................................................. 178
, 179
cap ................................................... 179
Ventilation system.............................. 184
Telephone .................................................. 141
Temperature setting........................... 114, 117
Temperature, outside indicator ...................... 83
Test stand, measurements ............................ 60
Theft protection ........................................... 16
Tiptronic .................................................... 147
Indicator .............................................. 81
Tires ................................... 14
, 203
, 262
, 263
Checking pressure............................. 223
Inscription .......................................... 214
Loading information ............................ 216
Pressure................................ 5
, 206
, 263
Pressure plate.................................... 259
Sealant .............................................. 220
Sidewall ............................................. 214
Size .................................................. 214
Tires and tire care ...................................... 203
Tools ......................................................... 136
Towing .............................................. 254, 255
Track ........................................................ 262
Transmission ............................. 145
, 146
, 261
Fluid .......................................... 190, 266
Trunk entrapment ....................................... 132
Turn signals ......................................... 79, 109