2004 SAAB 9-5 wheel torque

165 Starting and driving
If you move the selector lever from D to L, downchanges will follow
a set pattern to avoid damaging the engine or transmission.
Manual gear-changing is not recommended on slippery roads.
If one of the drive wheels spins excessively, the engine torque will
be reduced to avoid damaging the transmission.
Adaptive gear-change patternsAdaptive gear-change patterns are selected automatically depend-
ing on the engine load and the present temperature of the transmis-
sion. The function is available in Normal and Sport modes.
The changes occur at a higher engine speed and the car remains in
the same gear for longer, if the transmission control module senses
that the load has not decreased. These gear-change patterns pre-
vent unnecessary changing up and down, when for example driving
up or down long slopes with a trailer or caravan, and to prevent over-
heating the transmission oil. The adaptive gear-change function is
also selected automatically when the transmission oil becomes too
hot, to protect the transmission itself from damage and to lower the
oil temperature.
The adaptive gear-change pattern function is deselected when:
 Winter mode is selected.
 The engine is switched off.
 The load is reduced so much that the function is no longer
required.
 ”Automatic transmission, fault indicator” appears on main
instrument panel, see page 161.
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171 Starting and driving
Traction Control SystemHow the system works The traction control system (TCS) is
designed to prevent wheelspin. This
enables the car to achieve the best possible
grip and, hence, maximum tractive effort,
together with greater stability.
The TCS system uses information from the
ABS system’s wheel sensors to detect
when the front (driving) wheels are rotating
faster then the rear wheels. It then monitors
whether one driving wheel is rotating faster
than the other. If so, the faster wheel is
retarded until both wheels are rotating at the
same speed.
If the two front wheels are rotating at the
same speed but are turning faster than the
rear wheels, the torque from the engine is
reduced to eliminate the difference.
To ensure that the system works as
designed, the dimensions of all four tires
must be the same.
The process continues until all the wheels
are rotating at the same speed.
The advantages of the TCS system become
most apparent when the cohesion between
the front wheels and the road surface is so
low that one or both of the wheels would
lose their grip were the car not equipped
with the TCS, e.g.:  When the car is pulling away or accelerat-
ing with the front wheels on different sur-
faces (e.g. one slippery and one dry). The
TCS then functions like an electronic dif-
ferential lock.
 When the car is pulling away or accelerat-
ing on a slippery road, in which case the
TCS eliminates wheelspin. The same
applies when the car is reversing.
 On cornering, if there is a tendency for the
inner front wheel to rotate faster than the
other wheels.
 On overtaking.
TCS indicatorThe indicator light will come on for
4 seconds when the ignition key is turned to
ON, while an internal system check is per-
formed.
The light in the tachometer comes on
when the system is operative, i.e. when the
wheels are not rotating at the same speed.
The fact that the TCS system is operative
indicates that the limit for grip has been
exceeded and that the driver must exert
greater care.
WARNING
When driving normally, TCS will help to
improve the stability of the car. This does
not mean that car can be driven faster.
The same care and prudence as normally
applied should be displayed on cornering
and when driving on slippery roads.
IB1766
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181 Starting and driving
Recommendations for cars with manual
gearbox
Rises in coolant temperature are indicated
by the temperature gauge in the main instru-
ment panel.
The following steps are taken in order as the
temperature of the engine increases:
 A/C compressor is switched off.
 engine torque is reduced.
When continuing your journey, select a gear
in which the engine speed is about
3,000 rpm until the incline eases.
Driving considerations Always take extra care when towing a
trailer, as the car’s handling will be different
and its braking effect reduced. The trailer’s
braking system and suspension also have a
considerable effect on these characteris-
tics, see also ”Driving with a load” page 185.
If the car has automatic transmission, select
position D when ascending steep hills. This
ensures that the adaptive gear change pat-
terns are operational, see page 165. Use
position D or L for steep descents.
Checks before drivingMake sure that the car and caravan or trailer
are in good working order. This is essential
since towing a caravan increases the strain
on the car.
 Check and if necessary adjust the tire
pressure of the car and caravan.
 Make sure all wheel bolts are properly
tightened.
 Make sure that the equipment joining the
car and caravan is properly secured and
adjusted.
 Make sure the caravan’s electrical cable
is properly connected and is not so long
that it drags along the ground. Also, make
sure the cable is not too short and risks
breaking when turning a corner.
 Check all bulbs.
 Check the car and caravan brakes.
 Make sure that all items on or in the cara-
van or trailer are properly secured.
 Make sure that the caravan’s jockey
wheel is raised and locked.
 Check the distribution of the load so that
the car and caravan are well balanced.
 Check that the rearview mirrors provide
the best possible rearward vision.
 Make sure the caravan’s safety cable is
correctly attached.
VARNING
Utilize the braking effect of the engine
(1st, 2nd or 3rd gear) when you are
descending long or steep hills to spare
the brakes.
Brake failure can result from overheated
brakes!
NOTICEIf the ”Automatic transmission, fault indi-
cator” indicator comes on, cease
towing until the problem has been recti-
fied.
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203 Car care and technical information
ORVR (Onboard Refueling Vapor
Recovery)Hydrocarbon vapors formed when refueling
will be recovered by the car and not
released into the atmosphere. The hydro-
carbons are absorbed in a evaporative
emission canister. When the engine is sub-
sequently started, the evaporative emission
canister is gradually purged as air is sucked
into it through a shut-off valve. The hydro-
carbon/air mixture passes through the evap
canister purge valve and into the engine
where it is burned.
When refueling, make sure you screw the
filler cap on and keep turning until it has
clicked at least 3 times. Otherwise, it is pos-
sible for the CHECK ENGINE light to illumi-
nate and a ”Tighten fuel filler cap.” message
to appear on SID.
Refueling, see page 154.
EngineThe 2.3-liter model is a transverse, 4-cylin-
der in-line engine with twin overhead cam-
shafts and 4 valves per cylinder.
This engine is equipped with balance shafts
that reduce engine vibration to a minimum.
The balance shafts are chain driven and
rotate at twice the speed of the crankshaft.
They produce forces and torques that are
opposed to those generated by the pistons
and connecting rods, an effect that occurs
twice for each revolution of the engine.
Engine noise is also reduced as the
counter-rotating shafts counteract the vibra-
tion from the moving parts of the engine.The transmission, located on the right
(viewed from the front), is integrated with
the engine. All models have front-wheel
drive.
IB601
Balance shafts
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247 Car care and technical information
Changing a wheel
WARNING
 The car jack is designed solely for use
in changing a wheel or fitting snow
chains. It must not be used to sup-
port the car during repair work or
servicing.
Never crawl under a car that is
supported only by a jack.
 Special care must be taken if the car is
on a slope – use wheel chocks!
 Position chocks, one ahead and one
behind, the wheel that is diagonally
opposite to the one to be changed.
 Switch on the hazard warning lights if
the car is on a road.
 Apply the parking brake and leave the
car in gear (1st or reverse). Automatic
transmission: move selector to the
P position.
 Ensure that everybody is out of the car
before jacking it up.
 Never start the engine while the car is
jacked up.
 The jack must stand on a firm, level
surface.
 Stow the jack in the place provided for
it under the panel in the floor of the
trunk. Secure it properly to avoid injury
to passengers in the event of a crash.
 Do not use the jack for any purpose
other than for jacking up the car.
 Grit, salt and rust can clog the inner
threads of the wheel bolts if the car has
been driven for several years exclu-
sively with alloy wheels.
If steel wheels are now fitted, the bolt
hole threads in the brake hubs should
be cleaned before the thinner steel
wheels are fitted. It may otherwise not
be possible to achieve the required
clamping force despite tightening the
bolts to the correct torque.
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250 Car care and technical information1 Put the car in 1st gear (automatic trans-
mission: move selector to the P position)
and apply the parking brake.
2 Wind the jack up to a suitable height
before placing it under the recess in the
sill.
Make sure that the jack fully engages
the recess in the sill and that the base of
the jack is steady and flat on the ground.
3 Remove the wheel cover (where appli-
cable).
Loosen the wheel bolts by half a turn.
4 Wind the jack to raise the wheel clear of
the ground. Remove the wheel bolts and
lift off the wheel.
5 Clean any rust or dirt from the contact
surfaces between the wheel and brake disc. Do not wipe away the grease in the
hub.
6 Fit the wheel and screw in the bolts in the
sequence shown (opposite pairs).
Tighten the bolts enough for the bolts
and wheel to be seated correctly.
7 Lower the car and tighten the wheel
bolts to the correct torque in the
sequence shown (opposite pairs).
Tightening torque
Light-alloy wheels: 80 ft.lbs. (110 Nm)
Steel wheels: 80 ft.lbs. (110 Nm)
Do not overtighten the bolts using an
impact wrench: not only can this
damage the wheels but it can also make
it impossible to undo the bolts using the
wheel wrench in the car’s toolkit.
8 Check-tighten the wheel bolts after a few
miles.
Tightening torque
Light-alloy wheels: 80 ft.lbs. (110 Nm)
Steel wheels: 80 ft.lbs. (110 Nm)NOTICE When refitting wheel covers (where
applicable), make sure that the valve
protrudes through the marked hole in
the wheel cover.
 Do not overtighten the bolts using an
impact wrench: not only can this
damage the wheels but it can also
make it impossible to undo the bolts
using the wheel wrench in the car’s
toolkit.
Clean any rust or dirt from the contact sur-
faces between the wheel and brake disc
IB2428
Do not wipe away the grease in the hub.
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251 Car care and technical information
WARNING
Grit, salt and rust can clog the inner
threads if the car has been driven for sev-
eral years exclusively with alloy wheels.
If steel wheels are now fitted, the bolt hole
threads in the brake hubs should be
cleaned before the thinner steel wheels
are fitted. It may otherwise not be possi-
ble to achieve the required clamping force
despite tightening the bolts to the correct
torque.
IB539
Tightening sequence, wheel bolts
IB1800IB1800
Removing the wheel cover
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286 IndexRoof load
_____________________ 183
Running-in ____________________ 174
SSDM
_________________________ 267
SID
___________________________ 63
Saab 9-5 Audio System
___________ 85
Saab Information Display (SID)
_____ 63
Saab Parking Assistance
_________ 194
Safety belts
_____________________ 17
Safety belts, care of
_____________ 253
Safety-belt pretensioners
__________ 18
Safety-belt reminder
______________ 17
Seats
__________________________ 12
Securing a load
__________________ 44
Selector lever indication, automatic
transmission
___________________ 63
Sentronic, manual mode
__________ 163
Service costs
__________________ 265
Service information
______________ 266
Service intervals
________________ 264
Service record retention
__________ 265
Settings, seats
__________________ 12
Side airbags
____________________ 35
Signalling, horn _________________ 120
Sliding floor, 9-5 Wagon
__________ 143
Snow chains
___________________ 176
Spare wheel ___________________ 246
Spare wheel and tools
___________ 145
Spark plugs
____________________ 275
Speedometer ________________ 60
, 61Starting in cold weather, ACC
_______ 81
Starting in hot weather, ACC _______ 81
Steering wheel adjustment
________ 120
Steering, technical data
__________ 277
Steps for determining correct load
limit
_________________________ 244
Stone-chip damage, repairing
______ 255
Storage compartments
___________ 132
Sun visors
_____________________ 131
Sunroof
_______________________ 128
Suspension ____________________ 277
Suspension, technical data
________ 277
Switches
_______________________ 69
Symboler ________________________ 9
Systems, adjustment
_____________ 282
TTCS OFF
_______________________ 59
Table of fuses
__________________ 229
Tachometer
_____________________ 60
Tailgate, opening
________________ 44
Tank gauge
_____________________ 61
Technical data __________________ 269
Telematics
_____________________ 107
Temperature control, ACC
_________ 77
Temperature gauge, engine ________ 61
Temperature zones, ACC
__________ 77
Textile carpeting
________________ 253
Through-load hatch ______________ 137
Tie Downs
_____________________ 137
Tightening torque, wheel studs
_____ 247Tip, driving at night
______________ 185
Tip, to avoid theft
________________ 197
Tire chains
_____________________ 239
Tire date code __________________ 245
Tire inspection and rotation
________ 234
Tire markings
___________________ 241
Tire pressure ___________________ 186
Tire sidewall labeling
_____________ 240
Tire terminology and definitions
____ 242
Tire, compact spare
______________ 246
Tires
_____________________ 233
, 278
Tires, winter
____________________ 278
Tools
_________________________ 145
Touching-in the paintwork
_________ 255
Towbar attachment
______________ 178
Towbar load
____________________ 182
Towing the car __________________ 188
Towing, automatics
______________ 188
Traction
_______________________ 171
Trailer weights
__________________ 271
Treadwear indicators
_____________ 235
Trionic
________________________ 202
Trip computer
___________________ 63
Trip meter
______________________ 60
Trunk
_________________________ 135
Trunk lid, opening
________________ 44
Turbo gauge
____________________ 62
Turbo, points to note
_____________ 151
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