2002 SAAB 9-3 torque

156 Starting and drivingAutomatic transmission

The electronic control module for the auto-
matic transmission receives information on
engine torque and road speed. It also con-
trols the hydraulic pressure in the transmis-
sion to ensure that gear changing is as
smooth as possible.
The position of the selector lever is shown
by the symbols adjacent to the lever and
also by an indicator on the main instrument
panel.
The ignition key can only be removed when
the selector lever is in the P position.When the car is stationary, the engine must
be idling when the selector lever is moved.
You must have your foot on the brake
pedal to move the lever out of park.
If the accelerator is depressed while the
lever is moved, this will result in abnormal
wear in the transmission.
WARNING
 Make it a habit to keep your foot on the
brake when selecting a drive position,
to prevent the car from creeping for-
ward (or backwards if reverse is
selected).
 The car must be at a standstill before
P, R or N is selected. You have to have
your foot on the brake pedal to move
the lever out of park. If the car is still
moving when a drive position is subse-
quently selected, this could cause a
crash or damage the automatic trans-
mission.
 Never park the car with the selector
lever in a drive position, even if the
parking brake is on.
 If you want to leave the car with the
engine running, move the selector
lever to P or N and apply the parking
brake.
NOTEAfter selecting a drive position, pause
briefly to allow the gear to engage (the car
starts to pull a little) before you acceler-
ate.
IB865
Selector lever 1Catch
2 Button for SPORT position
3 Button for WINTER position
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158 Starting and drivingLock-up functionThe automatic transmission has a lock-up
function, which renders the torque con-
verter inoperative in 3rd and 4th gears. The
result is reduction in the engine speed and,
hence, fuel consumption.
When the lock-up function comes into oper-
ation, it may give the impression of an over-
drive being engaged.Kick-downWhen the accelerator is pressed down hard,
a downshift to the next lower gear will occur
to provide maximum acceleration, e.g. for
overtaking.
The change-up to the next gear again will
take place either when the accelerator is
released or when maximum engine speed
for that gear is reached.
Park Brake Shift LockThe transmission has a safety function
called Park Brake Shift Lock. For the selec-
tor lever to be moved out of the P position,
the brake pedal must be depressed at the
same time as the detent button is lifted.
Park Brake Shift Lock override
1 Apply the parking brake.
2 Make sure the key is in the ON position.
3 Use a small tool such as a screwdriver
and push the lever downwards so that
the detent button can be pressed
approx. 10 mm.
4 Move the selector out of position P to N.
5 Remove the tool.
6 Release the parking brake if the car is to
be moved immediately; otherwise keep
it applied.Check fuse No. 12 (see page 208). If the
fuse is OK, check the battery voltage.
If the problem was cured by changing the
fuse or battery, you do not have to contact a
Saab dealer.
If the fuse blows again as soon as the Shift
Lock feature is activated you should contact
your Saab dealer.NOTEIf a problem arises with the shift lock
mechanism, it may not be possible to
move the selector out of the park position,
even if the ignition is ON. If for some
reason the selector has to be moved out
of the park position (i.e. to tow the car a
short distance) do as described below.
IB947
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161 Starting and driving
If the gear selector lever is moved from position D to 1, a
change-down to 3rd gear will occur at about 110 mph (180 km/h).
A change-down to 2nd gear will occur at about 75 mph (120 km/h)
and to 1st gear at about 40 mph (65 km/h).
When position 1 is selected, all the other gears will be locked out.
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. This function applies in the Normal and Sport
modes.
The change occurs at a higher rotation speed and the gear remains
engaged for a longer period, if the control module senses that the
load does not drop. These change patterns avoid unnecessary gear
changes when, for example, driving on long inclines with a trailer,
and to prevent overheating of the transmission oil. This function cuts
in automatically if the oil becomes too hot, to protect the transmis-
sion from damage, and lowers the oil temperature.
The adaptive change pattern function is not activated at speeds over
93 mph (150 km/h). If a pattern is in operation when this speed is
exceeded, it will be maintained until the control module senses that
a more suitable one can be activated.
The adaptive gear-change pattern function is deselected when:
 Winter mode is selected.
 The engine is switched off.
 The load is reduced by so much that this function is no longer
required.
 “Automatic transmission fault indicator” appears on the
main instrument panel, see page 159.
NOTE Do not move the selector to position 3 at speeds in excess of
90 mph (150 km/h).
 Do not move the selector to position 2 at speeds in excess of
70 mph (110 km/h).
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166 Starting and drivingTraction Control SystemHow the system works The traction control system (TCS) is
designed to minimize 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.
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 OFF The indicator on the main instrument
panel will come on:
 If a fault has been detected and the
system has therefore been switched off.
 If there is a fault in the ABS system.
 If the system has been switched off man-
ually.
The indicator light will also come on for
4 seconds when the ignition key is turned to
ON, while an internal system check is per-
formed. TCS indicator The 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, the TCS helps to
imrove the safety of the car. This does
not mean that car can be driven faster.
The same care and prudence normally
applied should be displayed on corner-
ing and when driving on slippery roads.
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188 Car careEngineThe engine is a transverse four-cylinder
in-line engine with twin overhead camshafts
and 16 valves.
The engine is equipped with two balance
shafts that reduce engine vibration to a min-
mimum.
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. The effect occurs
twice in each revolution of the engine, coun-
teracting the vibration from its moving parts,
and at the same time reducing unwanted
engine noise.
The gearbox, located on the right (viewed
from the front), is integrated with the engine.
Engine familiesSaab cars imported into the United States
and Canada meet all applicable emission
control standards. The engine family and
appropriate tune-up specifications are iden-
tified on a label affixed to the left front inner
fender.
These engine families meet applicable EPA
Federal Standards, California State Stan-
dards and Canadian Federal Standards and
are equipped with the following systems:
• Sequential multiport fuel injection system.
 Three way catalytic converter.
 Crankcase emissions control system.
 Evaporative emission system.
Emission control
systemsThe systems for controlling emissions to the
atmosphere require regular checking and
adjustment at the intervals specified in the
service program.
In addition to meeting the exhaust emission
regulations and thereby helping to keep the
environment clean, a correctly tuned engine
will also give maximum fuel economy.
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215 Car care
When changing a wheel, take the tool kit out
first, then the spare wheel.
Changing a wheel
NOTE
To avoid damaging an alloy wheel with a
flat tire, this can be placed outside up in
the spare-wheel well but only while driv-
ing to the closest workshop.
A general rule is that all heavy loads must
be well secured in the luggage compart-
ment, see page 142.
WARNING
 The car jack is designed solely for use
in changing a wheel or fitting snow
chains. It must not be used to support
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.
 If light-alloy wheels have been fitted to
the car for several years and a change
is made to steel wheels, the threads
for the wheel bolts in the brake discs
should be cleaned before the thinner
steel wheels are fitted. The innermost
threads in the holes may be clogged
with sand, salt and rust so that the cor-
rect tightening torque cannot be
achieved.
IB1261IB1262
Spare wheel (under the carpet in the
trunk), Saab 9-3 Viggen
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216 Car careWhen it is time to raise the car, apply the
jack to one of the four jacking points (front or
rear) located beneath the sills.
If a floor jack is used it can be applied to the
standard jacking points used by the dealer
or centrally under the front of the engine
subframe. If the car is equipped with a trailer
hitch, the jack can also be placed under the
hitch. 1 Put the car in 1st gear (automatic trans-
mission: move selector to the P position)
and apply the parking brake.
Saab 9-3 Viggen: The front and rear
jacking points are located behind covers
that must be removed. See page 217.
2 Wind the jack up to a suitable height
before placing it under the recess in the
sill.
3 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.
4 Turn the jack handle clockwise until it
just begins to lift the car. 5 Remove the wheel cover (where appli-
cable). Loosen the wheel bolts by half a
turn.
6 Turn the jack handle to raise the wheel
clear of the ground. Remove the wheel
bolts and lift off the wheel.
7 Clean the contact surfaces between the
rim and hub.
8 Fit the wheel and screw in the bolts in the
sequence shown (opposite pairs).
Tighten the studs enough for the studs
and wheel to be seated correctly.
See page 218 for sequence.
9 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)NOTE Do not position the jack under the rear
axle or under the rear floor.
 Only use the points specified on
page 217.
IB924
Pos i ti o n for j ack
IB1538
Positioning the jack
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217 Car care
10 Recheck the wheel bolts after a few
miles.
Tightening torque:
Light-alloy wheels: 80 ft.lbs (110 Nm)
Steel wheels: 80 ft.lbs (110 Nm)
We advise against using wheels with open
wheel covers in winter, as the brake compo-
nents are then more exposed both to slush
and to road salt and grit.
Tire chains; see page 172. NOTE
When refitting wheel covers (where
applicable), make sure that the valve
protrudes through the hole in the wheel
cover.
NOTEDo not overtighten the bolts using an
impact wrench: not only can this damage
the wheels but it can also make it impos-
sible to undo the bolts using the wheel
wrench in the car’s toolkit.NOTESaab 9-3 Viggen: The minimum permis-
sible wheel diameter is 16”, due to the
size of the brake discs.
IB1174
Position for jack, Saab 9-3 Viggen. The front and rear jacking points are located behind
covers that must be removed. Remove the covers by taking hold of the lower edge and
pulling outwards. When replacing the covers, fit the catches along the top edge first and
then press home the cover.
IB1311
Jacking points for a floor jack.
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