sensor SAAB 9-5 2002 User Guide

70 Instruments and controlsWipers and washers There are three intermittent wiper positions.
Moving the control stalk to the
spring-loaded position between 0 and 2 will
produce a single sweep of the wipers.
The wipers are designed for optimal clean-
ing at all driving speeds. At higher speeds,
it may be possible to detect a slight ”sweep-
ing” sound. This may be due to the
increased air pressure on the blades at
higher speeds.Headlight washersIf dim-dipped beam is on, the headlights are
washed every seventh time the windshield-
washers are used or if 2 minutes have
elapsed since the windshield was last
washed. If the headlights are not on they are
only washed the first time the windshield is
washed. The headlight washers cannot be
activated separately.
The headlight washers are of the high-pres-
sure type, which means that other parts of
the car may become wet if you activate the
washers while the car is stationary.Rain sensing wipers (option)
The rain sensor automatically controls the
windshield wipers. The sensor is located on
the windshield beside the rearview mirror.
The system varies between single sweeps
of the windshield and continuous wiping
depending on how much water or snow
there is on the windscreen.Activate the system by lifting the control
stalk to position 1. The wipers make one
sweep for reference to see how much water
and snow is on the windshield. In future, the
sensor compares the amount of water and
snow on the windshield with this reference
value. When the engine has been switched
off, the control stalk must be moved to posi-
tion 0 and back to position 1 to reactivate the
sensor.
Set the sensitivity using the control on the
wiper stalk (the same control as used for
wiper delay on cars not fitted with a rain sen-
sor). The sensor has three sensitivity set-
tings. It is most sensitive when in the upper-
most position (1). When a higher degree of
WARNING
To avoid personal injury, turn the rain
sensor off if the ignition is ON when clear-
ing snow and ice from the windscreen.
NOTETo avoid damaging the windshield
wipers, turn the rain sensor off before
washing the car in an automatic carwash.
IB359
0
41
2
3
0 OFF
1 Intermittent operation
2 Low speed
3 High speed
4 Washers
12
IB569
Control for setting wiper delay1 Long delay
2 Short delay
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71 Instruments and controls
sensitivity is selected, the wipers make one
sweep of the windshield for reference.
The rain sensor has a daylight and a night
time mode. The sensor measures the
amount of available light and automatically
selects the appropriate mode. The sensor is
more sensitive at night. The function of the
rain sensor is impaired by dry snow.Rear-window wiper (9-5 Wagon)The rear-window wiper and washer are
operated with the same stalk switch as
used for washing and wiping the windshield
and headlights.
This stalk has two additional switches,
ON/OFF and .
The ON position provides intermittent wip-
ing.
The position provides washing and
wiping. After a few sweeps the wiper stops
or reverts to intermittent wiping, if this has
been chosen. About 15 seconds after com-
pletion of the washing/wiping of the rear
window, the wiper makes a single sweep to
wipe away any remaining washer fluid.
A spring-loaded position between the OFF
and ON positions allows for a single sweep
of the rear-window wiper.
Intermittent wiping of the rear window
occurs when reverse gear is engaged if the
windshield wipers are in position 1, 2 or 3,
see page 70.
2 1
IB1207
Rear-window wiper1 Intermittent wiping
2 Washers
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73 Instruments and controls
The system has five sensors:
 Outdoor temperature sensor.
 Interior temperature sensor.
 Sun sensor (mounted on top of the
fascia).
 Two blended-air temperature sensors
(mounted inside the front floor vents).
Caution If anything is placed over the sun
sensor, the ACC system will not function
properly.
Panel vents The panel vents swivel universally, so that
air can be directed as desired. In winter, for
instance, the outer vents can be directed
onto the door windows for enhanced
demisting.
The flow of air through the panel vents can
be controlled individually for each vent by
means of the adjacent control. The climate
control system works best if the panel vents
are open. If you find the air cold or that it is
drafty, start by directing the air away from
the body. If the center vent is aimed up, it will
cool the interior temperature sensor and
you may need to adjust ACC up or down,
depending upon temperature desired.
IB362
Panel vent
IB368
1
2
1 Interior-temperature sensor
2 Sun sensor
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81 Instruments and controls
Condensation When the A/C system is running, the intake
air is dehumidified, and the resultant con-
densation is drained off through two outlets
underneath the floor of the car, in the vicinity
of the front doors.
It is therefore perfectly normal for water to
be seen dripping from these outlets when
the car is parked. Greater amounts of con-
densation will result in warmer, more humid
ambient air.
Formation of ice and mist in
extremes of weather It is only in the most extreme conditions that
icing and misting of window glass are likely
to be a problem, e.g. in torrential rain or
severe cold coupled with high relative
humidity, or when passengers are perspir-
ing heavily or wearing wet clothes.
The following measures are recommended
if such problems should occur:
1 Select AUTO and 70
°F (21°C) for both
temperature zones.
2 Select Defroster.
If this is not enough...
3 Increase the fan speed.
If this is not enough...
4 Select a higher temperature.
The following measures are recommended
if the occupants feel that it is cold and drafty
in the car:
1 Make sure that all the air vents are fully
open, including the center rear vent.
If this is not enough...
2 Direct the air flow away from the body
(but not towards the interior temperature
sensor).
If this is not enough...
3 Raise the temperature setting a degree
or two. If this is not enough...
4 Lower the fan speed.
Fault diagnosis and maintenance,
see page 231.
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124 Interior equipment and trunkCars equipped with a programmable
driver’s seat also have the ability to angle
the passenger’s mirror down when revers-
ing, e.g. for a better view of the curb.
After selecting reverse, press the tiny button
adjacent to the doormirror switch to tilt the
mirror. The mirror will be reset automatically
when reverse gear is deselected.
Rearview mirror with auto dimming
functionThe interior rearview mirror has two sen-
sors, one forward-facing and one rear-fac-
ing.
The system is activated when the for-
ward-facing sensor detects that it is dark
outside and the rear-facing sensor detects,
for example, if the car following has not
dimmed its headlights. The rearview mirror
is then darkened to prevent the strong light
source from dazzling the driver. This dark-
ening is stepless.
The mirror returns to its normal state when
the strong light source diminishes.
The auto dimming function can be turned
OFF with the switch on the lower edge of the
rear-view mirror.
NOTE
Towing a trailer can cause the system to
malfunction, as the rear-facing sensor may
sense light from the trailer.
IB568
Button for angling passenger’s mirror
down on reversing
IB1284
1
23
1 Forward-facing sensor
2 ON/OFF switch, auto dimming function
3 Rear-facing sensor
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150 Starting and driving
AON 93. One of the advantages of the
system is that it enables the engine to
be run safely on lower-grade fuel,
although not lower than AON 87.
 The maximum boost pressure is
adjusted automatically to the knocking
or pinging tendency of the engine.
Occasional, short-lived knocking when
the engine is under a heavy load is per-
fectly normal; the extent will depend on
the grade of fuel in the tank.
 Isolated instances of knocking are
more likely to occur with low-octane
fuel. This controlled form of knocking,
followed by a reduction in the boost
pressure, is a sign that the wastegate is
functioning and is perfectly safe for the
engine.
Important considerations with cata-
lytic convertersThe catalytic converter is an emission-con-
trol device incorporated in the car’s exhaust
system. It consists of a metal canister with a
honeycomb insert, the cells of which have
walls coated in a catalytic layer (mixture of
precious metals).
To ensure that the catalytic converter con-
tinues to function properly, and also to avoid
damage to the converter and its associated
components, the following points must be
observed:
 Have the car serviced regularly in accor-
dance with the service program. The fuel
and ignition systems are particularly
important in this context.
 Always be alert to any misfiring of the
engine (not running on all cylinders) and
any loss of power or performance. At the
first sign of a malfunction, reduce speed
and take the car to an authorized Saab
dealer as soon as possible.
 If the engine fails to start (in very cold
weather or if the battery is flat), the car can
be push started (manual gearbox only) or
started using jumper cables to a donor
NOTEIf constant knocking occurs every time a
load is put on the engine, this indicates a
malfunction in the system.
Have the car checked without delay by an
authorized Saab dealer.
WARNING
If the engine is being run with the car on a
rolling road or dynamometer, to ensure
adequate cooling, air must be blown into
the engine compartment and under the
car at a rate equivalent to the ram-air
effect that would be obtained at the corre-
sponding road speed.
NOTEUse only unleaded gasoline. Leaded gas-
oline is detrimental to the catalyst and
oxygen sensor and will seriously impair
the function of the catalytic converter.
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151 Starting and driving
battery. However, as soon as you have
started the engine, it is important that it
runs on all cylinders. If it is misfiring, allow
i t t o i d l e f o r u p t o f i v e m i n u t e s t o g i v e i t t i m e
to settle and run smoothly. If, after this
time, the engine still fails to run properly,
turn off the engine and get in touch with an
authorized Saab dealer for advice.  Never park the car on dry grass or other
combustible material. The catalytic con-
verter gets very hot and could therefore
start a fire.
 Never drive off if the engine is misfiring.
 If you jump start the car when the engine
is already up to normal temperature, the
engine must start to run on all cylinders.
Stop jump-starting if the engine fails to
start immediately.
Failure to follow these directions could
result in the catalytic converter and associ-
ated components being damaged, and
could represent a breach of the warranty
conditions.
3.0t V6: When starting the engine from cold
an electrical pump is activated. This pump
forces air into the exhaust system so that
the catalytic converter will reach its normal
operating temperature more rapidly. The
pump is active for 30-60 seconds.
Fuel filler flapThe fuel filler flap is opened by means of a
button on the driver’s door. The flap is
spring-loaded, so it opens slightly automat-
ically when released.
NOTEIf the car runs out of fuel, it is possible for
air to get into the fuel system. If this
happens, the catalytic converter may
overheat and be damaged.
IB1289
2
2
1
3
3
Oxygen-sensor-controlled
injection system 1 Engine control module
2 Oxygen sensor (lambda probe)
3 Catalytic converters
B466
Button for releasing filler flap
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165 Starting and driving
BrakingTo avoid the brakes becoming overheated,
(e.g. when negotiating long descents with a
drop of several hundred feet), select a low
gear to use the braking effect of the engine.
If the car has automatic transmission, move
the selector lever to position 1 or 2.
When driving fast, you can help to prolong
the life of the brakes by thinking ahead and
braking harder for short periods, rather than
braking more moderately over long
stretches. Brake pad wear indicatorsThe outboard brake pads on the front
wheels incorporate pad-wear indicators.
When the lining is down to 3 mm, the pad
will produce a screeching, squealing or
scraping noise when the brakes are applied.
New pads should be fitted without delay.
Brake pads should only be replaced by
an authorized Saab dealer.
To ensure optimum brake performance,
it is recommended that you use only
Saab original brake pads.

ABS brakesABS (antilock braking system) modulates
the brake pressure to the respective
wheels. Wheel sensors detect if a wheel is
about to lock, and the control module
reduces the pressure to that wheel and then
increases it once more until the tendency is
detected again.
The brake system is equipped with an Elec-
tronic Brake-force Distribution device
(EBD), which distributes the brake pressure
between the front and rear wheels, in such
a way as to achieve optimum braking perfor-
mance irrespective of the car’s speed and
load.
The ABS system has a built-in diagnostic
function which will switch on the Anti-lock
brake warning light if a fault is detected in
the system (see page 52).
WARNING
 It is prudent to try your brakes from
time to time, especially when driving in
heavy rain, through water collected on
the road, in snow, on a wet road sur-
face or in salty slush. In such condi-
tions, the brakes may take longer than
normal to take effect. To rectify this,
touch the brake pedal periodically to
dry the brakes out.
 The same applies after the car has
been washed or when the weather is
very humid.
 Avoid parking the car with wet brakes.
Before parking, and if the traffic condi-
tions allow, brake quite heavily so that
the brake discs and pads warm up and
dry.
 The brakes are power assisted and it
should be kept in mind that the servo
unit only provides the power assis-
tance when the engine is running.
 The brake pressure required when the
engine is off,(e.g. when the car is on
tow) is roughly four times the normal
pedal force required. The pedal also
feels hard and unresponsive.
WARNING
 The additional safety afforded by the
ABS system is not designed to allow
drivers to drive faster but to make
normal driving safer.
 To stop as quickly as possible, without
loss of directional stability, whether
the road surface is dry, wet or slippery,
press the brake pedal down hard-
without letting up, declutching
simultaneously, and steer the car to
safety.
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167 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.
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 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
In normal driving, the TCS system will
help to improve the safety of the car, but
it does not mean that the car can be
driven faster. The same care and pru-
dence normally applied should be dis-
played on cornering and when driving on
slippery roads.
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168 Starting and drivingTurning the TCS off The TCS is switched on automatically when
the engine is started.
The system can be switched off manually by
the TCS button, whereupon on the
main instrument panel will come on. The
TCS system cannot be switched off if the car
is travelling faster than 35 mph (60 km/h).
It may be necessary to switch off the system
if the car has become bogged down, for
instance. Press TCS to switch it on again.
If a fault is detected in the ABS system, the
TCS will be switched off automatically.
The cruise-control system will automatically
be disengaged after one second if it is active
when the TCS starts to operate.
Electronic Stability
Program (ESP)(option/certain models only)The Electronic Stability Program employs
both the antilock braking system (ABS) and
the traction control system (TCS). It is a
safety system that helps the driver to stabi-
lize the car in unusual circumstances that
can otherwise be difficult to handle.How the ESP system worksThe Electronic Stability Program can help to
prevent the car from skidding by braking
one or several wheels independently of the
driver. The engine output is then also
reduced to prevent the driving wheels from
spinning. The car has sensors that measure
wheel speed, yaw acceleration, lateral
acceleration, steering wheel position and
braking pressure. The values provided by
these sensors are used to calculate the
actual direction of the car. If this direction
does not agree with that intended by the
driver, calculated from the steering wheel
position, the ESP is engaged.
ESP improves the driver’s chances of
retaining control over the car in critical situ-
ations.
ESP OFFThe light in the rev counter comes on
if:
 A fault has been detected and the system
has therefore been switched off.
 The system has been switched off manu-
ally.
 When the ignition key is turned to the ON
position, the lamp is lit for about four sec-
onds while the system undergoes a
self-test.
IB478
IB1847
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