sensor SAAB 9-5 2003 User Guide

63 Instruments and controls
Speedometer
(U.S. speedometer shown)The speedometer receives signals from the
wheel sensors in the ABS system.
If the NIGHT PANEL mode has been
selected, the scale will be illuminated up to
87 mph (140 km/h). The remainder of the
scale will be illuminated if the speed of the
car exceeds 84 mph (135 km/h).
Fuel gauge Fuel-tank capacity, 18.5 US gal. (70 liters).
The fuel gauge shows the amount of fuel left
in the tank. When this is down to about
2.5 gal. (10 liters), a warning light on the
main instrument panel will come on (see
page 59).
Use the Saab Information display (SID) to
check the approximate distance that can be
traveled on the remaining fuel
(see page 65).
Temperature gauge The temperature gauge shows the temper-
ature of the coolant. The needle should be
in the middle of the scale when the engine
is at normal operating temperature.
If the needle approaches the red zone,
which can occur in very hot weather or when
the engine is under a heavy load, drive in the
highest gear possible, keep the engine revs
low and avoid shifting down.
If the needle enters the red zone, the
warning light will come on and an alarm
chime will sound.
2030405060
70
80
90
100
110
120
130
140
150
160
240
260220200180160
140 120 100
80
60
40
20
10
IB1851
IB345
IB343
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75 Instruments and controls
Wipers 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 low beam is on, the headlights are washed
every fifth time the windshield washers are
used or if 2 minutes have elapsed since the
windshield was last 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 windshield.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-
WARNING
Turn the rain sensor off if the ignition is
ON when clearing snow and ice from the
windshield, to avoid personal injury.
NOTICETo 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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76 Instruments and controlsmost position (1). When a higher degree of
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 75.
For how to adjust the rear window washer
jet on the 9-5 Wagon, refer to page 212.
2 1
IB1207
Rear-window wiper1 Intermittent wiping
2 Washers
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78 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)
Note If anything is placed over the sun sen-
sor, the ACC system will not function prop-
erly.
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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86 Instruments and controlsCondensation 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 242.
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129 Interior equipment and trunk
Rearview mirrors with auto dimming
function (accessory/option)The autodimming is activated and deacti-
vated with a short push on button 2.
If the mirror is equipped with Garage Door
Opener (option) the letter 1 is displayed on
compass bearing display briefly when auto
dimming is activated. When deactivating
the letter 0 is displayed.
The interior rearview mirror has two sen-
sors, one forward-facing and one rear-fac-
ing. They also activate and deactivate the
auto dimming feature on door mirrors.
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 mirrors
are then darkened to prevent the strong light
source from dazzling the driver. This dark-
ening is stepless.
The mirrors return to their normal states
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.
1 Forward-facing sensor
2 ON/OFF switch, auto dimming function
3 Rear-facing sensor
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156 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
NOTICE If the engine sounds strange there is a
fault in the system. Have the car
checked without delay by an autho-
rized Saab dealer.
 The use of fuel with too low an octane
rating can cause serious engine dam-
age.
WARNING
If the engine is being run with the car on a
rolling road or dynamometer, longer than
for a standard state emission inspection,
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 corresponding road speed.
NOTICEUse 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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157 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.
NOTICEIf 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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173 Starting and driving

ABS brakes
ABS (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.
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
being towed) is roughly four times the
normal pedal force required. The
pedal also feels hard and unrespon-
sive.
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 (do not pump the
pedal), declutching simulta-
neously, and steer the car to safety.
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175 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 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
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.
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