2000 SAAB 9-3 sensor

81 Instruments and controls
The system uses five sensors:
 Outside-air temperature.
 Cabin-air temperature.
 Sun sensor.
 Blended-air temperature (located in the
heater unit).
 Coolant temperature.
The sun sensor is centrally located on the
dashboard panel between the defroster
nozzles. Note that if anything is placed over
the sun sensor the ACC system will not
function properly.
Condensation water When the A/C compressor is on, the incom-
ing air is dehumidified. The resulting con-
densation water is drained away through an
outlet under the car.
It is therefore perfectly normal for water to
be seen dripping from this outlet when the
car is parked. The warmer the ambient air
and the higher the humidity, the more con-
densation will form.
IB763
1 Sun sensor
2 Interior-temperature sensor
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88 Instruments and controlsUseful tips: If the ACC system is not functioning
satisfactorily the following should be tried
before you take the car to an authorized
Saab dealer.
 If the indication AUTO does not light up
after starting (the ignition must have been
switched off for at least 10 minutes): See
Cancelling programming of ACC.
 If you think that the ACC system is not
functioning satisfactorily you should:
1. Check that the cigarette lighter plug is
in its socket (since if the socket is empty
heated air can flow out and affect the
cabin sensor).
2. Recalibrate: See the section headed
Calibration.
 If the battery has been disconnected or
has died, the ACC system should be reca-
librated: See Calibration.
Programmed settings are not deleted if the
battery has been disconnected. Extinguishing the lighting in ACC See section Night Panel, page 63.
ACC - 9-3 Convertible When the soft top is folded down the ACC
system goes over to manual temperature
setting.
Between HI and LO there are eleven (0-10)
fixed temperature steps.
The system adjusts itself as follows
 AUTO is turned off.
 Heating, air distribution and fan speed are
not affected.
 Recirculation and electric rear window
are turned off.
 A/C assumes the same setting (ON/OFF)
as it had when the soft top was last folded
down.
All manual selections are possible with the
exception of electric rear window.
Saab recommends leaving the ACC setting
on ECON when the soft top is folded down
to improve fuel economy and unnecessary
running of the A/C compressor.
When the soft top is raised the system
reverts to the AUTO mode and the previous
set temperature.
IB795
ACC display with soft top folded down
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137 Starting and driving
Saab 9-3 Viggen: The Saab 9-3 Viggen has
a high-performance engine which means
that a certain amount of care should be
exercised, in particular when accelerating in
the lower gears. This is especially important
when the road surface is slippery to avoid
the driving wheels losing their grip
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 dead), the car
can be push started (manual gearbox
only) or started using jumper cables to a
donor battery. However, as soon as you have started the engine, it is important
that it runs on all cylinders. If it is misfiring,
allow it to idle for up to five minutes to give
it time to settle and run smoothly. If, after
this time, the engine still fails to run prop-
erly, 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.
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. NOTEIf 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.
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.
IB1315
Engine-management system with catalytic
converter 1 Engine control module
2 Oxygen sensor (lambda probe)
3 Catalytic converter
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150 Starting and drivingABS 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 regardless of the car’s speed and
load.
The ABS system has a built-in diagnostic
function which will switch on the ABS warn-
ing light if a fault is detected in the system
(see page 56). The ABS system will not reduce the braking
distance on loose gravel or on snow or ice
but, because the wheels cannot lock up,
some steering control is retained.
When the ABS system is working, i.e. mod-
ulation of the brake pressure is in progress,
the brake pedal will pulsate and a ticking
noise will be heard. All this is perfectly nor-
mal.
Press the pedal down hard (you cannot
press too hard) and steer the car to safety. Do not release the brake pedal before the
car has come to a halt or the danger is
past!
This is critical.
If the road is slippery, the ABS system will
operate even when only light pressure is
applied to the pedal. This means that you
can brake gently to test the condition of the
road and adapt your driving accordingly.
It is well worth practising the use of ABS
brakes on a skid pad or other suitable facil-
ity.
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.
IB877
ABS braking - confirmation that the sys-
tem is operating
IB878
Braking with ABS - evasive steering
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190 Car care
Relay holderUnder the instrument panel next to the steering wheel No. Amp Function
21 10 Manual A/C; soft top (Convertible)
22 15 Cruise Control; direction indicators
23 20 Soft top (Convertible); telephone
24 7.5 Radio
25 30 Central locking
26 30 Control module, engine management system; igni-
tion cassette
27 15 High beam flash; ACC
28 10 Engine management system
29 10 Right parking light; number-plate lighting
30 10 Left parking light
31 20 Reversing light; windshield wipers; headlight
beam-length adjustment
32 15 Fuel pump
33 15 Electric heating of rear seat
34 10 SID; control module; automatic transmission
35 15 DICE/TWICE; main instrument panel; interior light-
ing
36 10 Relay, starter
37 – –
38 25 Oxygen sensor (lambda probe)
39 – –Item Function
A Electric heating of rear seat
B Reversing light, cars with automatic transmission
C1 –
C2 Lock motor, trunk lid
D1 Rear wiper
D2 Rear-window washing
E Ignition switch
F–
G Windshield wipers (intermittent)
H Rear-window heating
IFuel pump
J–
KStart relay
L Main relay (injection system)
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232 Technical dataFollowing adjustments can be done
by the driver:Automatic Climate Control (ACC):
To alter the preprogrammed “AUTO“ start
up mode with your own preferences you can
manually select the desired settings for:
 Temperature.
 Fan speed.
Air distribution.
See “Programming I” on page 86 and “Pro-
gramming II” on page 87.Saab 9-3 Audio System:
The following functions can be adjusted by
the driver (see page 104):
 Maximum starting volume (when the
radio is switched on).
 Telephone volume (if the car is equipped
with a phone connected to the audio sys-
tem).
 Speed dependent volume (volume
increases or decreases with vehicle
speed).
 Loudness.Alarm System:
The glass breakage sensor can be tempo-
rarily disabled, see page 36.
Daytime Running Lights:
To disable, turn off the ignition and pull out
fuse 15, see page 189.
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236 IndexTemperature gauge
______________ 60
Textile carpeting, cleaning
________ 200
Through-load hatch
______________ 128
Tie-down eyes
_________________ 129
Tipping the rear seat
_____________ 125
Tire pressures
__________________ 192
Tires and wheels, sizes
__________ 227
Tools
_________________________ 130
Touching up paintwork
___________ 202
Towing a caravan or trailer ________ 156
Towing the car
_________________ 160
Trailer hitch load ________________ 158
Transmission, automatic
__________ 141
Transporting the car
_____________ 160
Traveling abroad
________________ 165
Trionic
________________________ 170
Trip computer, SID
_______________ 62
Trip meter
______________________ 59
Trunk
_________________________ 125
Trunk lid lock, Convertible
_________ 50
Trunk, Convertible
_______________ 50
Turbo gauge
____________________ 60
Turn signal
_____________________ 72
UUpholstery and trim
______________ 200
Upholstery and trim, care of
_______ 200
Useful tips on starting
____________ 136
Useful tips, ACC
_________________ 88
VVanity mirror
___________________ 124
WWarning labels
___________________ 7
Warning light, AIR BAG (SRS)
______ 24
Washer fluid
___________________ 179
Washer jets ____________________ 180
Washers
_______________________ 74
Washing ______________________ 201
Waxing and polishing
____________ 202
Wear indicators, brake pads
_______ 140
Wear indicators, tires
____________ 195
Wheels
_______________________ 192
Wheels and tires, sizes
___________ 227
Window glass sensor, car alarm
_____ 36
Windshield washers
______________ 74
Windshield wipers
________________ 74
Winter driving
__________________ 154
Wiper blades ___________________ 179
Wipers
_________________________ 74
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