2005 SAAB 9-5 cooling

53 Instruments and controls
This light will come on together with if
the engine oil pressure is dangerously low.
If the light flashes or comes on while you are
driving, stop the car, switch off the engine
and check the engine oil level (see
page 186).
This light will come on together with if
the battery is discharging. If it comes on
while you are driving, stop the car as soon
as possible and switch off the engine.
Check the alternator drive belt (see
page 194). If the belt has broken, the engine
may overheat (cooling system will not func-
tion properly), the battery will not be char-
ged, the A/C compressor will not run and
power assistance for the steering will be
lost.This light will come on together with if
there is insufficient brake fluid in the reser-
voir (see pages 189).
If the ABS warning light is on at the same
time, the ABS system may be inoperative
because of a fault (see ”Anti-lock brake war-
ning”, page 54).
Warning, oil pressure
(engine oil)
NOTICE
Under no circumstances must the car be
driven when this warning light is on. Low
oil pressure can result in serious engine
damage.
Warning, charging
Brake warning light
WARNING
Never drive the car when these warning
lights are on. Danger of brake failure!
Have the brake system checked at once
by an authorized Saab dealer.
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75 Instruments and controls
Temperature control The cabin is divided into two temperature
zones:
• The driver’s zone
 The passenger zone (front and rear
seats)
The desired temperature can be set bet-
ween 58 and 82°F (15 and 27°C). In addi-
tion, there are also HI and LO settings (see
below). The HI and LO settings for the pas-
senger zone can only be selected if they are
also selected for the driver’s zone.
The displayed temperature is not the abso-
lute temperature but corresponds to the
comfort level normally experienced at that
temperature after allowance has been
made for the air flow, relative humidity, solar
radiation, etc., currently prevailing inside
the car.
 The most usual temperature setting is
64–76°F (18–24°C), depending on perso-
nal preference and what clothing is worn.
 To allow the system time to adjust, chan-
ges in the temperature setting can only be
made in steps of 2°F (1°C).
 Once the desired climate has been achie-
ved, the rear center vents can be closed
to prevent warm air being distributed at
face height.
Settings when HI
selected:
 Maximum heat
 Air distribution to windshield and floor
 Recirculation OFF (even if manually
selected before)
 Fan: high speed
 Settings shown on ACC display
Settings when LO
selected:
 Maximum cooling (A/C compressor will
run even if ECON manually selected
before)
 Air distribution through panel vents
 Fan: maximum speed
 Recirculation ON
 Settings shown on ACC display
IB369
Air vent at rear side window
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76 Instruments and controlsFunctionsPressing AUTO will cancel all manual settings.
If a manual function is selected, it will be locked in but other functions
will be controlled automatically.
The selected temperature is always maintained automatically.
Temperature, air distribution, fan speed and
recirculation will all be controlled automatically.
In falling temperatures the A/C compressor is
switched off at 32°F (0°C).
In rising temperatures the A/C compressor is
switched on at 41°F (+5°C).
If at the start the outside air temperature is 32–41°F
(0 – +5°C), the A/C compressor is switched off.
 Pressing AUTO once will cancel all previous
manual selections.
 Pressing AUTO a second time will result in all the
automatically selected settings being displayed. When the engine is started, the A/C system is in
AUTO mode, apart from any currently set program,
see page 79 and 80).
IB370
A/C compressor OFF.
No cooling of inlet air. Temperature, air distribution
and fan speed still under automatic control.
ACC system OFF.
Fa n OF F.
A/C compressor OFF.
War m air OFF.
Air-distribution selections locked in current settings.
Recirculation can be selected manually.
Pressing the AUTO button will put the system into
automatic mode.
Pressing the OFF button again will result in the sys-
tem reverting to any previous manual settings.
IB371IB372
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77 Instruments and controls
The rear-window and door-mirror heating is
controlled manually. Switch off the heating as soon as the rear window
is clear, to avoid imposing a heavy load on the bat-
tery longer than necessary. Note, however, that the
heating will go off automatically after 2–10 minutes
(depending on the outdoor temperature) or sooner
if the voltage in the electrical system falls below
10 V
.
The ACC system can be programmed to switch on
the heating automatically when the outdoor temper-
ature is below 41°F (+5
°C) and the temperature
inside the car is below 50°F (+10
°C) (see ”Program-
ming I and II”, on pages 79 and 80).
Recirculation is selected automatically for effective
cooling, but it can also be switched on/off manually.
Although recirculation does not substantially affect
the air quality, it is useful to prevent unpleasant
smells or fumes being drawn into the car from
outside.
IB373IB374
To increase the fan speed in steps.
If, after being off, the ignition is switched on but the
engine is not started, the fan will run at low speed
until the engine is running.
To decrease the fan speed in steps.
If the fan is set to 0, the A/C compressor will cut out
and ECON will appear on the display.
If, after being off, the ignition is switched on but the
engine is not started, the fan will run at low speed
until the engine is running.
IB375IB376
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136 Starting and drivingImportant
considerations for
drivingThe engine-management system in the
Saab 9-5 is called Saab Trionic T7. The
system manages the ignition, fuel injection
and turbo boost pressure.
The Trionic T7 system developed by Saab
is an intelligent engine-management
system designed to achieve optimum driv-
ability under differing driving conditions.
The system makes adjustments automati-
cally, for instance, if the car is being driven
at altitude (oxygen-deficient air), for differ-
ent grades of fuel (AON 87–93) and for dif-
ferent load conditions.
1 Starting and driving
 Refrain from using full throttle before
the engine has warmed up (before
needle in mid-range on temperature
gauge).
 A safety function prevents the engine
from revving faster than 6,000 rpm by
limiting the induction air.
2 Stopping the engine
 Do not rev the engine immediately
before switching it off – stop the engine
when it is idling.
3 Regulating the boost pressure
 One of the advantages of boost pres-
sure regulation is that the engine can
also be run safely on gasoline with a
lower octane rating, although not lower than AON 87. However, engine perfor-
mance will fall slightly and heavy load-
ing and laboring should be avoided. For
optimum performance, use the recom-
mended grade of fuel.
 The maximum boost pressure is adjus-
ted automatically to the knocking or
pinging tendency of the engine. Occa-
sional, 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.

NOTICE If the engine sounds strange there is a
fault in the system. Have the car
checked without delay by an authori-
zed Saab dealer.
 The use of fuel with too low an octane
rating can cause serious engine
damage.
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.
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161 Starting and driving
2 Wait until the needle has dropped back
to indicate normal temperature (roughly
midway, in the white zone) before stop-
ping the engine. If the coolant needs top-
ping up, unscrew the cap on expansion
tank
carefully
.
Top up, as necessary, ideally with a
50/50 mixture of Saab-approved coolant
and water. If only water is available, use
that, but remember to have the coolant
mixture checked as soon as possible.
3 As soon as possible, have the cooling
system checked by an authorized Saab
dealer.
Towing a trailer
Trailer hitch attachmentTrailer hitch attachments are available as
accessories. These are designed for a max-
imum trailer weight of 3500 lbs. (1588 kg),
see also page 253.
Use only the electrical trailer hitch socket
provided in the trailer hitch kit.
Saab recommends:
 Use a Saab original hitch kit attachment
which is designed and tested by Saab.
 Consult your Saab dealer regarding the
appropriate hitch kit for your car.
WARNING
 Exercise care when opening the hood
if the engine is overheated. Never
remove the expansion tank cap com-
pletely when the engine is hot.
 The cooling system is pressurized -
hot coolant and vapor can escape.
These can cause injury to your eyes
and burns. Open the cap slowly to
release the pressure before
removing it.
WARNING
 When towing a trailer, do not attempt
to negotiate a hill having a gradient in
excess of 15 %. The weight distribu-
tion over the front wheels of the car will
be insufficient to prevent wheelspin,
making further progress impossible.
 In addition, the parking brake may not
always be able to hold the car and trai-
ler securely, with the result that the
wheels can start to slide downhill.
 Always apply the trailer’s handbrake
when unhitching it. There is otherwise
a risk of personal injury or damage to
the bumper should the trailer start to
roll.
NOTICEUse only a genuine Saab trailer hitch and
wiring, since other wiring methods can
cause expensive damage to the car’s
body and electrical system.
Consult an authorized Saab dealer for
guidance on how to connect the trailer
hitch electrical system.
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162 Starting and drivingTrailer weightMaximum recommended trailer weights for
different gradients, with a view to comfort
and drivability for manual and automatic
cars, are shown on the drawing. Make sure you are familiar with the law
regarding speed limits for towing, maxi-
mum trailer weights, trailer-braking
requirements, and also any special
driving-licence provisions
(see also page 253
).
The specified trailer weights and gradients
assume that the journey starts at the hill and
therefore apply only to short periods.
Recommendations for driving in hilly
terrainThe following time limits are based on the
capacity of the cooling system in warm
weather, i.e. approximately 86
°F (30
°C).
The following time limits are based on the
capacity of the cooling system in hot
weather, i.e. approximately 104
°F (40
°C).
Gradient
of hill, % Maximum
trailer weight,
lbs. (kg)Maximum dura-
tion, minutes
6–7 3300 (1500) unlimited
8–9 3300 (1500) 15 max
10–15 1870 (850) 15 max
Gradient
of hill, % Maximum
trailer weight,
lbs. (kg)Maximum dura-
tion, minutes
6–7 2000 (900) unlimited
8–9 2000 (900) 15 max
10–15 1000 (450) 15 max.
Maximum recommended trailer weights
for different gradients
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188 Car care and technical informationTransmission fluidManual transmission Check and top up the fluid in accordance
with the service program.Automatic transmissionCheck and top up the fluid in accordance
with the service program.
Coolant The expansion tank is transparent to facili-
tate checking of the coolant level.
When the engine is cold, the coolant must
not lie over the KALT/COLD mark on the
expansion tank.If the message
”Coolant level low.
Refill.”
is displayed on the SID, check the level of
fluid in the expansion tank.
Top up, as necessary, with equal parts of
clean water and Saab-approved coolant.
If the expansion tank is empty when coolant
is added, run the engine to normal tempera-
ture and top up again, as necessary.
WARNING
 Proceed with caution if the radiator is
boiling when you open the hood.
Never remove the expansion-tank
filler cap when the radiator is boiling.
 The cooling system is pressurized –
hot coolant and vapor can escape
when the filler cap is released. These
can cause injury to your eyes and
burns. Loosen the cap carefully, and
let the engine cool before removing
the cap.
 Exercise care when adding coolant.
Coolant on hot surfaces constitutes a
fire risk.
IB1338
Coolant expansion tank
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