2009 SAAB 9-5 brake sensor

161 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 unre-
sponsive.
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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163 Starting and driving
Electronic Stability
Program (ESP
®)
The system employs both the antilock brak-
ing system (ABS) and the traction control
system (TCS). It is a system that helps the
driver to stabilize the car in unusual circum-
stances that would otherwise be more diffi-
cult to handle.
How the ESP
® system works
The system 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.
The ESP
® system improves the driver’s
chances of retaining control over the car in
critical situations.
To ensure that the system works as
designed, the dimensions of all four tires
must be the same.
WARNING
When driving normally, the ESP
® system
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.
The illustration shows how the system
brakes one or more wheels (and with var-
ying braking force for each wheel) in order
to increase the car’s chances of following
the direction in which the driver wants to
drive.
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216 Car care and technical informationFuse panel in instrument panel
# Amp Function
A 30 Trailer lights
B 10 Automatic transmission
C 7.5 Electric door mirrors; DICE: manual beam length
adjustment3
1 15 Brake lights; Park Brake Shift Lock (cars with auto-
matic transmission)
2 15 Reversing lights
3 10 Parking lights and taillights, left
4 10 Parking lights and taillights, right
5 7.5 DICE / TWICE
6 30 Electric windows, right; trailer charging
6B 7.5 Brake lights, trailer
7 10 Engine injectors
8 15 Trunk lighting; trunk lock; door lighting; parking
assistant3; SID
9 15 Audio System; CD changer3
10 15 Heating, rear seat3; moonroof3, remote control
receiver
11 30 Electrically adjusted passenger seat3
12 7.5 Automatic transmission3
13 20 Audio System, amplifier
14 30 Ignition system, engine
15 20 Fuel pump
16 20 DICE (direction indicators)
16B – OnStar3
17 20 Engine-management system; main instrument;
DICE/TWICE
18 40 Door-mirror heating; rear-window heating
19 10 OnStar3; Telematics3
20 15 ACC; interior lighting; rear fog light; high beam flasher
21 10 Audio System; rear-view mirror; load angle sensor3;
navigation3; Cruise Control3
22 40 Interior fan
23 15 Central locking; navigation3; door mirror memory3
24 20 Main light switch
25 30 Electrically adjustable driver’s seat
IB2439
BC123456 A
14
121110987
13
6B
1516
2324
222120191817
16B25262728293031
3635343332
393837
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242 Car care and technical informationWashing the carWash your car frequently. To facilitate
cleaning, a suitable detergent can be added
to the water, which should be lukewarm.
Saab offers a full line of car care products,
including car wash, for the care of your vehi-
cle. See your dealer for available products
or visit www.saabcatalog.com (U.S. resi-
dents only).
Do not use a pressure washer at close
range on stone chip damage, scratches or
other damage to the paintwork. The paint
can otherwise start to flake.
Remove any bird droppings without delay,
as these can discolor the paintwork and
prove difficult to polish out.
Use a soft cloth moistened with methyl alco-
hol to remove splashes of tar or asphalt. Do
not use strong cleaners, as these can dry
out the paintwork.
The underside of the car also needs wash-
ing regularly, and this should be done extra
thoroughly at the end of winter. Clean the
underside of the car by hand if the car is
usually washed in an automatic car wash
without special facilities for underbody
cleaning.
Never wash or leave the car to dry in the
sun, but wipe it dry with a chamois leather
immediately after washing to avoid smears
and streaks.
Clean the window glass inside and out using
a high quality window cleaner. This is partic-
ularly important when the car is new, as
upholstery and trim have a tendency to
sweat a little at first.
Keep the glass well cleaned, as this helps to
prevent misting.

NOTICEOnly use liquid detergent when cleaning
the plastic lenses of the front and rear
lights. Do not use mechanical cleaning.
Rinse off the detergent immediately, oth-
erwise cracks may form in the plastic
lenses.
NOTICE The door mirrors must be fully
retracted before the car enters an
automatic car wash.
 Remove fixed antennas, e.g. for
mobile phone, before putting car
through an automatic car wash.
 Try your brakes on leaving a car wash.
Wet brake discs may reduce the per-
formance of the brakes.
 Cars with Saab Parking Assistance:
Do not spray the sensors or closer
than 8 in. (20 cm) to the sensors with
a pressure washer, as this can
damage them.
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