2009 SAAB 9-3 brake sensor

173 Starting and driving
All-wheel drive (XWD)3Essentially, the system consists of a PTU
(Power Take off Unit), propeller shaft, RDM
(Rear Drive Module which contains an elec-
tronically controlled plate clutch, final drive
gear and differential) and driveshafts. This
system enhances driving characteristics
and stability. The system is always active
and cannot be deactivated. It works
together with the ESP system and the
engine and transmission control modules.
When driving at a constant speed, approx.
95% of the torque is distributed to the front
wheels and approx. 5% to the rear wheels.
The torque is distributed steplessly and
instantaneously between the front and rear
wheels, depending on the driving condi-
tions. If the car is fitted with eLSD (electron-
ically controlled plate clutch between the
rear wheels), the torque can also be distrib-
uted individually to the relevant rear wheel.For optimum system function, the car’s tires
should not have varying degrees of wear.
When the XWD system requires service,
the following message is shown on the SID:
When the service message is displayed,
the XWD system may have limited func-
tionality (or be completely disabled in
some cases, i.e. the car switches to
front-wheel drive). Contact a workshop
for information. We recommend that you
contact an authorised Saab dealer.
Traction Control
System (TCS)Anti-spin systemHow the system worksThe 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 speed sensors to
determine whether any wheel is spinning. If
any wheel is spinning, this is reduced on
all-wheel drive cars initially by changing the
torque distribution, secondly by reducing
the engine torque, and thirdly with the aid of
the wheel brakes. On front-wheel drive cars,
wheelspin is reduced initially by reducing
the engine torque, and secondly with the aid
of the wheel brakes. Service XWD.
WARNING
When driving normally, the TCS system
helps to improve the car’s stability, and
driveability under slippery road and
extreme driving conditions. The TCS
must not be regarded as a system to
enable the driver to maintain higher
speeds. The same precautions must be
adopted as normal for safe cornering and
driving on slippery roads.
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175 Starting and driving
Electronic Stability
Program ESP
®
Anti-skid system
The ESP
® system employs both the
antilock braking system (ABS) and the trac-
tion control system (TCS). It is a system that
helps the driver to stabilize the car in
unusual circumstances that can otherwise
be more difficult to handle.
How the ESP
® system works
The ESP
® 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 pre-
vent the driving wheels from spinning. The
car has sensors that measure wheel speed,
yaw rate, lateral acceleration, steering
wheel position and braking pressure. The
values provided by these sensors are used
to calculate the actual direction of the car,
the intentions of the driver and whether the
ESP
® system should be engaged.
If this direction does not agree with that
intended by the driver, calculated from the
steering wheel position, the ESP
® system is
engaged.
The ESP
® system improves the driver’s
chances of retaining control over the car in
a critical situation.
WARNING
When driving normally, the ESP
® system
helps to improve the car’s stability and
maneuverability under slippery road and
extreme driving conditions. The ESP
®
system must not be regarded as a system
to enable the driver to maintain higher
speeds. The same precautions must be
adopted as normal for safe cornering and
driving on slippery roads must be
adopted.
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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235
Car care
Fuse panel in end of fasciaNo. Amp. Function
1 15 Steering wheel lock
2 5 Steering column unit; ignition switch
3 10 Hands-free 3
4 10 Main instrument unit;
automatic climate control
(ACC) 3
5 7.5 Control module in front doors; Park Brake Shift Lock
(automatic transmission)
6 7.5 Brake light switch
7 20 Dash fuse panel; fuel filler door
8 30 Control module in passenger front door
9 10 Dash fuse panel
10 30 Trailer socket
3; electrical socket in storage compart-
ment between seats 3
11 10 Data link connection (diagnostics)
12 15 Interior lighting incl. glove box
13 10 Accessories
14 20 Amplifier 2, Sound System 3
15 30 Control module in driver’s door
16 5 Passenger Sensing System
17 - -
18 - -
19 - -
20 7.5 Headlight levelling switch 3
21 7.5 Hands-free 3; brake light switch; clutch pedal switch
22 30 Cigarette lighter 3
23 40 Cabin fan
24 7.5 Airbag control module
25 - -
26 5
Yaw sensor (cars with ESP
®)
27 - -
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236 Car care
Trunk fuse panel, left-hand sideNo. Amp. Function1–5 MAXI -
6 30 Control module in left rear door
7 30 Control module in right rear door
820Trailer 3
9--
10 30 Left-hand brake light; rear right turn signal; right tail-
light; right reversing light; high-mounted brake light;
trailer lights
11 10 XWD
12 - -
13 - -
14 - -
15 15 Seat heating, left seat 3
16 15 Seat heating, right seat 3
17 7.5 Auto dimming rear view mirror 3; rain sensor 3
18 15 Moonroof 3
19 - -
20 7.5 XM-radio 3, TMC-tuner 3
21 7.5 Saab Parking Assistance (SPA)
3; control module in
rear doors; dome light (Convertible)
22 30 Radio 3; navigation 3
23 7,5 TPMS (automatic tire pressure monitoring system)
24 10 Movement sensor
3; tilt sensor 3; dome light (Con-
vertible)
25 30 Electrically adjustable driver’s seat with memory 3
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258 Car careDriving with a compact wheel
fittedObserve the following when the compact
spare tire is fitted:
 The compact spare is light and easy to handle when changing a tire.
 Do not drive further than necessary with the compact spare fitted - the maximum
life of the tire is only just over 2,000 miles
(approx. 3,500 km).
 Refit the standard tire as soon as possi- ble.
 Fitting a spare tire/wheel without pressure sensor will trigger a malfunction
message, see page 255.
Important considerations when driving with
a compact spare tire:
 The car’s ground clearance is reduced.  The car must not be driven with more than
one compact spare tire at a time.
 Avoid driving against the curb.
 Do not use snow chains.
 Do not fit the wheel cover - this would conceal the warning text.
Changing a tire
WARNING
 Do not exceed 50 mph (80 km/h). The
tire can overheat affecting the car’s
road holding.
 Tire pressure: refer to page 291.
 The spare tire or punctured tire must be stowed under the trunk floor, and
secured in place with the retaining nut.
WARNING
Lifting a vehicle and getting under it to do
maintenance or repairs is dangerous
without the appropriate safety equipment
and training. The jack provided with your
vehicle is designed only for changing a
flat tire. If it is used for anything else, you
or others could be badly injured or killed if
the vehicle slips off the jack. Use the jack
provided with your vehicle only for chang-
ing a flat tire.
Changing a tire can be dangerous. The
vehicle can slip off the jack and roll over
or fall on you or other people. You and
they could be badly injured or even killed.
Find a level place to change your tire. To
help prevent the vehicle from moving:
1 Set the parking brake firmly.
2 If you have an automatic transmis- sion, put the shift lever in PARK (P).
For a manual transmission, leave the
car in gear (1st or REVERSE (R)).
3 Turn off the engine and do not restart while the vehicle is raised.
4 Do not allow passengers to remain in the vehicle.
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267
Car care
Textile carpetingTextile carpeting should be vacuum
cleaned regularly. Carpeting can also be
cleaned using a brush or sponge and carpet
shampoo.
For safety reasons, vacuum cleaners that
are not earthed (grounded) must not be
used out of doors.Engine bayThe engine bay should be cleaned with an
engine decreasing and rinsed with hot
water. The headlights must be covered
over. Do not use a pressure washer. Avoid
spraying electrical components and con-
nectors.
Do not use petrol as a cleaning agent or sol-
vent when carrying out repairs or mainte-
nance. Saab recommends the use of envi-
ronmentally-friendly cleaning solutions.
WashingThe bodywork must be washed frequently.
When the car is new, the body should be
washed by hand using plain cold water and
a clean, soft brush through which the water
flows. Automatic carwashes should be
avoided when the car is new.
After 5–6 months the paintwork will have
hardened. To facilitate cleaning, a suitable
detergent can be added to the water, which
should be lukewarm.
Remove any bird droppings without delay,
as these can discolor the paintwork and
prove difficult to polish out. Lay a wad of wet
paper on the patch of dirt and leave it for a
minute or so. It will then be easy to wash off
the dirt.
Use a soft cloth moistened with white spirit
to remove splashes of tar or asphalt. Do not
use strong cleaners, as these can dry out
the paintwork.
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.
The door mirrors should be folded in
before the car enters an automatic car
wash.
SportCombi: To avoid the wiper arm to
break tape it down to the window when
using a drive-through car wash.
Try your brakes on leaving a car wash.
Wet brake discs reduce the performance
of the brakes.
Fixed antennae, such as for a mobile
phone, must be removed if the car goes
through an automatic car wash.
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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294 Technical dataWarning and indications that can
be shown on the SIDWhich warnings and indications that can be
shown depends on engine variant and car
specification.
The warnings/indications that contain an
exclamation mark are shown together with
a warning or check light in the main instru-
ment panel.
Symbol Text
Antilock brake malfunc.
Contact service.
Brake malfunction.
Make a safe stop.
Brake fluid level low.
Make a safe stop.
Release park brake.
Oil pressure low.
Make a safe stop.
Low engine oil level.
Fill oil now.
Reduced engine power.
Contact service.
Tighten fuel filler cap.
Limited performance.
Coolant level low.
Refill.
Hot engine. Make a
safe stop. Idle engine.
Airbag malfunction.
Contact service.
Gearbox too hot. Make a
safe stop. Open hood.
Battery not charging.
Make a safe stop.
Headlight levelling
malfunction.
Cornering headlights
malfunction
Tap brakes lightly
before using cruise ctrl.
Traction control failure.
Contact service.
Stability control failure.
Contact service.
Turn on the lights.
Washer fluid level low.
Refill.
Rain sensor malfunc.
Contact service.
Key not accepted.
Contact service.
Remote control battery
low. Replace battery.
Number of keys:
Active key number:
Steering lock malfunc.
Make a safe stop.
Pull out key, turn
steering wheel. Restart.
Theft protection failure.
Contact service.
Alarm tripped during
last arming period.
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295 Technical data
Rear left seat
backrest unlocked.
Rear right seat
backrest unlocked.
Parking assistance
malfunction. Service.
Parking assistance
sensor interference.
Close doors.
Left brake light failure
Left high beam failure.
Left low beam failure.
Rear fog light failure.
Right brake light failure.
Right high beam failure.
Right low beam failure.
High mounted stop
light failure.
Left front turn signal
failure.
Left rear turn signal
failure.
Right front turn signal
failure.
Right rear turn signal
failure.
Right side-mounted
turn signal failure.
Left side-mounted
turn signal failure.
Left front position
light failure.
Right front position
light failure.
Left front fog light
failure.
Right front fog light
failure.
Left reversing light
failure.
Right reversing light
failure.
License plate light
failure.
Left rear taillight
failure.
Right rear taillight
failure.
Right side day-time
running light failure.
Left side day-time
running light failure.
Tire pressure low,
rear left. Check tires.
Tire pressure low,
rear right. Check tires.
Tire pressure low,
front right. Check tires.
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