2001 BMW X5 4.4I sensor

IndexDataTechnologyRepairsCar careControlsOverview
93n
The conceptThe PDC assists you when you are
parking. Acoustical signals inform you
of the distance to an obstacle. To do
this, four ultrasonic sensors in the front
and rear bumpers measure the distance
to the nearest object. The monitoring
range for the front sensors as well as
the two rear corner sensors ends
approx. 2 ft (60 cm) behind the
respective bumper. The center sensors
in the rear have a range of approx. 5 ft
(1.50 meters). Automatic functionThe system starts to operate auto-
matically about one second after you
select reverse with the ignition key in
position 2.
Manual activationPress the button (arrow); the indicator
lamp comes on.
After driving a distance of more than
approx. 160 ft (50 meters) or exceeding
a speed of approx. 20 mph (30 km/h),
the system switches off and the indi-
cator lamp goes out. Switch the system
on again as required. Manual deactivationPress the button again. 530us060
Acoustical signalsThe distance from an obstacle is indi-
cated in front with a higher intermittent
tone, at at the rear with a lower intermit-
tent tone. As the distance between
vehicle and object decreases, the inter-
vals between the tones become
shorter.
A continuous tone indicates the pres-
ence of an object less than approx. 1 ft
(30 cm) away.
The warning signal is canceled after
approx. three seconds if you are
moving parallel to a wall.
If there is a malfunction of the system:
The indicator lamp flashes and a short
steady signal tone is sounded
>if you activate PDC with the button.
>when you select reverse for the first
time after switching on the ignition.
>if a malfunction occurs while the PDC
system is active.
Switch the system off and have the
cause of the malfunction corrected by
your BMW center.
Park Distance Control (PDC)
*

94n
PDC
*
Dynamic Stability Control (DSC)
The PDC system does not remove
the driver's personal responsibility
for evaluating the distance between the
vehicle and any obstacles. Even when
sensors are involved, there is a blind
spot in which objects cannot be
detected. This applies especially in
those cases where the system
approaches the physical constraints of
ultrasonic measurement, as occurs with
tow bars and trailer couplings, and in
the vicinity of thin and painted objects.
Certain sources of sound, such as a
loud radio, could drown out the PDC
signal tone.<
Keep the sensors clean and free
of ice or snow in order to ensure
that they continue to operate effectively.
Do not apply high pressure spray to the
sensors for a prolonged period of time.
Maintain an adequate distance of more
than 4 in (10 cm).<
The concept DSC maintains vehicle stability, even in
critical driving situations.
The system optimizes vehicle stability
during acceleration and when starting
from a full stop, as well as optimizing
traction. In addition, it recognizes
unstable vehicle conditions, such as
understeering or oversteering, and, as
far as is possible within the laws of
physics, keeps the car on a steady
course by adapting the RPMs and
brake applications to the individual
wheels.
The system starts up automatically
each time you start the engine.
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly
after you switch on the ignition.
Refer to page 24.
Indicator lamp flashes:
The system is active and governs drive
and braking force.
If the indicator lamp fails to go out after
the engine is started, or comes on
during normal driving and stays on:
The system is either defective or was
switched off with the button: the stabi-
lizing applications described to the left
are no longer available. The vehicle will
remain completely operational,
however, without DSC.
Consult your BMW center to have the
system repaired.

IndexDataTechnologyRepairsCar careControlsOverview
107n
Automatic climate control
*
1 Airflow directed toward the wind-
shield and side windows
2 Airflow for the upper body
The side rotary dials provide infi-
nitely-variable regulation of the air
supply, while the levers change the
airflow direction. The center rotary
dial controls the temperature of the
air as it flows out. Refer to page 111
3 Front footwell ventilation
4 Rear footwell ventilation
5 Air flow for the upper body in the
rear seat110
6 Automatic air distribution108
7 Individual air distribution108
8 Temperature control –
left-hand side108
9 Display for temperature and air
supply10910 Temperature control –
right-hand side108
11 To defrost windshield and side
windows109
12 Air conditioner109
13 Automatic recirculated air control
(AUC)110
14 Rear window defroster73, 110
15 Air supply109
16 Maximum cooling109
or using up residual heat110
17 Air grille for interior temperature
sensor – please keep clear and
unobstructed

136n
General driving notes Catalytic converter
Brakes:
Do not drive with your foot resting
on the brake pedal. Even light but
consistent pedal pressure can lead to
high temperatures, brake wear and
possibly even brake failure.
Aquaplaning:
When driving on wet or slushy roads,
reduce vehicle speed. If you do not, a
wedge of water may form between the
tires and the road surface. This
phenomenon is referred to as aqua-
planing or hydroplaning. It is character-
ized by a partial or complete loss of
contact between the tires and the road
surface. The ultimate results are loss of
steering and braking control.
Cargo area cover:
Do not place heavy or hard objects on
the cargo area cover. These objects
could endanger vehicle occupants
during heavy brake applications or
evasive maneuvers.
Clothes hooks:
When suspending articles of clothing
from the hooks, be sure that they will
not obstruct the driver's vision. Do not
hang heavy objects on the hooks. If you
do so, they could cause personal injury
during braking or evasive maneuvers.< The catalytic converter reduces harmful
exhaust emissions.
It is designed for use with unleaded fuel
only. Even minute quantities of lead
would be enough to permanently
damage both the catalytic converter
and the system oxygen sensor.
To ensure efficient, trouble-free engine
operation and avoid potential damage:
>Be sure to comply with the scheduled
maintenance requirements.
>Fill the fuel tank well before it is
empty.
>Tow-start the vehicle only when the
engine is cold, since unburned fuel
may otherwise reach the catalytic
converter. It is better to start the
vehicle with an outside starting aid.
>Avoid other situations in which the
fuel is not burned, or burns incom-
pletely, such as engaging the starter
frequently or for extended periods, or
repeated start attempts in which the
engine does not start (stopping and
restarting an engine which is running
properly does not present a problem).
Never allow the engine to run with
any of the spark plug cables discon-
nected.

IndexDataTechnologyRepairsCar careControlsOverview
163n
Caring for your vehicleWashing your vehicle You can have your new BMW washed
in an automatic car wash. Car wash
systems that do not employ brushes
are preferable.
Wipe away tough dirt and loosen and
remove dead insects before washing
the vehicle.
To prevent spots, avoid washing when
the hood is still warm, or immediately
after and during exposure to strong
sunlight.
When using an automatic car wash, be
sure that:
>The car wash system is suited for the
dimensions of your vehicle.
Before washing the vehicle in a
car wash, fold in the exterior
mirrors manually, otherwise they may
be damaged on account of the width of
the vehicle.<
>No damage will occur on vehicles
with attached body accessories (such
as spoilers or antennas). If you are
uncertain, consult the manager of the
car wash.
>The wheels and tires of your vehicle
cannot be damaged by the convey-
ance devices of the car wash system.
>The vehicle is cleaned with minimum
brush pressure, and that ample water
is available for washing and rinsing.
Vehicles with rain sensor
*:
Clean the windshield regularly. Wax
from automatic car washes or insects,
for example, can cause malfunctions in
the function of the rain sensor.
Deactivate the rain sensor in auto-
matic car washes. If you do not,
damage may occur if the wipers switch
on unintentionally.<
Parts of the vehicle that are inacces-
sible to the automatic car wash — such
as door sills, door and hood edges, etc.
— should be cleaned by hand.
In the winter months, it is especially
important to ensure that the vehicle is
washed on a regular basis. Large quan-
tities of dirt and road salt are difficult to
remove, and they also cause damage to
the vehicle.
If spray wands or high-pressure
washers are used, be sure to
maintain an adequate distance between
the spray source and the vehicle's
surface. Inadequate distance and
excessive pressure can damage or
weaken the finish, making it more
susceptible to subsequent attack. In
addition, moisture could penetrate to
vehicle components, leading to long-
term damage.<
When cleaning the headlamps,
please observe the following:
>Do not wipe dry (scratches). Never
use abrasives or strong solvents to
clean the covers.
>Remove dirt and contamination (such
as insects) by soaking with BMW Car
Shampoo and then rinsing with plenty
of water.
>Always use a deicer spray to remove
accumulated ice and snow – never
use a scraper.<
After washing the vehicle, apply
the brakes briefly to dry them.
Braking efficiency might otherwise be
reduced by the moisture and the brake
rotors could also be corroded.<

IndexDataTechnologyRepairsCar careControlsOverview
Overview
Controls and features
Operation, care
and maintenance
Owner service procedures
Technical data
Index Advanced technology
195n
Airbags196
Adaptive Transmission Control
(ATC)196
Four-wheel drive197
Dynamic Stability Control
(DSC)197
Radio reception198
Safety belt tensioner198
DSP sound system199
Rearview mirrors with automatic
dimmer199
Rain sensor200
Front axle200
Integrated rear suspension201
Level control system201
Xenon lamps202
Technology

196n
Deceleration sensors continuously
monitor the physical forces acting upon
the vehicle. If, as the result of a frontal
impact, vehicle deceleration is reached
at which the protection of the safety
belts alone is no longer adequate, the
gas generators of the driver-side and
passenger-side airbags are ignited
simultaneously. However, the
passenger-side airbag is only triggered
if an additional sensor has recognized
that the passenger seat is occupied.
Depending on which side the of vehicle
is involved in a side collision, the head
protection and side airbags in the front
and rear
* on that side are triggered if
necessary.
390de319
The airbags located under the marked
covers inflate and unfold in a matter of
a few milliseconds. In this process, they
tear through the designed separation
points of the upholstered covers or
press them out.
Because the inflation process must be
virtually instantaneous, it is necessarily
accompanied by a certain amount of
ignition and inflation noise. The gas
required to inflate the airbags is not
dangerous, and the associated smoke
then dissipates.
The entire process is completed within
fractions of a second. On vehicles with an automatic trans-
mission, Adaptive Transmission Control
(ATC) uses a number of factors to
calculate the gear which provides the
maximum efficiency. In this process,
the system monitors your personal
driving style, the driving situation, the
condition of the road, and the traffic
conditions.
ATC recognizes your personal driving
style from the positions and movements
of the accelerator pedal, deceleration
when braking, and lateral acceleration
through curves. Four different shift
characteristics – from comfort-oriented
to performance-oriented – are available
for selection by ATC.
530us130
Airbags ATC
*

IndexDataTechnologyRepairsCar careControlsOverview
197n
The transmission of power to the four
drive wheels is provided permanently
through a transfer box. The distribution
of torque between the front and rear
axles is 38% to 62%.
Traditional differential locks at the front
and rear axles and in the transfer box
are not required. Their function is taken
over by automatic braking intervention
at all four wheels. These traction inter-
ventions are governed by Automatic
Differential Brake (ADB-X), a sub-func-
tion of DSC.
If a wheel tends to slip, it is braked
automatically by ADB-X until it once
again gains traction, and drive force
can be transmitted to that wheel. In
addition, the drive force is distributed
to the remaining wheels during this
530us133
system intervention. Engine output is
also reduced if necessary.
When the DSC is deactivated, the
ADB-X traction intervention is set for
the maximum drive force. However,
the engine intervention and the stability
controls are no longer available. For
this reason, DSC should only be deacti-
vated in the exceptional circumstances
described on page 95.
The BMW X5 is a vehicle for all types of
roads. The permanent four-wheel drive
provides a significant degree of vehicle
stability and tractive power under all
road conditions. It assists in critical
situations such as driving in extreme
winter conditions or on bad roads. Precision sensors monitor the wheel
speeds, the steering angle, lateral
acceleration, brake pressure and the
movement of the vehicle around its
vertical axis.
If differences in wheel speeds occur, the
system recognizes the danger of wheel-
spin and reduces the engine's drive
torque. If necessary, the system also
responds with additional braking inter-
vention at all four wheels.
In addition, DSC permanently monitors
the vehicle's current operating condition
and compares it with an ideal condition
that is calculated from the sensor
signals. If deviations from this occur
(understeering or oversteering, for
instance), DSC can stabilize the vehicle
in fractions of a second by adapting
engine output and with the assistance of
braking intervention at individual
wheels. This way, as long as the skid
can still be managed under the laws of
physics, these kinds of dangerous skids
are prevented even before they can
start.
You may need some time to become
accustomed to this system intervention.
However, it provides optimum drive
force and vehicle stability. The braking
intervention may be accompanied by
certain sounds specific to the system.
Four-wheel drive DSC