BMW 325I 2001 Manual Online

81n
IndexDataTechnologyRepairsCar careControlsOverview
DSC
* Ð BMW 325i
The concept DSC helps maintain 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, the system recog-
nizes unstable vehicle conditions
(understeering or oversteering, for
example) and helps hold the vehicle on
a sure course by intervening via the
engine and by braking intervention at
the individual wheels.
The DSC is operational every time you
start the engine. DSC contains the
functions of ADB and CBC, refer to
page 117.
The ADB (Automatic Differential
Braking) copies the function of conven-
tional differential and transverse lock
through brake intervention, and
increases traction whenever conditions
merit, e. g. when driving on snow-
covered roads.
If the DSC is switched off the ADB will
still be in ready mode.
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly
after you switch on the ignition.
Refer to pages 21 and 22.
Indicator lamp flashes:
DSC is active and governs the drive
force and braking force.
The indicator lamp lights up continu-
ously:
The DSC has been turned off via the
switch; ADB is ready to use.
ADB intervention is not indicated.
The indicator lamp and the
brake warning lamp lights up
continuously:
The DSC, ADB and DBC have
been switched off via the button
or are defective.
Indicator and warning lamps for
Canadian models.
You can continue to drive the vehicle
normally, but without DSC. Please
consult your BMW center in the event
of a malfunction, refer to pages 21
and 22.
Deactivate DSC/activate ADBPress the DSC button briefly, the indi-
cator lamp lights up continuously.
The DSC has been switched off; ADB is
operational.
In the following exceptional circum-
stances, it may be effective to deacti-
vate the ADB for a short period:
>When rocking the vehicle or starting
off in deep snow or on loose
surfaces.
>When driving on snow-covered
grades, in deep snow, or on a snow-
covered surface that has been
packed down from being driven on.
>When driving with snow chains.
Refer also to page 121.
The gain in traction is achieved by a
reduction in stabilizing intervention.460de313

82n
DSC
* Ð BMW 325i
Deactivate DSC and ADBHold the DSC switch down for at least
3 seconds. The indicator and the yellow
brake warning lamps will remain on the
entire time.
In this case, no interventions to
increase stability and traction for engine
and brakes are carried out.
To maintain vehicle stability,
always drive with the DSC on
whenever possible.<
Reactivate DSC and ADBPress the button again; the indicator
lamp or the indicator lamps will go out.
The laws of physics cannot be
repealed, even with DSC. It will
always be the driver's responsibility to
drive in a manner that matches road
conditions. We therefore urge you to
avoid using the additional safety margin
of the system as an excuse for taking
risks.
Whenever the ADB is activated, the
DSC is switched off and will not
perform any stabilizing intervention.
Do not make any modifications to the
DSC system. Allow only authorized
technicians to perform service proce-
dures on the DSC.<
For additional information concerning
DSC, please refer to the chapter
"Advanced technology" on page 173.

83n
IndexDataTechnologyRepairsCar careControlsOverview
DSC Ð BMW 325xiThe conceptDSC maintains vehicle stability, even in
critical driving situations.
The system enhances vehicle stability
during acceleration and when starting
up from a full stop, and optimizes trac-
tion as well. In addition, it recognizes
unstable vehicle conditions, such as
understeering or oversteering, and, as
far as is possible within the laws of
physics, helps keep the vehicle on a
steady course by reducing the engine
output and brake applications to the
individual wheels.
The DSC is operational every time you
start the engine. DSC contains ADB-X
und DBC, refer to page 118.
The ADB-X (Automatic Differential
Braking) replaces the function of
conventional differential and transverse
lock through brake intervention, and
increases traction whenever conditions
merit, e. g. when driving on snow-
covered streets.Indicator lamp
The indicator lamp on the instru-
ment cluster will go out shortly
after the ignition has been
started. Refer to pages 21, 22.
If the indicator lamp flashes:
DSC controls the drive and braking
forces.
The indicator lamp stays lit:
DSC is switched off via the switch;
ADB-X is operational.
ADB-X intervention not indicated.
If the indicator lamp does not go
out after repeatedly pressing the
DSC switch, then the DSC and the
ADB-X are defective, and the interven-
tion described to the right is then no
longer available.<
The vehicle will remain completely
operational, however, without DSC. In
the event of a fault, please see your
BMW center. Refer to pages 21, 22.
Deactivate the DSCPress the DSC button; the indicator
lamp comes on and stays on.
The DSC has been switched off and the
ADB-X is designed for maximum
output.
In the following exceptional circum-
stances, it may be effective to deacti-
vate the DSC for a short period:
>When rocking the vehicle or starting
off in deep snow or on loose
surfaces.
>When driving with snow chains. Refer
also to page 121.
To maintain vehicle stability,
always drive with the DSC on
whenever possible.<460de313

84n
DSC Ð BMW 325xiReactivate the DSCPress the button again; the indicator
lamp goes out.
The laws of physics cannot be
repealed, even with DSC. It will
always be the driver's responsibility to
drive in a manner that matches road
conditions. We therefore urge you to
avoid using the additional safety margin
of the system as an excuse for taking
risks.
Whenever the DSC has been switched
off, it will not perform any stabilizing
intervention.
Do not make any changes to the DSC.
Allow only authorized technicians to
perform service procedures on the
DSC.<
For additional information concerning
DSC, please refer to "Advanced tech-
nology" on page 171.

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IndexDataTechnologyRepairsCar careControlsOverview
Tire Pressure Control (RDC)
*
The conceptThe RDC monitors the tire pressures at
all four wheels, even when the vehicle
is moving. The system provides an alert
whenever the inflation pressure drops
significantly below the specified pres-
sure in one or more tires.
In order for the RDC system to "learn"
the correct tire inflation pressure, first
check the tire inflation pressure in all
tires. Then compare these pressures
with the tire inflation pressure chart
(page 29) and adjust if necessary. Then
activate the system.
This indicator lamp in the instru-
ment cluster informs you when-
ever the tire pressure is not
normal.
Activate the system Depending on the type of equipment,
the switch either has the letters RDC on
it or the RDC-symbol.
1 Turn the ignition key to position 2
(do not start the engine).
2 Press the switch long enough for the
indicator lamp in the instrument
cluster to light up yellow for a few
seconds.
3 After a few minutes driving time, the
RDC sets the current inflation pres-
sure in the tires as the target values
to be monitored.
You will only have to repeat this proce-
dure following a correction of the tire
inflation pressure. Otherwise, the RDC
functions automatically when the igni-
tion key is in position 2, and thus oper-
ates whenever the vehicle is driven.460us297
Loss of tire pressureIf the inflation pressure has dropped
significantly over a long period of time
(which is normal for any tire), the indi-
cator lamp will come on with a yellow
lamp.
This alerts you that you should have the
tires inflated to the specified pressures
as soon as possible.
If you are prompted to check the
tire pressure shortly after a
correction has been made, this indi-
cates that the corrected values were
not accurate. Please check the inflation
pressure again and make corrections
according to the inflation pressure
table. Then activate the system once
again.<

86n
Tire Pressure Control (RDC)
*
Flat tireIf there is a tire failure with loss of pres-
sure, the indicator lamp comes on with
a red lamp. In addition, an acoustic
signal goes off.
If this occurs, reduce vehicle speed
immediately and stop the vehicle in a
safe location. Avoid hard brake applica-
tions. Do not oversteer. Replace the
wheel and flat tire.
The space-saver spare tire is
provided for temporary use only
in the event of a tire failure. It does not
have RDC electronics and is not moni-
tored. A full-size spare tire
that has the
same dimensions as the tires already
mounted on the vehicle is equipped
with the necessary RDC electronics,
and will also be monitored once the
tires have been mounted and the
system activated.<
The RDC cannot alert you to
severe and sudden tire damage
caused by external factors.<
Have the tires changed by your
BMW center.
Your BMW center has been trained to
work with the RDC system and is
equipped with the necessary special
tools.<
System interferenceThe RDC may encounter interference
from outside equipment or devices
which use the same radio frequency.
The indicator lamp will come on with
a yellow lamp during the malfunction.
The indicator lamp also comes on
>in the event of a system fault
>if a wheel is mounted without the
RDC electronics
>if, in addition to the spare tire, addi-
tional wheels with RDC electronics
are on board.
Please contact your BMW center for
additional information.

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IndexDataTechnologyRepairsCar careControlsOverview
Side lamps
With the switch in this position,
the front, rear and side vehicle
lighting comes on. As an addi-
tional feature, you can illuminate your
vehicle on either side for parking, refer
to page 88.
Low beam headlamps
When you switch the ignition off
with the low beam headlamps
on, only the parking lamps will
remain on.
460us035
"Follow-Me-Home" lamps:
If you actuate the headlamp
flasher after you have turned the vehicle
off, the low beams will come on for a
brief period. You may also have this
function deactivated if you wish.<
"LAMPS ON" warningWhen you open the driver's door after
turning the ignition key to position 0, an
acoustic signal will go off for a few
seconds to remind you when the head-
lamps have not been switched off
.
Daytime running lamps
*
If you desire, the lamp switch can be
left in the second position:
When the ignition is switched off, the
external lighting is also switched off.
Turn the rotary dial to adjust the illumi-
nation intensity.460us036
Side lamps/Low beams Instrument lighting

88n

High beams/Parking lamps

Fog lamp Interior lamps

1 High beams
(blue indicator lamp)
2 Headlamp flasher
(blue indicator lamp)
3 Parking lamp

Parking lamps, left or right

As an additional feature, you can illumi-
nate your vehicle on either side for
parking, if you wish to do so:
With the ignition key in position 0,
engage the lever in the appropriate
turn-signal position.460de085

Fog lamps

A green indicator lamp comes
on in the instrument cluster to
indicate that the front fog lamps
are on.
460us038

The illustration provides an example of
the interior lamps when equipped with
reading lamps.
The interior lamps operate
automatically.

To switch the interior lamps on
and off manually

Press the button briefly.
If you want the interior lamps to remain
off all the time, press and hold the
button for approx. 3 seconds.
To revert to normal operation, press the
button briefly.

Footwell lamps

*
The footwell lamps operate in the same
way as the interior lamps.460de039

89n
IndexDataTechnologyRepairsCar careControlsOverview
Interior lampsReading lamps, frontThe reading lamps can be switched on
and off with the switch adjacent to each
lamp.Reading lamps, rearThe reading lamps can be switched on
and off with the switch adjacent ot each
lamp.463de009
In order to prevent draining the
battery, all of the lamps in the
vehicle are switched off automatically
approx. 15 minutes after the ignition
key is turned to position 0.<

90n
460us299Air conditioner