2001 BMW 540I SEDAN warning lights

22n
Indicator and warning lampsTechnology that monitors itselfMany of the systems of your BMW
monitor themselves automatically, both
during engine starts and while you are
driving. Indicator and warning lamps
that are identified by "l" are tested for
proper functioning whenever the igni-
tion key is turned. They each light up
once for different periods of time.
If a fault should occur in one of these
systems, the corresponding lamp does
not go out after the engine is started or
it lights up while the vehicle is moving.
You will see how to react to this below.
Red: stop immediately
Battery charge current l
The battery is no longer being
charged. There is a malfunction
of the alternator V-belt or in the charg-
ing circuit of the alternator. Please con-
tact the nearest BMW center.
If the ribbed V-belt is defective, do
not continue driving. The engine
could be damaged due to overheating.
If the ribbed V-belt is defective, in-
creased steering effort is also re-
quired.<
Engine oil pressure l
Comes on while the engine is
running and the "STOP!ENGINE
OILPRESS" message appears in the
Check Control: stop vehicle immedi-
ately and switch off engine. Check level
of oil in engine, top up as required. If oil
level is correct: please contact the
nearest BMW center.
Do not continue driving. The en-
gine could be damaged because
of inadequate lubrication.<
Tire Pressure Control (RDC)
* l
In addition, there is an acousti-
cal warning signal: a tire failure
has occurred. Reduce vehicle speed
immediately and stop the vehicle. Avoid
hard brake applications. Do not over-
steer. For additional information: refer
to page 103.
Parking brake
*,
brake hydraulic system l
Comes on when you engage the
parking brake. For additional informa-
tion: refer to page 70.
Comes on although the parking brake is
released: have the brake fluid level
checked. Before driving further, be
sure to read the notes on pages 146
and 168.
Also comes on with the message
"CHECK BRAKE PADS" in the Check
Control.
Parking brake* warning lamp/
Brake hydraulic system for
Canadian models.

24n
Indicator and warning lamps
Automatic Stability Control plus
Traction (ASC+T)/Dynamic Sta-
bility Control (DSC)
* l
The ASC+T/DSC has been switched off
or has been deactivated because of a
malfunction. In the event of a malfunc-
tion, have the system checked by your
BMW center.
For additional information: refer to
page 102.
Engine electronics
*
There is a fault in the engine's
electronic control system. The
electronics allow for continued driving
with reduced engine output or rpms.
Please have the system inspected by
your BMW center.
Service Engine Soon l
If the indicator lamp comes on
either continuously or intermit-
tently, this indicates a fault in the emis-
sions-related electronic systems.
Although the vehicle remains opera-
tional, you should have the systems
checked by your BMW center at the
earliest possible opportunity.
For additional information: refer to
page 178.
Service Engine Soon warning
lamp for Canadian models.
Green: for your information
Turn signal
Flashes when the turn signals
are in operation. Rapid flashing
indicates a system malfunction.
For additional information: refer to
page 78.
Cruise control
Lights up when the cruise con-
trol is activated. Available for
operation via the multifunction steering
wheel.
For additional information: refer to
page 81.
Fog lamps
Lights up whenever you switch
on the fog lamps.
For additional information: refer to
page 106.
Blue: for your information
High beams
Lights up when the high beams
are on or the headlamp flasher
is actuated.
For additional information: refer to
pages 78 and 106.

IndexDataTechnologyRepairsCar careControlsOverview
85n
Coolant temperature gauge Service Interval DisplayBlueThe engine is still cold. Drive at moder-
ate engine and vehicle speeds.RedWhen you switch on the ignition, the
warning lamp
* comes on briefly to con-
firm that the system is operational.
If the the warning lamp lights up while
driving, or the message "Coolant tem-
perature" shows up in the Check Con-
trol
*, then the engine has overheated.
Switch the engine off immediately and
allow it to cool down.390de007
Between the blue and red zonesNormal operating range. It is not un-
usual for the needle to rise as far as the
edge of the red zone in response to
high outside temperatures or severe
operating conditions.
Checking coolant level: refer to
page 167.
The precise layout varies according to
the individual model version.
Green lampsThe number of illuminated lamps de-
creases as the time for your next main-
tenance visit approaches.Yellow lampThis field appears together with
OILSERVICE or INSPECTION.
Maintenance is due. Please contact
your BMW center for an appointment.Red lampThe maintenance deadline has been
passed.390us702

86n
Check ControlGraphic display
*
The following alerts or status messages
are displayed symbolically from ignition
key position 2 and up until the defects
are corrected:
1 Check headlamps
2 Add washer fluid
(goes out after approx. 1 minute)
3 Door open
4 Luggage compartment lid/tailgate
open
5 Check brake and tail lamps.
A defective center tail lamp is indica-
ted by the upper symbol
When you open the door after stopping,
a warning signal sounds without a vi-
sual indicator for:
>LIGHTS ON and
>KEY IN IGNITION LOCK.390de121
Alphanumeric display
*
Text messages are used to alert the
driver to system malfunctions when the
ignition key is turned to position 2. The
alert is accompanied by a gong.
1 Status report symbol
2 Display
3 CHECK button
Messages concerning system faults are
differentiated based on two priorities:390us111
Priority 1
These defects are immediately indi-
cated by a gong and a flashing warning
symbol 1. Simultaneous defects will be
displayed consecutively. These status
reports remain in the display until the
defects are corrected. It is not possible
to delete them by pressing the CHECK
button 3:

IndexDataTechnologyRepairsCar careControlsOverview
87n
Check Control>RELEASE PARKINGBRAKE
>COOLANT TEMPERATURE
The coolant is overheated. Stop the
vehicle immediately and switch off
the engine. Refer to pages 85
and 16 7.
>STOP!ENGINE OILPRESS
The oil pressure is too low. Stop the
vehicle immediately and switch off
the engine. Refer to page 22.
>CHECK BRAKE FLUID
Indicates that brake fluid is down to
roughly minimum level. Top up the
brake fluid at the next opportunity.
Refer to page 168. Have the source
of the brake fluid loss diagnosed and
corrected by your BMW center.
>TIRE DEFECT
*
Reduce vehicle speed immediately
and stop the vehicle. Avoid hard
brake applications. Do not oversteer.
Refer to page 104.
>SELFLEVEL SUSP.INACT
Please consult the nearest authorized
BMW center. Refer to page 148.
>SPEED LIMIT
*
Display if the programmed speed
limit has been exceeded.Priority 2
These displays appear for 20 seconds
when the ignition key is turned to posi-
tion 2. The warning symbols remain
after the message disappears. You can
display the messages again by pressing
the CHECK button 3:
>TRUNKLID OPEN
Message appears only when the
vehicle is initially set in motion.
>DOOR OPEN
This message appears after a mini-
mal defined road speed has been ex-
ceeded.
>FASTEN SEAT BELTS
*
In addition to this message, a
warning lamp with the safety belt icon
appears and an acoustical signal
sounds.
>WASHER FLUID LOW
Too low; top up fluid at the next
opportunity. Refer to page 164.
>CHECK ENGINE OIL LEV
The oil level is at the absolute mini-
mum, and therefore engine oil should
be added as soon as possible. Refer
to page 165. Until then, do not drive
more than approx. 30 miles (50 km)>CHECK FILLER CAP
Check that the filler cap is closed
correctly, refer to page 28. A loose or
missing cap will activate the message
"CHECK FILLER CAP" in the Check
Control
* or the Service Engine Soon
lamp.
>OUTSIDE TEMP. +207 (–56)
This display is only an example. The
current temperature is displayed at
outside temperatures of +37.57
(+36) and below. Refer also to
page 83.
>SET TIRE PRESSURE
*
The RDC has imported the current in-
flation pressure in the tires as the tar-
get values which the system will
monitor. Refer to page 103.
>CHECK TIRE PRESSURE
*
Check and correct the tire inflation
pressure to specifications at the earli-
est opportunity (next stop for fuel).
Refer to page 104.
>TIRECONTROL INACTIVE
*
A temporary interference of the RDC
or a system fault. Refer to page 104.
>CHECK BRAKE LIGHTS
A lamp has failed or the electrical cir-
cuit has a fault. Refer to pages 186
and 196 or consult a BMW center.

IndexDataTechnologyRepairsCar careControlsOverview
105n
Parking lamps
(side marker lamps)
With the switch in this position,
vehicle lighting is illuminated on
both sides. For lighting on one
side for parking as an additional fea-
ture, refer to page 106.
Low beams/Xenon lamps
*
When the ignition is switched off
and the low beams are on, only
the parking lamps (side marker
lamps) remain on.
390de034
"Follow-me-home lighting:"
If you actuate the headlamp
flasher after you have parked the
vehicle and shut off the engine, the low
beams will remain on for a brief period.
You may also have this function deacti-
vated if you wish.<
Xenon lamps
*
For additional details, refer to
page 184."LIGHTS ON" warning In ignition key position 0, a buzzer
sounds for a few seconds after the
driver's door is opened if the head-
lamps have not been switched off
.
On vehicles with alphanumeric
Check Control
*:
The reminder is given through the
Check Control.
Daytime-driving lamp
*
The headlamps are automatically
switched on for daylight driving at
ignition key position 2.
Turn the rotary dial to adjust the illumi-
nation intensity.390de036
Parking lamps/Low beamsInstrument lighting

Everything from A to Z

231n

IndexDataTechnologyRepairsCar careControlsOverview

Height219
Height adjustment
seats52
steering wheel56
Help with jump
starting200

t

HiFi system211
High beams24
bulb replacement183

t

High Performance Synthetic
Oils166
High-mount brake lamp187
Hood release159

t

Horn25
Hydraulic Brake Assistant,
refer to DBC23, 100, 145

I
Ice warning83
Identification number of the
vehicle169
Identification, tires153
Ignition key36
Ignition lock68
Imprint4
Independent
ventilation94, 120
Independent ventilation,
refer also to the onboard
monitor Owner's Manual
Indicator lamps22

t

Inflation
pressure29

t

, 30, 150
monitoring103, 213
INSPECTION85
Instrument cluster18, 20
Instrument lighting105
Instrument panel20
Instrument panel switch78
Instruments18
Integrated rear
suspension214
Intensive
cleaning78, 79, 164
Interaxle tire rotation152
Interference indicators86
Interference with
car phones149
Interior lamps106
bulb replacement188

t

remote control40
Interior mirror57
with automatic dimming
feature211
Interior motion sensor48
deactivation48
Interior rearview mirror
with automatic dimming
feature57
Interlock68
Intermittent mode78

J
Jack190

t

Jump starting200

t
KKey Memory60
Key, transmitter36
Keys36
Keys with remote control36
Kickdown73, 76LLashing eye136
Leather care175
Length219
Level control
system23, 214
inactive148t
License plate lamps, bulb
replacement188t
Light switch105
Light-alloy wheels156
Lighter126
Lights-on warning105
LIMIT95
Load-securing devices136
Locking and unlocking the
doors38
Louvers108, 114
Low beams105
bulb replacement183tLow-fuel warning lamp84
Lug bolts191
Lug wrench191t
Luggage compartment46
capacity221
hanger46
lamps106
Luggage compartment
lamps, bulb
replacement189t
Luggage compartment lid/
tailgate43
emergency actuation43
opening separately43
remote control41
secure separately43
unlock in case of electrical
fault43t
Luggage space46
Luggage straps46
Lumbar support54
MM+S tires154
Magic Eye194
Maintenance85t, 170t
Malfunction displays86t