2002 BMW 540I SEDAN check engine light

19n

OverviewControlsMaintenanceRepairsDataIndex

Indicator and warning lamps

Technology that monitors itself

The system runs a check on the
warning and indicator lamps marked by
"

l

" each time you switch on the igni-
tion. 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.
The following section describes how
you should respond.

Red: stop immediately

Battery charge current

l

The battery is no longer being
charged. This indicates a defect
in the alternator drive belt or in the
charging circuit of the alternator. Please
contact the nearest BMW center.
Stop and switch off the engine
immediately to prevent over-
heating and serious engine damage. If
the drive belt is defective, increased
steering effort is also required.

<


Engine oil pressure

l

May be accompanied by the
message "STOP!ENGINE
OILPRESS" in the Check Control
display panel

*
: stop the vehicle imme-
diately and switch off the engine. Check
the engine oil level; top up as required.
If the oil level is correct: please contact
the nearest BMW center.
Do not continue driving, as the
engine could sustain serious
damage from inadequate lubrication.

<



Tire Pressure Monitor (RDC)

*


l

Accompanied by an acoustic
warning signal: a tire failure has
occurred. Reduce vehicle speed imme-
diately and stop the vehicle. Avoid hard
brake applications. Do not oversteer.
For additional information: refer to
page 98
Parking brake

*
/
brake system hydraulic circuits

l

Comes on when you engage the
parking brake.
For additional information: refer to
page 68
Comes on although the parking brake
is released: have the brake fluid level
checked. Before continuing your
journey, be sure to read the notes on
pages 132 and 143
Also comes on with the message
"CHECK BRAKE LININGS" in the
Check Control.
Parking brake warning lamp

*
/
brake system hydraulic circuits
for Canadian models.

21n

OverviewControlsMaintenanceRepairsDataIndex

Indicator and warning lamps

Self-leveling suspension

*
l

The level control system is inac-
tive. Please consult the nearest
BMW center.
For additional information: refer to
page 99
Automatic Stability Control plus
Traction (ASC+T)/Dynamic
Stability Control (DSC)

*
l


ASC+T/DSC has been deactivated,
either manually at the button or auto-
matically in response to a system
malfunction. In the event of a malfunc-
tion, have the system checked by your
BMW center.
For additional information: refer to
page 97
Engine-management system

*
There is a fault in the electronic
engine-management system.
You can continue to drive with reduced
engine output and engine speed.
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 146
Service Engine Soon warning
lamp for Canadian models.
Check Filler Cap

*


l

If the indicator lamp comes on
although the fuel cap is secured
correctly: this indicates a malfunction in
the fuel system. Have the system
inspected at your BMW center at the
earliest opportunity.
Additional information: refer to page 25

Green: for your information

Turn signal
Flashes when the turn signal is
on. Rapid flashing indicates a
system malfunction.
For additional information: refer to
page 76
Cruise control
Lights up when the system is
switched on: available for oper-
ation via the multifunction steering
wheel.
For additional information: refer to
page 78
Front fog lamps
Lights up whenever you switch
on the front fog lamps.
For additional information: refer to
page 102

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 76 and 102

82n
Coolant temperature gauge Service Interval DisplayBlueThe engine is still cold. Drive at
moderate engine and vehicle speeds.RedWhen you switch on the ignition, the
warning lamp
* comes on briefly to
confirm that the system is operational.
If the warning lamp lights up during
normal vehicle operation, or the
message "COOLANT TEMPERATURE"
appears in the Check Control
*, the
engine is overheated. Shut off the
engine immediately and allow it to cool
down.
390de007
Between the blue and red zonesNormal operating range. The needle
may rise as far as the edge of the red
sector in normal operation.
Checking coolant level: refer to
page 142.
The range of available displays varies
according to your individual vehicle's
equipment.
Green lampsThe number of illuminated lamps
decreases as the time for your next
maintenance 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

84n
Check Control>"RELEASE PARKINGBRAKE"
>"COOLANT TEMPERATURE"
The coolant is overheated. Stop the
vehicle immediately and switch off
the engine. Refer to pages 82
and 142
>"STOP! ENGINE OILPRESS"
The oil pressure is too low. Stop the
vehicle immediately and switch off
the engine. Refer to pages 19, 140
>"CHECK BRAKE FLUID"
Indicates that brake fluid is down to
roughly minimum level. Have the
reservoir topped up at the earliest
opportunity, refer to page 143. Have
the source of the brake fluid loss
repaired at your BMW center
>"TIRE DEFECT"
*
Reduce vehicle speed immediately
and stop the vehicle. Avoid hard
brake applications. Do not oversteer.
Refer to page 100
>"SELFLEVEL SUSP.INACT"
Please consult the nearest BMW
center. Refer to page 99
>"SPEED LIMIT"
*
Display if the programmed speed
limit has been exceeded, refer to
page 91Priority 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 defined
road speed has been exceeded
>"FASTEN SEAT BELTS"
*
In addition to this message, a
warning lamp with the safety belt icon
appears and an acoustic signal
sounds
>"WASHER FLUID LOW"
Too low; top up fluid at the next
opportunity. Refer to page 139
>"CHECK ENGINE OIL LEV"
The engine oil level is at the absolute
minimum. You should respond by
topping up the oil as soon as
possible, refer to page 140. Do not
continue for more than approximately
30 miles (50 km) before adding oil>"CHECK FILLER CAP"
Inspect the cap to make sure that it is
closed properly, refer to page 24. If
the cap is not closed securely it will
trigger the "Service Engine Soon"
lamp
>"OUTSIDE TEMP. +20 7 (Ð5 6)"
This display is only an example. The
current temperature is displayed at
outside temperatures of +37.5 7
(+3 6) and below. Refer also to
page 80
>"SET TIRE PRESSURE"
*
The RDC has imported the current
inflation pressure in the tires as the
target values which the system will
monitor.
Refer to page 99
>"CHECK TIRE PRESSURE"
*
Check and correct the tire inflation
pressure to specifications at the
earliest opportunity (next stop for
fuel).
Refer to page 99
>"TIRECONTROL INACTIVE"
*
A temporary interference of the RDC
or a system fault. Refer to page 100
>"CHECK BRAKE LIGHTS"
A lamp has failed or the electrical
circuit has a fault. Refer to pages 154
and 160 or consult a BMW center

85n
OverviewControlsMaintenanceRepairsDataIndex
Check Control>"CHECK LOWBEAM LIGHTS"
"CHECK SIDE LIGHTS"
"CHECK REAR LIGHTS"
"CHECK FRONT FOGLAMPS"
"CHECK LICPLATE LIGHT"
"CHECK HIGHBEAM LIGHT"
"CHECK BACK UP LIGHTS"
Defective bulb or circuit. Refer to
pages 151 and following, page 160
or consult your BMW center.
>"TRANS. FAILSAFE PROG"
Please consult the nearest BMW
center. Refer to pages 72 and 75
>"CHECK BRAKE LININGS"
Have the brake pads inspected by
your BMW center. Refer to page 132
>"CHECK COOLANT LEVEL"
Coolant too low, top up at the next
opportunity. Refer to page 142
>"ENGINE FAILSAFE PROG"
*
Indicates a malfunction in the elec-
tronic engine-management system,
which then reverts to an emergency
default program allowing continued
operation at reduced power and
lower engine speeds.
Please have the system inspected at
your BMW center.
Displays after completion of tripAll of the malfunctions registered during
the trip appear consecutively when the
ignition key is turned to position 0.
The following displays will appear when
appropriate:
>"LIGHTS ON"
>"KEY IN IGNITION LOCK"
>"CHECK ENGINE OIL LEV"
Add engine oil at the next opportunity
(next stop for fuel). Refer to
page 140.
This display appears when you open
the driver's door after parking the
vehicle. A supplementary gong is also
heard.
Status reports remain available for a
period of approx. three minutes after
the display goes out and the key is
removed from the ignition. Press the
CHECK button 3. If there were multiple
reports, press the CHECK button
repeatedly to view them all in
sequence.
To check the Check ControlPress the CHECK button 3 with the
ignition key in position 2:
CHECK CONTROL OK appears in the
display.
No malfunctions are present in the
monitored systems.ComputerYou can find a description of the
computer on pages 86 and 91 as well
as in the "Owner's Manual for Onboard
Computer."
You can select the language in
which the Check Control displays
and the status reports from the
computer will appear.<

146n
OBD interface socketThe Onboard Diagnostic (OBD) inter-
face socket is located on the left of the
driver's side at the bottom of the instru-
ment panel and under a cover. The
cover has the letters "OBD" on it.
The purpose of the OBD system is to
ensure proper operation of the emis-
sion control system for the vehicleÕs
lifetime. The system monitors emis-
sions-related components and systems
to detect deterioration and malfunction.390us739
An illuminated lamp informs you
of the need for service, not of
the need to stop the vehicle.
However, the systems should be
checked by your BMW center at the
earliest possible opportunity.
Under certain conditions, the indicator
will blink or flash. This indicates a rather
severe level of engine misfire. When
this occurs, you should reduce speed
and consult the nearest BMW center as
soon as possible. Severe engine misfire
over only a short period of time can
seriously damage emissions-control
components, especially the catalytic
converter.
Service Engine Soon warning
lamp for Canadian models.
When the filler cap is not properly
tightened, the OBD system can
detect the vapor leak and the indicator
will light up. If the filler cap is subse-
quently tightened, the indicator should
go out within a few days.<

Everything from A to Z
177n
OverviewControlsMaintenanceRepairsDataIndex
Brake system132
brake fluid level132
brake pads20, 132
disc brakes132
malfunctions132
Break-in procedures130
Bulbs and lamps151t C
California Proposition
65 Warning145
Capacities173
Car care, refer to the "Caring
for your vehicle" manual
Car wash systems, refer to
the "Caring for your
vehicle" manual
Care of paintwork, refer to
the "Caring for your
vehicle" manual
Care of upholstery materials,
refer to the "Caring for your
vehicle" manual
Cargo area
lamps103
opening from the
inside40
Cargo loading126
Cellular phone117 Center (high-mount) brake
lamp155
Central locking
system32, 37
Changing a wheel/
tire157t
Charge indicator lamp19
CHECK button83
Check Control83t
Check engine oil
level140t
Child seat safety62
Child seats61
Child-restraint systems61
Child-safety locks64
Cigarette lighter118
Clean rear window77
Cleaning windshield77
Climate control, refer to
Automatic climate
control107
Clock88
for additional information
refer to the "Owner's
Manual for Onboard
Computer"
Cockpit14
Code, refer to immoblizer
function94
Cold start67
Combination switch76 Comfort seat51
Compartments116
Computer86
for additional information
refer to the "Owner's
Manual for Onboard
Computer"
remote control95
Computer in the MID91
Configuring personal
adjustments, Vehicle and
Key Memory64
Consumption display81
Consumption, fuel86, 93
Convenience operation of
windows and sliding/tilt
sunroof33
Convenience starting
feature67
Coolant142
Coolant temperature
gauge82
Copyright4
Cover, sun blinds112
Cruising range86, 93
Cup holder117
Cup holder, refer to
beverage holder117
Curb monitor55
D
Data link connector for
Onboard Diagnostics146
Date
calling up88
changing88
Daytime driving lamps101
DBC (Dynamic Brake
Control)20
Deactivating95
alarm system tilt
sensor43
interior motion sensor43
Deep water131
Defrost windows106, 109
Defroster mode106, 109
Digital clock in the MID88
Dimensions169
Dipstick, engine oil140t
Displacement168
Display lighting102
Displays16, 17
Disposal
antifreeze with corrosion
inhibitor142t
used batteries160t
used oils141t