check engine BMW 760LI SEDAN 2003 User Guide

Technology for comfort, convenience and safety
98
Flat Tire Monitor*
The concept
The Flat Tire Monitor keeps track of the
inflation pressures in your tires as you
drive. The system provides an alert when-
ever the inflation pressure drops signifi-
cantly below the specified pressure in one
or more tires.
In order for the Flat Tire Monitor to 'learn'
the correct tire inflation pressure, check the
inflation pressure in all tires against the
inflation pressure table on page 185 and
make corrections as necessary. Then pro-
ceed to initialize the system.
This symbol will appear in the
Check Control to inform you that
the inflation pressure of a tire has
fallen significantly. A text message appears
at the same time.
Please take note of the additional informa-
tion in the Control Display.
You can find more information on the
Check Control starting on page 85.
The Flat Tire Monitor cannot indicate
sudden severe tire damage caused
by outside factors and does not detect a
natural, even pressure drop in all four
tires.<
Initializing the system
1.Switch ignition on, do not start the
engine
2.Select "RPA" from the "Settings" menu
and confirm your selection. The initial-
ization menu appears.
"YES"
Select and confirm. The Flat Tire Monitor
starts an automatic 'learning' process as
the car is driven, and memorizes these ref-
erence pressures. This one-off learning
takes at least 10 minutes, after which the
Flat Tire Monitor is able to detect and indi-
cate a flat tire.
Repeat this process after any changes in
tire inflation pressure, tire rotation or
replacement.
"NO"
Select and confirm to return to the "Set-
tings" menu.
Flat tire
The symbol will light up red, accompanied
by a status message in the Check Control.
>Vehicles with standard tires:
If this occurs, reduce vehicle speed
immediately and stop the vehicle. Avoid
hard and sudden steering and braking
maneuvers. Replace the defective tire
>Vehicles with run-flat tires:
If this occurs, carefully but quickly
reduce vehicle speed to below 50 mph
(80 km/h). Avoid hard and sudden
steering and braking maneuvers.
Additional information on run-flat tires
is provided on page 186.
Please take note of the additional informa-
tion in the Control Display.

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125
undermining your ability to steer and brake
the vehicle.<
Driving through water
Do not drive through water on the
road if it is deeper than 1 ft (30 cm),
and then only at walking speed at the most.
Otherwise, the vehicle's engine, the elec-
trical systems and the transmission may be
damaged.<
Brake system
Braking with ABS
The best way to achieve optimal response
from the ABS is to apply maximum pres-
sure to the brake pedal during emergencyÐ
panic stops. Since the vehicle maintains
steering responsiveness, you can never-
theless avoid possible obstacles with a
minimum of steering effort.
Pulsation at the brake pedal combines with
sounds from the hydraulic circuits to indi-
cate to the driver that ABS is in its active
mode.
Do not drive with your foot resting on
the brake pedal. Even light but con-
sistent pedal pressure can lead to high
temperatures, brake wear and possibly
even brake failure.<
Disc brakes
Driving in wet conditions
While driving in wet conditions and in
heavy rain, it is a good idea to apply light
pressure to the brake pedal every few
miles. Monitor traffic conditions to ensure
that this maneuver does not endanger
other road users. The heat generated in this
process helps dry the pads and rotors to
ensure that full braking efficiency will then
be available when you need it.
Hills
You can retain full and unimpaired braking
efficiency by downshifting to a gear in
which only minimal brake applications are
needed when descending long or steep
downhill stretches.
You can further enhance the engine's bra-
king effect by selecting a lower gear in the
automatic transmission's manual mode,
downshifting as far as first gear on extre-
mely steep stretches, refer to page 68. This
strategy helps you avoid placing excessive
loads on the brake system.
Never allow the vehicle to coast with
the transmission in Neutral Ð or with
the engine switched off Ð there is no engine
braking when the transmission is in Neu-
tral, and no power-assist for brakes and
steering when the engine is not running.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
accelerator and brake pedals and obstruct
their movement.<
Corrosion
When the vehicle is driven only occasio-
nally, during extended periods when the
vehicle is not used at all, and in operating
conditions where brake applications are
less frequent, there is an increased ten-
dency for corrosion to form on rotors, while
contaminants accumulate on the brake
pads. This occurs because the minimal
pressure which must be exerted by the
pads during brake applications to clean the
rotors is not reached.
Should corrosion form on the brake rotors,
the brakes will tend to respond with a pul-
sating effect that even extended applica-
tion will fail to cure.
Brake pads
If the brake pad wear warning lamp
appears in the Check Control,
accompanied by a text: please take
careful note of the additional information in
the Control Display.

Refueling
182
Refueling
Fuel filler door
Always switch off the engine before
refueling. If you do not, fuel cannot be
filled into the tank and a message in the
Check Control will appear.<
To open and close: press the rear edge of
the fuel filler door.
Manual release
In the event of an electrical defect in the
system, you can release the fuel filler door
manually:
1.Lift the handle to remove the cover
panel on the right side of the luggage
compartment
2.Take the button with the fuel pump
symbol from the bracket and pull it to
unlock the fuel filler door.
Always observe all applicable precau-
tions and regulations when handling
fuels. Never carry spare fuel containers in
your vehicle. Whether empty or full, these
containers can leak, cause an explosion,
and lead to fire in the event of a collision.<
Simple and environmentally friendly
When handling fuels always observe
any safety guidelines posted at the fil-
ling station.<
Put the filler cap in the bracket attached to
the fuel filler door.
When refueling, insert the filler nozzle com-
pletely into the filler pipe. Pulling the nozzle
out of the pipe during refueling
>results in premature pump shutoff
>can lead to reduced efficiency in the
fuel-vapor recovery system.
The fuel tank is full when the filler nozzle
clicks off the first time.
Close the filler cap carefully after refu-
eling, continuing until you hear the
detent engage. While closing, be sure not
to squeeze the strap which is fastened to
the cap. A loose or missing cap will activate
a message in the Check Control.<
Fuel tank capacity: approx. 23.2 US gallons
(88 liters), including the reserve capacity of
approx. 2.6 gallons (10 liters).
Never attempt to continue driving
until the tank is completely empty, as
engine functions could be affected, and the
vehicle could sustain damage as a result.<

Under the hood
190
Engine compartment
1Engine oil dipstick, see below,
Checking oil level
2Brake fluid reservoir, located beneath
the microfilter cover192
3Reservoir for windshield and headlamp
washer system73
4Engine oil filler neck191
5Coolant expansion tank192
6Auxiliary terminal for jump starting203
Engine oil
Checking oil level
1.Park the vehicle on a level surface
2.Switch the engine off after it has
reached normal operating temperature
3.After approx. 5 minutes, pull the dip-
stick out and wipe it off with a clean lint-
free cloth, paper towel, or similar mate-
rial
4.Carefully push the dipstick all the way
into the guide tube and pull it out again
5.The oil should extend to between the
two marks on the dipstick.
As is the case with fuel economy, the rate
at which the engine uses oil is strongly
influenced by driving style and operating
conditions.

Under the hood
192
Checking coolant level
Correct coolant level with the engine cold
Ð approx. +687 (206):
1.Turn the cap of the expansion tank
counterclockwise to allow any accumu-
lated pressure to escape, then continue
turning to open
2.The coolant level is correct when the
coolant extends to between the MIN
and MAX marks on the filler neck, refer
to the diagram adjacent to the filler
neck
3.If the coolant is low, slowly add coolant
up to the specified level Ð do not overfill.
Brake fluid
The symbol lights up and a mes-
sage appears in the Check Control
panel:
The brake fluid in the reservoir has fallen to
below the minimum level.
The brake fluid reservoir is located under
the microfilter housing trim panel on the
driver's side of the vehicle. To have brake
fluid added to the system, or to have the
source of any brake fluid loss traced and
rectified, please contact your BMW center,
which can also supply the factory-
approved Ð DOT 4 Ð brake fluids.
Brake fluid is hygroscopic: it absorbs
moisture from the atmosphere over
the course of time.
To ensure that the brake system continues
to provide safe and reliable performance,
remember to have the brake fluid changed
every two years at the latest, refer to
page 84 and to the Service and Warranty Information Booklet for US models or the
Warranty and Service Guide Booklet for
Canadian models.
Brake fluid is toxic and also damages
vehicle paintwork. Always store these
agents in tightly-closed original containers
kept well away from the reach of children.
Do not spill the fluid and do not refill the
brake fluid reservoir to beyond the MAX
mark. Should it come into contact with hot
engine components, the brake fluid could
ignite and cause personal injury in the form
of burns.<
Always observe all applicable envi-
ronmental rules and regulations when
disposing of used brake fluid.<
Warning lamp for Canadian models.
Brake hydraulic systems
A low brake-fluid level combined with
longer-than-usual pedal travel could be a
sign that one of the brake system's
hydraulic circuits has failed.
Proceed to the nearest BMW center.
Remember that pedal travel may be
increased, and there may also be a sub-
stantial increase in the amount of pedal
pressure required to brake the vehicle.
Please adapt your driving style accor-
dingly.<

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Maintenance
The BMW Maintenance
System
The BMW Maintenance System is desi-
gned to ensure that your vehicle will con-
tinue to furnish consistent reliability com-
bined with optimal safety. The service
schedule also includes operations related
to the vehicle's comfort and convenience
features, such as replacement of the filters
for the inside air. The ultimate object is to
furnish economical maintenance by provi-
ding the ideal service for your individual
vehicle.
Should the day come when you decide to
sell your BMW, you will find that a complete
dealer service history is an asset of inesti-
mable value.
CBS Condition Based Service
CBS is a more advanced version of the Ser-
vice Interval Display. Sensors combine with
highly-specialized algorithms to supply
service information that reflects your
vehicle's actual operating conditions more
precisely than ever before.
The system now furnishes individual dis-
plays of the times remaining until the dead-
lines for specific service operations as well
as official state inspections:
>Engine oil
>Brakes Ð separate for front and rear
>Particle/activated-charcoal filter
>Brake fluid >Spark plugs
>Vehicle check
>Coolant
>Official state inspections.
CBS monitors both current and upcoming
service requirements. After accessing the
data stored in the vehicle's key, your BMW
service advisor is able to suggest precisely
the right array of service procedures for
your own individual vehicle.
By letting you define a service and mainte-
nance regimen that reflects your own indi-
vidual requirements, Condition Based Ser-
vice builds the basis for trouble-free
driving.
You can find more detailed information on
the Service Interval Display on page 83.
Service and Warranty Information
Booklet for US models and Service
Guide Booklet for Canadian models
Please consult your Service and Warranty
Information Booklet for US models and
Service Guide Booklet for Canadian
models for additional information on ser-
vice requirements.
Have service and repair operations
performed at your BMW center.
Take the time to ensure that these service
procedures are confirmed by entries in
your vehicle's Service and Warranty Infor-
mation Booklet for US models and Service
Guide Booklet for Canadian models. These
entries verify that your vehicle has received
the specified regular maintenance, and
may also be required when submitting war-
ranty claims.<
Care
You can find everything you need to know
on this topic by consulting the separate
Care manual.

Rules and regulations
194
Rules and regulations
California Proposition 65
Warning
California laws require us to state the fol-
lowing warning:
Engine exhaust, some of its constitu-
ents, and certain vehicle components
contain or emit chemicals known to the
State of California to cause cancer and
birth defects and reproductive harm. In
addition, certain fluids contained in
vehicles and certain products of compo-
nent wear contain or emit chemicals known
to the State of California to cause cancer
and birth defects or other reproductive
harm.
Battery posts, terminals and related acces-
sories contain lead and lead compounds.
Wash your hands after handling.
Used engine oil contains chemicals that
have caused cancer in laboratory animals.
Always protect your skin by washing tho-
roughly with soap and water.<
OBD connector
The Onboard Diagnostic Ð OBD Ð interface
socket is located on the left of the driver's
side under the instrument 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 emission
control system for the vehicle's lifetime.
The system monitors emission-related components and systems for deterioration
and malfunction.
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 emis-
sions control components, especially the
catalytic converter.
When the fuel 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 subsequently
tightened, the indicator should go out
within a few days.<

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Replacing components
Onboard tool kit
The onboard tool kit is located in the lug-
gage compartment lid.
Loosen the wingnut to open.
The adapter for the spare key can be stored
beneath the open-ended spanners.
Windshield wiper blades
To replace the blades, start by folding the
wipers out and away from the windshield,
refer to page 73.
Lamps and bulbs
The lamps and bulbs are essential factors
contributing to the safety of your vehicle.
Therefore, comply fully with the following
instructions during bulb replacement. If you
are not familiar with the specified proce-
dures, have the replacements carried out at
your BMW center.
Never touch the glass on new bulbs
with your bare fingers, as even minute
amounts of contamination will burn into the
bulb's surface and reduce its service life.
Use a clean cloth, napkin, etc., or hold the
bulb by its metal socket.<
You can obtain a selection of replacement
bulbs at your BMW center. To prevent short circuits, before wor-
king on any electrical system, equip-
ment or accessory you should always
switch it off and disconnect the cable from
the battery's negative terminal before star-
ting.
To avoid possible injury or equipment
damage when changing bulbs, observe any
instructions provided by the bulb manufac-
turer.<
When maintaining the headlamps,
please comply with the instructions in
the separate Care manual.<
Headlamps
For checking and adjusting headlamp
aim, please contact your BMW
center.<
Engine compartment, left side:
Turn the quick-release fasteners 905 coun-
terclockwise and remove the cover.
After replacing the bulb return the cover to
its original position and press the quick-
release fasteners down.

Replacing components
200
Run-flat tires*
You will recognize run-flat tires by a cir-
cular symbol containing the letters RSC on
the side of the tire. They consist of self-
contained tires and special rims. The tire
reinforcement ensures that the tire retains
some residual safety in the event of pres-
sure drop and driving remains possible to
a restricted degree. The vehicle is
equipped with a Flat Tire Monitor or TPM
Tire Pressure Monitor which indicates
punctures.
The reinforcement on the flanks of the
tires means that it is usually not pos-
sible to detect an air loss from outside.<
Flat tire
If you have a flat tire, the indicator lamp
symbol in the Check Control will light up in
red, and a message will appear. In addition,
a gong sounds.
Detailed information on the Flat Tire Mon-
itor or TPM Tire Pressure Monitor can be
found on page 98 or 99.
Reduce vehicle speed carefully to under
50 mph (80 km/h), avoiding hard brake
applications and steering maneuvers.
If the defective wheel is not recognizable
as such immediately, check the inflation
pressure in all four tires.
For reasons of safety, do not arrange
for run-flat tires to be repaired. Your
BMW center has the information needed
for working with these tires and is equipped
with the necessary special tools.<
Continuing driving with a damaged
tire
Driving on run-flat tires can continue
depending on the vehicle load and the
severity of the tire damage, at a maximum
speed of 50 mph (80 km/h). You can deter-
mine the possible mileage for continued
driving on the basis of the following general
indications:
>Tire inflation pressure 0 psi/kPa:
With empty vehicle approx. 90 miles
(150 km)
With full payload approx. 30 miles
(50 km)
>Tire inflation pressure 7 psi/50 kPa Ð
15 psi/100 kPa:
Approx. 300 miles (500 km)
>Tire inflation pressure greater than
15 psi/100 kPa:
approx. 600 miles (1000 km).
Drive reservedly and do not exceed a
speed of 50 mph (80 km/h). In the
case of air loss, you can expect changes in
vehicle handling such as reduce lane sta-
bility, longer braking distances, and
changes in self-steering properties.<
Battery
Battery care
The battery is 100 % maintenance-free, i.e.,
the electrolyte will last for the life of the bat-
tery when the vehicle is operated in a tem-
perate climate.
For all questions that regard the bat-
tery, please consult your BMW
center. Since the battery is maintenance-
free, the following is for your information
only.<
Charging the battery
Only charge the battery in the vehicle via
the terminals in the engine compartment
with the engine off. Connections, refer to
Jump-starting on page 203.

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To avoid short circuits, as well as pos-
sible fires and personal injury, always
disconnect the cable from the battery's
negative terminal before working on the
vehicle's electrical system.<
Battery switch
Before storing the vehicle for an extended
period of several weeks or more, slide the
battery switch located behind the trim
panel on the right side of the luggage com-
partment to OFF. This reduces the current
flow from the battery for the period during
which the vehicle remains parked.
A message appears in the Check Control
panel. Please take note of the supplemen-
tary information provided in the Control
Display.
Never disconnect either battery cable
from its terminal while the engine is
running Ð the resulting voltage surge would
destroy the vehicle's electronic systems.<
Disposal
Return used batteries to a recycling
point or your BMW center. Maintain
the battery in an upright position for trans-
port and storage. Always restrain the bat-
tery to prevent it from tipping over during
transport.<
Fuses
Spare fuses are located on the fuse strip in
the glove compartment; plastic tweezers
can be found at the fuse holder in the lug-
gage compartment.
In the glove compartment
Press the tab on the cover to the front, then
fold up the cover.
Never attempt to repair a blown fuse,
and do not replace a defective fuse
with a substitute of another color or
amperage rating, as this could lead to a cir-
cuit overload, ultimately resulting in a fire in
the vehicle.<
In the luggage compartment
Use the handle to pull down the trim on the
right wall.