ECU BMW CONVERTIBLE 1998 User Guide

71
At a glanceControls Car careRepairsTechnicalDataIndex
Texts with messages and warnings are
used to alert the driver to defective sys-
tems. In addition, there is a warning
lamp in the instrument panel.
The time and date can be displayed
with the digital clock.
1 Status report symbol
2 Display
3 Plus symbol for additional messages
4 CHECK key
The defective-system messages are
divided into 3 different priorities:
Priority 1These defects are indicated immedi-
ately with the flashing warning lamp and
the flashing warning symbol (1). Several
simultaneous defects are displayed
consecutively. After 20 seconds or
when the CHECK key is pressed, the
warning lamp in the instrument cluster
stops flashing.
The messages continue to be displayed
until the defects are eliminated and can
not be deleted by pressing the CHECK
key (4).
Brake lamp electrical system
The brake lamps have failed. Fuse or
electrical circuit is defective. Refer to
page 151 or consult your BMW Retailer.
360us110Check Control*

Brake lamps defective
Brake lamps have failed - bulbs
defective.
Replace bulbs. Refer to page 143.Priority 2These defects appear when the ignition
key is in position 2. The warning sym-
bols remain after the message disap-
pears. If the plus symbol (3) appears:
Additional messages are present and
can be displayed by pressing the
CHECK key.
1 Brake lamp defective
A bulb has failed. Refer to page 143.
Low beams defective,
Backup lamps defective,
License plate lamp
Bulb has failed or fuse or electrical
circuit defective. Refer to pages 141,
143, 145 or visit a BMW Retailer.
Washer fluid low
Too low, top up at next opportunity.
Refer to page 124.
Check Control inactive
Messages and warnings can not be
displayed. See BMW Retailer.

72
Priority 3These status reports usually appear
after the car is parked and the ignition
key returned to position 0 (if several
messages have been recorded, they will
appear consecutively, with Priority 3
messages following Priority 1 and 2
messages).
Messages remain available for a period
of approx. two minutes after the display
goes out and the ignition key has been
removed, and can be displayed by
pressing the CHECK key.
The messages can also be displayed
before you start driving with the ignition
key in position 2. The texts then go out
after a short time or when you start driv-
ing, and no warning symbols remain.
Messages are not displayed again until
the ignition key is turned to position 0.
If a plus symbol appears: display addi-
tional messages by pressing the CHECK
key.Check coolant levelIndicates that coolant is almost down to
minimum level. Top up at the next
opportunity. Refer to page 127.To check the Check Control display
(only when no messages are displayed):
Press the CHECK key with the ignition
key in position 2: CHECK CONTROL
OK appears in the display.
EntriesAll numbers for the time and date are
entered with the entry keys according
to the following principle:
The numbers can be entered in any
order. Each time the key is pressed, or
for each half second the key is held
down, the numerical value increases by
one.To display time and datedPress the respective function key
(CLOCK/DATE).
When the ignition key is in position 0 or
removed, the displays appear for a few
seconds; in ignition key position 1 the
desired value is displayed indefinitely.
AM
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1000 1001 10
Check Control*

97
At a glanceControlsCar careRepairsTechnicalDataIndex
BMW Convertible - loading the ski
bagRemoving filler piece.Detach cut-out trim at bottom.
Extend the ski sack between the front
seats. The zipper provides convenient
access to the inside of the sack, and
can also be left open to promote drying.
b
When remounting the trim, press it
firmly onto the guide rod at the bot-
tom.cOpen the cover panel from the luggage
compartment and use the magnetic
retainers to attach it to the lower side of
the rear shelf within the luggage com-
partment.
b
Secure the stored skis or other
objects by tightening down the strap on
the ski bag at the buckle.c
For general information on the ski bag,
refer to page 95.
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Ski bag*

98
Stowing a loadIf you are transporting a load in your
BMW
dStow a heavy load as far forward as
possible - directly behind the back-
rests or the front wall of the luggage
compartment - and on the ßoor.
dCover sharp edges and corners.
dDo not pile objects higher than the
top edge of the backrest.
dIf the load is heavy and the rear seat
is unoccupied, put the outer safety
belt in its lock.
Securing loaddSecure smaller, lighter items with
retaining straps or draw straps (refer
to page 34).
dFor large, heavy items, see your
BMW Retailer for load-securing
devices
*. The lashing eyes on the
corners of the luggage compartment
are used to attach these straps.
dObserve the information enclosed
with the load-securing devices.
a
Always position and secure the
load correctly, otherwise it can endan-
ger the passengers in the event of brak-
ing or swerving.
Do not exceed the permissible gross
weight and axle load (refer to page 16 3),
otherwise the vehicle's operating safety
is no longer assured and does not com-
ply with traffic laws.
Do not stow heavy or hard objects in the
passenger compartment, otherwise
they would be thrown around during
braking and evasive maneuvers and en-
danger the occupants.c
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Cargo loading

10 3
At a glanceControlsCar careRepairsTechnicalDataIndex
ABS enhances active safety by helping
to prevent the wheels from locking under
braking. When the front wheels slide, the
driver loses steering control over the
vehicle. Traction loss at the rear wheels
can cause the rear end to break into
uncontrolled oversteer.
ABS is designed to meet two essential
requirements during every application:
dto help provide vehicle stability on all
types of road surface (asphalt,
cement, dirt, moisture, snow and ice).
dto help to retain steering and maneu-
vering capability under the same con-
ditions.
However, certain important consider-
ations must be borne in mind in connec-
tion with these requirements:
Not even ABS can suspend the normal
laws of physics. ABS alone can not pre-
vent accidents when the brakes are
applied without an adequate safety
interval between vehicles, when the car
reaches excessive rates of lateral accel-
eration in curves, or if aquaplaning
occurs. Responsibility for these types of
situations remains in the hands (and feet)
of the driver. You should never allow the
added safety of ABS to lull you into a
false sense of security, or mislead you
into taking increased risks that could
affect your own safety and that of others.
Driving with ABSThe yellow ABS warning in the instru-
ment panel goes out as soon as the
engine is started.
The system becomes operative once the
vehicle exceeds a speed of 5 mph
(8 km/h). The ABS is deactivated when-
ever the vehicle's speed drops below
approx. 2 mph (3 km/h). This means that
the wheels can lock in the Þnal phase of
a braking action - a factor of no signiÞ-
cance in actual practice.
The ABS system closed-loop control cir-
cuit cycles in fractions of a second. A
pulsation at the brake pedal indicates to
the driver that ABS is active, that is, that
the car is within its maximum braking
range. In addition, the audible pulsation
that accompanies the control operation
calls your attention to the reduced trac-
tion between tires and road surface
(marginal adhesion), and reminds you
that the vehicle's speed should be
reduced to adapt to road conditions.On road surfaces featuring a loose top
layer on a Þrmer substratum, e.g., on
gravel or snow, the braking distances
with ABS may be longer than with the
wheels locked. However, ABS continues
to provide enhanced vehicle and steer-
ing control under these conditions.
a
To ensure that the system remains
completely operational, never modify the
ABS. Service procedures on ABS are to
be performed by authorized technicians
only.c
ABS may fail to function with maximum
efÞciency when tires of different sizes
are mounted (e.g., winter tires/spare tire;
remount the correct tires at all wheels as
soon as possible).
In the event of a fault, the ABS warning
lamp in the instrument cluster lights up,
refer to page 18. The braking system
then reverts to conventional operation as
on a vehicle without ABS. However,
have the brake system checked by your
BMW Retailer as soon as possible. To
prevent undetected defects and cumu-
lative faults from adversely affecting the
brake system, refer any problems to
your authorized BMW Retailer at the
earliest opportunity.
Antilock Brake System (ABS)

10 7
At a glanceControlsCar careRepairsTechnicalDataIndex
A special luggage system is available as
an option for your BMW. Please
observe the precautions included with
the installation instructions.
Because roof racks raise the center of
gravity of the car when loaded, they
exercise a major effect on its handling
and steering response.
You should therefore always remember
not to exceed the approved roof weight,
the approved gross vehicle weight or
the axle weights when loading the rack.
For specifications refer to "Technical
data", page 163ff.
Make sure that the load is not too heavy,
and attempt to distribute it evenly.
Always load the heaviest items first (on
the bottom).
Make sure there is sufficient space to
raise the sliding/tilt sunroof.Secure the roof luggage correctly and
securely to prevent it from shifting or
being lost during driving (danger to fol-
lowing traffic).
Drive smoothly: avoid sudden accelera-
tion and braking maneuvers; corner
gently.
The roof load increases the surface
area exposed to the wind: increased
fuel consumption and stress on the roof
are the immediate results.Roof-mounted luggage rack*

11 8
Unlocking Pull the lever located under the left-
hand side of the instrument panel.a
Do not work on your vehicle with-
out appropriate skills. Always switch off
the engine and allow it to cool down be-
fore working in the engine compart-
ment.
Always disconnect the battery before
working on the electrical system. When
working on the vehicle, follow the rele-
vant instructions and information. When
you are not familiar with the relevant
specifications, have service operations
performed by your authorized BMW Re-
tailer. Failure to proceed in an informed,
professional manner when servicing
components and materials constitutes a
safety hazard for yourself and other us-
ers of the public roads.c
To openPush the release handle Ð at the front
left under the hood Ð upward and open
the hood.
To closeSimultaneously press down both sides
of the hood; continue pressing until you
hear the latches engage.a
Should you determine that the
hood is not completely closed while
driving, stop immediately and close it
securely.c
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BMW360de307
BMW
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Hood

13 0
The BMW Maintenance System has
been designed as a reliable means of
providing the customer with maximum
vehicle safety and reliability with mini-
mum complication and expense.
Please remember that regular periodic
maintenance plays an essential part in
ensuring continued vehicle security. It
also helps maintain the resale value of
the vehicle.
Service Interval DisplayAdvanced technology is employed to
calculate the optimal maintenance
intervals, which are then indicated in
the Service Interval Display. While con-
ventional maintenance systems rely on
mileage alone to determine when ser-
vice is due, the BMW Maintenance Sys-
tem reflects the actual conditions under
which the vehicle is operated, because
mileage is not simply mileage:
From the point of view of maintenance,
62,000 miles (100,000 km) accumulated
in short-distance driving are not the
equivalent of the same distance cov-
ered in long-distance highway travel.
The BMW Maintenance System
includes the Engine Oil Service as well
as Inspections I and II.
Determining the maintenance intervals
according to the actual loads on the car
covers every kind of operating situation.
However, drivers who cover only
extremely short distances - substantially
less than 6,200 miles (10,000 km) annu-
ally - should have the engine oil changed
at least once a year, as it continues to
age whether or not the car is used on a
regular basis.
Service and Warranty Information
bookletPlease refer to the Service and War-
ranty Information booklet for additional
information on maintenance intervals
and procedures.
Depending on operating conditions, as
a precaution against rust it may be a
good idea to have the body checked for
stone damage and chips at the same
time.
Please ensure that all maintenance
operations are entered in the Service
and Warranty Information booklet upon
completion. These entries will consti-
tute your proof that the vehicle has
received regular maintenance. They
are also required for warranty claims.b
Have your BMW Retailer carry out
the maintenance and repair. Your BMW
Retailer is always informed on the latest
maintenance work and repair tech-
niques and equipped with the required
special tools. In addition, the testing of
parts known from experience to be sub-
ject to wear is a permanent part of the
maintenance specifications.c
360us009The BMW Maintenance System

13 5
At a glanceControlsCar careRepairsTechnicalDataIndex
Leather careThe leather upholstery
* used by BMW
is a natural product of the highest qual-
ity, processed using state-of-the-art
methods to ensure that it will maintain
its high quality for years to come, pro-
vided that it is properly cared for.
Because this product is manufactured
using natural materials, you must make
allowance for its special characteristics
as well as for the peculiarities of its use
and care.
Regular periodic cleaning and care are
essential, as dust and road dirt act as
abrasives in the pores and creases of
the material. This leads to wear spots
and premature brittleness on the sur-
face of the leather. We therefore sug-
gest that you clean the leather with a
vacuum cleaner or dust cloth at frequent
intervals.
For cleaning, use BMW leather cleaning
foam.
As dirt and grease can slowly attack the
protective layer of the leather, the
cleaned leather surfaces must be
treated with BMW Leather Care. This
serves also as an anti-static agent.
To protect against moisture and water
you can treat the leather with BMW
Impregnating Agent.We recommend that you perform this
procedure twice a year on leather ex-
posed to normal use.
Spills should be wiped up immediately.
Remove grease and oil stains without
rubbing, but rather by dabbing with
spot remover.
If the upholstery is to be exposed to
intense sunlight or if the vehicle is to be
stored for an extended period, cover all
leather surfaces (or, better yet, the win-
dows) to prevent fading.
a
Cleaning agents can contain dan-
gerous or unhealthy ingredients. There-
fore always observe the warnings and
danger notices on the package.
Open the doors or windows on your ve-
hicle when cleaning the interior.
Never clean your vehicle with solvents
or other materials not specifically in-
tended for this application.c
Caring for your car

14 7
At a glanceControlsCar careRepairsTechnicalDataIndex
Procedure1 Wheel bolt cover
* removal.
Steel disk wheel: remove wheel cover
by hand. Light-alloy wheel with lug
cap in the shape of a large hexagon
nut: position the hexagon adapter on
the lug bolt cover, apply the lug
wrench and turn it to the left.2 Loosen lug bolts 1/2 turn.
3 Remove the respective cover cap
from the jacking point. Depending on
the vehicle version, remove the pro-
tective cap either by inserting the
screwdriver into the slot and turning
to the left (arrow in left illustration) or
by pressing in the cap on the bottom
(arrow in illustration above).4 Insert the jack all the way into the
support while ensuring that the base
of the jack is securely positioned on
the road surface. Always chock the
wheels to prevent the vehicle from
rolling.
5 Turn the handle to raise the jack until
the wheel is free of the ground.
a
The vehicle jack is designed for
changing tires only. Never use it to raise
another vehicle model or a load of an-
other kind, since that could result in ac-
cidents and personal injury.
Never lie beneath the vehicle when it is
supported by the jack Ð risk of fatal inju-
ry!c
6 Unscrew the lug bolts and remove the
wheel.
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360de109
Changing tires