BMW 3 1992 - Page 8

Please read these warnings and cautions
before proceeding with
maintenance and repair work .
CAUTION-
" See also Warnings on page
vi¡

" Before doing any electrical welding
on cars equipped with ABS,
disconnect the battery negative (-) terminal (ground strap) and the
" If you lack the skills, tools and equipment, or
a suitable work-

ABS control unit connector .
shop for any procedure described in this manual, we suggest you
leave such repairs to an authorized BMW dealer or other qualified

" On cars equipped with anti-theft radios, make sure you know the
shop .

correct radio activation code before disconnecting the battery or
removing the
radio . lf the wrong code is entered into the radio
" BMW is constantly improving
its cars and sometimes these

when power
is restored, that radio may lock up and be rendered
changes, both in parts and specifications, are made
applicable to

inoperable, even if the correct
code is then entered .
earlier models . Therefore, part numbers listed in this
manual are
for reference
only . Always check with your authorized BMW dealer

" Always make sure ignition is off before disconnecting
battery .
parts department for the
latest information .
" Label battery cables before disconnecting . On some models,
" Before starting a job, make certain
that you have all the neces-

battery
cables are not color coded .
sary tools and parts on hand . Read
al¡ the instructions thoroughly,
do not attempt shortcuts . Use tools appropriate
to the work and

"
Disconnecting the
battery may erase fault code(s) stored in con-
use only replacement parts meeting BMW specifications .
Make-

trol module
memory Using special BMW diagnostíc equipment,
shift
tools, parts and procedures will not make good repairs
.

check for fault codes prior to
disconnecting the battery cables . If the
Check Engine light is illuminated, see
100 Engine-General for
" Use pneumatic
and electric tools only to loosen threaded parts

On-Board Diagnostics (OBD) fault code
information . lf any other
and fasteners . Never use these
tools to tighten fasteners, espe-

system faults have been detected (indicated
by an ílluminated
cially on light alloy parts . Always use
a torque wrench to tighten

warning light), see an authorized BMW dealer .
fasteners
to the tightening torque specification listed
.
" If a normal
or rapid charger is used to charge battery, the battery
" Be mindful of the
environment and ecology . Before you drain the

must be disconnected
and removed from the vehicle in order to
crankcase, find out the
proper way to dispose of the oil . Do not

avoid damaging paint and upholstery
pour oil onto the ground,
down a drain, or into a stream, pond or
lake
. Dispose of in accordance with Federal,
State and Local laws .

"
Do not quick-charge the battery (for boost
starting) for longer
than one minute . Wait at least one
minute before boosting the bat-
e If battery
power is lost or the battery has been
disconnected, the

tery
a second time .
power
windows must be re-initialized . Both one touch
up/down
and pinch-protection
will be inactive until windows are
re-initial-

"
Connect and
disconnect a battery charger only with the battery
ized . See 512 Door Windows
.

charger switched off .
" The
control module for the anti-lock
brake system (ABS) cannot
withstand
temperatures from a paint-drying
booth or a heat lamp
in excess of 203°F
(95°C) and should not be subjected
to temper-
atures in excess of
185°F (85°C) for more than two hours .
" Sealed or "maintenance free"
batteries should be slow-charged
only, at an amperage rate that
is approximately 10% of the bat-
tery's
ampere-hour (Ah) rating .
" Do not allow
battery charging voltage to exceed
16 .5 volts . If the
battery begins
producing gas or boiling violently, reduce the
charg-
ing rate . Boosting
a sulfated battery at a high charging
rate can
cause an explosion .