rear light wiring BMW 325i 1994 E36 Workshop Manual

General
Data
and



010
FundamentalsfortheDo-lt-YourselfOwner

Maintenance



020
Maintenance
Program

Engine

Transmission

Suspension,

Steering
and

Brakes

4
Body

100
Engine-General

110



Engine
Removal
and
Installation
113



Cylinder
Head
Removal
and
Installation
116



Cylinder
Head
and
Valvetrain
117



Camshaft
Timing
Chain

119



Lubrication
System

200
Transmission-General
210
Clutch
230
Manual
Transmission

510



Exterior
Trim,
Bumpers



520



Seats

Bo
y
Equipment



512
DoorWTdws



540



nr
t

513



InteriorTrim



541



Convertible
Top

515



Central
Locking
and
Anti-Theft

600



Electrical
System-General



620



Instruments

Electrical
S



stem
610
Electrical
Component
Locations



630
Exterior
Lighting

611



Wipers
and
Washers



640



Heating
and
Air
Conditioning

6



612



Switches
and
Electrical
Accessories



650



Radio

Equipment
and



720
SeatBelts

Accessories



721
Airbag
System
(SRS)

Electrical
Wiring

Diagrams

Foreword
.
...
.
.
.
..................
.
.
.
.....
.
............
.
...
.
.
.
.
.
................
.
.
.
.....
.
......
.
................
.
.
.
.....
v

Warnings
and
Cautions
.....
.
...
.
.
.
.
.
..........
.
...
.
.
.
.
.
......
.
.........
.
.
.
...
.
.
.
......
.
.
.
.
.
............
.
.
.
.
.
.
.vii

Index
..............
.
.
.
.....
.
............
.
...
.
.
.
.
.
........
.
...
.
.
.
.
.
.......
.
......
.
...
.
.
.
.
.
.
.
........
.
.
.
..
back
of
book

300



Suspension,
Steering
and



330



RearSuspension

Brakes-General



331



Final
Drive

310



Front
Suspension



340



Brakes

320



Steering
and
Wheel
Alignment

400
Body-General



411
Doors

410



Fenders,
Engine
Hood



412



Trunk
Lid

120



Ignition
System
121



Battery,Starter,
Alternator
130



Fue¡
Injection
160



Fuel
Tank
and
Fuel
Pump
170



Radiator
and
Cooling
System180



Exhaust
System

240



Automatic
Transmission
250



Gearshift
Linkage

260
Driveshaft

119-2



LUBRICATION
SYSTEM

NOTE-
Component
Location



If
the
light
does
not
go
out,
thewiring
to
theswitch
is"
Oil
pressure
switch



most
likely
grounded
somewhere
between
the
switch

all
engines
.......
...
.
..
......
ora
oil
filter
housing



terminal
and
the
warning
light
.
Sea
Electrical
Wiring

Diagrams
atrearof
manual
for
electrical
schematics
.

CAUTION-

Some
oil
may
drain
out
as
the
oil
pressure
switch
is
removed
.
Use
a
rag
to
soak
up
any
spills
.

2
.
Install
pressure
gauge
in
place
of
switch
.

3
.
With
gauge
instalied,
start
engine
and
allow
to
reach

operating
temperature
.
Check
oil
pressureboth
cold

and
hot
.

NOTE-

For
the
most
accurate
test
results,
the
engine
oil
(and
filter)
shouldbe
newand
of
the
correct
grade
.

Oil
Pressure

"
¡dle
(mínimum)
..
.
.
..............
.
.
0
.5
bar
(7psi)

"
Regulated
pressure
(elevated
engine
speed)

4-cylinder
engines
..
......
4
.3
±
0
.2
bar
(63
t3
psi)

6-cylinder
engines
.
.
.............
.
4
.0
bar
(59
psi)

4
.
Remove
pressure
gauge
and
reinstall
pressure
switch
.

If
testing
shows
low
oil
pressure,
one
or
more
of
the
follow-

ing
conditions
may
be
indicated
:
OIL
PAN

"
Worn
or
faulty
oii
pump
.

"
Worn
or
faulty
engine
bearings



The
oil
pancan
be
removed
with
the
engine
instalied,
al-

Severe
engine
wear
.



though
specíal
enginesupport
equipment
will
be
needed
.

Al¡
of
these
conditionsindicate
the
need
for
major
repairs
.

Oil
pressure
warning
system,
testing

When
the
ignition
is
tumed
ora,
the
oil
pressure
warning
light

comes
ora
.
When
the
engine
ís
started
and
the
oil
pressure
ris-

es
slightly,
the
oil
pressure
switch
opens
and
thewarning
light

goes
out
.
Make
sure
the
oil
leve¡
is
correct
before
making

tests
.

1
.
Turra
ignition
switch
ora
.

"
Warning
light
ora
instrument
panel
must
light
up
.

2
.
Remove
connector
from
oil
pressure
switch
.

"
Warning
light
ora
instrument
panel
must
go
out
.

OIL
PAN

3
.
If
warning
light
does
not
light
when
ignition
is
ora,
re-

move
connector
from
oil
pressure
switch
anduse
a

jumper
wire
to
ground
connector
terminal
to
a
clean

metal
surface
.

NOTE
-

If
the
warning
light
comes
ora,
check
the
switch
as
de-
scríbed
in
the
nextstep
.
If
the
warning
light
does
not
come
ora,
thewiring
to
the
instrument
cluster
or
to
the

light
itself
isfaulty
.

4
.
To
test
switch,
connect
ara
ohmmeter
between
terminal

in
switch
body
and
ground
.
With
engine
off,
these

should
be
continuity
.
With
engine
running,
oil
pressure

should
opera
switch
and
there
should
beno
continuity

Replace
a
faulty
switch
.

WARNING
-

Keep
in
mind
that
low
oil
pressure
may
be
prevent-

ing
the
switch
from
tuming
the
light
out
.
If
the
light

remains
ora
while
the
engine
is
running,
check
the

oil
pressure
asdescribed
earlier
.
Do
not
drive
the
car
until
the
problem
is
corrected
.
Theengine
may
be
severely
damaged
.

Oil
pan,
removing
and
installing

(4-cylinder
engines)

1
.
Raise
car
arad
place
securely
ora
jackstands
.

2
.
Remove
splash
shíeld(s)
from
under
engine,
where
ap-

plicable
.

3
.
Drain
engine
oil
as
described
in
020
Maintenance
Pro-
gram
.

4
.
Disconnect
vacuum
hose
adapter
from
vacuum
brake

booster
at
rear
of
engine
compartment
.

5
.
Remove
oil
dipstick
guide
tube
mounting
nut
and
pull
guide
tube
from
oil
pan
.
See
Fig
.
2
.

2
.
Remove
cooling
duct
or
terminal
cover
from
rear
of
al-



2
.
Remove
air
cleaner
upper
section
with
mass
air
flow
ternator
.



sensor
.

3
.
Check
for
battery
voltage
between
ground
and
terminal



3
.
Remove
terminal
cover
from
rear
of
alternator
.
Discon
B+
at
back
of
alternator
.
Then
turn
ignition
on
and



nect
wiring
.
check
for
battery
voltage
between
terminal
D+
and
ground
.
See
Fig
.
3
.
lf
voltage
is
not
present
at
either



4
.
Remove
drive
belt
from
alternator
pulley
.
See
020
point,
check
wiring
for
faults
.



Maintenance
program
.

001
¡987
Fig
.
3
.



Terminal
B+
is
supplied
battery
voltage
directly
from
the
bat-
tery
.
Terminal
D+
is
supplied
battery
voltage
via
the
charge
warning
bulb
when
thekey
is
on
or
the
engine
is
running
.

4
.
lf
no
faults
are
foundup
to
thispoint,test
alternator
out-

put
using
a
load
tester
.

5
.
If
a
load
tester
is
not
available,
a
crude
output
test
can
be
done
by
running
engine
at
about
2000
rpmand
turn-
ing
on
electrical
loads
(fans,
lights
and
rear
window
de-
froster,
wipers)
.
With
al¡
accessories
on,
battery
voltage
should
be
above
12
.0
VDC
.

A
replacement
alternator
should
have
the
same
rating
as
the
original
.
Alternator
manufacturer
and
ampere
rating
are
normally
marked
on
the
alternator
housing
.
1
.
Disconnect
negative
(-)
battery
cable
.

CAUTION-

Prior
to
disconnecting
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
vi¡¡
.

BATTERY,
STARTER,
ALTERNATOR



121-
5

6
.
Remove
upper
and
lower
mounting
bolts
and
lift
out
al-
ternator
.
See
Fig
.
4
.

NOTE
-

If
reusing
drive
belt,
mark
direction
of
rotation
on
belt
before
removing
.

5
.
On
M44
engine
with
hydraulic
belt
tensioner
:
Remove
tensioner
idler
pulley
(upper
roller)
from
alternator

bracket
.

Fig
.
4
.



Alternator
mounting
bolts
(arrows)
.

O



u
J
S
v~~

U

I



1
i
n
-12
.22

Alternator,
removing
and
installing



7
.
Installation
is
reverse
of
removal
.
Install
drive
belt
as

(4-cylinder
engine)



described
in
020
Maintenance
Program
.

Tightening
Torques

"
D+
vire
to
alternator
(M6
nut)
.
...
.
.
.
7
Nm
(53
in-lb)

"
B+
wire
to
alternator
(M8
nut)
..
.
.
.
.
.
13
Nm
(10
ft-Ib)

"
Pulley
to
alternator
(M16
nut)
...
..
..
60
Nm
(44
ft-Ib)

ALTERNATOR
SERVICE

BOSCH
DME
MM
AND
M33
.1

COMPONENT
TESTS
AND
REPAIRS

Consult
Table
a
for
engine
application
information
for
the

Bosch
DME
3
.1
and
3
.3.1
systems
.

The
DME
3
.1
and
DME
3
.3
.1
systems
are
similar
in
opera-

tion,
with
knock
control
and
VANOS
operation
being
the
key

differences
.
DME
3
.1
engines
arenot
equipped
with
VANOS

or
knock
detectors,
while
the
DM
E3
.3
.1
system
is
.

CA
UTION-

Use
onty
a
digital
multimeter
when
testing
wiring
.
Use
of
an
analog
VOM
may
damage
the
engine
control
module
.

Fig
.
25
.
Mass
air
flow
sensor
.
Hot
wire
sensor
usedon
carswith
DME
Electrical
tests
of
the
main
and
fuel
pump
relays
and
the



3
.1
(1992
6-cylinder
models)
.

DME
engine
control
module
(ECM)
are
covered
earlier
in
this

section
.
Fuel
pump
tests
are
covered
in
160
Fuel
Tank
and



CAUTION-
Fuel
Pump
.
Use
only
a
digital
multimeter
when
checking
the
mass
air
flow
sensor
.
An
analog
meter
can
dam-
Mass
Air
Flow
Sensor



age
theair
flow
sensor
.

There
are
two
types
of
mass
air
flow
sensors
used
onthe



1
.
Disconnect
air
flow
sensor
from
air
cleaner
only
.
Leave

cars
covered
by
this
section
.
Testing
procedures
vary
de-



it
connected
to
duct
leading
to
intake
manifold
and

pending
on
type
installed
.
The
airflow
sensor
is
not
adjustable



leave
wiring
harness
connected
.

and
must
only
be
tested
with
a
digital
multimeter
.

Mass
Air
FlowSensor
Variants

"
1992
M50
engine

DME
M3
.1
.
.
.
.
...
..
mass
air
flow
sensor-hot
wire

"
1993-1995
M50
and
S50US

DMEM33
.1)
.
...
...
.
mass
air
flow
sensor-hot
film

Mass
air
flow
sensor
(hot
wire),

testing
and
replacing

When
the
engine
is
running,
a
current
is
used
to
heat
a
thin

wire
in
the
center
of
the
sensor
.
See
Fig
.
25
.
The
current
in
the

wire
is
regulated
to
maintain
a
temperature
of
100°C
more

than
the
air
passing
over
it
.
The
current
used
to
heat
the
wire

is
electronically
conneced
into
a
voltage
measurement
corre-

sponding
to
the
mass
of
intake
a¡
r
.

To
keep
the
wire
clean,
it
is
heated
to
a
temperature
of
about

1,000°C
(1,830°F)
for
one
second
.
This
"burn-off"
cycle
takes

place
automatically,
four
seconds
after
the
engine
is
tumed
off
.

lf
thehot
wire
breaks
or
if
there
is
no
output
from
the
air
flow

sensor,
the
ECM
automatically
switches
to
a
"limp-home"

mode
and
tucos
on
the
Check
Engine
light
.
The
engine
can

usually
be
started
and
driven
.
The
air
flow
sensor
has
no
inter-

nal
moving
parts
and
cannot
be
serviced
.

FUEL
INJECTION



130-
1
7

2
.
Start
engine
and
run
it
to
normal
operating
temperature
.

3
.
Rev
engine
toat
least
2,500
rpm,then
shut
it
off
.
Look

through
meter
at
hot
wire
.
After
approximately
four
sec-

onds
wire
should
glow
brightly
for
about
one
second
.

NOTE
-

If
the
wire
glowsas
specified,
then
the
airflow
meter
and
ECM
are
probably
operating
correctly
.
lf
the
wire
does
not
glow,
continue
testing
.

4
.
lf
the
wire
does
not
glow,
remove
air
flow
sensor
and

look
through
it
to
see
if
wire
is
broken
.
lf
wire
is
broken,

meter
will
have
to
be
replaced
.

5
.
Reinstall
air
flow
sensor
and
harness
connector
.
Peel

back
rubber
bootfrom
harness
connector
.
Working

from
rear
of
connector,
connect
digital
voltmeter
across

terminals
1
and
4
.
See
Fig
.
26
.

6
.
Start
and
rev
engine
toat
least
2,500
rpm,thenshut
it

off
.
After
about
4
seconds,
voltage
should
riseto
about

4
volts
for
about
one
second
.
lf
voltage
is
present,
but

wire
does
not
glow,
air
flow
sensor
is
faulty
and
should

be
replaced
.

7
.
lf
voltage
is
not
present
in
step
6,
turn
ignition
key
on

and
check
for
voltage
and
ground
at
sensor
.
There

should
beground
at
pin
4
.
There
should
be
positive
(+)

battery
voltage
at
pin
2
.

BOSCH
DME
M3
.1
AND
M32
.1
COMPONENT
TESTS
AND
REPAIRS

Fig
.
6
.



Preload
center
bearing
toward
front
4-6
mm
(arrow)
.

5331
5
.
Tightenthreadedsleeveondriveshafttopropertorque
.

6
.
Insta¡¡
heat
shield
and
heat
shield
crossmember
.

Tightening
Torques

"
Driveshaftcenter
mount
to
body
.
.
..
21
Nm
(16
ft-Ib)

"
Driveshaft
clamping
sleeve
.....
.
.
.
10
Nm
(89
in-lb)

"
Driveshaft
to
final
drive
flange

With
CV
joint
(M8)
............
...
32
Nm
(23
ft-Ib)

Wth
U-joint
(M10
ribbed
nut)
....
...
80
Nm
(59
ft-Ib)

With
U-joint
(M10
compressed
nut)
..
60
Nm
(44
ft-Ib)

"
Flex-disc
to
driveshaft
or
transmissionflange

M10
(8.8
grade)
.........
.
....
..
.
48
Nm
(35
ft-Ib)

M10
(10
.9
grade)
........
.
....
...
64
Nm
(47
ft-Ib)

M12
(8.8
grade)
........
.....
..
.
.
81
Nm
(60
ft-Ib)

M12
(10
.9
grade)
.
.
....
......
...
100
Nm
(74
ft-Ib)

M12
(10
.9
grade)
(M3
models)
..
.
.
.
115
Nm
(85
ft-Ib)

"
Transmission
crossmember

to
body
(M8)
.
....
...........
....
21
Nm
(16
ft-Ib)

NOTE-

Bolt
grade
is
markedon
the
bolt
head
.
When
replacing
bolts,
only
use
bolts
of
the
same
strength
and
hardnessas
the
originalsinstalled
.

Flex-disc,
replacing

The
flex-disc
between
the
front
section
of
the
driveshaft
and

theoutputflange
of
the
transmission
should
be
checked
for

cracks,
tears,
missing
pieces,
or
distortion
.
Check
for
worn
bolt
hole
bores
in
theflange
.

1
.
Remove
driveshaft
as
described
in
Driveshaft,
remov-
ing
.

NOTE-

¡t
is
possible
to
only
partially
remove
the
driveshaft,
leaving
it
connected
to
the
final
drive
.
The
driveshaft
canbe
tilted
down
in
thecenter
and
slidoff
the
trans-
mission
flange
once
the
clamping
sleeve
is
loosened
and
the
center
bearing
bracket
is
unbolted
.
Suspend
the
driveshaft
using
stiff
wire
in
as
close
to
the
installed
position
as
possible
.
If
the
driveshaft
hangs
unsupport-
ed,
the
rear
universal
joint
may
be
damaged
.

2
.
Unbolt
flex-dísc
from
driveshaft
.

DRIVESHAFT
260-
5

7
.
Install
exhaust
system
.
See
180
Exhaust
System
.

Connect
wiring
harness
to
oxygen
sensors
.



NOTE-

Removaland
installation
of
the
boltsmaybe
made
eas-
8
.
Road
test
vehicle
to
check
for
noiseor
vibration
.



ier
by
placing
a
large
hose
clamp
around
the
flex-disc,
and
tightening
the
clamp
slightlyto
compress
the
cou

WARNING
-



pling
.

"
Do
not
reuse
self-locking
nuts
.
These
nuts
aredesigned
to
beused
only
once
.



3
.
Insta¡¡
new
flex-disc
using
new
self-locking
nuts
.
Mold-

"
Avóid
stressing
the
flex-disc
when
torquing
the



ed
arrows
on
coupling
should
face
flange
arms
.
See

bolts
Do
this



holding
the
bolts



Fig
.
7
.
steady
and
.



uy
turning
the
nuts
on
theflange
side
.

5
:132

Fig
.
7
.



When
attaching
flex-disc,
molded
arrows
must
point
toward

flange
arms
.

DRIVESHAFT
SERVICE

340-
1
2
BRAKES

ABS
is
self-tested
by
the
ABS
diagnostic
unit
each
time
the
car
is
started
.
Once
the
test
is
complete,
the
ABS
dashboard
light
tucos
off
.
If
the
light
remains
lit
or
comes
on
at
any
time
during
driving,
a
system
fault
has
occurred
and
ABS
is
elec-
tronically
disabled
.
The
conventional
braking
systemremains
fully
functioning
.

ABS
Inspection

A
visual
inspection
of
the
ABS
may
help
to
locate
system
faults
.
If
no
visual
faults
can
befound
and
the
ABS
light
re-
mains
on,
have
the
system
diagnosedbyan
authorized
BMW
dealer
.

Carefully
inspect
the
entire
ABS
wiring
harness,
particularly

the
pulse
sensorharnesses
and
connectors
near
each
wheel
.

Look
for
chafing
or
damage
due
to
incorrectly
routed
wires
.

Carefully
remove
the
wheelspeed
sensors
.
Clean
the
sen-



Fig
.
18
.
Front
ABS
pulse
sensor
mounting
bolt
(arrow)
.
sor
tips
.
Inspect
the
toothed
wheel
on
thewheel
hub
.
Check
for
missing,
clogged
or
corroded
teeth,
or
other
damage
that
could
alter
the
clearance
between
the
sensor
tip
and
the
toothed
wheel
.

NOTE-

If
a
toothed
ring
is
damaged,
the
entire
wheel
hub
mustbe
reptaced
.
See
310
Front
Suspension
or330
Rear
Suspension
.

ABS
wheel
speed
sensors,
replacing

1
.
Raise
applicable
end
of
car
.

WARNING
-

Make
sure
thecar
is
firmly
supportedon
jack
stands
designed
for
the
purpose
.
Place
the
jack
stands
be-
neath
a
structural
chassis
point
Do
not
place
jack
stands
under
suspension
parts
.

2
.
Unscrew
wheelspeed
sensor
mounting
bolt
.
Remove
sensor
from
its
housing
.
See
Fig
.
18
.
Remove
harnessfrom
retaining
mounts
.

3
.
Front
ABS
sensor
:
Working
in
front
wheel
housing,
dis-
connect
and
remove
sensor
.
See
Fig
.
19
.

4
.
Rear
ABS
sensor
:
Working
in
rear
wheel
housing,
dis-
connect
andremove
sensor
.

5
.
During
installation,
apply
thin
coat
of
Molykote
0
Long-
term
2
or
an
equivalent
grease
to
pulse
sensor
and
housing
.

ANTILOCK
BRAKE
SYSTEM
(ABS)

0012122
Fig
.
19
.
Front
ABS
wheel
speed
electrical
connector
(arrow)
in
wheel
well
.

6
.
Installation
is
reverse
of
removal
.

411-2
DOORS

4
.
Remove
retainer
clip
(early
models
only)
from
doorcheck

pin
onbody
pillar
.
Drive
out
door
check
pin
.
See
Fig
.
3
.



Door
Adjustment

"
Door
gap

to
fender/rear
door
.........
approx
.
5
mm
(0
.189
in)

"
Permíssible
deviation
from
parallel
.
.0
.5
mm
(0
.020
in)

0011651

Fig
.
3
.



Door
check
pin
being
removed
.
Note
retainer
clip
(A)
usedon

early
models
.

5
.
Remove
doorby
lifting
up
off
lowerhinge
halves
.

CAUTION-

Be
careful
not
to
damage
door
or
other
painted
body
surfaces
.
Make
sure
no
load
is
placedon

wiring
harness
.

6
.
Installation
is
reverse
of
removal
.
Keep
in
mind
the
fol-

lowing
:

"
Align
doorso
that
panel
gaps
are
equal
on
either
side,

as
described
later
.
If
necessary,
adjust
door
hinges
as

described
later
.

"
Adjust
door
striker
so
that
trailing
edge
of
front
door
is

slightly
higher
(1
mm)
than
leading
edge
of
rear
door
.

See
515
Central
Locking
and
Anti-Theft
.

"
Repair
any
paint
damage
and
paínt
any
exposed
met-

al
.

CAUTION-
.

"In
2-door
models,
removing
and
installing
the
door
may
upset
the
adjustment
and
alignment
of
the
window
.
Window
adjustment,
as
described
in
512DoorWindows,
must
be
carried
out
ater
installation
to
prevent
damaging
the
glass
.

"
If
battery
power
is
lost
or
the
battery
has
been
disconnected,
the
windows
must
be
re-initialized
.
Both
one
touch
upldown
and
pinch-protection
will
be
inactive
until
windows
are
re-initialized
.
See
512
Door
Windows
.

DOOR
CHECK,
REPLACING

Door
check,replacing

WARNING
-

Some
1997
and
all
1998
cars
are
fitted
with
side-im-

pact
airbags
in
the
front
doors
.
When
servicing
doors

on
cars
with
front
side-impact
airbags,
always
dis-

connect
the
negative
(-)
battery
terminal
.
See
721

Al
rbag
System
(SRS)
for
cautions
and
procedures
relating
to
the
airbag
system
.

1
.
Closedoor
window
completely
.

2
.
If
working
on
front
door
with
side-impact
airbag,
discon-

nect
negative
(-)
battery
cable
.,

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery

disconnection
cautions
gíven
at
the
front
of
this

manual
on
page
viii
.

3
.
Remove
interior
door
panel
and
vapor
barrier
as
de-

scribed
later
.

4
.
Where
applicable,
remove
side-impact
airbag
from
door
.
See
721
Airbag
System
(SRS)
.

NOTE-

In
some
models
covered
inthis
manual,
ít
is
not
essen-

tial
to
remove
the
side-ímpact
airbag
to
access
internal

door
components
.
However,
the
procedure
is
recom-

mended
for
safety
reasons
.

5
.
Remove
retainer
clip
(early
models
only)
from
door

check
pin
on
body
pillar
.
Drive
out
door
check
pin
.
Refer

to
Fig
.
3
.

6
.
Remove
bolts
and
rubber
cover
fromdoor
check
lock-
plate
ondoor
.

7
.
Remove
door
check
from
inside
door
.

8
.
Installation
is
reverse
of
removal
.

"
Lubricate
door
check
before
installing
.

"
Use
new
mounting
bolts
when
reinstalling
the
side-im-

pact
airbag
to
thedoor(where
applicable)
.

"
If
battery
was
disconnected,
re-initialize
window
regu-

lator
motors
as
described
in
512
Door
Windows
.

612
Switches
and
Electrical
Accessories

GENERAL
.
.
.
.
.
.
.
.
.
...
.
.
.
.
.
...
.
......
.612-1



Headlight
switch,
replacing



..
.
...
.
.
.
.
.
.
.
.
.
612-5

Foglight
switch,
replacing
....
.
.
.
.
.
.
.
.
.
.
.
.
.
612-5
INTERIOR
SWITCHES
.
.
...
.
.
.
.
.
.
.
.....
612-1



Hazard
warning
switch,
replacing
.
.
.
.
.
.
.
.
.
.612-5
Turn
signal
switch
and
wiper
switch,



Powerwindow
switch,
replacing
.
.
.
...
.
.
.
.
.
612-5
replacing
.
.
.
.
.
.
.
...
.
.
.
.....
.
....
.
.
.
.
612-1



Outside
mirrorswitch,
replacing
.
.
.
.
.....
.
.
.612-6
Ignition
Switch
Assembly
.
.
.
.
.
.
.
.
....
.
...
612-3

Ignition
electrical
switch,
replacing
.
...
.
....
612-3



INTERIOR
LIGHTS
.
.
................
.
..
612-6

Ignition
lock
cylinder,
replacing
.
.
.
.
.....
.
..
612-4



Dome
light,
rear
map
lights,
trunk
light,

Headlight
and
Foglight
Switch
Assembly
.
.
.
.
612-5



replacing
bulbs
.
......
.
.
.
.
.
.
.
.
.
.....
.
.612-7

GENERAL



Turn
signal
switch
and
wiper
switch,

replacing
Thissection
covers
replacement
of
interior
switches
and
accessories
.



The
procedures
for
removing
the
turn
signal
stalk
switch
and
the
wiper
system
stalk
switchare
similar
.
When
working
on
electrical
switches,
always
disconnect
the
negative
(-)
cable
from
the
battery
and
insulate
the
cable
end
to
prevent
accidental
re-connection
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.

WARNING
-

The
cars
covered
by
this
manual
are
equipped
with
a
Supplemental
Restraint
System
(SRS)
that
auto-'
matically
deploys
one
or
more
airbags
.
Each
airbag
unit
houses
an
explosive
powerful
charge
.
Any
work
involving
the
SRS
system
should
only
be
per-
formed
byan
authorized
BMW
dealer
.
Making
re-
pairs
without
the
proper
knowledge
and
special
test
equipment
may
cause
serious
personal
injury
.
See
721
Airbag
System
(SRS)

3
.
With
front
wheels
pointed
straight
ahead,
remove
steer-
"
Testing
and
replacement
information
for
the
oil
ores-



¡ng
wheel
.
See
320
Steering
and
Wheel
Alignment
.
sure
switch
is
covered
in
119
Lubrication
System
.

NOTE-

"
Wirfng
diagramscan
be
found
in
Electrical
Wiring
Diagrams
.

"
Fuse,
relay
and
electrical
component
locations
can
be
found
in
610
Electrical
Component
Locations
.

"
Replacement
information
for
thetransmission
gear
position/neutral
safety
switch
is
covered
in
250
Gear-
shift
Unkage
.

INTERIOR
SWITCHES

NOTE
-

To
preventmarring
interior
trim,
wrap
the
tips
of
screw-
drivers
and
pliers
with
tape
beforeprying
out
switches
or
electrical
accessories
.

SWITCHES
AND
ELECTRICAL
ACCESSORIES



612-1

1
.
Disconnect
negative
(-)
cable
from
battery
and
cover
terminal
with
insulating
material
.

2
.
Remove
airbag
unit
from
steering
wheel
.
See
721
Air-
bag
System
(SRS)
.
Store
airbag
unit
in
a
safe
placew¡th
pad
facing
up
.

NOTE
-

To
helo
with
reassembly,
mark
steering
wheel
and
col-
umn
before
disassembly
.

4
.
Remove
trim
panel
from
lower
left
side
of
instrument
panel
.
See513
Interior
Trim
.

INTERIOR
SWITCHES

721-2



AIRBAG
SYSTEM
(SRS)

Fig
.
1
.



Airbag
system
components
.

AIRBAG
SENSORSAND
ELECTRONICS

CA
UTION-

"
If
an
airbag
is
activated,
the
following
compo-
nents
must
be
replaced
:
Airbag
with
contact
ring
;
-Pyrotechnic
seat
belt
tensioners
(if
fitted)
;
-SRS
Control
module
;
-Impact
sensors
;
All
airbags
which
did
not
deploy
.

"
Consult
your
BMW
dealer
for
parts
and
service
information
.

TheE36
airbag
system
consists
of
the
following
compo-

nents
:
crash
sensors
(in
earlycars,
through
1993),
an
elec-

tronic
control/monitoring
module
(with
integrated
crash

sensor
in
ZAE
systems),
an
indicator
light
in
the
instrument
panel,
and
inflatable
airbags
equipped
with
gas
generators
in

the
steering
wheel
and
in
the
passenger
side
of
the
instrument

panel
(ZAE
systems)
.

Some
1997
and
al¡
1998
carsalso
have
side-impact
airbags

in
the
front
doors
.

AIRBAG
SENSORS
AND
ELECTRONICS

1.
Crash
sensors
(through
1993)



wheel
2
.



SRS
control
module
in
front
of



5
.



Side-impact
airbags
(1997/98)
glove
compartment
(through



6
.
ZAE
control
module
under
rear
1993)



seat
(from
1994)
3
.



Passenger
side
airbag
unit
in



7
.
Side-impact
airbag
crash
sensors
dashboard
(ZAE
system)



in
door
silis
(1997/98)
4
.



Driver
side
airbag
unitin
steering



8
.



Knee
bolsters

In
addition
to
the
airbags,
the
vehicles
are
equipped
wíth

knee
bolsters
for
extra
protection
.

SRS
Warning
Light
and
Fault
Display

The
airbag
system
utilizes
a
self-diagnostic
control
module

to
detect
and
store
system
faults
.
If
a
fault
is
detected,
the

SRS
indicator
in
the
instrument
cluster
comes
on
and
stays

on
.

When
the
ignition
key
is
tumed
on,
the
indicator
light
will
illu-

minate
for
approximately
4-6
seconds
.
The
illuminated
light

indicates
the
self-testof
the
electronic
control/monitoring

module,
the
ignítors
and
crash-sensorcircuits,
and
the
system

wiring
.
The
airbag
system
should
be
inspected
byan
autho-

rized
BMW
dealer
if
the
indicator
light
does
not
come
on,
ifit

does
not
go
out
in
approximately
4-6
seconds
after
switching

onthe
ignition,
or
if
the
light
comes
on
during
driving
.
If
the

system
has
detected
a
fault,
the
light
will
come
on
and
stay
on
.

721-
6



AIRBAG
SYSTEM
(SRS)

5
.
Carefully
lift
airbag
unit
off
steering
wheel
and
discon-



6
.
Installation
is
reverse
of
removal
.
Tighten
right
side
nect
orange
harness
connector
from
rear
of
airbag
unit
.



screw
on
airbag
first
(as
viewedfrom
driver's
seat),

See
Fig
.
10
.



then
left
side
screw
.

NOTE-



NOTE-

In
some
models,
theairbag
electrical
connection
to
the



If
there
is
no
electrical
harness
connector
between
the
steering
wheel
isvia
aplug
in
back
of
the
airbag
unit
.



airbag
and
the
steering
wheel,
be
sure
to
fit
the
push
There
is
no
wire
harness
to
disconnect
.



in
electrical
plug
in
back
of
the
airbag
finto
the
proper
re-
ceptacle
in
the
steering
wheel
.

Fig
.
10
.
Driver
sideairbag
unit
harness
connector
(arrow)
.

AIRBAGS

WARNING
-

"
Store
the
removed
airbag
unit
with
the
horn
pad
facing
up
.
If
stored
facing
down,
accidental
de-
ployment
couldpropel
it
violently
into
the
air,
causing
injury
.

"
Once
an
airbag
is
removed,
the
car
must
not
be
driven
.

"
Do
not
connect
the
battery
with
the
airbag
dis-
connected
.
A
fault
code
will
be
stored,
setting
off
the
SRS
warning
light
.
Special
tools
are
needed
to
reset
the
fault
memory
.

"
Special
instructions
apply
when
installing
an
air-
bag
equipped
steering
wheel
.
See
320
Steering
and
Wheel
Alignment
.

"
Once
the
airbag
unit
is
installnd
and
all
other
ser-vice
procedureshave
been
completed,
start
the
engíne
and
check
that
the
SRS
warning
light
goes
out
.
If
the
warning
light
stays
on,
the
SRS
system
will
not
function
as
designed
.
Have
the
system
diagnosed
and
repaired
by
an
authorized
BMW
dealer
.

0013184

Tightening
Torque

"
Airbag
unitto
steering
wheel
........
8
Nm
(71
in-lb)

Passenger
side
airbag,

removing
and
installing

1
.
Disconnect
negative
(-)
cable
from
battery
and
cover
negative
terminal
with
insulating
material
.

2
.
Remove
glove
compartment
.
See
513
Interior
Trim
.

3
.
Lift
cover
from
topof
passenger
sideairbag
on
dash-
board
.
See
Fig
.
11
.

0013108
Fig
.
11
.
After
removing
glove
compartment,
lift
out
passenger
side
air-
bag
cover
.
Note
airbag
mounting
bolts
(A)
and
airbag
electri-
cal
connector
(B)
.

4
.
Remove
passenger
sideairbag
mounting
bolts
.
Dis-
connect
electrical
harness
connector
from
rear
of
air-
bag
unit
and
remove
airbag
.

5
.
Installation
is
reverse
of
removal
.
Make
sure
wiring
har-
ness
is
not
pínched
when
installing
airbag
unit
in
dash-board
.