
640-8
HEATING
AND
AIR
CONDITIONING
0012649
Fig
.
22
.
A/
C
control
head
faceplate
screwson
rotary
knob
version
(ar-
rows)
.
Once
screws
are
removed,
faceplate
must
be
un-
clipped
from
control
head
.
Fig
.
23
.
Push
control
panel
out
ofcenter
console
.
4
.
Remove
harness
connectors
.
Unfasten
heater
duct
control
flex-shaft
on
right
side
of
control
head
by
squeezing
retaining
tab
.
PA
shaftout
of
coupling
in
control
head
and
remove
head
.
5
.
Installation
is
reverseof
removal
.
HEATER
AND
CONTROLS
0012650
Heater
and
A/C
control
head,
removing
and
installing(digital-display)
1
.
Remove
Multi-Information
Display
(MID)
module
from
center
of
dash
.
See
620
Instruments
.
2
.
Reach
into
dash
through
MID
opening
and
push
A/C
control
head
outwards
.
3
.
Disconnect
harness
connector
and
remove
control
head
.
4
.
Installation
is
reverse
of
removal
Heater
andA/C
control
module,
removing
and
installing
(rotary-knob)
1
.
Remove
Multi-Information
Display
(MID)
module
from
center
of
dash
.
See
620
Instruments
.
2
.
Remove
center
console
.
See
513
Interior
Trim
.
3
.
Disconnect
wiring
harness
connectors
to
A/C
control
module
in
center
console
and
removemodule
.
See
Fig
.
24
.
0013007
Fig
.
24
.
A/
C
control
module
(A)
in
center
console
.
Arrows
point
to
electrical
harness
connectors
at
A/Cmodule
.
Heater
and
A/C
control
module,
removing
and
installing(digital-display)
TheA/C
control
module
for
cars
with
the
digital
display
is
mounted
on
the
back
of
the
control
head
.
See
Fig
.
25
.
1
.
Remove
control
head
as
described
earlier
and
place
onan
anti-static
mat
.

2
.
Using
special
hex
key,
turn
radio
mountingscrews
counterclockwise
to
loosen
.
See
Fig
.
4
.
0011845
Fig
.
4
.
Use
special
hexkey
or
Torx
driver
to
loosen/tighten
radio
mountingscrews
.
3
.
Pul¡
radio
out
of
instrument
panel
opening
.
4
.
Remove
connector(s)
from
rearof
radio
.
See
Fig
.
5
.
Fig
.
5
.
Radio
connector
being
removed
.
5
.
Installation
is
reverse
of
removal
.
0011846
Left
footweil
speaker,
removing
and
installing
Fig
.
6
.
Hood
release
lever
retaining
screw
(arrow)
.
RADIO
650-
3
1
.
Remove
screw
from
center
of
hood
latch
release
lever
.
Remove
lever
.
See
Fig
.
6
.
0012578
2
.
Rotate
plastic
trim
panel
retainer
1
/4
turn
.
Pul¡
off
door
sea¡
from
edge
of
speaker
cover
and
pull
speaker
trim
panel
back
toward
rear
of
car
.
See
Fig
.
7
.
0012579
Fig
.
7
.
Rotate
plastic
retainer
(black
arrow)
andremove
panel
in
di-
rection
shown
(white
arrows)
.
RADIO
AND
SPEAKER
SERVICE

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
.

GENERAL
This
section
contains
wiring
diagrams
for
1992
through
1998
BMW
3
Series
models
.
WARNING
-
On
cars
equipped
with
airbags,
special
precautions
apply
to
any
electrical
testing
or
repair
.
The
airbag
unit
is
an
explosive
device
and
must
be
handled
with
exterme
care
.
Before
starting
any
work
onan
airbag
equipped
car,
refer
to
the
warnings
and
cau-
tions
in
720
Seatbelts
and
721
Airbag
Systems
(SRS)
.
NOTE-
The
"
gear
position/neutral
safetyswitch
is
also
some-
timesreferred
to
as
the
automatic
transmission
range
switch
.
"
The
EWS
11
system
is
also
sometimes
referred
to
as
the
Driveaway
Protection
System
or
the
electronic
im-
mobilization
system
.
ELECTRICAL
WIRING
DIAGRAMS
ELE-1
Electrical
Wiring
Diagrams
GENERAL
.
.
.
.
.
.
.
.
.
................
.
.
.
ELE-1
Horns
.....
.
.....
.
.
.
....
.
.
.
.
.
...
.
.
ELE-153
Instrument
Panel
.
.
.
.
.
.
..............
ELE-165
ELECTRICAL
WIRING
DIAGRAMS
...
.
.
.
ELE-2
Interior
Lights/Illumination
.............
ELE-211
ABS
..............
.
.
.
.....
.
.....
ELE-117
Lumbar
Control
.
....................
ELE-247
ABS/AST
.............
.
.
.
...
.
.
.
.....
ELE-120
On-Board
Computer
..................
ELE-173
Airbag
(Supplemental
Restraint
System)
..
ELE-140
Park
Ventilation
.
.
.
...........
.
...
.
..
ELE-139
Air
Conditioning
and
Heating
.
.
.
.
.
.
.....
ELE-129
Power
Distribution
......
.
...
.
.
.
.
.
.
.
...
.
ELE-2
Anti-Theft
(Alpine)
..........
.
.
.
...
.
...
ELE-144
Power
Door
Locks
.
.
......
.
.
.
.
.
.
.
.
.
..
ELE-226
Anti-Theft
(EWS
II)
.
........
.
.
.
...
.
...
ELE-150
Power
Mirrors
...
.
.
.
......
.
.
.
.
.
.
.
.
.
..
ELE-241
Body
Computer
Module
.....
.
.....
.
...
ELE-176
Power
Seats
......
.
......
.
.
.
...
.
.
.
..
ELE-243
Charging
System
.
.
................
.
.
.
ELE-67
Power
Sunroof
.
.
.
.
.
.
.
...............
ELE-248
Convertible
Top
.
.
.
.
................
.
.
ELE-253
Power
Windows
.
.
.
.
.
.
.....
.
.........
ELE-231
Cruise
Control
..
.
.
.
...........
.
....
.
.
ELE-112
Radio/Cassette/CD/Speakers
..........
ELE-255
Data
Link
Connector
................
.
.
.
ELE-86
Rear
Window
Defogger
...............
ELE-160
Engine
Cooling
.......
.
.......
.
....
.
.
.
ELE-94
Shift
Interlock
.
.
.
.
.
.
.
.
...............
ELE-110
Engine
Management
...
.
.......
.
....
.
.
.
ELE-70
Starting
....
.
.
.
.
.
...
.
................
ELE-63
Exterior
Lights
........
.
.
.
.
.
.
.
.
.
......
ELE-194
Transmission
Electronics
.
..............
ELE-96
Ground
Distribution
....
.
.
.
.
.
.
.
.
.
.......
ELE-35
Warning
System
:
Chimes
.............
ELE-178
Headlights/Foglights
...
.
.
.
.
.
.
.
.
.
......
ELE-180
Wiper/Washer
.
.....
.
...............
ELE-155
Heated
Seats
........
.
.
.
.
.
.
.
.
.
......
ELE-245
ELECTRICAL
COMPONENT
LOCATIONS
Relayand
fuse
positions,
ground
locations
...........
.
.
.
.
.
.
.
.
.
................
seeRepair
Group
610
CAUTION-
Always
switchthe
ignition
off
and
disconnect
the
negative
(-)
battery
cablebefore
removing
any
electrical
components
.
"
Prior
to
disconnecting
the
battery,
read
the
bat-tery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.
"
Connect
and
disconnect
ignition
system
wires,
multiple
connectors
and
ignition
test
equipment
leads
only
while
ignition
is
switched
off
.
-Always
switch
a
test
meter
to
the
appropiate
func-
tion
and
range
before
making
test
connections
.
"
All-Season
Traction
(AST)
is
also
referred
to
as
ASC
or
ASC+T
.
GENERAL

CAL
WIRING
DIAGF
Power
Di
;
1992-93
~~~A
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(LATE
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64773(USA)

EKE
Power
1992-
VIO
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64776

CALWIRING
DIAGF
Power
Di
:
1992-93
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(DIAGRAMSOF7)
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CONTROL
RECIRCULATION
MODULE
FUNCTION
CLUSTER
LIGHT
CHARGING
LEFTPAPK
FRONT
DOME/
LEFT
POW
PANEL
CONTROLMODULE
CLOCK
SWITCH
SOCKET
LIGHTRELAV
MAP
LIGHT
WINDON
ASSEMBLY
MODULE
G203
1
FROMFRONTPOWER
RED
RED/WHT
DISTRIBUTION
BOX
(DIAGRAM
1
82OF7)
RED/WIT
3
TFUSEF33
FRONT
ODAORAM
R
______
__________________-
I
POWER
¢
1
2
2
416
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FUSE
FUSE
FUSE
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FUSEFUSE
(DISTRIBUTION
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F38
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II
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TRUNK
RIGHTREAR
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TELEPHONE
COMPARTMENT
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INTERIOR
TRANSCEIVER
LIGHT
LIGHTLIGHT
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RASH
CONTROL
MODULE
CANADAUSA
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ABSPUMP
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LOCKING
RELAY
WASHER
SWITCH
LICENSEPLATE
MOTORRELAV
MODULE
RELAY
MODULE
MODULE
(USA)
LIGHTRELAV
(CANADA)
64784

ELE
rower
1992-
FROMFRONTPOWEn
REO
DISTRIBUTION
BOX
E
(DIAGRAM
1
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FROM
FRONT
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RED
DISTRIBUTION
BOX
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20
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DISTRIBUTION
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FOOLIGHTCLEANING
No
DULE(SPA)
NOTUSED
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I
(CANADA)
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D
FROMFRONTFOG
RED/YEL
FROMLOWBEAM
YEL
PARK
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LIGHTRELAY
M
VENTILATION
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-
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DISTRIBUTION
BOX
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FOG
LIGHT
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LEFT
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CHECKCONTROL
RIGHTLOWBLOWER
BLOWER
PARK
HEATING
CLUSTER
BEAM
HEADLIGHT
MODULE
BEAM
HEADLIGHT
RELAYRELAY
VENTILATION
CANADA
RELAY
BOX
FROMFRONTFOG
YELIBLK
LIGHTRELAV
V
(DIAGRAM
l
&2
OF
7)
FROMFRONTP0
ER
REDDISTRIBUTIONBOX
H
(DIAGRAM
1
&2
OF
7)
FROMFRONTPOWER
RED
FROMHIGHBEAM
REDIWHT
DISTRIBUTION
BOX
LIGHTRELAY
K
(DIAGflAMi&20F7)
,
---------
------
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--
(DIAGR=M1&20)=7)~
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21
17
13
1
FRONTPOWER
I
DISTRIBUTIONBOX
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FUSE
FUSE
FUSE
FUSE
FUSE
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F41
F39
F17
F30
F28
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HIGHS
PEED
COMPRESSOR
REARFOG
RIG
THIGH
LEFTHIGH
RELAY
CONTROL
LIGHTSWITCH
BEAM
LIGHT
BEAM
LIGHT64849
RELAY