switch BMW 318i 1997 E36 Workshop Manual

612-6



SWITCHES
AND
ELECTRICAL
ACCESSORIES

Fig
.
13
.
Removing
window
switch
from
console
.

Outside
mirror
switch,
replacing

0012561

1
.
Carefully
pry
mirror
switch
from
arm
rest
.
See
Fig
.
14
.

Fig
.
14
.
Pry
outside
mirror
switch
from
door
arm
rest
.

2
.
Disconnectharness
connector
from
switch
.

3
.
Installation
is
reverseof
removal
.

INTERIOR
LIGHTS

0013168

INTERIOR
LIGHTS

Dome
light,
rear
map
lights,
trunk
light,

replacing
bulbs

1
.
Pry
dome
light
out
from
left
side
.
See
Fig
.
14
.

Fig
.
15
.
Dome
light
assembly
being
removed
.

2
.
Release
locking
blade
and
swing
back
reflector
.
Spread

apart
contact
blades
toreplace
buib
.

3
.
Pry
rear
map
light
out
with
small
screwdriver,
remove

reflector
and
replace
bulb
.
See
Fig
.
16
.

Fig
.
16
.
Rear
interior
light
assembly
shown
removed
.

0011855

4
.
Use
screwdriver
to
carefully
pry
off
trunk
light
lens
and
replace
bulb
.
See
Fig
.
17
.

Fig
.
17
.
Trunk
light
lens
being
removed
.

Interior
Light
Bulb
Wattages

"
Dome
light
..
..
.
..
..
..................
10
watts

"
Rear
map
light
.
.
.
.
.
....................
5
watts

"
Trunk
light
...
..
.
..
....................
10
watts

SWITCHES
AND
ELECTRICAL
ACCESSORIES



612-7

uulio56

INTERIOR
LIGHTS

640-10



HEATING
AND
AIR
CONDITIONING

i

El
Radio

Antenna

Rear



.
,



si,-
Left
side



I
d

1
.
Rear
vents
2
.
Fresh
air
3
.
Face-level
vents
4
.
Recirculation
5
.
Footwell
vents
0013017

Fig
.
28
.
Location
oflate
production
air
distribution
motors
in
heater
box(shown
in
rear,
side
and
top
views)
.

Heater
andA/C
air
distribution
motor,

replacing
(rotary-knob)

1
.
Toaccess
left
side
motors
(dash
vent
mixing
or
recircu-

lation
flap),
remove
lower
dash
panel
and
knee
bolster

on
driver
side
.
See
513
Interior
Trim
.

2
.
To
access
right
side
motor
(fresh
air
flap),
remove
glove

compartment
.
See513
Interior
Trim
.

3
.
Each
motor
can
be
removed
after
its
electrical
wiring

harness
connector
has
been
removed
.
Squeeze
plastic

clip
to
release
motor
.
See
Fig
.
29
.

Fig
.
29
.
A/
C
air
distribution
motor
plastic
retaíning
clip
(arrow)
.
Re-
lease
clip
and
tilt
motor
out
of
housing
.

Rear
Window
Defogger

0011877

The
rear
window
defogger
switch
is
integrated
with
the
heating
andA/C
control
head
.

HEATER
AND
CONTROLS

Fig
.
30
.
Wiring
diagram
of
rear
window
defogger
and
radio
antenna
.

Rear
Window
Blower
(Convertible
Models)

A
blower
fan,
fitted
into
the
rear
seatback,
defogs
therear

window
.
It
will
only
operate
with
the
engine
nunning
and
the

top
raised
.
A
microswitch
behindthe
rear
seats
provides
the

signal
that
thetop
is
raised
.

To
access
the
blower
fan
motor,
it
is
necessary
to
remove

four
screwsfrom
the
center
seat
back
.
Remove
the
wiring
har-

ness
connector
and
motor
mounting
boits,
then
remove
motor

by
pulling
it
down
and
forward
.
See
Fig
.
31
.

ri

Suppressor
filter

1
0013005

Fig
.
31
.
Rear
window
blower
in
center
of
rear
seat
back
(arrow)
.

The
electric
rear
window
defogger
is
integrated
with
the
ra-

dio
antenna
.
See
Fig
.
30
.



y



/f



0013014

To
access
the
rear
window
blower
relay,
remove
the
glove
compariment
.
See
Fig
.
32
.

Fig
.
32
.
Rear
window
blower
relay
located
in
frontof
glove
compart-
ment
(arrow)
.

AIR
CONDITIONING

Thissection
covers
removal
and
installation
of
air
condition-

ing
refrigerant
components
.
A/C
testing
and
diagnosis,
refrig-

erantdischarge,
evacuatíon
and
recharge
are
not
covered

here
.

The
subassemblies
and
lines
of
the
air
conditionerare
filled

with
either
refrigerant
R12
(1992
cars)
or
R-134a
(1993
and

later
cars)
.
The
major
components
of
the
A/Csystem
are

shown
in
Fig
.
33
.

A/CSystem
Warnings
and
Cautions

WARNING
-

"
Always
be
careful
that
refrigerant
does
not
come
in
contact
with
your
skin
.
Always
wearhand
andeye
protection
(gloves
and
goggles)
when
work-

ing
around
the
AIC
system
.
If
refrigerant
does
come
in
contact
with
your
skin
oreyes
:
-Do
not
rub
skin
oreyes
;

-Immediately
flush
skin
oreyes
withcool
water
for
15
minutes
;
-Rush
to
a
doctor
orhospital
;
-Do
not
attempt
to
treat
yourself
.

"
Work
in
a
wefl
ventilated
area
.
Avoid
breathing
re-
frigerant
vapors
.
Exposure
may
irrítate
eyes,

nose,
and
throat
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.

"
Do
not
expose
any
component
of
the
AIC
system
to
high
temperatures
(Above
80°Cl176°F)or

open
flames
.
Excessive
heat
will
cause
a
pres-

sureincrease
whichcould
burst
the
system
.

HEATING
AND
AIR
CONDITIONING



640-
1
1

0013015

WARNING
-

"
Keep
refrigerant
away
from
open
llames
.
Poison-
ous
gas
will
be
produced
if
it
bums
.
Do
not
smoke
near
refrigerant
gases
for
the
same
reason
.

"
The
AICsystem
is
filled
with
refrigerant
gas
which
is
under
pressure
.
Pressurized
refrigerant
in
the
presenceof
oxygen
may
forma
combusti-
ble
mixture
.
Never
introduce
compressed
air
finto
any
refrigerant
container
(full
or
empty),
capped
off
AIC
component,
or
piece
of
service
equip-
ment
.

"
Refrígerant
gases
are
heavier
than
air,
displace
oxygen
and
may
cause
suffocation
in
areas
of
poor
círculation,
for
example
under
a
car
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.

"
State
and
local
governments
may
have
additional
requirements
regarding
air
conditioning
servic-
ing
.
Alwayscomply
with
state
and
local
laws
.

"
Electric
welding
near
refrigerant
hoses
causes
R-134a
to
decompose
.
Discharge
system
before
welding
.

CA
UTION
-

-As
of
January
1,
1992,
any
person
who
services
a
motor
vehicle
air
conditioner
must,
by
law,
be
properly
trained
and
certified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-approved
recycling
course
to
be
certified
.

"
It
is
recommended
that
al¡
system
refrigerant
AIC
refrigerant
be
left
to
an
authorized
BMW
dealer
or
other
qualified
AIC
service
facility
.

"
Do
not
top
off
a
partially
charged
refrigerant
sys-
tem
.
Dischargesystem,evacuate
and
then
re-
charge
system
.

"
R-134a
and
R-12
refrigerants
and
refrigerant
oils
and
system
components,
including
hoses
and
sealing
O-rings,
are
NOT
compatible
.
Compo-
nent
damage
andlor
system
contamination
will

result
.

"
The
mixture
of
refrigerant
oil
(PAG
oil)
and
refrig-
erant
R-134a
attacks
some
metals
and
alloys
(for
example,copper)
and
breaks
down
certain
hose
materials
.
Use
only
hoses
and
lines
that
are
iden-
tified
with
a
green
mark
(stripe)
or
the
lettering
R-
134a"
.

"
Immediately
plug
open
connections
on
AIC
com-
ponents
to
prevent
dirt
and
moisture
contamina-
tion
.

"
Do
not
steam
clean
condensers
or
evaporators
.

Use
only
cold
water
or
compressed
air
.

AIR
CONDITIONING

650-2
RADIO

"
A
320-watt
Harmon-Kardon
ten
speaker
system,
including



RADIO
AND
SPEAKER
SERVICE
a
separate
high
power
multi-channel
audio
amplifier
and
two
sub-woofers
.
In
this
system,
thebass
and
volume
out-

puts
from
the
selected
audiosource
automatically
com-



Radio,
removing
and
installing

pensate
for
vehicle
speed,
making
constant
volume

adjustments
unnecessary
.
An
additional
feature
ofthis



CAUTION-
sound
system
is
the
ability
to
switch
from
normal
left-right



"
Before
beginning
work
on
the
radio
or
sound
stereo
into
Spatial
Enhancement
Mode,
which
produces
a



system,
verify
that
the
radio
is
an
original
equip-
fuller,
rounder
sound
.
See
Fig
.
3
.



ment
BMW
radio
and
that
thewiring
harness
has
not
been
modified
.
TheE36
radio
is
also
equipped
with
a
built-in
anti-theft
sys-

tem
.
lf
power
is
removed
from
the
radio
circuitry
by
removing

the
radio
electrical
connectors,
or
by
disconnecting
the
bat-
tery,
the
radio
is
rendered
inoperative
.
The
radio
is
not
perma-

nently
damaged,
and
proper
operation
can
be
restored
by

entering
the
radio
anti-theft
code
.

Fig
.
3
.
Ten
speaker
sound
system
.

RADIO
AND
SPEAKER
SERVICE

"
Servicing
of
aftermarket
sound
equipment
should
be
referredto
an
authorized
agent
of
the
equip-
ment's
manufacturer
.

"
Do
not
remove
radio
or
disconnect
the
batterywithout
first
obtaining
the
anti-theft
code
.

1.
Carefully
pry
open
small
square
covers
at
left
and
right

sides
of
radio
.

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

ELE--2
ELECTRICAL
WIRING
DIAGRAMS

FUSE
LINK

64766

I-i



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-
i



a
1



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_
ZJ
I



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END
INECONTROL



ENGINECONTROL



TRANSMISSION
CONTROL



DATALINK
MODULE



MODULE
RELAY



MODULE
(EGS)



CONNECTOR



I



I
I



I

5

(F18



--_______________________________________________



O19~
N
RIBUON
BOX
I
FUSE



II
15A
o~___________________________________________________Q~____-aft

TO
FUSE
F5



C



RED
(DIAGRAM
6
OF
7)

FUELPUMP



I



(DIAGRAM60F7)



C'



RED



\



L------r>
(DIAGRAM60F7)

I
LOW



F



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FRONT



HIGH
BEAM



FOGJ
BEAM
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LIGHT



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LIGHT



I
j
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LIGHT
RELAY



I



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li



SJ
RELAY

1992

1993W/TRUNK
MOUNTEDBATTERV

1993W/ENGINE
COMPARTMENTMOUNTEDBATTERV

1993W/TRUNK



1993W/ENGINE



1992



1992



WI
ENGINE



W/TRUNK

BATTERY



MOUNTEDBATTERV



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MOUNTED
BATTERY



MOUN
O
TEDBATT
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ERV



¢I¢I



MOUNTEDBATTERV

TOFUSEF40
<
,.k
RED
(DIAGRAM
6
OF
7)



I



I



(DIAGRAM
3
OF
7)
TO
FUSEF3



E



RED
(DIAGRAMfiOF7)



"
.
1k
I



(DIAGRAM
6OF7)

>I
mJ~CANADA

RED
BNUMPSTART
JUNCTION
POINT
REO

Power
Distribution

1992-93
318i
Only
(1
of
7)

-UNCTION
POINT

TOFUSEF15



TO
FUSE
F29
(DIAGRAM60F7)
(OIAGRAM6OF7)

I
~1
.
FUEL


_I



I
_I
~
(PUMP



GENERATOR



STARTER
I
,(



I
RELAY

TO
IGNITION
SWITCH
QA

TOFUSE
F20

TOFUSEF19
FRED
(DIAGRAM6OF7)



`
I



III



-
(DIAGRAM70F7)

OXVGENSENSOR
RELAY
(4CVL)

RED
RED

RED

ON-BOARD
LEFTPOWERRIGHTPOWERLEFTPOWER
TOFUSEF17



COMPUTERHORN



WINDOWMODULE



WINDOWMODULE



WINDOW
MODULE
(DIAGRAM
60F
7)



RELAY

TO
COMFORTRELAV

ELE

Power
L

1992-9332

RED

E01



IIIII
FUSIBLE
LINK



I
GENERATOR
STARTER

BATTERY



¢



(FUEL
-
(325)



S



26



66



PUMP
I



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RELAY

2
G
ENGINE
CONTROL



TRANSMISSION
CONTROL



DATA
LINK



ENGINECONTROL



iMODULE



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(EGG)



CONNECTOR



MODULE
RELAY

15
--



---



-



-



----



--



FRONT
POWER
FUSE



r



-



i
DISTRIBUTIONBO
;
I
16A

R
ITIT

TO
FUSE
FS



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C
(DIAL
RAM
6
OF
7)
TO
FUSE
F40



D



RED



TO
IGNITION
SWITCH



A



RED
(DIAGRAM
6
OF
7)



(DIAGRAM
3
OF
7)
TO
FUSE
F3



E



RED



TO
FUSE
F20



B



RED
2



(DIAGRAM6OF7)



(DIAGRAM
6OF7)
I
I



I
I
-
I



TOFUSEF19

:
:!!RED---

RED



S
TOCOMFORTI
(DIAGRAM
6
OF
7)



(DIAGRAM
70
FUEL
PUMP



TO
FUSE
F41



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TOFUGEF35
(DIAGRAM
B
OF
7)



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(DIAGRAM
50
TOFUSEFSB
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RED



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.
(DIAGRAM
6
0F
7)



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8



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FRONT
POWER
B



6



6



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BOX
F4



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I
LOW



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I
30A



30A



~
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.
25A
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F



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FOG



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BEAM



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_____
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LIGHT
l
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-



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3
21
2
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m
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3
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M



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F7)



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IAGRAM
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OFOF
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0



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ON-BOARD



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RIGHTPOWER



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POWERTOFUSEFI7



COMPUTERHORN



WINDOW
MODULE



WINDOWMODULE



WI
NDOWMODULE
(DIAGRAMS
OF7)



RELAY
64770

EKE

Power

1992-

VIO



FROMIGNITION



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VIO



FROM
IGNITI
ON
SWITCH



SWITCH
2S



(DIAGRAM3OF7)
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4
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14



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CHECKCONTROL



WIPER



WIPER
MOTOR



INSTRUMENT



BRAKELIGHT



CRUISE
CONTROL



CRUISE
CONTROL



COMPRESSOR



NORMALCOMPUTER
MODULE
RELAYRELAY
CLUSTER
SWITCH
MODULE



SWITCH
CONTROL
SPEEDRELAYRELAY

GRN



0



FROM
IGNITION



GRN



P



FROM
IGNITION
~I
I
VSWITCH



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(DIAGRAM
30F7)



,~
(DIAGRAM
3OF7)
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POWER
TO



I
DISTRIBUTIONBOX
FUSE
F23



G
(DIAG
RAM
4
0F
7)



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FUSE



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F26



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F25



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TRANSMISSION



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RANGESWITCH



I
-
I



I
-
I



I
-
I



CONNECTOR

MIRRORCONTROL
LIGHT
LOWBEAM



AUTOMATIC
PROGRAM
INSTRUMENT
SWITCHSWITCH
LIGHTRELAY



TRANSMISSION
SWITCH
CLUSTER
WIOEGSONLY



RANGESWITCH

FROM
___________-----1FRONTPOWER
FUSEF24



CI



DISTRIBUTION
BC
3



(DIAGRAM30F7)
FUSE



FUSEFUSE
F23



F22
F21
O



O



SA



SA



5A

DATA
LINK



6



j



2
I
CONNECTOR

REVERSING
LIGHTSWITCH

CANADA

O



"
-1993
ONLY

O4



4



4



1



S



B



3



B



53



4

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v
I~



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v



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v



v



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v



v



v

_I
INTEGRATED
COMBINATION
INSTRUMENT
REAR
JETHEATER
MULTI-
UNLOADER
DAYTIMERUNNING
LIGHT
ASSSLIP
ABSRELAY
CLIMATE
SWITCH
CLUSTER
DEFOGGER
THERMOSWITCH
FUNCTION
RELAY
LIGHTSCODING
SWITCH
CONTROL
REGULATION



RELAY



CLOCK



DIODE



MODULE
CONTROL
MODULE
64776