BMW M3 1992 E36 Workshop Manual

Fig
.
42
.
Upper
A/C
condensermounting
bolts
(arrows)
.

8
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant

Capacities
.

A/C
receiver/drier,
replacing

The
A/C
receiver/drier
is
mounted
in
the
front
right
cornee
of
the
engine
compartment
behind
the
headlight
assembly
.

CAUTION-

The
receiver/drier
must
be
replaced
when
-There
is
dirt
in
the
AIC
system
-The
compressor
has
seized
or
has
been
re-
placed
for
any
reason
-The
condenser
or
evaporator
are
replaced
for
any
reason
-The
AIC
system
is
leaking
and
there
is
no
more
refrigerant
-The
AIC
system
was
open
for
24
hours
or
more
.

1
.
Following
manufacturer's
instructions,
connectan
ap-

proved
refrigerant
recovery/recycling/recharging
unit
to

A/C
system
and
discharge
system
.

2
.
Remove
right
headlight
assembly
.
See
630
Exterior
Lighting
.

CAUTION-
3
.
Disconnect
A/C
electrical
harness
connectors
.
See
Fig
.



Always
replaceO-rings
when
reconnecting
refrig-
43
.



erant
lines
.

4
.
Remove
refrigerant
pressure
lines
from
receiver/drier
.

Plug
lines
immediately
.

5
.
Remove
receiver/drier
mounting
bolts
.

0013182

6
.
Remove
underbody
splash
shield
on
passenger
side
.

See
Fig
.
44
.

7
.
Remove
passenger
side
brake
cooling
duct
.
Discon-

nect
outside
temperature
sensor
harness,
if
applicable
.

HEATING
AND
AIR
CONDITIONING



640-15

0012669

Fig
.
43
.
A/
C
receiver/drier
electrical
harness
connectors
(A),
pressure
line
retaining
bolts
(B),
andmounting
bolts
(C)
.

0012668
Fig
.
44
.
Passenger
sidesplash
shield
retaining
screws
(arrows)
.

8
.
Push
receiver/drier
down
andremove
from
underneath
car
.
Make
sure
that
receiver/drier
is
clear
of
any
electri-
cal
harnesses
.

9
.
Installation
is
reverse
of
removal
.

10
.
Before
recharging,
evacuate
system
for
at
least
30
min
.

Recharge
system
following
equipment
manufacturer's

instructions
.
See
Table
d
.
A/C
System
Refrigerant

Capacities
.

AIR
CONDITIONING

640-16



HEATING
AND
AIR
CONDITIONING

A/C
expansion
valve,

removing
and
installing

Fig
.
45
.
Control
module
carrier
retaining
screws
(arrows)
.

1
.
Following
manufacturers
instructions,
connectanap-

proved
refrigerant
recovery/recycling/recharging
unit
to

A/C
system
and
discharge
system
.

WARNING
-

Do
not
discharge%harge
the
WC
system
without
properequipmentand
training
.
Damage
to
the
vehi-

cle
and
personal
injury
may
result
.

2
.
Remove
glove
compartment
and
glove
compartment

support
frame
.
See513
Interior
Trim
.

3
.
Remove
right
side
footwell
vents
.

4
.
Remove
right
side
control
module
carrier
screws
and
tilt

carrier
down
.
See
Fig
.
46
.

5
.
Remove
expansion
valve
cover
.
See
Fig
.
46
.

Fig
.
46
.
Four
screws
retain
expansion
valve
cover
(arrows)
.

AIR
CONDITIONING

0012666
0012663

6
.
Remove
A/C
refrigerant
line
fiange
bolt(s)
from
expan-

sion
valve
.
Plug
lines
immediately
.
See
Fig
.
47
.

NOTE
-

If
necessary,
remove
air
plenum
grille
fromrear
of
en-

gine
compartment
as
described
earlier
in
Blower
mo-

tor,
removing
and
installing
.
Remove
wiring
hamess

cover
screws
and
then
remove
right
side
plenum
screws
.
Reaching
finto
the
plenum
chamber,
remove
AIC
fine
flange
bolt
to
allow
expansion
valve
room
for
removal
.

Fig
.
47
.
Refrigerant
line
fiange
mounting
boltat
expansion
valve(arrow)
.

7
.
Remove
screws
from
top
of
expansion
valve
and
re-

move
expansion
valve
from
evaporator
.
See
Fig
.
48
.

Fig
.
48
.
Expansion
valve
mountingscrews
(A)
.

0011667

CAUTION
-

Always
replace
O-rings
when
reconnecting
refrig-
erant
fines
.

9
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant

Capacities
.

A/C
evaporator,
removing
and
installing

1
.
Followingmanufacturer's
instructions,
connectanap-proved
refrigerant
recovery/recycling/recharging
unit
to
A/C
system
and
discharge
system
.

2
.
Remove
complete
heater
boxas
described
earlier
.

3
.
Remove
expansion
valve
as
described
earlier
.

4
.
Unfasten
evaporator
sensor
electrical
harness
connec-
tor
and
puli
out
sensor
from
ieft
side
of
heater
box
.
See
Fig
.
50
.

Fig
.
49
.
Pull
out
evaporator
sensor
from
housing
in
direction
of
arrow
.

5
.
Remove
rear
heater
box
cover
.

6
.
Remove
clips
retaining
lower
evaporator
housingcover
.
Tilt
outheater
core,
then
pull
evaporator
out
of
housing
.

7
.
Installation
is
reverse
of
removal
.

CAUTION
-

Always
reptace
O-rings
when
reconnecting
refrtg-
erant
fines
.

8
.
Before
recharging,
evacuate
system
for
at
least
30
min
.

Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant

Capacities
.

HEATING
AND
AIR
CONDITIONING



640-17

8
.
Installation
is
reverse
of
removal
.



A/C
evaporator
temperature
sensor,

replacing

ou12b46

The
evaporator
temperature
sensor
is
mounted
in
the
left
(driver)
side
of
theheater
box
behind
thecenter
console
.

1
.
Remove
lower
dash
panel
and
knee
boister
on
driver
side
.
See
513
Interior
Trim
.

2
.
Remove
left
footwell
ventilation
duct
byremoving
re-
taining
rivet
in
bottom
of
duct
.
Pull
it
down
and
away
from
heater
box
.
See
Fig
.
50
.

Fig
.
50
.
Left
footwellventilatíon
duct
(arrow)
.

0o1300ba

3
.
Disconnect
sensor
electrical
connector
from
heater
box
.
Pull
sensor
straight
out
of
heater
box
.
Refer
to
Fig
.
49
.

4
.
Installation
is
reverse
of
removal
.
Table
c
.
lists
evapo-

rator
temperature
sensor
test
values
.

Tablec
.
Evaporator
Temperature
Sensor

Test
Values

Test
temp
.



Resistance

23°F
(-5°C)



11
.4
-11
.9
k
ohms

32°F
(0°C)



8
.8
-
9
.2
k
ohms

41
°F
(5°C)



6
.8
-
7
.2
k
ohms

50°F
(10°C)



5
.3-5
.6
k
ohms

59
°
F
(15°C)



4
.2
-4
.5
k
ohms

68°F
(20°C)



3
.3
-
3
.6
k
ohms

77°F
(25°C)



2
.6-2
.9
k
ohms

86°F
(30°C)



2
.1
-
2
.3
k
ohms

95°F
(35°C)



1
.7
-1
.9
k
ohms

AIR
CONDITIONING

640-18



HEATING
AND
AIR
CONDITIONING

A/C
microfilter,
replacing

1
.
Remove
glove
compartment
.
See
513
Interior
Trim
.

2
.
Remove
right
footwell
ventilation
duct
.
See
Fig
.
51
.

0012664

Fig
.
51
.
Unfasten
retaining
rivets
from
right
ventilation
duct
(arrows)
.

3
.
Remove
right
side
control
module
carrier
screws
and
tilt

carrier
down
.
See
Fig
.
52
.

Fig
.
52
.
Control
module
carrier
retaining
screws
(arrows)
.

0012666

4
.
Rotate
A/C
microfilter
housing
release
knob
about45°

counterclockwise
and
remove
filter
housing
cover
.
See
Fig
.
53
.

5
.
Remove
microfilter
while
moving
module
harnesses

out
of
the
way
.

6
.
Installation
is
reverse
of
removal
.

AIR
CONDITIONING

Fig
.
53
.
A/
C
microfilter
cover
release
knob
(arrow)
on
passenger
side
ofheater
box
.

Table
d
.
A/CSystem
Fluid
Capacities
(total)

Fluid



I
Quantity
R-12
refrigerant



1200g
t
25
g
(2
.65
Ibsa
0
.05lbs
.)

R-134a
refrigerant



1000
g
±
25
g
(2
.20
Ibs
.t
0
.05lbs
.)

PAG
oil
SP-10



1200
ml
f
20
ml(R12
system)
(6
.8
oz
.
±
0
.7
oz
.)

Nippondeso120mi
Refrigerant
oil
(R1
34a
system)



I
Seiko
Seiki
150m1

GENERAL
.........
.
.......
.
.
.
.
.
.
.
.
.
..
650-1



Rear
speaker,
removing
and
installing
.
.
.
.
.
.650-5

Door
panel
speaker,

AUDIO
SYSTEM
............
.
.
.
.
.
.
.
.
.
..
650-1



removing
and
installing
.
.
.
.
.....
.
.
.
.
.
.
.
.650-5

Radio
connector
..
.
.
.
.
.
.
.
.
.
.......
.
.
.
.
.
.
650-6

RADIO
AND
SPEAKER
SERVICE
.
.
.
.
.
..
650-2

Radio,
removingand
installing
.
.
.
.
.
.
...
.
..
650-2

Left
footwell
speaker,

removing
and
installing
.
....
.
.
.
.....
.
.
.
650-3

Right
footwell
speaker,

removing
and
installing
.
....
.
.
.
.....
.
..
650-4

GENERAL



AUDIO
SYSTEM

Thissection
coversthe
BMW
factory-installed
sound
sys-



The
BMW
E36
is
equipped
with
a
three
band
radio/cassette

tem,
including
radio
and
speaker
removal,
radio
connectors



player
unit
mounted
in
the
middle
of
thecenter
console
.
In
ad

and
terminal
designations
.



dítion
to
AM
and
FM
bands,
the
radio
will
receive
broadcasts
from
theNational
Weather
Service
.

The
antenna
is
incorporated
into
the
rear
window
defogger
.

650
Radio

Fig
.
1
.



Radio
amplifier
(premiumpackage)
in
luggage
compartment
behind
left
panel
.

RADIO
650-1

TABLE

a
.
Radio
Connector
Terminal
Designation
...
.
......
650-6

The
cassette
deck
is
equipped
with
the
Do1byTM
C
noise
re-
ductionsystem,
for
improved
tape
performance
with
reduced

background
tape
noise
.

A
6-speaker
audio
system
was
standard
in
the
early
years

ofthe
model
line
.
Many
additional
features
have
been
in-
stalled
as
optional
or
standard
equipment
duringthevehicle
production
run
.

"
A
200-watt
power
amplifier
with
custom-contoured

equalization
and
ten
speaker
output
.
See
Fig
.
1
.

"
A
multi-disc
compact
disc
changer,
for
which
the
vehicle

and
the
radio
are
prewired
.
See
Fig
.
2
.

Fig
.
2
.



Optional
multi-disc
compact
disc
changerand
disc
cartridge
.

AUDIO
SYSTEM

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
.

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

650-
4
RADIO

3
.
Remove
speakerby
removing
mountingscrews
.
See

Fig
.
8
.

Fig
.
8
.



Speaker
mounting
screws
(arrows)
.

0012580

4
.
Disconnect
harness
connector(s)
from
speaker
.
See

Fig
.
9
.

001,58

Fig
.
9
.



Disconnect
speaker
electrical
connector(s)
in
direction
shown

(arrows)
.

5
.
Installation
is
reverse
of
removal
.

Right
footwell
speaker,

removing
and
installing

1
.
Remove
glove
compartment
lower
trim
.
See
Fig
.
10
.

2
.
Rotate
speakercover
plastic
retainer
1
/a
turn
.
Remove

door
sea¡at
edge
of
speaker
cover
.
See
Fig
.
11
.

3
.
Pul¡
speaker
trim
panel
away
from
body
and
then
pul¡

panel
back
toward
rear
of
car
.

RADIO
AND
SPEAKER
SERVICE

0012582

Fig
.
10
.
Remove
lower
glove
compartment
trim
panel
retaining
screw

(black
arrow)
.
Pull
trim
in
direction
shown
(white
arrows)
.

0012583

Fig
.
11
.
Speaker
cover
retainer
(black
arrow)
.
Pulltrim
in
direction
shown
(white
arrow)
.

4
.
Remove
speaker
by
removing
mountingscrews
.
Dis-

connect
harness
connector(s)
from
speaker
.

5
.
Installation
is
reverse
of
removal
.

Rear
speaker,
removing
and
installing



Door
panel
speaker,

removing
and
installing

NOTE
-

Rear
speakers
in
convertible
models
are
installed
un-
der
the
rear
side
panels
.
For
rearside
panelremoval
procedure,
see
411Doors
.

1
.
Working
at
rear
parcel
shelf,
pry
speakercoverby
inner

edge
and
remove
.
See
Fig
.
12
.

0011632

Fig
.
12
.
Pry
up
inner
edge
of
speaker
cover
off
rear
parcel
shelf
.

2
.
Remove
mountingscrews
and
depress
speaker
retain-

ing
clip
.
See
Fig
.
13
.
Lower
speaker
into
trunk
.

Fig
.
13
.
Remove
screws
(A)
and
depress
clip
(B)
.

4
.
Installation
is
reverse
of
removal
.

0011633

3
.
Disconnect
speaker
connector
andremove
speaker

from
box
.

RAM
650-5

1.
On
carswith
side-impact
airbags,
disconnect
negative
(-)
cable
from
battery
.

CAUTION-

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

2
.
Remove
inner
door
panel
.
See
411
Doors
.

WARNING
-

Some
1997
and
all
1998
model
year
cars
are
equipped
with
front
side-impact
airbags
in
the
front
doors
.
When
servicing
the
doors
with
front
side-im-
pact
airbags,
alwaysdisconnect
the
negative
()
battery
terminal
.
See
721Airbag
System
(SRS)
for
cautions
and
procedures
relating
to
theairbag
sys-
tem
.

3
.
On
back
of
door
panel,
remove
nut
on
top
of
speaker
retaining
bracket
and
remove
bracket
from
behind

speaker
.
See
Fig
.
14
.

Fig
.
14
.
Speaker
retaining
nut
(arrow)
.

4
.
Disconnect
speaker
connector
from
harness
connector
and
remove
loudspeaker
forwardthrough
door
panel
.

5
.
Installation
is
reverse
of
removal
.
Install
side-impact

airbag
using
new
screws
.
See
721
Airbag
System

(SRS)
.

RADIO
AND
SPEAKER
SERVICE

650-
6
RADIO

Radio
Connector



Tablea
.
Radio
Connector
Terminal
Designation

Table
a
lists
radio
connector
terminal
designations
.
The
pin

numbers
are
identified
in
Fig
.
15
.

20103040
50

60
90
7
0
0
80
110120130140150160
170

Fig
.
15
.
Radio
connector
.
See
Tablea
.

RADIO
AND
SPEAKER
SERVICE

Terminals
1-17

C1)
Connector

0011850

Connector
SignalTerminal

1



1
Speaker,
left
front
+
2



1



Speaker,
right
front
+
3



1
Speaker,
left
rear
+

4



1
Telephone
mute
feature
(where
applicable)

5



1
Positive
(terminal
R)

6



1
Frontspeaker,
left

7



1
I-bus
connection
(diagnostics)

8



Speaker,
left
front

9



1
Constant
positive,
Terminal
30

10



Speedometer
signal
for
speed-sensitive
volume
control
(where
applicable)

11



1



Speaker,
rightfront

12



1
Speaker,
left
rear

13



1
Illumination
(terminal
58G)

14



Speaker,
right
rear

15



1
Ground
(terminal
31)

16



Automatic
antenna
or
window
antenna
amplifier
or
premiumsound
system
amplifier

17



Notassigned

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