fan BMW M3 1995 E36 Service Manual
Page 447 of 759
GENERAL
E36
cars
are
equipped
with
integrated
automatic
heating
and
air
conditioning
systems
.
Many
of
the
procedures
given
in
this
repair
group
require
that
the
A/C
refrigerant
charge
be
evacuated
using
specialized
equipment
.
See
A/C
System
Warningsand
Cautions
later
in
this
repair
group
.
HEATER
AND
CONTROLS
Blower
motor,
removing
and
installing
NOTE-
On
6-cylinder
cars,
the
plastic
top
enginecover
and
fuel
rail
covermustbe
removed
.
The
fuel
injectorhamess
re-
taining
screws
must
be
removed
and
the
harness
set
aside
.
The
engine
control
module
(ECM)
cover
must
be
removed,
the
control
unit
connectors
unplugged
and
the
harness
pulled
out
of
the
way
.
See
130
Fuel
Injection
.
1
.
Disconnect
negative
(-)
cable
from
battery
.
2
.
Open
hood
.
Unclip
engine
bulkhead
plenum
grille
at
base
of
windshíeld
and
remove
grille
.
See
Fig
.
1
.
HEATING
AND
AIR
CONDITIONING
640-1
640
Heating
and
Air
Conditioning
GENERAL
.
...
.
....
.
.
.
.
.
.
.
.
.
.......
.
.
.
640-1
Heater
andA/C
air
distribution
motor,
replacing(rotary-knob)
.
.
...
.
.
.
.......
.
640-10
HEATER
AND
CONTROLS
.
.....
.
.
.
.
.
.
.640-1
Rear
Window
Defogger
.
.
.
.
.
.
.
.
.
.
...
.
.
.
640-10
Blower
motor,
removing
and
installing
.
.
.
.
.
.
640-1
Rear
Window
Blower
(convertible
models)
.
.640-10
Blowermotor
resistor
pack,
replacing
.
.
.
.
.
.
640-3
AIR
CONDITIONING
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-11
Heater
valve,
replacing
...........
.
.
.
.
.
.
.
640-3
Heater
box,
removing
and
installing
.
.
.
.
.
.
.
.
640-4
A/CSystem
Warnings
and
Cautions
.
.
.
.
.
.
:640-11
Heater
core,
replacing
.....
.
.
:
....
.
.
.
.
.
.
.
640-6
A/C
compressor,
replacing
.
.
::.
:
:
.
.
.
.
.
.
.
.640-12
Heater
core
temperature
sensor,
replacing
.
.
640-7
A/C
Compressor
Clutch
.
.
.
.
.
.
.
:
.
.
.
.
.
.
.
.
.
640-13
Heater
andA/C
Control
Head
.
.
....
.
.....
.
640-7
A/C
condenser,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-14
Heater
andA/C
control
head,
removing
A/C
receiver/drier,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
640-15
and
installing
(rotary-knob)
.
.
....
.
......
640-7
A/C
expansion
valve,
Heater
andA/C
control
head,
removing
removing
and
installing
...
.
.....
.
.
.
.
.
.
.
640-16
and
installing
(digital-display)
.
.....
.
.....
640-8
A/C
evaporator,
removing
and
installing
.
.
..
640-17
Heater
andA/C
control
module,removing
A/C
evaporator
temperature
sensor,
and
installing
(rotary-knob)
.
.
...
.
.
.
.
.
.
.
.
640-8
replacing
.
.
.
.
.
.
..............
.
.
.
.
.
..
640-17
Heater
andA/C
control
module,removing
A/C
microfilter,
replacing
......
.
....
.
.
.
..
640-18
and
installing
(digital-display)
.
...
.
.
.
.
.
...
640-8
Sensor
fan
for
interior
temperature,
TABLES
replacing
.
.
.
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-9
a
.
Blower
Motor
Test
Values
.........
...
.
.
......
640-3
Heater
andA/C
AirDistribution
Motors
.
.
.
.
.
.
640-9
b
.
Heater
Core
Temperature
Sensor
Test
Values
...
.640-7
c
.
Evaporative
Temperature
Sensor
Test
Values
...
640-17
d
.
A/C
System
Fluid
Capacities
(total)
..
..........
640-18
0012527
Fig
.
1
.
Detach
grille
retaining
clips
(arrows)
and
pull
grille
upward
and
out
of
rubbergasket
.
CAUTION-
Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautionsgiven
at
the
front
of
this
manual
onpage
viii
.
HEATER
AND
CONTROLS
Page 449 of 759
9
.
Release
blower
motor
retaining
strap
andremove
blow-
er
motor
and
fans
fromcowl
opening
.
NOTE-
Twist
and
rotate
blowermotor
assembly
to
facilítate
re-
moval
from
opening
.
If
the
blower
motor
is
to
be
rein-stafled,
use
care
not
to
damage
fan
wheels
during
removal
.
ff
the
blower
motor
fs
to
be
replaced,
cut
offfan
wheels
at
center
to
aid
in
removal
.
10
.
Installation
is
reverse
of
removal
.
When
installing
a
re-
placement
blower
motor,
instan
motor
into
cowlarea
before
installing
fan
wheels
.
Blower
motor
test
specifi-
cations
are
listed
in
Table
a
.
NOTE
-
On
replacementblowermotors
from
BMW,
thefan
wheels
come
unattached
to
aid
in
installation
.
Locatearrow
on
blower
motor
and
instan
fan
wheels
atthis
po-
sition
.
Be
sure
color
coolng
matches
.
Retain
fan
wheels
using
the
new
clips
.
See
an
authorized
BMW
parts
de-
partment
for
the
latest
parts
information
.
Table
a
.
Blower
Motor
Test
Values
Testingvoltage
13
VDC
Operating
voltage
9-15
VDC
Max
.
current
consumption
(approx
.)
12
amps
Maximum
speed
3,600-4,000rpm
Axialplay
(max
.
allowable)
1
.0
mm
(0
.04
in
.)
Blower
motor
resistor
pack,
replacing
The
blower
resistor
pack
is
clipped
into
the
upper
left
side
of
theheater
box
.
1
.
Remove
lower
left
dash
trim
panel
.
See513
Interior
Trim
.
2
.
Working
under
left
(driver's)
side
of
dash,
unclip
and
pulí
out
resistor
pack
from
sideof
heater
box
.
Remove
harness
connector
from
resistor
pack
.
See
Fig
.
7
.
3
.
Installation
is
reverse
of
removal
.
Heater
valve,
replacing
The
two-way
heater
valve
is
located
in
the
rear
of
the
engine
compartment
on
the
driver
side
.
The
solenoid
operated
valves
control
the
coolant
flow
through
the
dual-chamber
heater
core
.
1
.
Drain
engine
coolant
.
See
170
Radiator
and
Cooling
System
.
HEATING
AND
AIR
CONDITIONING
640-
3
uuiGO4I
Fig
.
7
.
Blower
fan
resistor
pack
(black
arrow)
and
resistor
pack
re-
ceptacle
(white
arrow)
below
left
sideof
dash
.
WARNING
-
Allow
the
cooling
system
to
cool
before
opening
ordraining
the
cooling
system
.
2
.
Disconnect
hoses
and
harness
connector
at
heater
valve
.
See
Fig
.
8
.
001[ó38b
Fig
.
S
.
Hoses
(A)
and
harnessconnector
(B)
at
heatervalve
.
3
.
Carefully
pull
heater
valve
out
of
rubber
mounting
and
pull
up
and
out
of
engine
compartment
.
4
.
Installation
is
reverse
of
removal
.
Use
new
hose
clamps
.
Inspect
hoses
and
replace
asnecessary
.
HEATER
AND
CONTROLS
Page 455 of 759
Sensor
fan
Fig
.
25
.
Digital
display
A/C
control
head
components
.
2
.
Unscrew
left
and
right
screws
retaining
control
head
to
control
module
.
Press
retaining
clips
and
release
front
plate
from
control
head
.
Remove
A/C
control
module
from
control
head
housing
.
Sensor
fan
for
interior
temperature,
repiacing
A
small
electricfan,installed
in
the
A/C
control
head,
draws
cabin
air
past
the
climate
control
temperature
sensor
.
1.
Remove
A/C
control
head
as
described
earlier
.
2
.
Rotary-knob
control
head
:
Disconnect
electrical
con-
nector
from
top
of
control
head
housing
.
Pry
open
plas-
tic
housing
and
remove
sensor
fan
.
See
Fig
.
26
.
0013181
Fig
.
26
.
Sensor
fan
(A)
and
harness
(B)
in
back
of
A/C
control
head
(rotary-knob
control
head
shown)
.
3
.
Digital
display
models
:
Disconnect
electrical
harness
connector
from
control
head
housing
.
Remove
screws
holding
sensor
fan
to
bottom
of
control
moduleand
re-
move
.
Refer
to
Fig
.
25
.
4
.
Installation
is
reverse
of
removal
.
HEATING
AND
AIR
CONDITIONING
640-
9
Heater
and
A/C
Air
Distribution
Motors
The
recirculation,
fresh
air
and
othervent-duct
flaps
are
controlled
electrically
via
a
series
of
air
distribution
actuating
motors
.
Cars
with
the
rotary-knob
control
head
use
three
elec-
tromechanical
motors,
each
held
in
place
via
a
small
plastic
clip
.
See
Fig
.
27
.
Rightside
of
heater
box
l
Fig
.
27
.
Location
of
early
production
air
distribution
motors
(arrows)
.
Later
systems
(with
the
digital
display
control
head)
use
five
distribution
motors,
four
of
which
are
digítally
controlled
.
See
Fig
.
28
.
HEATER
AND
CONTROLS
Page 456 of 759
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
Page 460 of 759
640-14
HEATING
AND
AIR
CONDITIONING
7
Fig
.
39
.
A/
C
compressorand
clutch
components
.
8
00871208
1.
Clutch
plate
retaining
bolt
5
.
A/C
compressor
pulley
2
.
Clutch
plate
6
.
Clutch
retaining
circlip
3
.
Pulley
retaining
circlip
7
.
Clutch
(magnetic
winding)
4
.
Clutch
bearing
8
.
Compressor
00870082
Fig
.
40
.
A/
C
compressor
driveplate
canbe
held
stationary
with
strap
toolto
allow
removal
of
retaining
bolt
.
NOTE-
BMWs
are
equipped
with
compressors
from
various
manufacturers
.
Special
tools
may
be
required
tore-
move
driveplate
orpulley
.
AIR
CONDITIONING
Tightening
Torque
"
Compressor
clutch
bolt
to
compressor
shaft
.....
.
....
..
.
.
20
Nm
(15
ft-Ib)
A/C
condenser,
replacing
1
.
Following
manufacturer's
instructions,
connect
an
ap-
proved
refrigerant
recovery/recycling/recharging
unitto
A/Csystemand
discharge
system
.
WARNING
-
Do
not
dischargelcharge
the
AIC
system
without
proper
equipment
and
training
.
Damage
to
the
vehi-
cle
and
personal
injury
may
result
.
2
.
Remove
front
bumper
and
radiator
grilles
.
See510
Ex-
terior
Trim,
Bumpers
.
3
.
Remove
auxiliary
electric
radiator
fan
.
See
170
Cool-
ing
System
.
4
.
DetachA/C
lines
from
lower
right
corner
of
condenser
.
Plug
lines
immediately
.
See
Fig
.
41
.
Fig
.
41
.
A/
C
flange
bolts
at
condenser
(arrows)
.
5
.
Remove
condenser
mounting
bolts
from
frontradiator
support
.
See
Fig
.
42
.
6
.
Lift
up
condenser
to
disengage
from
lower
mounts
and
remove
from
below
.
7
.
Installation
is
reverse
of
removal
.
CA
UTION-
"
Always
replace
O-rings
when
reconnecting
re-
frigerant
fines
.
"
When
installing
a
new
condenser
always
replace
receiverldrier
unit
.
Page 519 of 759
84831
HEADLIGHT/
RIGHT
I
I
FOG
LIGHT
I
I
HIGH
I
I
WASHER
I
(BEAM
I
(CANADA)
I_
I
LIGHT
,7
WASHER
BIGHT
I
FLUID
I
I
LOW
I
I
LEVEL
I
I
BEAM
SWITCH
LIGHT
I
I
_
(
GSA
)
I
_I
TURN
I
LIGHT
I
I
I
L_
__--_J
I
I
DIMMER
I
I
I
I
INSTRUMENT
I
I
CLUSTER
I
I
LIGHT
I
I
SWITCH
BRN
1
SPIN
FROMLEFTWASHER
JETHEATER
1
(DIAGRAM20F3)
G202
1993
ONLY
Ground
Distribution
1992-93
(1
of
5)
STARTEP
I
I
RELAY
I
I
1993
ONLY
RIGHT
(
)
FRONT
AUXILIARY
TURN
LIGHT
ELECTRICAL
WIRING
DIAGRAMS
ELE-35
LEFT
I
I
PARK
I
I
LIGHT
I
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RELAY
I
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RIGHT
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I
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II
LIGHT
RIGHT
(
)
FRONT
TURN
Y
LIGHT
_
__
_
_
_
_
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_
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AUXILIARY
ENGINE
LEFT
LEFT
LEFT
-
LEFT
r
-1
(
(
FAN
I
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COOLANT
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I
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I
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1993
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IGNITION
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LIGHT
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-
1993
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DIMMER
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I
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Page 524 of 759
ELE-40
ELECTRICAL
WIRING
DIAGRAMS
RIGHTHEADLIGHT/
RIGHT
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1994-95
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Page 529 of 759
890fi9
INTER-
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Page 534 of 759
ELE-50
ELECTRICAL
WIRING
DIAGRAMS
I-
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1998Except
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Page 538 of 759
ELE-54
ELECTRICAL
WIRING
DIAGRAMS
HEADLIGHT/
RIGHT
RIGHT
LEFTLEFT
LEFT
FOGLIGHT
HIGH
RIGHT
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DOUBLE
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1_1
L-1
I
L
-I
I
I
I
1
I
I
I
_
11
1
11
I
L-1
\
1G202
1
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