engine mount BMW 328i 1997 E36 Workshop Manual
Page 450 of 759
640-4
HEATING
AND
AIR
CONDITIONING
Heater
box,
removing
and
installing
The
heater
box,
located
underneath
thecenter
of
the
dash-
board,
houses
theheater
core,
the
A/C
evaporator,
and
asso-
ciated
sensors
and
actuators
.
Removal
of
theheater
box
requires
that
the
A/C
refrigerant
be
discharged
.
CAUTION-
"
Removing
the
heater
box
requires
evacuating
the
AIC
system
.
DO
NOT
attempt
this
procedure
without
proper
tools
and
training
.
"
Any
person
who
services
a
motor
vehicle
air
con-
ditioner
must,
by
law,
be
properly
trained
and
cer-
tified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-
approved
recycling
course
to
be
certified
UU12639
Fig
.
10
.
Heater
core
mounting
nuts
at
left
sideof
bulkhead
(arrow)
.
1
.
Drain
engine
coolant
.
See
170
Radiator
and
Cooling
wiper
assembly
shown
removed
for
clarity
.
System
.
2
.
Remove
complete
dashboard
.
See513
Interior
Trim
.
3
.
Remove
blower
motoras
described
earlier
.
4
.
Remove
nut
retaining
water
hose
flange
to
rear
bulk-
head
.
I'ush
flange
to
one
side
.
See
Fig
.
9
.
Fig
.
9
.
Nut
retaining
coolant
hose
flangeat
bulkhead
(arrow)
.
NOTE-
Clear
any
remaining
coolant
from
the
heater
core
by
blowing
compressed
air
finto
the
coolant
feed
hose
.
HEATER
AND
CONTROLS
0012638b
6
.
Cut
wire
tie
holding
wire
harness
to
heater
box
and
dis-
connect
cable
harness
connector
from
heater
box
.
See
Fig
.
11
.
0012647
Fig
.
11
.
Harness
connectors
(A)
and
cable
tie
(B)
at
heaterbox,
under
driver
side
dash
.
7
.
Followingmanufacturer's
instructions,
connect
ap-
proved
refrigerant
recovery/recycling/recharging
unitto
A/C
system
and
discharge
system
.
8
.
Unbolt
A/C
refrigerantlines
flange
from
engine
bay
bulkhead
.
See
Fig
.
12
.
9
.
On
models
with
rotary-knob
A/C
control
head
:
Discon-
5
.
Remove
nuts
from
heater
box
retaining
bracket
on
en-
nect
wiring
harness
connectors
to
A/C
control
module
gine
bulkhead
left
side
.
See
Fig
.
10
.
Repeat
procedure
in
center
console
and
remove
module
.
See
Fig
.
13
.
for
right
side
nuts
.
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 459 of 759
Fig
.
36
.
6-cylinder
engine
belt
diagram
:
To
remove
A/C
belt,
lever
ten-
sioner
(A)
in
clockwise
direction
using
long-handled
wrench
or
breaker-bar
.
6
.
Disconnect
electrical
harness
connector
from
com-
pressor
.
7
.
Remove
A/C
pressure
hose
and
suction
hose
flange
10
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
bolts
from
compressor
.
Plug
hoses
immediately
See
Recharge
system
following
equipment
manufacturer's
Fig
.
37
.
instructions
.
See
Table
d
.
A/C
System
Refrigerant
Capacities
.
0011879
Fig
.
37
.
A/
C
compressor
pressure
hose
(A)
and
suction
hose
(B)
.
(6-
cylinder
engine
shown
.
4-cylinder
engine
is
similar
.)
HEATING
AND
AIR
CONDITIONING
640-
1
3
Fig
.
38
.
A/
C
compressor
mounting
boits
(arrows)
.
9
.
Installation
is
reverseof
removal
.
CAUTION
-
"
Always
replaceO-rings
when
reconnecting
re-
frigerantfines
.
"
When
installlng
a
new
compressor
always
re-
place
receiverldrier
unit
.
Tightening
Torques
"
A/C
compressor
to
engine
block
....
22
Nm
(17
ft-Ib)
"
A/C
line
flange
to
A/C
compressor
5/8
in
.
fine
.
......
.....
....
.
.....
20
Nm
(15
ft-Ib)
3/4
in
.
fine
.......
.....
..........
39
Nm
(29
ft-Ib)
7/8
in
.
fine
...
....
.....
..........
42
Nm
(31
ft-Ib)
11/16
in
.
fine
.....
..
..
..
...
.
.....
48
Nm
(35
ft-Ib)
A/C
Compressor
Clutch
The
compressor
clutch
can
be
replaced
without
disturbing
thesealed
refrigerant
system,
although
clearances
in
the
six-
cylinder
cars
may
be
very
tight
.
Detach
the
compressor
from
the
compressor
bracket
togain
extra
clearance
.
8
.
Remove
compressor
mounting
boits
.
See
Fig
.
38
.
Re-
Typical
A/C
compressor
and
clutch
is
shown
in
Fig
.
39
.
move
compressor
by
pulling
downward
from
under-
neath
car
.
Remove
driveplate
and
pulley
to
access
clutch
magnetic
winding
.
See
Fig
.
40
.
AIR
CONDITIONING
Page 461 of 759
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
Page 480 of 759
721-
4
AIRBAG
SYSTEM
(SRS)
CAUTION-
A
new
contact
ring
is
held
in
center
position
with
a
screw
.
This
locking
device
must
be
removed
after
contact
ring
is
installed
on
steering
wheel
.
See
Fig
.
4
.
Latercars
(1994
on)
:
"
Connect
ground
lead
at
contact
ring
.
"
When
installing
a
new
contact
ring
from
BMW,
remove
locking
pin
after
installing
contact
ring
to
steering
wheel
.
See
Fig
.
5
.
Airbag
crash
sensor,
replacing
Fig
.
5
.
Airbag
contact
ring
locking
pin
(arrows),
as
installed
on
new
replacement
part
from
BMW
(later
production
cars)
.
Contact
ring
mountíng
screws
shown
at
A
.
CAUTION-
Anew
contact
ring
is
held
in
center
position
with
a
screw
or
pin
.
This
locking
device
mustbe
removed
after
contact
ring
is
installed
on
steering
wheel
.
See
Fig
.
5
.
The
airbag
system
in
cars
produced
through
1993
uses
two
crash
sensors
mounted
in
the
engine
compartment
on
the
left
and
right
wheel
arches
.
The
sensors
are
identified
by
their
or-
ange
color
.
WARNING
-
If
en
airbag
is
deployed,
both
sensors
must
be
re-
placed
.
1
.
Disconnect
negative
(-)
cable
from
battery
and
cover
negative
terminal
with
insulating
material
.
CAUTION-
Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautíons
given
at
the
front
of
thls
manual
on
page
viii
.
AIRBAG
SENSORS
AND
ELECTRONICS
2
.
Remove
lower
steering
column
trim
mounting
screw
and
remove
lower
trim
.
See
Fig
.
6
.
Fig
.
6
.
Lower
steering
column
retaining
screw
(arrow)
.
3
.
Remove
orange
SRS
connector
from
its
holder
and
carefully
separate
connector
.
See
Fig
.
7
.
Fig
.
7
.
Orange
SRS
connector
below
steering
column
(arrow)
.
4
.
Working
in
engine
compartment,
remove
anti-tamper
Torx
screwsfrom
crash
sensor
.
Remove
sensor
and
disconnect
harness
connector
.
See
Fig
.
8
.
5
.
Installation
is
reverse
of
removal
.
Make
sure
arrow
on
sensor
faces
forward
when
installing
sensor
.
WARNING
-
Once
the
airbag
unit
is
installed
and
all
other
ser-vice
procedures
have
been
completed,
start
the
en-
gine
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
byen
authorized
BMW
dealer
.
0012543
0011891
Page 482 of 759
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
.
Page 486 of 759
ELE--2
ELECTRICAL
WIRING
DIAGRAMS
FUSE
LINK
64766
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1
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6
END
INECONTROL
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TRANSMISSION
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DATALINK
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RELAY
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(EGS)
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I
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5
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FUELPUMP
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1993W/TRUNK
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1993W/ENGINE
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1993W/TRUNK
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WI
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6OF7)
>I
mJ~CANADA
RED
BNUMPSTART
JUNCTION
POINT
REO
Power
Distribution
1992-93
318i
Only
(1
of
7)
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POINT
TOFUSEF15
TO
FUSE
F29
(DIAGRAM60F7)
(OIAGRAM6OF7)
I
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.
FUEL
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I
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~
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GENERATOR
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I
,(
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(4CVL)
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RED
RED
ON-BOARD
LEFTPOWERRIGHTPOWERLEFTPOWER
TOFUSEF17
COMPUTERHORN
WINDOWMODULE
WINDOWMODULE
WINDOW
MODULE
(DIAGRAM
60F
7)
RELAY
TO
COMFORTRELAV
Page 493 of 759
ELE
Power
E
1994-95
Exc
JMPSTART
B+JUMP
START
C710NPOINT
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REO
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RAM
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Page 498 of 759
ELE-14
ELECTRICAL
WIRING
DIAGRAMS
BATTERY
FUSE
LINK
REDRED
RED
RED
RED
1997
S
.JUMPSTART
JUNCTION
POINT
1996W/TRUNK
MOUNTED
BATTERY
----
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¢
¢
¢
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BATTERY
1996&1997
3181,3181
.,
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(DIAGRAM
2OF5)
MODULE
BATTERY
1997M3
&328i.32811,3281
CONVERTIBLE
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M3
&3281
.
3281
..
3281
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1996
W/ENGINE
1996
W/TRUNK
1997
1996
W/ENGINE
1996
WITRUNK
COMPTMOUNTED
MOUNTED
COMPTMOUNTED
MOUNTEDC
BATTERY
BATTERY
BATTERY
BATTERY
REDREDRED
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START
JUNCTION
POINT
Power
Distribution
1996-97
Except
318ti
(1
of
5)
RED
RED
RED
I
I
T=
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JU
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1997M3&3281,3281
.,
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3181.3181x,BC
3181CONVERTIBLE
Page 547 of 759
SPIN
HOT
IN
RUN
RED
F
-
i
B4
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JUNCTION
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1992-93
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