connector rear BMW 325i 1992 E36 Manual PDF

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

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

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
.

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

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

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

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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