1996 BMW 318i Ventilation

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

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

rower

1992-

FROMFRONTPOWEn
REO
DISTRIBUTION
BOX



E
(DIAGRAM
1
&20F7)
FROM
FRONT
POWER



RED
DISTRIBUTION
BOX
D
F=eNT^nOW~^R~



RED
(DIAGRAM1&20F7)
RED



FROM
FRONT
u



~
nm~n

10



20



6



18I
FROM
FRONT
POWER



PED
DISTRIBUTION
BOX



1993



1992
(DIAGRAM/
&20F7)
1993



1892

BLOWER
RELAY



B



6



4

I
-
I



I



I



I



I



I



II



I



I



I



I



I

RIGHTSEAT



LEFTSEAT



HEADLIGHT/



2S
CoNTROLSWITCH



CONTROLSWITCH



FOOLIGHTCLEANING
No
DULE(SPA)



NOTUSED



I



I
(CANADA)
I



I
D
FROMFRONTFOG



RED/YEL



FROMLOWBEAM



YEL



PARK
HEATINGLIGHTRELAY
L



LIGHTRELAY
M



VENTILATION
--
(DIAGRAM/&20F7)
~


--
-
(DIAGRAM/&20F7)
~



RELAY
BOX
1B



g



1
-



-



-



-



--
I
FRONTPOWER
I
DISTRIBUTION
BOX
FUSE



FUSE



FUSE



FUSE
I
F20



F16



F12



F11
30A
-___________________
16A---__---



7
.5_______



7
.5=~

20



10



_
4
-



_



_

O
O
1992
OR
1993W/O
PARK



1993W/PARK
VENTILATIONVENTILATION

GRNIBRN
WIOCCM



W/C
CM



W/CCM



W/OCCM
O



mY



>

i7



8



16



86



e
1.
Z
M
za



>



I
-
I-


r-___-

I
-
(-)



(_)



II



III



I
I
II



I



I



I



-



G



!____



_J



!
_I
FOGLIGHT



FOG
LIGHT



INSTRUMENT



LEFT
LOW



CHECKCONTROL



RIGHTLOWBLOWER



BLOWER



PARK
HEATING



CLUSTER



BEAM
HEADLIGHT



MODULE



BEAM
HEADLIGHT
RELAYRELAY
VENTILATION



CANADA
RELAY
BOX
FROMFRONTFOG
YELIBLK
LIGHTRELAV
V
(DIAGRAM
l
&2
OF
7)
FROMFRONTP0
ER



REDDISTRIBUTIONBOX
H
(DIAGRAM
1
&2
OF
7)
FROMFRONTPOWER
RED



FROMHIGHBEAM
REDIWHT
DISTRIBUTION
BOX



LIGHTRELAY
K
(DIAGflAMi&20F7)



,



---------



------
_
-_---



--
(DIAGR=M1&20)=7)~
-
21



17



13



1
FRONTPOWER
I
DISTRIBUTIONBOX
I
FUSE



FUSE



FUSE



FUSE



FUSE
I
I
F41



F39



F17



F30



F28
I



7.BA
-_--
_-
_____



10A
-_____



7
.BA-____



7
.0=
------------



-~

2z



2z



1a



zD



1B
>



CANADA
t¢
7



>
3



;

e

Z



F_

6



2



2



2

II



I
I



I
I



II



III



I



I



I



I



I



I



I



I



I

HIGHS
PEED



COMPRESSOR



REARFOG



RIG
THIGH



LEFTHIGH
RELAY



CONTROL



LIGHTSWITCH



BEAM
LIGHT



BEAM
LIGHT64849



RELAY

FROM



FROM



FROM



FROM
ER



FROMRED



RED



RED



RED



RED
FRONT
POWER
B



FRONTPOWER
C



FRONT
POWERD



FRONT
POW



E



F
FRONTPOWER
DISTRIBUTION
BOX



O'S
TRIBUTIONBOX
~



DISTRIBUTION
BOX



DISTRIBUTION
BOX



DISTRIBUTION
BOX
(DIAGRAM
IOF5)



19



(DIAGRAM
IOF5)



91



-
(DIAGRAM
IOF5))
---
9
'



-
(DIAGRAM
101S)



17
---

F



a
(DIAGRAM
IOF5)
-

GRN/BRN
OR
RED/GRN

FUSE
F20



FS
30A



30A
---------------
------------

W/O
PARK



I



W/PARK
VENTILATIONVENTILATION
5

I



_I
I



I



_I
I



L
_J
I
!
BLOWER
BLOWER
PARKHEATING
RELAY
RELAY
VENTILATION
RELAYBOX

LI
401



i5_A



J
_____________I_
RED/I



RED/GRY/
GRN



YEL

CONTROL
ASSEMBLY

FROM
FRONTPOWER
DISTRIBUTION
BOX
(DIAGRAM
1
OF5)

RED
FROM



RED
FROM
Y
FRONTPOWER



X
FRONT
POWER
DISTRIBUTION
BOX



DISTRIBUTIONBOX
(DIAGRAMIOF5)(DIAGRAM10F5)
FUSE



FUSE"
AUXILIARY
F4B



F47
PUSEBOX

I-
-
LEFI
HIGHSPEED



ON
BOARD



ANTI-THEFT



HORN
RELAY



FOG
LIGHT



FOGLIGHT



INSTRUMENT



LEFTLOW



CHECKCONTROL



RIGHTLOW
RELAY



COMPUTER



CONTROLMODULF



CLUSTER



BEAM
HEADLIGHT



MODULE



BEAM
HEADLIGHT
(1995)



(1994)

ELECTRICAL
WIRING
DIAGRAMS
ELE-13

Power
Distribution

1994-95
Except
318ti
(5
of
5)

-
-
-
FRONTPOWER
FUSE



iFUSE



FUSE



USE



DISTRIBUTION
BOX
F40



F3



FID
I
SPA



30A



301
--
___-_________

III

RIGHTSEAT



LEFTSEAT



HEADLIGHT/



RELAY
Co
NTROLSWITCH



CONTROLSWITCH



FOGLIGHTCLEANING



MODULE
MODULE
(SPA)
(CANADA)

FROM



FROM
FRONT
FOG



L



RED/YEL



LOW
BEAM
M



YEL
LIGHT
RELAY



LIG
HT
RELAY
(DIAGRAM
1OF5)~111



-



(DIAGRAMlOFS)
-

15A



7
.SA



L7
.SA
---------------------
-

W/OCCM



W/CCM



W/CCM



I



W/O
CCM

CANADA

4



2
YEL/RED



YELIGRY
OR



OR
YEL/BLU
I



YEL/GRN

FIR
"M
FRONTPOWER
H
RED



+
YEL/BLK



V
FROM
FRONTFOG
DISTRIBUTION
BOX



LIGHT
RELAY
(DIAGRAM
1
OF5)



(DIAGRAM
1
OF
5)

I
r



I
F-
,
I



I



I



I



I



I

FROM
HIGH
BEAM
X



RED/WHT
LIGHT
RELAY
(DIAGRAM
1
OF
5)
131

I



I



HIGH
SPEED



COMPRESSOR



REARFOG



RIGHTHIGH



LEFTHIGH
I_
_
I



RELAY
CONTROL
LIGHTSWITCH
BEAMLIGHT
BEAMLIGHT
RELAY
SUNROOF

,FRONTPOWER
I
DISTRIBUTION
BOX

88989

FROM1~
RED
FRONT
P
.
DISTRIBUTIONBO
I/
X
(DIAGRAM
2
OF
5)
B

I



I



I



I
I



I



I



I



I



I
L
-1
BLOWER



PARK
HEATING



BLOWER
RELAY
VENTILATION
RELAYRELAY
BOX
FROM
IGNITION



GRN
SWITCH
L
(DIAGRAM
30F5)
7

OR
RED/GR
.
I



.,

1997
OR
1DSSW/OPARK
11998W/PARK
VENTILATIONVENTILATION

FROM
IGNITION



K



SRN
SWITCH
(DIAGRAM
3
OF
5)
-------------
FUSE



FUSE
F20



F28
30A



5A

Power
Distribution

1996-97
Except
318ti
(4
of
5)

AUTOMATIC
TRANSMISSION
RANGE
S
W
ITCH

ELECTRICAL
WIRING
DIAGRAMS
ELE-17

FROM
IGNITION
~



GRN
SWITCH
(DIAGRAM
3
OF
5)
-
-
-
-
FRONTPOWER
FUSE



DISTRIBUTION
BOX



r-



_1
AUXILIARY
,IS



I



I



FE
7
E



I
FUSE
BOX
5
__~



L_
1
_
5
=J
I



-_______-___
~



--_____-___

iml



REO/GRY/
.FN/N



YEL

FROM(~
RED
FRONTPOWER
II
J-
DISTRIBUTION
BOX
(DIAGRAM
2
OF
5)

B



6B
I



I



I



I



I



I



I



I



I



I



I



II
_



1-1
I
__
I
1-1



I
__I
1____l
COMPRESSOR



NORMAL



HIGH



ANTI-THEFT



HORN
RELAY
CONTROL



SPEED



SPEED



CON
TROLMODULE
RELAYRELAYRELAY

MIRROR



LIGHT



HIGH
BEAM



REVERSING



AUTOMATIC



PROGRAM



THROTTLE



SERVOTRONIC



INSTRUMENT
CONTROL
SWITCH
LIGHT



LIGHTSWITCH



TRANSMISSION
SWITCH
FLAP
CONTROL
CLUSTER
SWITCH



RELAY



RANGESWITCH



HEATER
MODULE
(1996)(1996)

L
-I



L-1



L-1



!
_I



L-1



L
-I



L-1



L-1



L-1



L-1



!
_I



L-1



L-1
AUTOMATIC



THERMOSTAT



WATER



COMBINATION



INSTRUMENT



REAR



MULTI-



UNLOADER



SLIPCONTROL



LIGHT



AEC



ABSSLIP



ASS
RELAY
CLIMATE



VALVE



SWITCH



CLUSTER



DEFOGGER



FUNCTION



RELAY



MODULE
(ABS)



SWITCH



SWITCH



CONTROLCONTROL



ASSEMBLY



RELAYCLOCK



(1996)



MODULEMODULE

_1S96

ELE-22

ELECTRICAL
WIRING
DIAGRAMS

GRNIBLU
Wl

WIO

AUTO

AUTO

CLIMATE

GEN/YELT
CLIMATE

CONTROL

CONTROL

10437
3

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