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
FP
OM~
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DISTRIBUTION
BOY%
(DIAGRAM
2
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S
FROMIGNITION
GRN
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1
(DIAGRAM30F5)
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I
FUSEF23
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I
DISTRIBUTIONBO%
I
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40F5)
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FUSE
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PARKHEATING
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AUTOMATIC
COMPRESSOR
NORMAL
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RELAY
TRANSMISSION
CONTROL
SPEEDSPEED
RELAYBOX
RANGESWITCH
RELAY
RELAYRELAY
(W/PARK
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X7002B
Power
Distribution
1998
Except
318ti
(4
of
5)
"
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ROLLOVER
MIRROR
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LIGHT
DAYTIME
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INSTRUMENTSENSOR
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RUNNING
LIGHTSWITCH
TRANSMISSION
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THERMOSWITCH
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MODULE
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41
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DISTRIBUTION
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I
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SLIP
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SWITCH
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MODULE
L
ASSEMBLY
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MODULE
HYDRAULIC
MODULE
UNIT
84318
ASS
FRONT
REAR
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DRIVER'S
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DOME/
SWITCH
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PASSENGER'S
DRIVER'S
FRONT
DRIVER'S
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DOORDOOR
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SUNROOF
SPATIAL
WASHER
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SIDE
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SOUND
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MIRROR
MIRROR
BELTCO
.TPOLMOOULESENSOR
MIRRORSWITCHHEATER
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MODULE
ASSEMBLY
SWITCH
ASSEMBLY
(1996)
MODULE
SWITCH
SWITCH
SWITCH
r
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-
7
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F-
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ELECTRICAL
WIRING
DIAGRAMS
ELE-55
Ground
Distribution
1995-96
318ti
(2of3)
BE
.
PASSENGER'S
WIPER/
CRUISE
BODY
SEAT
PASSENGER'S
PASSENGER'S
CRASH
WASHER
ON-BOARD
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ELECTRONICS
CONTROL
SEAT
SEATBACK
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MODULE
COMPUTER
ACTUATOR
CONTROL
CLUTCH
SWITCH
HEATER
HEATER
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MODULE
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MODULE
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MODULE
SWITCH
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12
INCLUS
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,
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I
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(1996)
FRESH
INTEGRATED
CLIMATE
AIR/
HEATING/
GLOVE
HEADLIGHT/
TRANSMISSION
CONTROL
IRKS
RECIRC-
CLIMATE
EVAPORATORTEMPERATURE
BOX
ANTI-
FOGLIGHT
ENGINE
POSITION
BLOWER
SWITCH
CONTROL
ULATION
CONTROLTEMPERATUREWHEEL
LIGHTTHEFT
HAZARD
CLEANING
HOOD
INDICATOR
MOTOR
ILLUM
SWITCH
MOTOR
MODULE
SENSOR
SWITCHSWITCH
HORN
SWITCH
MODULE
SWITCH
LIGHT
I
1
I
1
I
1
I
i
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1
I
1
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BEN
SUPPLEMENTAL
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FRONT
DRIVER'S
PASSENGER'S
DRIVER'S
PASSENGER'S
RESTRAINT
REARFRONTTAPE
CIGAR
FRONT
POWERPOWER
SEATSEAT
SYSTEM
ASHTRAY
ASHTRAY
PLAYER
LIGHTER
CIGAR
TELEPHONE
PROGRAM
WINDOW
WINDOW
HEATERHEATER
CONTROL
LIGHT
LIGHT
LIGHTLIGHT
LIGHTER
EJECTBOX
SWITCH
SWITCH
SWITCHSWITCH
SWITCH
MODULE
BEN
-1
G201
7
G302
1
W/ONBOARDCOMPUTER
II
F
-,
I
I1
-
7
F-
1
I
I
I
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I
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L
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L
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1
G303