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-150
ELECTRICAL
WIRING
DIAGRAMS
JA
HOTATALLTIMES
HOTAT
HOTINRUN
HOTINACCY,
ISWIT
H
NALLTIMES
-
ALLSTART
RUNANDSTART
I
F
USEFUSE
1
FRONTPOWER
LOCK
START
F45
I
P46
I
DISTRIBUTION
I
FUSE
FUSE
1
I
BOX
ACC
*
RUN
IF31
F28
(199631811)
/(EXCEPT
~Y'J
I
I
A
JIA
----
7'5A
T
6318H)
STARTING
,
SYSTEM
93580
93583
/
J
AUTOMATIC
GRNISLK
1
.~
I
I
TgqNSMISSION
I
RANGES
WITCH
I
(OOPF(LOW))
(1
ON
(HIGH))
RED/GRN
GRN/GRS~
VIOIYELI
DATA
LINK
20
WHTIVIO
CONNECTOR
,
1
2
WHTIVIO
f
3~
GRN/BLN
~4
GRN
~5
REDIGRP
BLKIYEL
ELECTRONIC
IMMOBILIZER
CONTROL
MODULE
7BRN
~
BR~B
BlK/GRN
~9
BR
NIBLK
X10f
it
i}
2
BLK
13
BL
S
U
X
16
BLUIRED/VEL
~15_
.
BLK/GRN
X1659
RED/GRNIGRN/GRYI
VIOIYEL
DATA
LINK
20_W_HT1VI0
_
CONNECTOR
STARTING
,
SYSTEM
Anti-Theft
1995-98
EWS
II
TRANSMISSIONS
SYSTEM
BLK
I
BLK/VIO
BRN/
BLK
I
1
BLKYEL
TRANSMISSIONS
2
WHT
VIO
SYSTEM
3
GRNIBLK
(A/TONLY)
d
GRN
-
~
5
flE0
GRN
END
NECONTROL
MODULE(DME)
H
TAATALLTIMES
HOTAT
HOTINRUN
HOTINACCY,
---7IGNITIONALLTIMES
ALLSTART
RUNANDSTART
AUTOMATIC
GRN/BLK
I
I
TRANSMISSION
I
I
RANGESWITCH
L
I
(A/T)
STARTER
(A/T)
7T
IMMOBILIZATION
(MIT)2I
SWITCH
(MIT)
MODULE
ENGINECONTROL
r--__--
MOOULE(OME)
EXCEPT
3188
NCA
NCA
2
IGNITION
SWITCH
I
NCA
7
X
90260
B
RN/ORG
3
VIOIYEL
2
BLU
1
=
I
TRANSMITTER
MODULE
(EWS
II)
BODY
ELECTRONICS
CONTROL
MODULE
(ZKE
IV)
BLK/GRN
1
,I
I
ON-BOARD
COMPUTER
G203~
6201
-
TRANSMITTER
MODULE(EWSII)
BLUIRED/YEL
,
BLUIG
FIN10~I
-
I
ANTI-THEFT
CONTROL
MODULE
(ALPINE)
6
,7BLKRN
"
6R=--,+G202
®
)9
RN
BLK
.X
10184
I
I
X
10
"
BLU/RED/YEL
4
I
I
11
32i
`
X
l
_
12
BL~
BO
.YELECTRONICS
X13
BLU
EXCEPT
CONTROL
MODULE
(ZKE
IV)
3186
~14
BLU
RED/YEL
__
_
15
BLK
GRN
BLK/GRN
1
I
X
16so
I
GRN(OR
BLK/GRN
15
IMMOBILIZER
BOI
1'8r-28
.M3
ELECTRONIC
BLK(
BLK/VIO)
ON-BOARD
COMPUTER
8299
1
/~
EXCEPT
BRAKE
~J
1997
FLUID
IND
A23
~
.
A16
I
I
SRS
IND
A17
81
18
B
B24
J,
CHARGE
PARK
IND
BRAKE
IND
CHECK
ENGINE
IN.
LEFT
TURN
IND
RIGHT
TURN
IND
1997
ONLY
FUEL
CONSUMPTION
METER
CHECK
IND
SEAT
FRONT
BELT
10
.
LT
INDIND
HIGH
BEAM
IND
FUEL
RESERVE
IND
FUEL
GAUGE
ILL
UM
A22
25
~
(3
USED)
EXCEPT
y
28
7992
TEMPGAUGE
INSTRUMENT
CLUSTER
InstrumentPanel
1992-97
Except
318ti
(1
of
2)
B
-ELECTRICAL
WIRING
DIAGRAMS
ELE-165
HOTATALLTIMES
________
HOT
IN
RUNAND
START
HOTATALLTIMES
IGNITION
r
FUSE
FUSE
I
FRONT
UTION
I
(SWITCH
F21
~F31
DISTRIB1000%
LOCK
START
LOCK
START
LL
I
5
_A
_-__-
ACC
RUN
ACC
RUN
14
2
L---
-------
-
-
OR
N1
RED/
T
V
YEL
11
EXCEPT
2
lo
GRN
1997
VIO
RED/WHT
1
(ORWHT)
2
GRYIRED
3
BLU/BRN
4
BLU/GRN
5
GRVIBRN
BS
7
CONVERT-
8
ISLE
ONLY
HEADLIGHTS
SYSTEM
INTERIOR
LIGHTS
SYSTEM
EXTERIOR
LIGHTS
SYSTEM
EXTERIOR
LIGHTS
SYSTEM
TRANSMISSION
SYSTEM
EXTERIOR
LIGHTS
SYSTEM
9
I
iw
.TIBLU
POWERTOPSSYSTEM
11
WHT/YEL
12
WHT/VIO
13
BRN/RED
14
BLU/BLK
15
VIO
16
GRY
-
ENGINE
CONTROLS
SYSTEM
17
BRN/GRN
18
BAN
/Vlo19
YEL
20
BLK
ENGINE
CONTROLS
SYSTEM
A79
21
WHT/BLK
22
RED/YEL
814
23
GRNIVIO
24
BRNIORG
SUPPLEMENTAL
RESTRAINTS
SYSTEM
SPEEDOMETER
816
CONNA
1
WHTIRED
B4
~2
BLK/WHT
ROLLOVER
33
8R~N
PROTECTION
IND
B17
4
GRN/BLU
(CONVERTIBLE)
5
GRIN
TACHOMETER
B18
6
BLU
STARTING/
7
CHARGINGSYSTEM
A20
8
YELIBRN
B
-K/FED
10
WHTIGRY
11
GRYIBLK/YEL
12
BL
LISP
N13
GRN/PED
14
BLU/VIO/YEL
15
WHT/GRN
89
16
VIO/YEL
BRN
"
~I
G202
17
BRNIYEL
GRY/BLK,
BFN
15
18
BN/VIO
VEL
B
ANT
19
BRNIGRN
1997
LOCK
~`r~i
j
W/OASCW/ASO
83
20
GRYIBLK/VEL
ONLY
SYES
4
STEM
GRV/BLK/VEL
21
(ORBRN)
(ORBRN)
22
BLU/BLK
23
BRN/GRV/VEL
BRNIGRVIVEL
19
BRN/GRV
OR
BRN/GRN
HEADLIGHTS
SYSTEM
BODYCOMPUTER
SYSTEM
ANTI-LOCK
BRAKESSYSTEM
ANTI-LOCK
BRAKESSYSTEM
(EX
1992
A1993)
ENGINE
CONTROLS
SYSTEM
(1997
ONLY)
BLU/VIO/YEL
J
EXCEPT
1
.92
.
1993
BIN/
VIO
BRN/GRN
11
OIL
[
._~]
PARK
RA11FL11
AL.^
SWITCH
I
PRESSURE
BRAKE
LEVELSW
U
ITCH
SWITCH
111
G202
GROUND
GROUND
REDIYELRED/YELRED/YEL
WHTIYEL
WHT/VIO
BRN/RED
YEL
GRN/BLU
BLKIWHTBRN/BLK
BLK/RED
WHTIGRN
VIO/YEL
BRNIYELBRN/VIO
BLU/BRNIYEL
BRN/YEL
e9
0
11
1213
141516
WARNING
Your
common
sense,
good
judge-
ment,
and
general
alertness
are
cru-
cial
to
safe
and
successful
service
work
.
Befcre
attempting
any
work
on
your
BMW,
read
the
warnings
and
cautions
on
page
vi¡
and
the
copyright
page
at
the
frontof
the
manual
.
Review
these
warnings
and
cautions
each
time
you
prepare
to
workon
your
BMW
.
Please
also
read
any
warnings
and
cautions
that
accom-
pany
the
procedures
in
the
manual
.
Door
glass
See
Door
windows
Door
windows
general
information
512-1
front
door
window
(2-door
models)
adjusting
512-7
removing/installing
512-5
front
door
window
(4-door
models)
initíalizing
512-1
removing/installing
512-2
rear
door
window
(4-door
models)
removing/installing
512-4
fixed
glass,
removing/installing
512-
4
rear
vent
window
or
vent
latch,
replacing
(2-door
models)
512-11
window
regulator
and
motor,
removing/installing
512-12
window
regulator
service
512-12Doorcheck
See
DoorsDoor
handle
See
Centrallocking
and
anti-theft
Door
panel
See
Doors
Doors
general
information
411-1
door
adjustment
411-2door
check,
replacing
411-2
door
panels
411-3
doors411-1
front
orrear
door,removing/installing
411-1
front
door
panel,
removing/installing
411-3
rear
door
panel,
removing/installing
411-4
rearsidepanel,
removing/installing
(two-door
model)
411-4
Drive
axle
See
Rear
suspension
Driveability
troubleshooting
See
Engine-general
Driveshaft
general
information
260-1
center
bearing
assembly,
replacing
260-6
driveshaft,
aligning
260-3
driveshaft,
installing
260-4
Driveshaft
(cont
.)
driveshaft,
removing260-4
driveshaftservice
260-3
flex-disc,
replacing
260-5
front
centering
guide,
replacing
260-7
guibo
See
flex-disc
troubleshooting260-1
ECM
(engine
control
module)
pin
assignment
See
Fuel
injection
Electrical
circuit
See
Electrical
system-general
Electrical
component
locations
general
information
610-1
auxíliary
relay
panel
610-2
component
location
table
610-9
component
locations
610-3
fuse
position
tables
610-19
fuse
positions
610-1
relay
positions
610-2
splice
panel,
left
610-2
splice
panel,
right
610-3
Electrical
system-general
general
information
600-1
continuity,
checking
600-5
electrical
test
equipment
600-2
safety
precautions
600-1
short
circuits
600-5
short
circuit,
testing
with
ohmmeter
600-6
short
circuit,
testing
with
voltmeter
600-6
troubleshooting
600-3
voltage,
measuring600-4
voltage
and
polarity
600-1
voltage
and
voltage
drops
600-4
voltage
drop,
testing
600-4
wiring
codes
and
abbreviations
600-2
wiring
diagrams
600-2
wiring,
fuses
and
relays
600-1
Electrical
wiring
diagrams
general
information
ELE-1
wiring
diagrams
ELE-2
ABS
ELE-117
ABS/AST
ELE-120
airbag
(supplemental
restraint
system)
ELE-140
air
conditioning
and
heating
ELE-
129
anti-theft
(Alpine)
system
ELE-144
anti-theft
(EWS
II)
ELE-150
body
computer
module
ELE-176
charging
system
ELE-67
convertible
top
ELE-253
cruise
control
ELE-112
data
link
connector
ELE-86
engine
cooling
ELE-94
engine
management
ELE-70
exterior
lights
ELE-194
ground
distribution
ELE-35
headlights/foglights
ELE-180
INDEX
3
Electrical
wiring
diagrams
(cont
.)
heated
seats
ELE-245
horns
ELE-153
instrument
panel
ELE-165
interior
lights/illumination
ELE-211
lumbar
control
ELE-247
on-board
computer
ELE-173
park
ventilation
ELE-139
power
distribution
ELE-2
power
door
locks
ELE-226
power
mirrors
ELE-241
power
seats
ELE-243
power
sunroof
ELE-248
power
windows
ELE-231
radio/cassette/CD/speakers
ELE-
255
rear
window
defogger
ELE-160
shift
interlock
ELE-110
starting
ELE-63
transmission
electronics
ELE-96
warning
systems`
.
chimes
ELE-178
wiper/washer
ELE-154
Emergencies
See
Fundamentals
for
the
do-it-
yourself
owner
Engine-general
general
information
100-1
air
flow
measurement
and
vacuum
leaks
100-12
basic
engine
settings
100-11
basic
requirements
100-11
battery
voltage
100-12connecting
rods
and
pistons
100-1
cooling
system
100-5
cylinder
block
and
crankshaft100-1
cylinder
compression,
checking
100-6
cylinder
head
and
valvetrain
100-2
DISA
(dual
resonance
intake
system)
100-3,130-3
driveability
troubleshooting
100-8
engine
management
system
100-3
fuel
delivery
100-5
fuel
supply
100-14ground
connections
100-13
ignition
100-5
lubrication
system100-5
mechanical
troubleshooting
100-5
on-board
diagnostics
(OBD)
100-8
oxygen
sensors
100-11
preventive
maintenance
100-11
VANOS
(variable
valve
timing)
100-2warningsand
cautions
100-5
wiring
andharness
connections100-
13Engine
control
module
(ECM)
See
Fuel
injection
Engine
removal
and
installation
general
information
110-1
engine,
removing/installing(4-cylinder
engines)
110-1
engine,
removing/installing
(6-cylinder
engines)
110-4
Engine
coolant
temperature
(ECT)
sensor
See
Fuel
injection
Engine
hood
See
Fenders,
enginehood