1998 BMW M3 ABS

510-4



EXTERIOR
TRIM,
BUMPERS

Fig
.
8
.



Bumper
cover
retaining
screws
(arrows)
in
left
wheel
weil
.

7
.
Disconnect
harnessconnectors
at
outside
temperature



0013052

sensor
at
rear
of
left
side
of
bumperand
temperatura



Fig
.
9
.



Front
bumper
impact
absorber
mounting
nuts
(A)
and

switch
at
rear
of
right
side
of
bumper
(if
applicable)
.



bumper
bracket
hardware
(B)
.

8
.
Slide
bumper
straight
off
sida
brackets
.

9
.
Installation
is
reverse
of
removal,
notingthe
following
:



When
removing
and
installing
therear
bumper
or
its
compo-

"
Slide
side
brackets
on
bumper
and
body
carefully
to-



nents,
referto
Fig
.
10
.

gether
.

"
Make
sure
tabs
on
trim
strip
engage
slots
in
bumper



1
.
Raise
and
properly
support
vehicle
.

correctly
.

Tightening
Torque

"
Bumper
to
bumper

bracket
(M8
nut)
............
...
.
.
22
Nm
(16
ft-Ib)

2
.
Working
under
bumper,
remove
screws
or
expansion

Front
bumper
impact
absorber,replacing



rivetsat
corners
and
middle
of
lower
bumper
panel
.
Pull

panel
backward,
uncoupling
it
from
bumper
cover
.
See

Thebumper
mounting
bracket
and
impact
absorber
mount-



Fig
.
11
.

ing
hardware
are
accessible
with
the
Font
bumper
removed,
as
described
above
.
See
Fig
.
9
.



3
.
Remove
bumper
cover
expansion
rivets
and
screws
in-

side
left
and
right
rear
wheel
wells
.

NOTE
-

Install
the
bumper
bracket
boltwith
thread
locking
com-
pound
suchas
Loctite
8
270
or
equivalent
.

Tightening
Torques

"
Bumper
bracket
to
impact
absorber

(M10
nut)
.
..
.
...
.............:.
55
Nm
(41
ft-Ib)
"
Impact
absorber
to
chassis
(M6
nut)
...
9
Nm
(7
ft-Ib)

BUMPERS

Rear
bumper,
removing
and
installing

WARNING
-

Make
sure
that
the
car
is
firmly
supported
on
jack

stands
designad
for
the
purpose
.
Place
the
jack

stands
beneath
a
structural
chassis
point
.
Do
not

place
jack
stands
under
suspension
parts
.

4
.
Remove
left
and
right
bumper
bracket
mounting
bolts

and
remove
bumper
.
See
Fig
.
12
.

5
.
Installation
is
reverse
of
removal
.

NOTE-

Install
the
bumper
bracket
bolt
with
thread
locking
com-
pound
suchas
Loctite®270
or
equivalent
.

Fig
.
10
.
Rear
bumper
assembly
.

0013045

Fig
.
11
.
Expansion
rivet
at
corner
of
rear
bumper
lower
panel
(arrow)
.
Some
models
usescrews
.
Pull
panel
backward
to
disengage
from
bumper
cover
.

Tightening
Torque

"
Bumper
bracket
to
impact
absorber

(M10
bolt)
.
..
...........
...
.
..
..
42
Nm
(31
ft-Ib)

EXTERIOR
TRIM,
BUMPERS



510-5

0013047
Fig
.
12
.
Inserttool
through
rear
bumper
mount
bores
to
remove
mounting
bolts
(right
side
shown)
.

BUMPERS

510-
6



EXTERIOR
TRIM,
BUMPERS

Rear
bumper
impact
absorber,replacing

1
.
Remove
bumperas
described
above
.

2
.
Remove
luggage
compartment
floor
covering
.

Fig
.
13
.
Luggage
compartment
floor
panel
fasteners
(arrows)
.
(Left

side
shown
.
Righf
side
is
similar)

5
.
Installation
ís
reverse
of
removal
.

Bumper
height,
adjusting

Tightening
Torques

"
Bumper
bracket
to
impact
absorber

(M10
bolt)
.
............
.
...
..
..
.
42
Nm
(31
ft-lb)

"
Impact
absorber
to
chassis

(M8
nut)
.
.
..........
.
......
.
.
.
.
22
Nm
(16
ft-Ib)

The
adjustment
procedure
given
below
applies
to
either
the

frontor
rear
bumper
.
A
14mm
allen
socket
is
needed
to
make

the
adjustment
.

1
.
Raise
and
properly
support
vehicle
.

WARNING
-

Make
sure
that
the
car
is
firmly
supported
on
jack
stands
designed
for
the
purpose
.
Place
the
jack
stands
beneath
a
structural
chassis
point
.
Do
not
place
jack
stands
under
suspension
parts
.

2
.
Front
bumper
:

"
Remove
bumper
as
described
earlier
.
"
Remove
bumper
bracket
bolt
.
Refer
to
Fig
.
9
.

EXTERIOR
TRIM

3
.
Rear
bumper
:

"
Remove
lower
bumper
panel
as
described
in
Rear

bumper,
removing
and
installing
.

"
Remove
bumper
bracket
mounting
bolt
at
impact
ab-

sorber
.

3
.
Right
side
:
Remove
battery
and
battery
tray
.



4
.
Using
a
12-inch
extension
and
a
l4mm
Allen
socket,

turn
adjusting
collar
clockwise
or
counterclockwise
as

4
.
Remove
fasteners
from
left
or
right
luggage
compart-



needed
to
change
height
of
adjusting
collar
.
See
Fig
.

ment
floor
panels
and
lift
out
panel
.
See
Fig
.
13
.
Impact



14
.

absorber
mounting
nuts
can
now
be
accessed
.

~4

EXTERIOR
TRIM

Ratchet
extension

Adjusting
collar

Impact
absorber,

14
mm
Allen
Socket

Ratchet

0012073

Fig
.
14
.
Adjust
bumper
height
at
threaded
adjusting
collar
in
bumper
impact
absorber
.

5
.
Reinstall
mounting
bolts
and
check
bumper
height
.
Re-

fit
front
bumper
.

Tightening
Torques

"
Front
bumper
to

bumper
bracket
(M8
nut)
......
.
..
.
22
Nm
(16
ft-Ib)

"
Front
bumper
bracket
to

impact
absorber
(M10
bolt)
........
55
Nm
(41
ft-Ib)

"
Rear
bumper
bracket
to

impact
absorber
(M10
bolt)
........
42
Nm
(31
ft-Ib)

Much
of
the
exteriortrim
is
retained
to
the
body
by
plasticclips
and
fasteners
that
may
be
damaged
during
removal
.
Be

sure
to
have
the
necessary
fasteners
onhand
when
removing

exterior
trim
pieces
.

NOTE
-

Sometimes
the
color
of
en
installed
wire
may
be
differ-
ent
than
the
one
on
the
wiring
diagram
.
Don't
be
con-
cerned
.
Just
be
sure
lo
confirm
that
the
wire
connects
lo
the
proper
terminals
.

Wire
color
codes

"
BLU
.........
.
..
..
...
.
.................
Blue

"
BRN
....:....
.
..
..
...
..
...............
Brown

"
YEL
.........
.
..
..
...................
.Yellow

"
GRN
.........
.
..
..
...
.
................
creen

"
G
RY
.......
.
.
.
..
..
.....................
G
ray

"
ORG
.........
.
..
..
...
.
..............
.Orange

"
RED
......
...
.
.
..
.....................
.Red

"
BLK
.........
.
..
..
...
.
................
Black

"
VIO
..........
.
..
...
..
..
.......
.
.......
Violet

"
WHT
.........
.
.
....
.
...
:..............
White

Table
a
.
Terminal
and
Circuit
Numbers

Number



1
Circuít
description

1



j
Low
voltage
switched
terminal
of
coi¡

4



1
High
voltage
center
termina¡
of
coi¡

+x



Originates
atignition
switch
.
Supplies
powerwhen
the
ignition
switch
is
in
the
PARK,
RUN,
or
START
position

15



Originates
atignition
switch
.
Supplies
powerwhen
ignition
switch
is
in
RUN
or
START
position

30



Battery
positive
(+)
voltage
.
Supplies
power
whenever
battery
is
connected
.
(Not
dependent
on
ignition
switch
position,
unfused)

31



1
Ground,
battery
negative
(-)
terminal

50



Supplies
power
from
battery
to
starter
solenoid
when
ignition
switch
isin
START
position
only

+54



Originates
atignition
switch
.
Supplies
power
when
ignition
switch
isin
the
RUN
position
only

85



1
Ground
side
(-)
ofrelay
coil

86



1
Power-in
side
(+)
ofrelay
coil

87



1
Relay
actuatedcontact

D



Alternator
warning
light
and
field
energizing
circuit

ELECTRICAL
SYSTEM-GENERAL
600-
3

Additional
abbreviations
shown
in
the
wiring
diagrams
are

given
below
.

Abbreviations

"
ABS
........
.
...
.
...
.
..........
antilock
brakes

"
A/C
........
.
...
..
..
.
.........
.airconditioning

"
AST/ASC+T
.......
...
.
.
.......
al¡
season
traction

"
CONV
.......
.
.
...
.................
convertible

"
DME
........
.
.
...
.......
digital
motor
electronics

"
ECM



.......
.
...
..
..
.
..
electronic
control
module

"
EWS/EWS
II
......
...
.
.
coded
driveaway
protection

"
SRS
........
.
supplemental
restraint
system-airbag

"
TCM
........
.
..
....
.
transmission
control
module

"
ZKE
(94-98
models)
..
..
.
...
central
body
electronics

"
ZVM
(92-93
models)
...
.
.
..
.
.......
central
locking

ELECTRICAL
TROUBLESHOOTING

Most
terminals
are
identified
by
numbers
on
the
compo-

nents
and
harness
connectors
.
The
terminal
numbers
for
ma-



Four
things
are
required
for
current
toflow
in
any
electrical

jor
electrical
connections
are
shown
in
the
diagrams
.
Though



circuit
:
a
voltagesource,
wires
or
connections
to
transport
the

many
terminal
numbers
appear
only
once,
severa¡other
num-



voltage,
a
load
or
device
that
uses
the
electricity,
and
a
con-
bers
appear
in
numerous
places
throughout
the
electrical
sys-



nection
to
ground
.
Most
problemscanbefound
using
a
digital

tem
and
identify
certain
types
ofcircuits
.
Some
of
the
most



multimeter
(volt/ohm/amp
meter)to
check
for
voltage
supply,

common
circuit
numbers
are
listed
below
in
Table
a
.



for
breaks
in
the
wiring
(infinite
resistance/no
continuity),
orfor

a
path
to
ground
that
completesthe
circuit
.

Electric
current
is
logical
in
its
flow,
always
moving
from
the

voltage
sourcetoward
ground
.
Electricalfaults
can
usually
be

located
through
a
process
of
elimination
.
When
troubleshoot-

ing
a
complex
circuit,
separate
the
circuit
into
smaller
parts
.

The
general
testsoutlined
below
may
be
helpful
in
finding

electrical
problems
.
The
information
is
most
helpful
when

used
with
the
wiring
diagrams
.

Be
sure
to
analyze
the
problem
.
Use
the
wiring
diagrams
to

determine
the
most
likely
cause
.
Getan
understanding
of
how

the
circuit
works
by
following
the
circuit
from
groundback
to

the
power
source
.

When
making
test
connections
at
connectors
andcompo-

nents,
use
care
to
avoidspreading
or
damaging
the
connec-

tors
or
terminals
.
Some
tests
may
require
jumper
wires
to

bypass
components
or
connections
in
the
wiring
harness
.

When
connecting
jumper
wires,
use
bladeconnectors
at
the

wire
ends
that
match
the
size
of
the
terminal
being
tested
.
The

small
interna¡
contacts
are
easily
spread
apart,
and
this
can

cause
intermittent
or
faultyconnections
that
can
leadto
more

problems
.

ELECTRICAL
TROUBLESHOOTING

610-2



ELECTRICAL
COMPONENT
LOCATIONS

Fuses
number47
and
50are
mounted
on
the
left
side
splice

panel
.
Refer
lo
Fig
.
5
.

Fuse48
is
mounted
on
the
auxiliary
relay
panel
.
Refer
to

Fig
.
3
.

Fuse
49
is
mounted
in
the
right
side
of
the
luggage
compart-

ment
behind
the
trim
cover
.

Relay
Positions

Mounted
in
the
left-hand
rear
comer
of
the
engine
compart-

ment,
the
power
distribution
box
contains
46
(uses
and
15
re-

lay
positions
.
See
Fig
.
2
.

Fuses31-46

-
Er
a
&QT
MM
~

Fig
.
2
.



E36
front
power
distribution
box
.

FUSE
AND
RELAY
POSITIONS

Fuses1-20

13
EL1
5
]

mmmmmmmmmm
Fuses
21-30
--



0013034)

1
.
Fuel
pump
relay



9
.



Heater/A/C
Blower
relay
2
.
System
(main)
relay



10
.



Rear
defogger
relay
3
.
Oxygen
sensorheater
re-



11
.
ABS
system
relay
lay



12
.
ABS
pump
relay
4
.



Horn
relay



13
.



High
speed
radiator
fan
re-
5
.



Taillight/foglight
relay



]ay
6
.
Low
beam
relay



14
.
A/C
compressor
relay
7
.



High
beam
relay



15
.



Low
speed
radiator
fan
re-
8
.



Emergency
flasherrelay



¡ay

Auxiliary
Relay
Panel

The
auxiliary
relay
panel
contains
five
relay
positions
.
In
lat-

er
modeis
an
additional
fuse
holder
(Fuse48)
and
the
EWS
II
(anti-theft)
transmitter/receiver
module
are
located
on
this

panel
.
See
Fig
.
3
.

The
panel
is
located
nextto
the
steering
column
under
the
driver's
side
dashboard
.
To
access
this
panel,
remove
the
pwer
dash
panel
on
driver's
side
.
See513
Interior
Trim
.

Then
remove
the
driver's
side
knee
bolster
.
Lower
the
relay
panel
by
gently
releasing
the
plastic
retainers
.
See
Fig
.
4
.

During
installation,
be
sure
the
retainer
tabs
are
engaged
in
the
relay
panel
.

Splice
Panel,
Left

3

¡ni

Fig
.
3
.
Auxiliary
relay
panel
under
left
side
of
dash
.

Fuse
48)
0013035

1
.



Comfort
relay
(where
ap-



4
.



Not
used

plicable)



5
.



Not
used

2
.
Crash
control
module



6
.



EWS
II
transmitter/receiv-

3
.



Park
ventilation
relay



er
module
(from
Jan
.
1995)

0013164

Fig
.
4
.



Auxiliary
relay
panel
under
left
sideof
dashboard
(arrow)
.

The
left
splice
panel
contains
four
relay
positions
and
an
ad-
ditional
fuse
holder
(Fuses
47
and
50)
.

To
access
the
left
side
electrical
splice
panel,
remove
the

left
side
dash
panel
and
knee
bolster,
as
described
earlier
.

The
panel
is
located
above
and
lo
the
left
of
the
clutch
pedal
.

See
Fig
.
5
.

610-4



ELECTRICAL
COMPONENT
LOCATIONS

--J
L
Windshield
washertank
&
pump

Fig
.
7
.



E36
engine
compartment
layout
.
M42
engine
compartment
shown
.

-,x
0013204

Fig
.
8
.
Control
modules
under
right
sideof
dash
.
Glove
compart-
ment
has
been
removed
.
For
module
identification,
see
Fig
.
9
.

COMPONENT
LOCATIONS

RSP
'I



4

ABS



Main
engine



Power
hydraulic
harness
distribution
control
unit



connector
I



box
oe

1
.
SRS
(Airbag)
control
module
(through
1993)
2
.
ABS/ASC+T
control
module
(as
applicable)
3
.
Central
locking
module
(through
1993)
4
.
Anti-theft
alarm
module
or
ZKE
IV
control
module
(from
1994)5
.
Rear
window
blower
relay
(convertible
models)6
.
Horn
relay
7
.
Wiper/washer
module
8
.
Rear
power
window
relay
(four-door
models)9
.
Luggage
compartment
lid
lock
relay
(convertible)
10
.
Cruise
control
module
EWS
II
control
module
(from
Jan
.
1995)
RSP
:
Right
splice
panel

0013215

Fig
.
9
.



Identificationof
control
modules
under
right
side
of
dash
.
Module
utilízation
varies
byyear
andmodel

1
.
Heater
valves
2
.
ABS
pedal
travel
sensor3
.
ABS
pump

Fig
.
10
.
Left
rear
of
engine
compartment
.

4
.
Main
engineharness
con-
nector
5
.
Power
distribution
box

ELECTRICAL
COMPONENT
LOCATIONS
610-5

0013202
0013226

Fig
.
11
.
M42
engine
idie
speed
control
valve
(arrow)
beneath
intake
manifold

0012421

Fig
.
12
.
M44
engine
intake
air
temperature
(¡Al)
sensor
in
air
filter
housing

Fig
.
13
.
M50/S50U
S
engine
intake
air
temperature
(IAT)
sensor
(1)
and
throttle
position
sensor
(2)
.

301180

0012724

Fig
.
14
.
M52/S52U
S
engine
intake
air
temperature
(IAT)
sensor
in
bot-
tom
of
intake
manifold
(throttle
housing
shown
removed)
.

COMPONENT
LOCATIONS

Fig
.
29
.
Transmission
gear-position/neutral
safety
switch
under
center
console
.
Squeeze
connector
tabs
(arrows)
to
disengage
har-
ness
connector

ELECTRICAL
COMPONENT
LOCATIONS



610-
9

6263

Fig
.
30
.
Back-up
light
switch
(arrow)
on
transmission
.
(Switch
may
be
found
on
right
or
left
sideof
transmission,
depending
on
ap-
plication
.)

Fig
.
31
.
ASS
wheel
speed
sensor
(arrow)
in
front
steering
arm
.

Component
Location
Table

Table
a
is
a
cross-referenced
listing
of
electrical
compo-

nents
in
E36
vehicles
beginning
onpage
10
.
In
addition
to
lo-

cation
descriptions,
where
possiblethere
is
areference
to
a

figure
showing
the
component
.

NOTE-

-
Every
component
is
not
installed
in
everycar
.

"
Due
to
changes
in
production,
component
locations
may
vary
.
Consult
your
BMW
dealer
forthe
latest
in-
formation
.

"
The
figure
numbers
are
all
within
this
section
.
Many
other
electrical
components
are
illustrated
throughout
this
book
.
Consult
the
main
index

"
The
gear-position/neutral
safetyswitch
is
aleo
some-
times
referred
to
as
the
automatic
transmission
range
switch
.

"
The
EWS
11
system
is
also
sometimes
referredto
as
the
Driveaway
Protection
System
or
the
electronic
im-
mobilization
system
.

"
All-Season
Traction
(AST)
is
also
sometímes
referred
to
as
ASC
or
ASC+T
.

0012117

COMPONENT
LOCATIONS