tire pressure BMW 323i 1993 E36 User Guide

160-
4



FUEL
TANK
AND
FUEL
PUMP

Fig
.
4
.



Pinch
off
supply
and
retum
fuel
hoses
(arrows)
before
dis-
connecting
from
rigid
metal
lines
.

0013143

Fig
.
5
.
After
removing
exhaustsystem,
remove
heat
shield
screws
(arrows)
and
heat
shield
.

9
.
Working
underneath
car,
loosen
hose
clamp
and
dis-

connect
filler
hose
.

10
.
Support
tank
from
below
.
Remove
tank
strap
mounting

bolts
.
Lower
and
remove
tank,
disconnecting
right
side



TheE36
model
uses
a
two-lobed
fuel
tank
and
each
lobeof
vent
and
other
hoses/electrical
connectors
as
neces-



the
tank
has
its
own
fuel
level
sending
unit
.
sary
.

11
.
Installation
is
reverse
of
removal
.

"
Always
use
new
seals,
gaskets,
O-rings,
and
hose
clamps
.

"
Inspect
hoses
and
replace
any
that
are
chafed,
dried

outor
cracked
.

"
Inspect
heat
shield
and
replace
if
corroded
.

"
Inspect
rubber
buffers
and
liners
on
fuel
tank,
support
straps
and
on
underside
of
body
.
Replace
rubber

parts
that
are
hardened
or
damaged
.

FUEL
LEVEL
SENDERS

CAUTION-

"
Before
starting
the
engine,
fill
the
fuel
tank
with
at
least
1.5
gallons
(5
liters)
of
fuel
to
prevent

damaging
a
dry
fuel
pump
.

"
If
the
filler
neck
has
been
removed
from
the
body,
be
sure
toreattach
theneck's
grounding
screw
(where
applicable)
.
Check
electrical
resistance
between
the
ground
tab
and
wheel
hub
.
The
re-
sistance
shouldbeno
higher
than
0
.6
ohms
.

Tightening
Torques

"
Fuel
tank
to
body
.............
...
23
Nm
(17
ft-Ib)

"
Hose
clamps
(10
mm-16
mm
día
.)
..
2
.0
Nm
(18
in-lb)

Fuel
Tank
Evaporative
Control
System

The
fuel
tank
evaporative
control
system
is
used
to
vent
the

fuel
tank
to
a
charcoal
canister,
which
is
then
purgedby
en-

gine
vacuum
during
normal
engine
operatíon
.
This
controls

emission
of
raw
hydrocarbons
(fuel)
to
the
atmosphere
.
See

Fig
.
1
.

A
fuel
expansion
tank,
located
under
the
right
rear
fender,

traps
overflow
fuel
and
incorporates
extra
fuel
tank
plumbing
.

Startingwith
1996
models,
OBD
II
standards
require
that

the
fuel
tank
evaporative
control
system
be
monitored
for

leaks
.
This
is
accomplished
usingthe
fuel
tankpressuresen-

sor,
the
ventshut
off
valve,
and
the
evaporative
purge
valve
.

NOTE-

On
most
early
cars(1992-1995),
the
charcoal
canister

is
in
the
engine
compartment
.
On
latercars,
the
char-
coal
canister
is
under
the
spare
tire
in
the
luggage
com-
partment
.

FUEL
LEVEL
SENDERS

The
right
side
fuel
leve¡
sender
is
integrated
with
the
fuel

pump
.
Each
senderhas
a
float
connected
to
a
variable
resis-

tance
for
fuel
leve¡
.
When
replacing
the
sender/pump
assem-

bly
always
replace
hose
clamps,gaskets
and
O-rings
.

WARNING
-

When
removing
the
fuel
level
sender
or
the
fuel
pump,
the
fuel
tank
should
be
emptied
.

300-4



SUSPENSION,
STEERING
AND
BRAKES-GENERAL

Three-channel
ABS
ís
used
on
al[
E36
cars
equipped
with



Al¡
Season
Traction
(AST)
standard
ABS
.
Each
front
wheelhas
a
separate
solenoid

valve
to
modulate
hydraulic
pressure
to
that
brake
caliper
.



The
traction
control
system
works
in
conjunction
with
ABS
The
rear
wheels
are
modulated
asa
pair,
controlled
by
a
sin-



and
the
engine
management
system
to
enhance
vehicle
con
gle
solenoid
valve
.



trol
.
The
main
function
of
the
AST
system
is
to
maintain
the
rolling

contact
between
the
tires
and
the
road
surface
under
al¡
driving
E36
cars
equipped
with
ABS/AST
utilize
a
four
channel
sys-



conditions
.
This
is
achieved
through
exact
application
and
tem,
which
functionsexactly
as
the
three
channelsystem



management
of
braking
and
drivetrain
forces
.
above,except
that
the
rear
wheels
are
modulated
individually
.

IDLE
SPEED
CONTROL
VALVE

HROTTLE
PLATE

6
.

Í
III

i



ADS
ACTU
AT
OR

THROTTLE
PLATE
POSITION
SENSOR

DME

Fig
.
6
.
All
Season
Traction
(AS)
works
withother
drivetrain
systems
to
enhance
vehicle
control
.

INTEGRATED
SYSTEMS

The
throttle
control
system
used
in
AST
is
illustrated
in
Fig
.

MASS
AIR
FLOW
SENSOR

JADS
THROTTLE
PLATE
POSITION
SENSOR

0013006

NOTE-

The
traction
control
system
referred
to
as
AST
(all
sea-
son
traction)
may
also
be
referred
to
as
ASC
(Automat-
ic
Stability
Control)
and
ASC+T
(Automatic
Stability
Control+Traction)
.

The
AST
system
improves
traction
by
electronically
apply-

ing
the
rear
brakes
when
therear
drive
wheels
are
spinning
at

a
faster
rate
than
the
front
wheels
.
The
combined
ABS/AST

control
module,
operating
through
the
ABS
hydraulic
control

unit,
modulates
braking
force
at
therear
wheels
.

In
addition,
AST
uses
retarded
ignition
timing
and
an
auxil-iary
engine
throttle
plate
to
reduceengine
torque
and
maintain

vehicle
stability
.

The
auxiliary
throttle
plate
is
held
open
by
spring
pressure
.

The
AST
system
actívates
the
auxiliary
throttie
position
motor

(ADS)
to
cose
the
AST
throttle
as
needed
.
This
reduces
the

volume
of
engine
intake
air
.
Due
to
the
throttle
closing
very
rapidly
during
AST
operationthe
driver
cannot
increase
theengine
power
output
regardless
of
how
far
theaccelerator
pedal
is
pushed
to
the
floor
.

The
auxiliary
throttle
plate
is
placed
ahead
of
the
conven-

tional
throttle
plate
in
the
throttle
body
.

Traction
control
also
comes
into
operationduringdecelera-
tion
.
Decelerating
on
snowy
or
icy
road
surfaces
can
lead
to
rear
wheel
slip
.
If
a
rear
wheel
startsto
drag
or
lock
up
when

the
throttle
is
closed
rapidly
orduringdownshifting,the
AST
system
can
limit
the
problem
by
advancing
the
ignition
timing
.

A
switch
on
the
center
console
is
used
to
togglethe
AST
on

or
off
.

The
AST
system
is
designed
to
be
maintenance
free
.
There

are
no
adjustments
that
can
be
made
.
Repair
and
trouble-
shooting
of
the
AST
system
requires
special
test
equipment

andknowledgeand
should
be
performed
only
by
an
autho-

rized
BMW
dealer
.
Table
a
lists
theconditions
indicated
by

the
AST
indicator
light
in
the
instrument
cluster

SUSPENSION,
STEERING
AND
BRAKES-GENERAL



300-5

Tablea
.
AST
Indicator
Lamp
Function

Indicator
lamp



1
Condition



1
Comment

Light
on



Normal
AST
start-



Automatic
AST
up



self-test

Light
off



AST
monitoring



Automatic
AST
op-
mode



eration

Press
AST
button,



AST
off
(disabled)



Rocking
the
car
tolight
comes
on



getout
of
snow
or
other
loose
surface
Driving
with
snow
chains

Press
AST
button
:



AST
monitoring



Automatic
AST
op-
light
goes
out



I
mode



eration

Light
flashes



AST
active
mode



I
Normal
AST
oper-
ation
as
it
controls
wheel
speed

Light
stays
on
af-



Defect
in
AST



Consult
BMW
ter
start
up
or



dealer
for
diagno-
comes
on
while



sis/repair
driving



(Vehicle
operation
remains
normal)

WARNING
-

Even
a
car
with
AST
is
subject
to
the
normal
physi-
cal
laws
.
Avoid
excessive
speeds
for
the
road
con-
ditions
encountered
.

CAUTION-
"
If
the
tires
on
the
carare
of
different
makes,
the
AST
system
may
over-react
.
Only
fit
tires
of
the
same
make
and
tread
pattem,

"In
adverse
conditions,
such
as
trying
to
rock
the
car
outof
deep
snow
or
another
soft
surface,
or
when
snow
chainsare
fitted,
it
is
advisable
to
switch
off
AST
and
allow
the
cars
driveline
to
op-
erate
conventionally
.

INTEGRATED
SYSTEMS

increased
power
output
and
road-handling
demands
.

The
steering
geometry
is
modified
by
changing
the
cast-

er/camber
angles
slightly
.
This
is
accomplishedby
reposition-

ing
the
upper
strut
mounting
holes
in
the
frontstrut
towers
and

through
different
front
and
rear
control
arms
.

M3
Brake
System
Improvements

"
Vented
directionalfront
rotors
:
315
mm
dia
.
x
28
mm
thick
.

"
Vented
directional
rear

rotors
:
312
mm
dia
.
x20
mm
thick
.

"
Larger
brake
pads
and
calipers
.

"
Modified
Teves
ABS
system
.

SUSPENSION,
STEERING
AND
BRAKES-GENERAL



300-
7

M3
SUSPENSION
AND
BRAKES



NOTE-

M3
brake
rotors
are
directional,
having
a
different
part

TheE36
M3
was
introduced
in
late
1994
as
a
1995
model
.



number
for
each
side
.
Rotors
with
an
odd
part
number

The
design
of
the
M3
suspension,
steering
and
brakes
is
a



go
on
the
left
while
rotors
with
en
even
part
numbergo

modification
of
existing
E36
systems
which
accommodates



on
the
right
.

M3
Front
SuspensionImprovements

"
Reinforced
spring
plates,control
arms,
control
arm
bush-

ings,
steering
arms
.

"
Recalibrated
struts,
firmer
springs
.

"
Stiffer
stabilizerbar,
larger
stabilizer
bar
bushings
.

"
Front
stabilizer
linked
to
struts
.

M3
Wheels/Tires

"
Front
wheels
1992-1998
:.....
7
.5J
x
17
in
.
light
alloy

"
Rear
wheel
1992-1997
.......
7
.5J
x17
in
.
light
alloy

"
Rear
wheel
(option)
........
.8
.5
Jx17
in
.
light
alloy

"
Front
and
rear
tire

1992-1997
.............
.
.
.
...
...
235/40
x
17
in
.

"
Front
tire
1998
only
......
...
.
.
.
...
225/45
x
17
in
.

"
Rear
tire
1998
only
.......
.
.
.
...
...
245/40
x
17
in
.

CAUTION-

In
en
emergency,
an
M3
front
wheel/tire
assembly
may
be
mounted
on
the
rearaxle
.
However
a
rear
wheel/tire
assemblymust
not
be
mounted
on
the
front
axle
.

M3
RearSuspensionImprovements

"
Reinforced
trailing
arms
.

"
Recalibrated
shock
absorbers,
firmer
springs
.



SUSPENSION
AND
STEERING

TROUBLESHOOTING

Stable
handling
and
ride
comfort
both
depend
on
the
integ-

rity
of
the
suspension
and
steering
components
.
Any
symp-

tom
of
instability
or
imprecise
road
feel
may
be
caused
by

worn
or
damaged
suspension
components
.

When
troubleshooting
suspension
and
steering
problems,

also
consider
the
condition
of
tires,
wheels,
and
their
align-

ment
.
Tire
wear
and
incorrect
inflation
pressures
can
dramati-

cally
affect
handling
.
Subtie
irregularities
in
wheel
alignment

angles
also
affect
stabílity
.
Mixing
different
types
or
sizes
of

tires,
particularly
on
the
same
axle,
can
affect
alignment
and

may
unbalancea
car's
handling
.

Table
b
lists
the
symptoms
of
common
suspension
and

steering
problems
and
their
probable
causes,
and
suggests

corrective
actions
.
Bold
type
indicates
the
repair
groups

where
applicable
test
and
repair
procedures
can
befound
.

SUSPENSION
AND
STEERING
TROUBLESHOOTING

300-8



SUSPENSION,
STEERING
AND
BRAKES-GENERAL

Tableb
.
Suspension
and
Steering
Troubleshooting

Symptom



1



Probable
cause
Repairs
(Repair
Groups
shown
in
bold)

Car
pulís
to
one
side,
wanders



a
.
Incorrect
tire
pressure



a
.
Check
and
correct
tire
pressures
.
020
b
.
Incorrect
wheel
alignment



b
.
Check
and
adjust
wheel
alignment
.
320
c
.
Faulty
brakes
(pulls
only
when
braking)



I
c
.
Check
for
sticking/damaged
front
caliper
.
340

Steering
heavy,
poor
return-



a
.
Worn
upper
strut
bearing(s)



a
.
Replace
strut
bearings
.
310
to-center



b
.
Incorrect
tire
pressure



b
.
Check
and
correct
tire
pressures
.
020
c
.
Power
steering
system
faulty



c
.
Check
power
steering
fluid
level
.
Test
system
pressure
.
320

Front-end
or
rear-end
vibra-



a
.
Worn
strut
cartridgesor
shock
absorbers



a
.
Replace
strut
cartridges
.
310,
330
tion
or
shimmy



b
.
Worn
suspension
bushings
(control
arm
or
trail-



b
.
Replace
worn
bushings
.
310,
330
ing
arm)
c
.
Worn
front
suspension
ball
joints
(control
arm,



c
.
Replace
worn
ball
joints
.
310
steering
arm
orsteering
tie-rod
end)d
.
Unbalanced
or
bent
wheels/tires



d
.
Balance
tires
.
Check
tiresfor
uneven
wear
pat-
terns
.
Check
wheels
for
damage
.
e
.
Loose
wheel
lug
boits



e
.
Tighten
lug
boits
to
proper
torque
.

Poor
stability,
repeated
bounc-
I
a
.
Worn
strut
cartridgesor
shock
absorbers



I
a
.
Replace
strut
cartridges
.
310,
330
ing
after
bumps,
suspension
bottoms
outeasily

Suspension
noise
(especially



a
.
Worn
front
upper
strut
bearings



a
.
Replaceupper
strut
bearings
.
310
over
bumps)



b
.
Loose
front
strut
cartridge



b
.
Check/tighten
strut
cartridge
collar
nut
.
310
c
.
Worn
suspensionbushings
(control
arm
or
trail-



c
.
Replace
worn
bushings
.
310,
330
ing
arm)d
.
Worn
stabilizer
bar
rubber
mounts



d
.
Replace
stabilizer
bar
rubber
mounts
.
310,
330
e
.
Loose
suspension
crossmember



e
.
Check
crossmember
for
damage
.
Tighten
mounting
boits
.

Uneven
ride
height



a
.
Incorrect
coil
springs



a
.
Measure
ride
height
and
replacesprings
as
re-
quired
.
310,
330
b
.
Bent
or
damaged
suspension
components



b
.
Inspect,
repair/replace
asnecessary
.
310,
330
c
.
Sagging
coil
springs



c
.
Measure
ride
height
and
replace
springs
as
re-
quired
.
310,
330

Wheel
noise,
continuous



I
a
.
Worn
wheel
bearing



I
a
.
Replacewheel
bearing
.
310,
330
growling,
may
be
more
notíce-
able
when
turning

Steering
loose,
imprecise



a
.
Incorrect
tire
pressure



a
.
Check
and
correct
tire
pressures
.
020
-



b
.
Loose
steering
gearmounting
bolt(s)



b
.
Inspect
and
tighten
boits
.
320
c
.
Worn
tie
rodend(s)



c
.
Replace
tie
rod(s)
and
align
wheels
.
320
d
.
Faulty
front
wheel
bearing



d
.
Replace
wheel
bearing
.
310
e
.
Worn
or
damaged
steering
gear



e
.
Adjust
or
replace
steering
gear
.
320
f
.
Worn
tires



f
.
Replace
tires
.
010

SUSPENSION
AND
STEERING
TROUBLESHOOTING

320-
6



STEERING
AND
WHEEL
ALIGNMENT

Front
Toe-in
andToe
Difference
Angle



Wheel
Alignment
Specifications

Toe-in
is
the
difference
in
the
distance
between
the
front
of



Alignment
specificationsfor
the
E36
are
listed
in
Table
a

the
front
wheels
and
the
rear
of
the
front
wheels
.
It
is
adjusted



and
Table
b
.
The
specifications
only
apply
under
the
following

by
altering
the
length
of
the
outer
tie
rods
.



conditions
:

Toe-in
adjustments
should
only
be
made
on
alignment
equipment
with
the
car
in
normalloaded
position
as
described

below
under
Wheel
Alignment
Specifications
.

Toe
difference
angledetermines
the
progressively
different

pathstaken
by
the
front
wheelsas
the
car
is
turning
.
It
is
fixed
by
the
steering
gear,
but
depends
on
accurate
setting
of
the
toe-in
.

Rear
Toe-in

There
is
no
provision
for
routinerear
wheel
toe-in
adjust-

ment
.
If
any
alignment
angles
deviate
from
specifications,
carefully
inspect
the
rear
trailing
arms,
rear
suspension
sub-
frame
and
al¡
associated
bushings
and
flexible
mounts
for
wear
or
damage
.
After
replacing
any
parts
that
appear
worn
or
damaged,
re-check
thetoe
measurements
.

WHEEL
ALIGNMENT

Table
a
.
Front
Wheel
Alignment
Specifications

"
Correct
wheels
and
tires
are
installed,
in
good
condition,
and
are
at
the
correct
inflation
pressures
.

"
Al¡
steering
and
suspension
parts
and
bushings
areun-

damaged
and
show
no
signs
of
abnormal
wear
.

"
Wheel
bearings
are
in
good
condition
.

"
Ride
height
is
in
accordance
with
specifications
.

See
310
Front
Suspension
and330
Rear
suspension
.

"
Car
isin
normal
loaded
position
.

Normal
loaded
position

"
Each
front
seat
.....:.............
68
Kg
(150
lb)

"
Rear
seat
(center)
................
68
Kg
(150
lb)

"
Trunk
.
.
.
..
.......................
21
Kg
(46
lb)

"
Fueltank
.
........................
...
.
..
..
full

3181325
Model



3181325



sport



M3
3
.0
liter



M3
3
.2
liter
suspension

Toe
angle
(total)



0°
18'±8'



0°
18'±8'



0°
10'
±5'



0°
10't5'

Camber

To
1995



-0°
40'±30'



-0°
58'±
30'



-0°55'±30'



-

1995
on



-0°
30'
±30'



-0°
51'±30'



-0°55'±30'



-0°
46'±30'

Caster

10°
wheel
lock



3°
41'±30'



3°
50'±30'



6°
38'±30'



9°
35'±30'

20°
wheel
lock



3°
52'±30'



3°
57'
t30'



6°
52'±30'



7°
50'±30'

Front
Wheel
Displacement



0°
t15'



0°t15'



0°
±15



0°
±15'

Table
b
.
Rear
Wheel
Alignment
Specifications

3181325
Model



3181325



sport



M3
3
.0
liter



M3
3
.2
liter
suspension

Toe
angle
(total)



0°
24't6'



0°
24'±6'



0'30'
.-t6'



0°
30't6'

Camber



-l'
40'
t15'



-2°
0'
t15'



-1
°
45'
t10'



-1'45'±10'

Maximum
allowabledeviation
between
sides



0°
±3'



0°
±3'



0°
t3'



0°
t3'

340-2
BRAKES

When
troubleshooting,
keep
in
mind
that
tire
inflation,
wear

and
temperature
can
affect
braking
and
suspension
.
See310

Front
Suspension
for
more
information
on
front
suspension

parts
inspection
.

Table
a
lists
symptoms
of
brake
problems,
their
probable

causes,
and
suggested
corrective
actions
.

Table
a
.
Brake
System
Troubleshooting

Symptom



1



Probable
cause



1



Repairs

Brake
squeal



a
.
Incorrectly
installed
brake
pads
or



a
.
Check
component
installation
.
parking
brake
shoes
b
.
Brakepad
carriers
dirty
or
corroded



b
.
Remove
brake
pads
and
clean
calipers
.
c
.
Brake
pad
anti-rattle
springs
faulty
or



c
.
Install/replace
anti-rattle
springs
.
missing
d
.
Brakepads
heat-glazed
or
oil-soaked



d
.
Replace
brake
pads
.
Clean
rotors
.
Replace
leaking
calipers
as
required
.
e
.
Wheel
bearings
worn
(noise
most



e
.
Replace
worn
bearings
.
See310
Front
Suspension
pronounced
when
turning)



or
330
Rear
Suspension
.

Pedal
goes
to
f
loor
when
braking



a
.
Brake
fluid
leve¡
low
due
to
system



a
.
Check
fluidlevel
and
inspect
hydraulic
system
for
leaks



signs
of
leakage
.
Fill
and
bleed
system
.
b
.
Master
cylinder
faulty



I
b
.
Replacemaster
cylinder
.

Low
pedal
after
system
bleeding



1
a
.
Master
cylinder
faulty



1
a
.
Replace
master
cylinder
.

Pedal
spongy
or
brakes
work
only



a
.
Air
in
brake
fluid



a
.
Bleedsystem
.
when
pedal
is
pumped



b
.
Master
cylinder
faulty
(interna¡
return



b
.
Replacemaster
cylinder
.
spring
weak)
c
.
Leaking
line
or
hose
unions



c
.
Repair
or
replace
lines
and
hoses
.
Bleed
system
.

Excessive
braking
effort



a
.
Brake
pads
wet



a
.
Use
light
pedal
pressure
to
dry
pads
while
driving
.
b
.
Brake
pads
heat-glazed
oroil-soaked



b
.
Replace
brake
pads
.
Clean
rotors
.
Replace
leaking
calipers
.
c
.
Vacuum
booster
or
vacuum
hose
con-



c
.
Inspect
vacuum
lines
.
Test
vacuum
booster
and
re
nections
to
booster
faulty



place
as
required
.
Test
vacuum
non-return
valve
for
one-way
air
flow
.

Brakes
pulsate,
chatter
or
grab



a
.
Warped
brake
rotors



a
.
Resurface
or
replace
rotors
.
b
.
Brake
padsworn



b
.
Replace
brake
pads
.
c
.
Brake
pads
heat-glazed
or
oil-soaked



c
.
Replace
brake
pads
.
Clean
rotors
.
Replace
leaking
calipers
.

Uneven
braking,
car
pulís
to
one



a
.
Incorrect
tire
pressures
or
worn
tires



a
.
Inspect
tire
condition
.
Check
and
correct
tire
pres-
side,
rear
brakes
lock



sures
.
b
.
Brake
pads
on
one
side
of
car
heat-



b
.
Replace
brake
pads
.
Clean
rotors
.
Replace
leaking
glazed
or
oil-soaked



calipers
.
c
.
Caliper
or
brake
pads
binding



c
.
Clean
and
recondition
brakes
.
d
.
Worn
suspension
components



d
.
Inspect
for
worn
or
damaged
suspension
compo-
nents
.
See
310
Front
Suspension
or
330
Rear
Sus-
pension
.

Brakes
drag,
bind
or
overheat



a
.
Brake
caliper
or
brake
pads
binding



a
.
Clean
or
replace
caliper
.(
b
.
Master
cylinder
faulty



b
.
Replacemaster
cylinder
.

WARNING
-

On
cars
with
All
Season
Traction
(AST),
special
BMW
service
equipment
is
required
to
properly
bleed
the
ABS/AST
system
.
For
safety
reasons,
the
brake
system
on
carswith
ABS/AST
must
not
be
bled
using
the
procedures
described
inthis
repair
group
.

BLEEDING
BRAKES

Brake
bleeding
is
usually
done
for
one
of
two
reasons
:
Ei-
ther
to
replace
oíd
brake
fluid
as
part
of
routine
maintenance
or
to
expel
trapped
air
in
the
system
that
resulted
from
open-
ingthe
brake
hydraulic
system
during
repairs
.

BLEEDING
BRAKES

Alwaysuse
new
brake
fluid
from
an
unopened
container
.It

is
important
to
bleed
the
entire
system
when
any
part
of
the

hydraulic
system
has
been
opened
.
On
cars
not
equipped
with
traction
control
(AST),
brake
system
bleeding
should
be

done
with
a
pressure
bleeder
.
On
cars
with
AST,
brake
bleed-

ing
should
be
done
by
an
authorized
BMW
dealer
.

WARNING
-

On
cars
with
All
Season
Traction
(AST),
special
BMW
service
equipment
is
requíred
to
properly
bleed
the
ABS/AST
system
.
For
safetyreasons,
the
brake
system
on
carswith
ABS/AST
must
not
be
bled
using
the
procedures
described
inthís
repair
group
.

ELE-132
ELECTRICAL
WIRING
DIAGRAMS

2
REDIGRN

3
BLKIGRY
4
BLKIBLU

5
GRY/BLK
B
SRN/ORG

YEL/GRN

y8
YEL/VIO
y7
.
BRNIYEL

18
REDIGRN

AUXILIARY
FAN
MOTOR

7449
4

NORMALSPEED



HIGHSPEED
RELAY



RELAY

Air
Conditioning
&
Heating

1993-95
Except
318ti
(2
of
2)

J
.
-
~~

BLOWER
SWITCH
THERMAL
LIMITER

!A~~I1011111~!~lu_
y9
BLK/RED



I



I

2
G

~~~Jl~li~i~

MEMINMEM
BLOWERBLOWER
RESISTORS
MOTOR

al
a
F

I
J
,



2j
,

RESHAI~R



DASHVEN~TMIXING
RECIR



EA
PORPTOR
COMPRESSOR



LAP
MOTOR



FLAP
MOTOR



FLAP
MOTOR



TEMPERATURE
SENSOR
CONTROLRELAY

REDIGRN
2
G
RN
5

GRN
6

REDIGRN
B

BLK/WHT/VEL
4

PARK
HEATING/
VENTILATION
RELAY
BOX

BLK/WHT/YEL
14



I

ON-BOAR
COMPUTER

BRN



r
-
-------_
RED
"
I



I
VOLTAGEFORRECFLAP
RED



VOLTAGE
FORM
IX
FLAP



I
RED
3
iVOLATAGEFORFRESH
FLAP



!
(
BLK/REDIYEL



4

s~l
YEL
6
I
AICCOMPRESSOR



WHT
7
IRECIRCFLAPACTIRECIRCFLAPACT
BLK
WHT
EL
8



DRY
B
I
RECIPC
FLAP
ACT
9



BRN
RED



BLU



9
IRECIRCFLAPACT
CRY



YEL
10
I
FRESH
FLAP
ACT
WHT
11
yy



BLU



IFRESH
FLAP
ACT
12



VELREDGRV



12,
`
I
FRESH
FLAP
ACT
13



YEL
BLU



BLU
13
I
FRESH
FLAP
PCT
14



VELRED



-LIRE
D14
IVGLTAGEFORROTSW
.
1



GRNIBLU



COMPUTER
!~WHT/VEL
15I
DATAJ
~IIDATALINE
l



WHT
/VIO



16
LINES
l~C
i
DATA
LINE
VEL/VIO
17
VENTFLAP
SWITCH
BRN/VEL
18,
1

DEFOG
REAR
GER~
BRN/YEL
20(
1
SYSTEM
2
'
IREAPDEFOGGERACT
BLU/BLK
22(
I
ICOMPRESSORCONTROL
BLU
2
3~
DASH
ENTMIXFLAP
L
SPIN
GRV
24
20IOASHVENTMIXFLAP
Jt
II



IIII



WH7
25
BELOW



ABOVE



YEL
26
`IDAS
.VENTMIXFLAP
B
11
.P
6
.30
BAR



gLK/GRV



.



ODASHVENTMIXFLAP

INTEGRATED
GLIMATE
ABOVE
BELOW



REGULATI
A



It



L-
-
--
-
-
---
--
ONCONTROLMODULE
2
.6



21
BAR



BLU/BLK
BAR
BELOW
158AR



BLK/
}
GR


N
ABOVE
BRN
18
BAR
PRESSURESWITCH
1994-95

BRN



i..~I

VEL/GRN
2
GRV/BLK
3

DR
./-
1

MIXINGACTUATOR

RIGHTHEATEXCHANGER
TEMPERATURESENSOR

6PN/ORG
2

BLU
I

OUTSIDE
TEMPERATURESENSOR

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
tosafe
and
successful
service
work
.
Before
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
work
on
your
BMW
.
Please
also
read
any
warnings
and
cautions
that
accom-
pany
the
procedures
in
the
manual
.

Fuel
pressure
regulator
See
Fuel
injection
Fue]
pump
general
information
160-1
electrical
tests
160-7
power
consumption,
testing
160-7
delivery
tests160-8
delivery
volume,
testing
g
160-9
electrical
circuit,
checking
160-7
fuse
and
relay
160-6
level
sender
See
pump/fuel
leve¡
sender
operating
fuel
pump
for
tests
160-6
pump/fuel
level
sender
(left
side),
removing/installing
160-6
pump/fuel
leve¡
sender
(right
side),
removing/installing
160-5
relieving
fuel
pressure
and
connecting
fue¡
pressure
gauge
160-8
Fueltank
and
lines
general
information
160-1
draining
160-2
evaporative
control
system
160-4
leve¡
senders,
testing
160-5
removing/installing
160-3
Fundamentals
for
the
do-it-yourself
owner
general
information
010-1
advice
for
the
beginner
010-4
cleanliness
010-4
electrical
testing
010-6
gaskets
and
seals
010-5
non-reusable
fasteners
010-5
planning
ahead
010-4
tightening
fasteners
010-5
wire
repairs
010-6
buying
parts
010-6
genuine
BMW
parts
010-6
information
you
need
to
know
010-7
non-returnable
parts
010-7
emergencies
010-11brake
fluid
leve¡
010-13
car
will
not
start
010-11
changinga
tire
010-11
check
enginewarning
light
010-13
dim
Iights
010-13
jump
starting
car
010-12
low
o]I
pressure
010-13
overheating
010-12

Emergencies
(cont
.)
spare
parts
kit
010-14
towing
010-13
gettingstarted
010-2
lifting
thecar
010-3
raising
car
safely
010-3
safety
010-2
working
under
car
safely
010-4
how
to
use
this
manual
010-2
warnings,
cautions
and
notes
010-2
service
010-7
tools
010-7
basic
tool
requirements010-8
BMW
specialtools
010-11
feeler
gauges
010-10
jack
stands
010-9
oil
change
equipment
010-9
torque
wrench
010-10
volt-ohm
meter
(VOM)
or
Multi-
meter010-10
Fuses
See
Electrical
component
locations

G

Gaskets
See
Fundamentals
for
the
do-it-
yourself
owner
Gearshift
See
Gearshift
linkage
Gearshift
linkagegeneral
information
250-1
automatic
shiftlock,
checking
function
250-5
automatic
transmission
gearshift
250-
3
gear
position/neutral
safety
switch,
replacing
(automatic
transmission)
250-4
gearshift
lever,
installing
(manual
transmission)
250-2
gearshift
lever,
removing
(manual
transmission)
250-1
gearshift
mechanism,
adjusting
(automatictransmission)
250-3
manual
transmission
gearshift
250-1
shift
interlock,
checking
function
(automatic
transmission)
250-6Glass
See
Door
windows
Glove
compartment
See
Interior
trim
Grille
See
Exterior
trim,
bumpers
Guibo
(flex
disc)
See
Driveshaft

Handle,
door
See
Doors
Hardtop
See
Body-general
Headlight
See
Exterior
lighting
Headlight
switch
See
Switches
and
electrical
accessoriesHeater
box
See
Heating
Heater
core

See
Heating
Heater
valve
See
Heating
Heating
general
information
640-1
air
distribution
motors
640-9
air
distribution
motor,
replacing
(rotary
knob)
640-10
blower
motor,
removing/installing
640-1blower
motor
resistor
pack,
replacing
640-3
control
head
640-7
removing/installing
(digital-display)
640-8
removing/installing
(rotary
knob)
640-7
control
module
removing/installing
(digital-display)
640-8
removing/installing
(rotary
knob)
640-8
heater
box,
removing640-4
heater
core,
replacing
640-6
heater
core
temperature
sensor,
replacing
640-7
heater
valve,
replacing
640-3
rear
window
blower
(convertible
models)
640-10
reas
window
defogger
640-10sensor
fan
forinterior
temperature,
replacing
640-9warnings
and
cautions
640-11
Hood
See
Fenders,
engine
hood

Idle
speed
See
Maintenance
program
Idle
speed
control
valve
See
Fuel
injection
Ignition
switch
See
Switches
and
electrical
accessories

INDEX
5