1996 BMW M3 low oil pressure

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
.

610-16



ELECTRICAL
COMPONENT
LOCATIONS

Component



Model
Year



Location



Refer
to

MixingSwitch



1992-1994



Center
console

Multi-Function
Clock



1992-1998



Center
console

Multi-information
Display
(MDI)



1992-1998



Center
console

Normal
Speed
Cooling
Fan
Relay



1992-1998



Power
distribution
box



Fig
.
2
.

Neutral
SafetySwitch
(Automatic



1992-1998



Next
to
gear
shift
lever
in
center
console



Fig
.
29
.

Transmission
Range
Switch)

Oil
Pressure
Switch



1992-1998



Left
front
of
engine
below
intake
manifold
at
oil
filter
housing

On-Board
Computer



1992-1998



Center
console

On-BoardComputerHorn
Relay



1992-1998



Behind
glove
compartment



Fig
.
8
.
Fig
.
9
.

On-Board
Computer
Temperature



11992-1998



I
Right
front
of
engine
compartment

Sensor

Outside
Temperature
Sensor



1992-1997



Inright
front
brake
cooling
duct

Outside
Temperature
Sensor



1998



Right
rear
of
engine
compartment
behind
fresh
air
cowl

Oxygen
Sensor
HeaterRelay



1992-1998



Power
distribution
box



Fig
.
2
.

Oxygen
Sensor(s)



1992-1998



On
exhaust
pipe
ahead/behind
catalytic
converter
(M42/M44
engine)

Oxygen
Sensor
(x2)



1992-1995



On
exhaust
pipe
ahead
of
catalytic
converter
(M50/S50US
engine)

Oxygen
Sensors
(x4)



1996-1998



On
exhaust
manifold/exhaust
pípe
behind
catalytic
converter
(M52/S52US
engine)

Parking
Brake
Switch



1
1992-1998



I
On
rear
of
parking
brake
lever

Power
Distribution
Box



11992-1998



I
Rear
left
of
engine
compartment



I



Fig
.
2
.
Fig
.
7
.
Fig
.
10
.

Radio
Microswitch



1992
-
1996



Center
console
behind
radio

Radio
Receíver



1
1997-1998



1
Right
rear
luggage
compartment

Relay
And
Fuse
Box
(Power



1992-1998



I
Left
side
of
engine
compartment



I



Fig
.
2
.

Distribution
Box)



Fig
.
7
.
Fig
.
10
.

Rear
Window
Blower



1994-1998



Behind
rear
seat
(convertible)

Rear
Window
Blower
Microswitch



1994-1994



At
convertible
top
linkage

Rear
Window
Blower
Microswitch



1995-1998



Behind
rear
seat
(convertible)

Rear
Window
BlowerRelay



11994-1998



Behind
glove
compartment



Fig
.
8
.
Fig
.
9
.

Fig
.
2
.

Fig
.
30
.

Fig
.
8
.

Rear
Window
DefoggerRelay

Reversing
(Back-up)
Light
Switch

SplicePanel,
Right
Rollover
Protection
Actuator



11994-1998

COMPONENT
LOCATIONS

Table
a
.
E36
Component
Locations

1992-1998
1992-1998

1992-1998

Power
distribution
box

Right
or
left
side
top
of
transmission

Behind
glove
compartment

Behind
rear
seat
(convertible)

Fig
.
9
.

Continued

620-2
INSTRUMENTS

Fig
.1.



Instrument
cluster
retaining
screws
(arrows)
.

INSTRUMENT
CLUSTER

0012562

Fig
.
3
.



Turnbulb
base
45°
in
direction
shown
(arrow)
.

l
v



w
r
v
9



10



11



12



13



14



15



16



)7



18



19



20
y
21

1
.
Temperature
warning



12
.
Brake
fluid
warning

oo13n6



2
.
Right
turn
signal



13
.
Brake
pad
wear
warning
3
.
Instrument
lighting



14
.ABS
warning
Fig
.
2
.



Instrument
cluster
connector
locking
lever
(arrow)
.



4
.
Oil
pressure
warning



15
.
Seat
belt
warning5
.
Highbeam



16
.ASTwarning
6
.
Battery
charging
lamp



17
.Check
control
6
.
Installation
is
reverse
of
removal,
noting
the
following
:



7
.
Left
turn
signal



18
.Check
engine

"
Instrument
cluster
harness
connector
locking
levers



8
.
Low
fuel
warning



19
.
LCD
lighting

must
be
in
up
position
before
installing
connector
.



9
.
Airbag
warning



20
.
Rear
foglight
(not
used)
10
.
Catalytic
converter
warning



21
.
Front
foglights
"
Install
airbag
to
steering
wheel
as
described
in
721



11
.
Emergency
brake
Airbag
System
(SRS)
.



0012563

"
Reconnect
negative
(-)
cable
to
battery
last,
once
al¡



Fig
.
4
.



Bulb
designation
chart
.

harness
connectors
have
been
reconnected
.

"
Recode
cluster
as
described
in
Instrument
cluster,



CAUTION-
seif-testing
.



Note
wattage
of
bulb
.
Excessive
wattage
could
melt
cluster
housing
.
Replace
defective
bulbs
with

Instrument
cluster
bulbs,
replacing



reptacementbulbs
of
the
same
wattage
.

1
.
Remove
instrument
cluster
as
described
above
.



Odometer
coding
plug,
replacing

2
.
Remove
faulty
bulb
by
turning
bulb
base
45°
inits

mount
and
remove
from
housing
.
See
Fig
.
3
.



The
coding
plug
maintains
a
record
of
thevehicle
mileage
.

The
back
of
the
instrument
cluster
and
its
bulb
locations
are



1
.
Record
vehicle
mileage
.

shown
in
Fig
.
4
.
2
.
Remove
instrument
cluster
as
described
earlier
.

To
access
the
rear
window
blower
relay,
remove
the
glove
compariment
.
See
Fig
.
32
.

Fig
.
32
.
Rear
window
blower
relay
located
in
frontof
glove
compart-
ment
(arrow)
.

AIR
CONDITIONING

Thissection
covers
removal
and
installation
of
air
condition-

ing
refrigerant
components
.
A/C
testing
and
diagnosis,
refrig-

erantdischarge,
evacuatíon
and
recharge
are
not
covered

here
.

The
subassemblies
and
lines
of
the
air
conditionerare
filled

with
either
refrigerant
R12
(1992
cars)
or
R-134a
(1993
and

later
cars)
.
The
major
components
of
the
A/Csystem
are

shown
in
Fig
.
33
.

A/CSystem
Warnings
and
Cautions

WARNING
-

"
Always
be
careful
that
refrigerant
does
not
come
in
contact
with
your
skin
.
Always
wearhand
andeye
protection
(gloves
and
goggles)
when
work-

ing
around
the
AIC
system
.
If
refrigerant
does
come
in
contact
with
your
skin
oreyes
:
-Do
not
rub
skin
oreyes
;

-Immediately
flush
skin
oreyes
withcool
water
for
15
minutes
;
-Rush
to
a
doctor
orhospital
;
-Do
not
attempt
to
treat
yourself
.

"
Work
in
a
wefl
ventilated
area
.
Avoid
breathing
re-
frigerant
vapors
.
Exposure
may
irrítate
eyes,

nose,
and
throat
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.

"
Do
not
expose
any
component
of
the
AIC
system
to
high
temperatures
(Above
80°Cl176°F)or

open
flames
.
Excessive
heat
will
cause
a
pres-

sureincrease
whichcould
burst
the
system
.

HEATING
AND
AIR
CONDITIONING



640-
1
1

0013015

WARNING
-

"
Keep
refrigerant
away
from
open
llames
.
Poison-
ous
gas
will
be
produced
if
it
bums
.
Do
not
smoke
near
refrigerant
gases
for
the
same
reason
.

"
The
AICsystem
is
filled
with
refrigerant
gas
which
is
under
pressure
.
Pressurized
refrigerant
in
the
presenceof
oxygen
may
forma
combusti-
ble
mixture
.
Never
introduce
compressed
air
finto
any
refrigerant
container
(full
or
empty),
capped
off
AIC
component,
or
piece
of
service
equip-
ment
.

"
Refrígerant
gases
are
heavier
than
air,
displace
oxygen
and
may
cause
suffocation
in
areas
of
poor
círculation,
for
example
under
a
car
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.

"
State
and
local
governments
may
have
additional
requirements
regarding
air
conditioning
servic-
ing
.
Alwayscomply
with
state
and
local
laws
.

"
Electric
welding
near
refrigerant
hoses
causes
R-134a
to
decompose
.
Discharge
system
before
welding
.

CA
UTION
-

-As
of
January
1,
1992,
any
person
who
services
a
motor
vehicle
air
conditioner
must,
by
law,
be
properly
trained
and
certified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-approved
recycling
course
to
be
certified
.

"
It
is
recommended
that
al¡
system
refrigerant
AIC
refrigerant
be
left
to
an
authorized
BMW
dealer
or
other
qualified
AIC
service
facility
.

"
Do
not
top
off
a
partially
charged
refrigerant
sys-
tem
.
Dischargesystem,evacuate
and
then
re-
charge
system
.

"
R-134a
and
R-12
refrigerants
and
refrigerant
oils
and
system
components,
including
hoses
and
sealing
O-rings,
are
NOT
compatible
.
Compo-
nent
damage
andlor
system
contamination
will

result
.

"
The
mixture
of
refrigerant
oil
(PAG
oil)
and
refrig-
erant
R-134a
attacks
some
metals
and
alloys
(for
example,copper)
and
breaks
down
certain
hose
materials
.
Use
only
hoses
and
lines
that
are
iden-
tified
with
a
green
mark
(stripe)
or
the
lettering
R-
134a"
.

"
Immediately
plug
open
connections
on
AIC
com-
ponents
to
prevent
dirt
and
moisture
contamina-
tion
.

"
Do
not
steam
clean
condensers
or
evaporators
.

Use
only
cold
water
or
compressed
air
.

AIR
CONDITIONING

ELE-54
ELECTRICAL
WIRING
DIAGRAMS

HEADLIGHT/



RIGHT



RIGHT



LEFTLEFT



LEFT
FOGLIGHT



HIGH
RIGHT
ANTI-



DOUBLE



RIGHT
FRONT
AUXILIARY
LEFT
LOW
HIGH



LEFT
FRONT
WASHER
WASHER
BEAM
PARK
THEFT



TEMPERATURE
PRESSURE
FOG



TURN



FAN



PARK
BEAMBEAM



LEFT



FOG



TURN
RIGHT
PUMP
PUMP
LIGHTLIGHT
HORN



SWITCH
SWITCH
LIGHT
LIGHT
MOTOR
LIGHT
LIGHT
LIGHT
HORN
LIGHTLIGHT
HORN
I



i



I



i



I



i



I



i



1
--,



1
-
7



1
-
7



1
-
7



1
-
7



F
-,



I
--,



I
--,
I



i



(-
i



I
--,



I
-
i



I
-
i
,



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I
I



I



I



I



I



I



I



I



I



II



L
-I



L-1



!
_I



L
-I



L-1



!
_I



L
-I



I-_I



L
-I



L
-I



L
-I
L
-I



L
-I



L
-I



L-1



L-1

_~
_~
Y
Y
r
~r=4

84317

ENGINE
CAMSHAFT
TRANSMISSION
CONTROL



POSITION
CONTROLMODULE



_
(SENSORMODULE
(EGS)



(DME)



~_



_SHIELD
I



I



I



I
2I
I



I



I



I



--_
CAMSHAFT
III
C
POSITION
(SENSOR
rv



Q
.1
___JSHIELD
DATA
LINK
CONNECTOR

Ground
Distribution

1995-96
318ti
(1
of3)

HEATED
CRANKSHAFT
IGNITION
OXYGEN
POSITION



COIL2
I,
(
SENSOR
L
I(
SENSOR



(
SHIELD
SHIELD
SHIELD

RIGHT



LEFT
FRONT



LEFT
RIGHT



BRAKE



HIGH
LOW



FRONT
WIPER(AUXILIARY



WASHER
WASHER



FLUID



BEAMBEAM



AUXILIARY
WASHER
HAZARD
CHIME
TURN
UNLOADER
JET
JET
WIPER
LEVEL
WIPER
LIGHTLIGHT
BLOWER
TURNMODULE
FLASHER
MODULE



LIGHT



RELAY



HEATER



HEATER



MOTOR



SWITCH



RELAY



RELAY



RELAY



RELAY



LIGHT



(LOW
11)



RELAY
I
--,



F-
I



I
--,



I
--,



I
--,



I
--,



F-
I



I
--,



1
--,



I



1
-
7



1
-
7



1
-
7



1
-
7
I



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2
INDEX

Brakes
(cont
.)
pressure
bleeding
brakes
(except
cars
wíth
AST)
340-3
troubleshooting
340-1
Brushes,
alternator
See
Battery,
starter,
alternator
Bulbs
See
Exterior
lighting
See
also
Instruments
Bumpers
See
Exterior
trim,
bumpers

C

CamberSee
Steering
and
wheel
alignment
Camshaft
See
Cylinder
head
and
valvetrain
Camshaft
position
sensor
See
Ignition
system
Camshaft
timing
chain
general
information
117-1
camshaft
timingchain,
4-cylinder
117-
2
camshaft
timing
chains,6-cylinder
117-6
camshaft
timing
chain,
removing
(4-cylinder
engines)
117-2
camshaft
timing
chains,
removing
(6-cylinder
engines)
117-7vanos
(variable
valve
timing)
117-14
control
unit,
removing
117-16system
operation,
testing
117-14
Caster
See
Steering
andwheel
alignment
Catalytic
convertor
See
Exhaustsystem
Cautions
viü
Center
bearing
See
Driveshaft
Center
console
See
interior
trim
Central
body
electronics
(ZKE
IV)
515-8
Central
locking
system
(ZVM)
515-7
Centrallocking
and
anti-theft
general
information
515-1
door
handles
and
Iocks
515-1
door
striker,
replacing
515-6
front
door
handle,
removing/
installing
515-3
front
door
lock,
removing/installing
515-1
rear
door
handle,
removing/installing
515-5
rear
door
lock,
removing/installing
515-4
EWS
II
control
module,
replacing
515-10
EWS
II
ring
antenna,
replacing
515-10
EWS
II
transmitter/receiver
module,
replacing
515-11
locking
system
and
electronic
immobilization
515-7
luggage
compartment
locking
actuator,
removing/installing
515-6

Clutch
general
information210-1
clutch
hydraulic
system,
bleeding
and
flushing
210-2
clutch,
inspecting
and
installing
210-5
clutch
master
cylinder,
replacing
210-2
clutch,
removing
210-4
clutch
slave
cylinder,
replacing
210-3
transmission
pilot
bearing,
replacing
210-6
Clutch
fluid
See
Maintenance
program
Coil
See
Ignition
system
Coilspring
See
Rear
suspension
Component
locations

See
Electrical
component
locations
Compressor
See
Air
conditioning
Compressor
clutch
See
Air
conditioning
Condenser
See
Air
conditioningControl
arms
See
Front
suspension
See
also
Rear
suspension
Convertible
top
general
information
541-1
manual
convertible
top
541-1
lid
release
mechanism
541-2
replacing
541-2
visor
latch
541-1
visor
latch
píate
541-1
power
convertible
top
541-2
drive
motor,
replacing
541-7
emergency
operation
541-7
front
latching
mechanism
541-4
lid
541-9
replacing
541-5
visor
latch
541-4
visor
latch
motor541-5
visor
latch
plate
541-4
rollover
protection
system
541-9
Coolant
(Anti-freeze)
See
Maintenance
program
Coolant
pump
See
Cooling
system
Cooling
system
general
information
170-1
cooling
fan,
replacing
170-8
coolant
pump,
replacing
170-10
coolant
pump
and
thermostat170-1
coolant,
draining/filling
170-5
cooling
fans
170-2
cooling
fan,
testing
170-4
cooling
system
service
170-5
cooling
system,
bleeding
(radiator
with
integral
expansion
tank)
170-6
cooling
system
pressure
test
170-3
electric
cooling
fan,
replacing
170-8
radiator,
removing/installing
170-11

Cooling
system
(cont
.)
radiator
and
expansion
tank
170-1
radiator
service
170-11

temperature
gauge
quick
check170-3
thermostat
quick
check
170-3
thermostat,
replacing
170-9
troubleshooting
170-2
warnings
and
cautions
170-2Crankshaft
position/rpm
sensor
See
Ignition
system
Crash
sensor
See
Airbag
system
(SRS)
CV
joint
See
Maintenance
program
See
also
Rear
suspension
Cylinder
head
and
valvetrain
general
information
116-1
camshaft116-7
camshafts,
removing/installing
(M42
engine)
116-1camshafts,
removing/installing
(M44
engine)
116-3
camshafts,
removing/installing
(6-cylinder
engine)
116-4
cylinder
head,
disassembly/assembly
116-1
cylinder
head
and
valvetrain,
reconditioning
116-7
cylinder
head
116-7
hydraulic
cam
followers,
checking
and
replacing
(M42
and
al]
6-cylinder
engines)
116-9
hydraulic
valve
adjusters,
checking
and
replacing
(M44
Engine)
116-8
valve
guides
116-10
valveseats
116-12
valve
springs
116-12
valve
stem
oil
seals
116-11
valves
116-11

valves,
leak
test
116-11
valves,removing/installing
116-6
Cylinder
head
removal
and
installation
general
information
113-1
cylinder
head,
removing/installing
(4-
cylinder
engine)
113-1
cylinder
head
(6-cylinder
engine),
removing/installing
113-10

Dashboard
See
Interior
trim

Deck
lid
See
Trunk
lid
Defogger

See
Heating
Differential
See
Final
drive
DISA
(dual
resonance
intake
system)
See
Fuel
injection
See
also
Engine-general
DME
(digital
motor
electronics)
See
Ignition
system
See
alsoFuel
injection