brakes BMW 323i 1993 E36 Service Manual
[x] Cancel search | Manufacturer: BMW, Model Year: 1993, Model line: 323i, Model: BMW 323i 1993 E36Pages: 759
Page 302 of 759
340-
1
2
BRAKES
ABS
is
self-tested
by
the
ABS
diagnostic
unit
each
time
the
car
is
started
.
Once
the
test
is
complete,
the
ABS
dashboard
light
tucos
off
.
If
the
light
remains
lit
or
comes
on
at
any
time
during
driving,
a
system
fault
has
occurred
and
ABS
is
elec-
tronically
disabled
.
The
conventional
braking
systemremains
fully
functioning
.
ABS
Inspection
A
visual
inspection
of
the
ABS
may
help
to
locate
system
faults
.
If
no
visual
faults
can
befound
and
the
ABS
light
re-
mains
on,
have
the
system
diagnosedbyan
authorized
BMW
dealer
.
Carefully
inspect
the
entire
ABS
wiring
harness,
particularly
the
pulse
sensorharnesses
and
connectors
near
each
wheel
.
Look
for
chafing
or
damage
due
to
incorrectly
routed
wires
.
Carefully
remove
the
wheelspeed
sensors
.
Clean
the
sen-
Fig
.
18
.
Front
ABS
pulse
sensor
mounting
bolt
(arrow)
.
sor
tips
.
Inspect
the
toothed
wheel
on
thewheel
hub
.
Check
for
missing,
clogged
or
corroded
teeth,
or
other
damage
that
could
alter
the
clearance
between
the
sensor
tip
and
the
toothed
wheel
.
NOTE-
If
a
toothed
ring
is
damaged,
the
entire
wheel
hub
mustbe
reptaced
.
See
310
Front
Suspension
or330
Rear
Suspension
.
ABS
wheel
speed
sensors,
replacing
1
.
Raise
applicable
end
of
car
.
WARNING
-
Make
sure
thecar
is
firmly
supportedon
jack
stands
designed
for
the
purpose
.
Place
the
jack
stands
be-
neath
a
structural
chassis
point
Do
not
place
jack
stands
under
suspension
parts
.
2
.
Unscrew
wheelspeed
sensor
mounting
bolt
.
Remove
sensor
from
its
housing
.
See
Fig
.
18
.
Remove
harnessfrom
retaining
mounts
.
3
.
Front
ABS
sensor
:
Working
in
front
wheel
housing,
dis-
connect
and
remove
sensor
.
See
Fig
.
19
.
4
.
Rear
ABS
sensor
:
Working
in
rear
wheel
housing,
dis-
connect
andremove
sensor
.
5
.
During
installation,
apply
thin
coat
of
Molykote
0
Long-
term
2
or
an
equivalent
grease
to
pulse
sensor
and
housing
.
ANTILOCK
BRAKE
SYSTEM
(ABS)
0012122
Fig
.
19
.
Front
ABS
wheel
speed
electrical
connector
(arrow)
in
wheel
well
.
6
.
Installation
is
reverse
of
removal
.
Page 383 of 759
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
Page 583 of 759
DATA
LINK
CONNECTOR
15,
VVHT/VEL
,26
RXDDATA
LK
15
W
NT/YEL
26
BR
/BLK
GR
IN
.
SIG
L2
I
i
f
7
BATTERVVOLT
~
f
~
FAULT
DSI
.X30
GRV/VEL
KICK-DOWN
SIG
MANMODESIG
1
Y;
EL/WHT
G
X3
!I
S1
RRNGSIGL4
S-PROGBUTT'
N
4YEL/GRN
GB
SHIFT
LK
GNOGN0
~BBRN/ORG
VOLTSUPPLY
2
Ri
ED/WHT
&
BLU
TCCSOLCTRL
BK
POL
POSIT
.
9
Ba
/
40
RED
HVDCTRL(a)
~-
41
GRV
HYO
CTRL
(-)
)
42
SOLVAL2CTRL
4~
X44
45
VIO
.AND
SOLVALICTRLI
~
TRANSMISSION
CONTROL
MODULE
(EGS)
PROGRAMSWITCH
88958
HOT
AT
ALL
ELECTRICAL
WIRING
DIAGRAMS
ELE-99
Transmission
Electronics
1995
3181,
3181C
&
3181s
rr~
Bt
I
'IpOIINTION
L
~J
VEL/BLU
BRN/ORG
2
HOT(NRUN
HOT
IN
RUN
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INADDY
.
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&
START
&START
START
1
VIC
SHIFT
LK
SOL
I
UTOMODESIG
YELIBLU
BRN
/
1
r
_
2
BRNGRV
G123
A
IGTIMINGINT
VALVE,
-IFRONTPOWER
F4BE
DISTRIBUTION
BOX
5-_5-J
----
Z32YZf1001
.8
.VNT/VI
COMPUTERDATA
~
1
WHT/
I
GRNI
I
GRN/
VIO/VEL
LINES
SYSTEM
"
WHT/GRN/
1
YEL
ANTI-LOCK
WHT
GRV
W/A50
BRAKES
"
VIO/VEL
ONLY
SYSTEM
I
W/CCM
W/DOOM
`
EGS
WARNING
IF15
GRV/BRN
21
WHT/BLK
WHT/BLK
WN
T
/I
VIO/~
VIO/~
I
PT=O~
___
__
_
~
FUELCONSUM
YEL
YEL
INSTRUMENTCLUSTER
Xlb
GRN/
OFN
1
_BRAKE
1
BRAKE
BLK
WHTWHT
r
(LIGHT
LIGHT
BRN
"
I
I
SWITCH
SWITCH
II
I
NTROLS
EN
INE
DISTRIBUTION
BOX
CO
SYSTEM
WHT1I-1
MODULERELAY
L_--__-J
FRONTPOWER
2
-
BLUIRED
BLUIREDr
SOLENOID
WHT/GRN/
O
5
BLU/REOI
EXTERIOR
RGNCA
ASCSIGNAL
VEL
"
BLU/Ep
i
LIGHTS
SOLENOID
7
VEL/GRN
VEL/GRN
22
SYSTEM
SPROGI
NO
"
-
I
VALVE2
-
(NOT
GRRNGSIGL3
&
BLU/WHT
USED,
BLU/RED
GRN
8
NCA
Xfi9
TIMEASSIG(FL)
WHT/BLK
A-PROGIND
10
YEL/BLU
"
YELIBLU
23
UE,
71
BRNIGRN
X83(NOT
I
PRESSURE
FLPMPRLVCTRL
3
USED)
I
REGULATOR
M-FROG
IND
12
YEL/WHT
RED
S
NCATx-DATALK
WHT/VIO
SPY
1~
NOA14BLK
YI
---
OUTPUTSPD(-)
I
SBRN/GRV
BK
5
W
TEST
SIG
)1B
OILTEMPSIG
1T
OLR
1B
SPOSENSSHONCA
I
19
BRNGNO
20
YEL
9l
OUTPUT
S
PD
(a)
A/CCOMPON
1DLK/BLU
~-
OILTPSIG(t)
26LK
GRRNGSIGL1
38
12
LU/BLK
BRN/GRN
r
-
85
_
J
I
FUELPUMPBELAY
I
j
BLKIBLU
-J
COMPRESSOR
I
CONTROLRELAY
I
I
I
___
I
RE-/WHTJ
.
.
-_
"
.
RED/WHT
_
5
r
I
I
`L
-_J
I
REDII
I
ENGINECONTROL
I
FN/.F'
VIO
2
NCAGRY
BRAKE
I
TORQUE
LIGHT
CONVERTER
ISWITCH
I
I
CLUTCH
I
.
I
I
SOLEN010
IJ
I
VALVE
-
W
BLU
T
NOA
4
BRNT
BRN
&
NCA
"
OIL
GRNI
I
TEMPERATURE
I
SENSOR
0200
1
BL
K
3
NCA
T
I
CLR
4'
NCA
II
SPEED
X8521
-~
VEL
A
NCA
SENSOR
T
~'
~~
BLK
2
INCA
"
xa53a
TRANSMISSION
VALVEUNIT
"
BRN/GRN
1r
-------
r
WHT/GRN/YEL
11___
I
FLPMPRLYCTRL
I
WHTIBLKGI
ION-BOARD
WHT/BLK
1TIDKV
I
COMPUTER
FUELCONSUMPTION
X3Plll
--
"
BLK/BLU
48
I
A/OCOMPCTRL
I
BRN/GRY
64I
I
BLK
BS
IIGNTIMINGINT
I
8-
DRIVE
RANGE
PIN
-
VIO
NCA
SHIFT
LOCK
2
r
WHT/GRN/
B
V
R
EL
N/
I
ENDNECONTROL
MODULE(DME)
I
VIO
1I
NCAQ
ANT
LOCK
1
l
l
13
~
I
1
I
s~srEM
0
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B
GRV/RED
2
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5
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I
I
OUT=U
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Ow
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I
GRY/
51
RED
INTERIORLIGHTS
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SYSTEM
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SOLGNOOTRL
4BRN
TPSSIGNAL
5
WHT/GRN/VEL
GRNIG
BRN/BLK
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2IE
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R
BRN/
EXTERIOR
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"Y'
I
GRY/
OF
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BRN/
BLU/VEL
BLU/VEL
3
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BLK
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25
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L2
L3
L4
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P
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LIGHT
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I
I
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N
111
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2
1
0
11
(MULTI-FUNCTION
1
00
1
0
G201
CLOCK)
Page 584 of 759
ELE-100
ELECTRICAL
WIRING
DIAGRAMS
DATA
LINK
CONNECTOR
1
51-1
HOTATALL
TIMES
15
WHTYEL
r
~Br
20
JUNCTION
,101=______
LA
______
T,
1
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_I
r_____
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-
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76
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SYSTEM
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G
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I
i
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7
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83364
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Page 654 of 759
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Page 750 of 759
WARNING
Your
common
sense,
good
judge-
ment,
and
general
alertness
are
cru-
cial
to
safe
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
front
of
the
manual
.
Review
these
warnings
and
cautions
each
time
youprepare
to
work
on
your
BMW
.
Please
also
read
any
warnings
and
cautions
that
accom-
pany
the
procedures
in
the
manual
.
A
ABS
(anti-lock
brakes)
See
Brakes
Accelerator
and
throttle
linkage
See
Maintenance
program
Air
conditioning
general
information
640-1
air
distribution
motor,
replacing
(rotary
knob)
640-10
air
distribution
motors
640-9
blower
motor,
removing/installing
640-1blower
motor
resistor
pack,
replacing
640-3
compressor,
replacing
640-12
compressor
clutch
640-13
condenser,
replacing
640-14
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
evaporator,
removinglinstalling
640-17
evaporator
temperature
sensor,
replacing
640-17
expansion
valve,
removing/installing
640-16
microfilter,
replacing
640-18
receiverldrier,
replacing
640-15
sensor
fan
forinterior
temperature,
replacing
640-9
warnings
and
cautions
640-11
Air
distribution
(flap)
motor
See
Air
conditioning
See
also
Heating
Air
filter
See
Maintenanceprogram
Airbag
system
(SRS)
general
information
721-1
contact
ring,
replacing
721-3
driver
side
airbag,removing/installing
721-5
front
crash
sensor,
replacing
721-4
front
side-impact
airbag,
removing/
installing
721-7
front
side-impact
airbag
crash
sensor,
removing/installing
721-5
passenger
side
airbag,
removing/
installing
721-6
sensors
and
electronics
721-1
SRS
warning
light
and
fault
display
721-2
systems
721-1
ZAE
control
module,
replacing
721-5
Alarm
system
See
Central
locking
and
anti-theft
Alternator
See
Battery,
starter,
alternator
Anti-freeze
(Engine
coolant)
See
Maintenance
program
Anti-theft
See
Central
lockíng
and
anti-theft
AST
(Al¡
season
traction)
300-4
ATF
(Automatic
transmission
fluid)
See
Automatic
transmission
Automatic
transmission
See
alsoTransmission-general
general
information
240-1
ATF,draining
and
filling
240-2
ATF
leve¡,
checking
240-1
transmission
removaland
ínstallation
240-4
transmission,
removinglinstalling
240-4
transmission
service
240-1
Auxiliary
fan
See
Cooling
system
Axle
joint
See
Maintenance
program
B
Back-up
light
switch
See
Manual
transmission
Balljoint
See
Front
suspension
Battery
See
Battery,
starter,
alternator
Battery,
starter,
alternator
See
also
Maintenance
program
general
information
121-1
alternator,
removing/installing
(4-
cylinder
engine)
121-5
alternator,
removinglinstalling
(6-
cylinder
engine)
121-6
alternator
brushes,
inspecting/
replacing
121-7
alternator
service
121-4
batterycharging
121-4
battery
load
voltage
test
121-4
batteryopen-circuit
voltage
test
121-4
battery
service
121-3
INDEX
1
Battery,
starter,
alternator
(cont
.)
battery
testing
121-3
charging
system
quick
check121-2
charging
system
troubleshooting
121-
2
hydrometer
testing
121-3
solenoid
switch,
removinglinstalling
121-10
starter
service
121-7
starter
troubleshooting
121-7
starter,
removing/installing(4-cylinder
engine)
121-8
starter,
removing/installing(6-cylinder
engine
with
automatic
transmission)
121-9
starter,
removing/installing
(6-cylinder
engine
with
manual
transmission)
121-8
static
current
draw,
checking
121-2
voltage
regulator,
removing/installing
121-6
Bearing,
wheel
See
Front
suspension
or
Rear
suspension
Blowermotor
See
Air
conditioning
See
also
Heatíng
BMW
emblem
See
Exterior
trim,
bumpers
Body-general
general
information
400-1
body
assembly
400-1
central
body
electronics
400-4
convertible
models
400-2
coupe
models
400-2
electronic
immobilizatíon
system
400-
4
exterior
and
aerodynamics
400-2
heating
afhdair
conditioning
400-5
instruments
and
controls
400-4
interior
equipment
400-3
seats
and
seatbelts
400-3
Body
side
molding
See
Exterior
trim,
bumpers
Brake
fluid
See
Maintenance
program
Brakes
general
information
340-1
antilock
brake
system
(ABS)
340-11
inspection
340-12
wheelspeed
sensors,
replacing
340-12
bleeding
brakes
340-3
brake
booster,
removinglinstalling
340-8
brake
caliper,
removing/installing
340-6
brake
pads,
calipers,
and
rotors
340-3
brake
pads,
replacing
340-4
brake
rotor,
removing/installing
340-7
master
cylinder,
removing/installing
340-7
parking
brake
340-10
adjusting
340-10
.
cable,
replacing
340-11
shoes,
removinglinstalling
340-11