auxiliary battery BMW 318i 1997 E36 Workshop Manual

170-2



RADIATOR
AND
COOLING
SYSTEM

Cooling
Fans



TROUBLESHOOTING

Belt-driven
coolingfan
.
The
primary
cooling
fan
is
belt-

driven
.
It
is
mounted
to
the
frontof
the
coolant
pump
through
a

fan
clutch
.
The
fan
clutch
is
a
viscous
fluid
coupling
that
con-

trols
the
speed
of
thefan
based
on
engine
compartment
tem-

perature
.

Electric
cooling
fan
.
Models
with
M44
engine
and
stan-

dard
transmission
substitute
an
electric
fan
for
the
belt-driven

viscous
fan
.
This
is
attached
to
the
rear
of
the
radiator
and

controlledvia
the
DME
5
.2
engine
management
system
.

NOTE-

The
electric
cooling
fan
in
these
models
is
activated
by
the
engine
control
module
(ECM)
.

Auxiliary
coolingfan
.
In
al¡
models
a
two-speed
electric

auxiliary
cooling
fan
is
mounted
behind
the
front
grill
and
in

front
of
the
radiator
.
This
fan
is
primarily
used
for
the
A/C
sys-

tem,
but
also
operates
when
the
coolant
temperature
ex-

ceeds
a
predetermined
leve¡
.

Warnings
and
Cautions

The
following
warnings
and
Cautions
should
beobserved

when
working
on
the
cooling
system
.

WARNING
-

"
Atnormal
operating
temperature
the
cooling
sys-
tem
is
pressurized
.
Allow
the
system
to
cool
as
long
as
possible
before
opening-a
minimum
of
an
hour-then
release
the
cap
slowly
to
allow
sale
release
of
pressure
.

"
Releasing
the
cooling
system
pressure
lowers
the
coolants
boiling
point
and
the
coolant
may
boíl
suddenly
.
Use
heavy
gloves
and
wear
eye
and
laceprotection
to
guard
against
scalding
.

"
Use
extreme
care
when
draining
and
disposing
of
engine
coolant
.
Coolant
is
poisonous
and
lethal
to
humans
and
pets
.
Pets
are
attracted
to
coolant
because
of
its
sweet
smell
and
taste
.
Consult
a
veterinarian
immediately
if
coolant
is
ingested
byan
animal
.

CAUTION-

"
Avoidadding
cold
water
to
the
coolant
while
the
engine
is
hot
or
overheated
.
If
it
is
necessary
to
add
coolant
to
ahot
system,
do
so
only
with
the
engine
running
and
coolant
pump
tuming
.

"
Prior
to
disconnecting
the
battery,
read
the
bat-
tery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.

TROUBLESHOOTING

Most
cooling
system
faults
can
be
grouped
into
one
of
three

categories
:

"
Cooling
system
leaks

"
Poor
coolant
circulation

"
Radiator
cooling
fan
faults

When
investigating
the
cause
of
overheating
or
coolant

loss,
begin
with
a
visual
inspection
.
Be
sure
to
check
the
con-

dition
and
tension
of
the
coolant
pump
drive
belt
.
Check
hoses

for
cracks
or
softness
.
Check
clamps
for
looseness
.
Check

the
coolant
leve¡
and
check
for
evidence
of
coolantleaks
from

the
engine
.

Check
that
the
radiator
fins
are
not
blocked
with
dirt
or
de-

bris
.
Clean
the
radiator
using
low-pressure
water
or
com-

pressed
air
.
Blow
outward,
fromthe
engine
side
out
.

Inspect
the
coolant
pump
by
first
removing
the
drive
belt

from
the
pump
.
Firmly
grasp
opposite
sídes
of
the
pulley
and

check
for
play
in
all
directions
.
Spin
the
pulley
and
check
that

the
shaft
runs
smoothly
.

NOTE-

The
coolant
provides
lubrication
for
the
pump
shaft,
soan
occasional
drop
of
coolant
leaking
from
the
pump
is
acceptable
.
If
coolant
drips
steadily
from
the
vent
hole,
the
pump
should
be
replaced
.

The
cooling
system
becomes
pressurized
at
normal
operat-

ing
temperature,
which
raises
the
boiling
point
of
the
coolant
.

Leaks
may
prevent
the
system
from
becoming
pressurized,

allowing
the
coolant
to
boil
at
a
lower
temperature
.
If
visual
ev-

idence
is
inconclusive,
a
cooling
system
pressure
test
can

help
to
pinpointhard-to-find
leaks
.

If
the
cooling
system
is
full
of
coolant
and
holds
pressure,

the
next
most
probable
cause
of
overheating
are
:

"
Faulty
radiator
fan

"
Loose
or
worn
drive
belt

"
Failed
thermostat
or
coolant
pump

"
Clogged/plugged
radiator
or
coolant
passages
.

NOTE
-

"
Some
early
style
coolant
pumps
were
fitted
wíth
fi-
berlplastic
type
impellers
.
Over
time,
this
impeller
can
wear
away
and
result
in
overheating
.
The
plastic
im-
peller
can
also
slip
or
free-wheel
on
the
pump
shaft
.
If
the
engine
overheats
and
no
other
faults
canbe
found,
theold
style
impeller
may
be
the
cause
of
the
problem
.

"
Only
pumps
with
the
updated
metal
impeller
should
be
used
for
replacement
.

NOTE-

Some
cars
covered
by
this
manual
may
have
an
alter-
nate
cooling
fan
switchwith
switching
temperatures
of
176%190W
(80%88°C)
.
When
replacing
the
switch
check
theswitching
specifications,
whichshouldbe
stamped
on
the
switch
body
.

1
.
If
coolant
is
circulating
at
normal
operating
tempera-
ture,
but
auxiliary
cooling
fan
does
not
run,
disconnect
connector
from
radiator
temperature
switch
and
make
tests
listed
in
Table
c
.

Table
c
.
Auxiliary
Cooling
Fan
Temperature

Switch
Tests

Wires
jumpered



Test



Test
resuits
conditions

Black/green
(terminal2)
and



Ignition
ON



Fan
runs
on
brown
(terminal
1)



low
speed

Black/gray
(terminal
3)
and



Ignition
ON



Fan
runson
brown
(terminal



I
1)



high
speed
2
.
If
fan
runs
only
when
powered
directly
by
jumpered
connector
and
hot
coolant
is
circulating
through
radia-
tor,
radiator
temperature
switch
is
most
likelyfaulty
.
Use
a
new
sealing
ring
when
replacing
switch

Tightening
Torque

"
Temperature
switch
to
radiator
......
15
Nm
(11
ft-Ib)

3
.
If
auxiliary
fan
does
notrun
when
powered
directly,
check
for
battery
voltage
at
temperature
switch
connec-
tor
(black/green
wire)
with
ignition
on
.
If
battery
voltage
is
not
present,
check
fuses
.
See
610
Electrical
Com-
ponent
Locations
.

RADIATOR
AND
COOLING
SYSTEM



170-
5

~r~nmm
a
00
0

Fig
.
4
.



Auxiliary
radiator
cooling
fan
low
speed
relay
(1)
and
high
speed
relay
(2)
in
power
distribution
box
.
(Relay
locations
may
vary
.)

Auxiliary
Cooling
Fan
Circuit
Fuses



Fig
.
5
.
Auxiliary
radiator
fan
resistor
(arrow)
.
"
Fuse16
.
...................
..
..
...
...
.5
amp

"
Fuse
41
(ex
.
M44
w/man
.
trans)
.
..
.
..
.....
30
amp

"
Fuse
48
(M44
w/man
.
trans
.
only)
..
.
..
.....
40
amp



COOLING
SYSTEM
SERVICE

0013034

4
.
If
no
faults
are
found,
remove
low
speed
relay
and
turn



Coolant,draining
and
filling

ignition
ON
.
See
Fig
.
4
.



1
.
Remove
expansion
tank
cap
.
Set
temperature
controls
"
Check
for
power
at
terminal
30
and
terminal
86
of
relay



to
full
warm
.
socket
.

"
Reinstall
low
speed
relay
and
repeat
testat
high
speed



WARNING
-
relay
socket
.
Fix
any
wiring
faults
found
.



Allow
the
cooling
system
to
cool
before
openlng
or

On
early
productioncars
(up
to
9/92)
:
If
fan
operates
only
on



draining
the
cooling
system
.

high
speed
and
no
electrical
faults
have
been
foundup
to
this
point,
usean
ohmmeter
to
check
that
fan
resistor
is
not
electri-



2
.
Place
3
ra
allo

ug
.



beneath
radiator
drain
plug
and
re-

cally
open
.
Resistor
is
mounted
on
auxiliary
cooling
fan
housing



move
drain
plg
.
See
Fig
.
6
.

behind
front
grille
.
See
Fig
.
5
.
Wiring
diagrams
for
the
radiator

cooling
fan
canbefoundunder
Electrical
Wiring
Diagrams
.



3
.
Place
3-g



pail
beneath
rear
of
engine
blo
.
Loos-
en
and
re

mlon

ove
engine
blockcoolant
drain
plug
k
.

COOLING
SYSTEM
SERVICE

EWS
II
transmitterlreceiver
module,

replacing

1
.
Disconnect
negative
(-)
cable
from
battery
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
onpage
viii
.

2
.
Remove
lower
left
dash
trim
panel
and
knee
bolster
as
described
in
513
Interior
Trim
.

3
.
Unclip
auxiliary
relay
panel
under
steering
column
and
lower
it
to
access
relays
and
harness
connectors
.
See
Fig
.
24
.

Fig
.
24
.
Lowering
the
left
side
auxiliaryrelay
panel
.

CENTRAL
LOCKING
AND
ANTI-THEFT



515-11

0013164

4
.
Disconnect
harness
connector
from
transmitter/receiv-
er
module
.
Unclip
module
from
panel
.
See
Fig
.
25
.

5
.
Installation
is
reverse
of
removal
.

0
A

0013035

Fig
.
25
.
Position
of
EWS
II
transmitter/receiver
module
(A)
on
left
side
auxiliaryrelay
panel
.

LOCKING
SYSTEM
AND
ELECTRONIC
IMMOBILIZATION

610
Electrical
Component
Locations

GENERAL
...........
.
.
.
.
.
.
.
.
.
........
610-1



FOSE
POSITION
TABLES
..
.
.
.
.
.
.....
.
610-19

FUSE
AND
RELAY
POSITIONS
.
...
.
.
.
.
.
610-1

Fuse
Positions
.
.
.
................
.
.
.
.
.
610-1

Relay
Positions
.
.
.
.....
.
.
.
........
.
.
.
.
.
610-2

Auxiliary
RelayPanel
.....
.
...
.
........
.
610-2

SplicePanel,
Left
.
.
.
...
.
.
.
...
.
........
.
610-2

SplicePanel,
Right
.
.
.
.
.
.
.
.
...
.
.........
610-3

COMPONENT
LOCATIONS
.
.
.
.
.......
.
.610-3

Component
Location
Table
.
.
.
.
.
.
.........
610-9

GENERAL



FUSE
AND
RELAY
POSITIONS

This
repair
group
covers
f
use,
relay,
and
control
module
lo-



The
front
power
distribution
box,
an
auxiliary
relay
panel,cation
information
.
Electrical
equipment
and
accessories
in-



and
two
auxiliary
splice
panels
contain
most
of
the
fuses
and
stalled
varies
depending
on
model
and
model
year
.
Always



relays
in
E36
vehicles
.
Refer
to
the
component
location
later

confirm
that
the
proper
electrical
component
has
been
identi-



in
this
section,
as
well
as
the
tables
at
the
end
of
this
repair

fied
by
using
the
electrical
wiring
diagrams
.



group
for
electrical
component
location
.

WARNING
-

On
cars
equipped
with
airbags,
special
precautionsapply
to
any
electrical
system
testing
orrepair
.
Air-
bag
units
areexplosive
devices
and
mustbe
han-
dled
with
extremecare
.
Before
starting
any
work
onan
airbag
equipped
car,
refer
to
the
wamings
and
cautions
in
721
Airbag
System
(SRS)
.

CAUTION
-

"
Prior
to
disconnectiog
the
battery,
read
the
bat-
tery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.

"
Relay
and
fuse
positions
are
subject
to
changeand
may
varyfrom
car
to
car
.
If
questions
arise,
an
authorized
BMW
dealer
is
the
best
source
for
the
most
accurate
and
up-to-date
information
.

"
A
good
way
to
verify
a
relay
position
isto
com-
pare
the
wiring
colors
at
the
relay
socket
to
thecolors
indicated
on
the
wiring
diagrams
located
at
the
rear
of
this
manual
.

"
Always
switchthe
ignition
off
and
disconnect
the
negative
(-)
battery
cable
before
removing
any
electrical
components
.

"
Connect
and
disconnect
ignition
system
wires,
multiple
connectors,
and
ignition
test
equipment
leads
only
while
the
ignition
is
switched
off
.

"
Only
usea
digital
multimeter
for
electrical
tests
.

ELECTRICAL
COMPONENT
LOCATIONS



610-1

TABLES
a
.
E36Component
Locations
...........
.
.
..
...
610-10b
.
1992
E36
Fuse
Positions
..........
..
.
.
.....
610-20c
.
1993
E36
Fuse
Positions
..........
..
..
.
....
610-22d
.
1994
E36
Fuse
Positions



.........
...
.......
610-24e
.
1995
E36
Fuse
Positions
.........
...
.......
610-26
f
.



1996
E36
Fuse
Positions



.........
...
.......
610-28g
.
1997-1998
E36
Fuse
Positions
..
.
..
...
.......
610-30

Fuse
Positions

CAUTION
-

"
Replace
fuses
with
those
of
the
same
rating
.
In-
stalling
a
fuse
with
higher
rating
can
lead
to
cir-
cuit
failure
and
may
also
start
a
fire
.

"
Relay/fuse
positions
vary
by
model
and
equip-
ment
.

Fuses
number
1
through
46
are
mounted
in
the
front
power

distribution
box
.
See
Fig
.
1.

Fuses
31-46

~
Illlllllllll

°
-
Ilmmlmomlmoi

Fuses
1-20

(a
1
:1
E
El

~
~O!7

L~~n

4~
i
Fuses
21-30

Fig
.1.



Fuse
positions
1-46
in
front
power
distribution
box
.

0013034

FUSE
AND
RELAY
POSITIONS

ELE

Power
E

1994-95
Exc

JMPSTART



B+JUMP
START
C710NPOINT



RED
JUNC710NPOIN7
RED

REO

.,
.
..
Fil
-----------

FUSIBLE



I
-
I
I
-I



CONNECTOR
I



LINK



B
LINK
m



D
¢



GENERATOR
STARTER
RED
x1994
W/TRUNK



W/ENGINE



W/TRUNK



RED
+
.
-
MOUNTED



MOUNTED



I~
BATTERY



MOUNTED
RED
BATTERY



61
81



w
_¢



BATTERY
o
B+



.
.'S
.
JS
_



JUONCINT
TION
I



I



B+_



I



I
I



P



I



I



-
JUNCTION
_



POINT
BATTERY



I



II



-



-_-
I



-
0



ENGINECON7ROL
¢
JUNCTION
GEN-
STARTER



MODULERELAY
1994



POINT
ERATOR



x1995



BATTERY
REO

Iffm

BATTERY



+
"



1
o



FUEL'w



PUMP/
I
B



w



w



START
I



I
mm



O



0



~
~
Y



¢¢ww



r'



19941995



RELAY
¢



Lz
(
PUMP



2



2fi
7
¢



¢



I
R
r
ELAY



14



14



r



2
'



8



I
1



(
P/
M
i
II



w



-



yJ



DATA
LINK



DATA
LINK



I



I



I~



SPT
U
ART
I



CONNECTOR
CONNECTOR



FUEL



I
I
14



22
PUMP



-_I



_--
IJRELAYm
_--I



O



I
RELAY



ENGINE



I
ENGINE
DATALINK



CONTROLCONTROL
CONNECTOR



-



MODULEj
MODULE



2
RELAY
-



S'
28



B



28



28



BB



86



1



DATA
LI
NK
II



I2
I



I



I



I



I



I
_



__



__



__



m



C.
NN
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
ENGINETRANSMISSION



OXYGEN



ENGINE
TRANSMISSION
ENGINECONTROL



ENGINECONTROL
DOUBLE
CONTROL



CONTROL



SENSOR



CONTROL



CONTROL



MODULERELAY



MODULE
BELAY



RELAY
MODULE



MODULE
(EGB)



RELAY



MODULE



MODULE(EGS)



O



STARTER



GENERAT
(4CYL)

3181,37815,



3251,3251
.,



M3
3181
CONVERTIBLE



3251
CONVERTIBLE

GRN/VIO
RED
15
P1B



FRONT
POWER
USE



-1



I
DISTRIBUTION
BOX

-
-
-
---
--
-
---
-
-
-
-
-
-
-
-
-
---
--
-
---
-
---
-
-
-
-
-
-
-
-
-
-
-
-
----
-
-
-
-
-
-
-
-
-----

---
g



TO
FUSE
15



C



RED



RED



X



TO
FUSEF47
-



1.20
(DIAGRAM50F5)



(DIAGRAMSOF5)



S
TOCOMFORTR
TO
FUSEF40



0



RED



TO
TUBEF20



B



RED



(DIAGRAMSOF
(D(AGRAM
5
0F
5)



(DIAGRAM
5
0F
5)



R



1994
I



TO
'
.BE
P
.1
70
FUSE
F3



E



RED



TO
IGNITION
SWITCH



A



RED



"



(DIAGSAM4OF
(DIAGRAM5OF5)



ID
IAGRAM2OF5)



J



70
FUSE
FB
(DIAG
RAM
4
OF
2
TO
FUSEFI9



F



RED
I
I



(DIAGRAMSOF5)
I



I



TO
FUSE-



G



RED
I
-
I



(DIAGRAMSORS)
TOFUSEF39
RED
FUEL
PUMP



(DIAGRAMSOFS)
H

fi



6



g



(DIAGRAMSOFSTOFUSE
'48
I
Y
RED

(1
O



I



FRONT



HIGH



99
5)
RED
¢BEAM



FOG



I
BEAM



8



7



3
(



LIGHT



I



(
LIGHT



I



(
LIGHT
RELAY



I



j~(
RELAY



I~
~j
RELAY



r



FUBE



FUSE



FUSE
I
FRONTPOWER
OISTRIBUTIONBCX
2
I
F4



14



F25
NOTUSED



5



2



2



5



S



2

_
CANADA



3



v
8



B



4

M



L



K



18



8



3



2
TOFUSEF11



TOFUSEFIS



TOFUSEF29
I
I



I



I



AUXILIARY
(OIAGRAMSOFS)



(DIAGRAM
5DF5/



(DIAGRAM
SOBS)



I



I



I



I



I



I



CONNECTOR
V
I
_I



_
I



-I



(19)

BODY
ELECTRONICS



UNLO
I
ADERRELAY



BODY
EI
LCTRDNCS
TOFUSEFI7



CONTROL



TERMINAL15



CONTROL
IDIAGRAM50F5(



MODUL
.(ZKEIV)



MODULE(ZKEIV)
83172



-

FROM
BATTERY



FROMFUEL
PUMP
RELAY



FROM
BATTERY
(DIAGRAM
1OF5)



(DIAGRAM
10F5)



(DIAGRAM
1OF5)



SECONDARY
AIR
PUMP
RELAY
C



(1997
328,
M3)
RED
2
I



I
T
.E
.



RED



RED



I
-
I
,1



,5
8
J~
AUXILIARY



FRONTPOWER
I



FUSE



I
FUSEBOX



F



FUSE



I
DISTRIBUTION
BOX
I



F78



I



I



F49



--------_
-



---------_



I
I
20A
-
I



I
15A
_____
_-____________-___
______
_____
____
2



1S
~--,997

10



2



;



5



7



17
.1c
FRONTPOWER
I



I



I



I



FUSE



FUSE



FUSE



FUSE
I
DISTRIBUTIONBOX
I



II



I
F1



F13



F74



F19
I
_I



_
I



_I



I



30A5
A___
30A
-
I
CONVERTTIBLE



PUP,



28818
TOPCONTROL



PUMP
MODULE



O



O>



¢I



o
(1997328)

t



$



1



fi~e~



B



,
s
TO
FUSE
FS



TO
IGNITION



TO
FUSE
F20
(DIAGRAMSOF5)



SWITCH
(DIAGRAM
30F5)



(DIAGRAM
40F5)
(1997)



I



I



I



I



I



I



II
-I
I
---
I
I
-I
I
-
1
7



v
SUNROOF
COMFORT
SOOY
RELAY
TOFUSEF35



TOFUSEFS



CONTROL
RELAY
ELECTRONICS
MODULE
(DIAGRAM50F5)(DIAGRAM5OFS)



ASSEMBLY
(1997)
CONTROLMODULE
-__---__-4-----_--
"
-
1

__



____-____
1
9



__
_
_
5
l
7
_~I_



______



___



_
9



5



7



2,



,7
1
r



FRONTPOWER



r
I



-
AUXILIARY
I



FUSE



FUSE



FUSE



FUSE



USE



FUSE



FUSE-1
DISTRIBUTION
BOX



I



FUSE



I
FUSE
BOX
I



F5



F40



F3



FUSE



4



F61



F39
I



I
F68
I
I



I
__



3_A_____-___
303-A
-__
30A


530A
___



_5_j



I



40=,

I



10



20



fi



68



22



18
O_

I
w



W

III



5



3
~,997

II



I



i



I



i



I



5
l
i
.



1'

4

i



1



4



1



1



8

i



1
6
1



1

8



8
i



1
i
I
I


I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I
I_I



!
_I



!
_I



L-1



I
!
_I



!
_I



_I
RIGHTSEAT



LEFTSEAT



LEFT
SEAT



WIPERI



HEADLIGHT/



UNLOADER



HIGHBPEED



COMPRESSOR



HIGH
SPEED
CONTROL
LUMBAR
CONTROL
WASHER
FOGLIGHT
RELAY
RELAY
CONTROL



RELAY
SWITCH
SWITCH
SWITCH
MODULE
CLEANING



(328,M3)
RELAY



(318)
(1997)
MODULE(SPA)
I



(1998)

--
----------
-----------------III
-
-------____-__--------

REDS



RE
-



RED

-t



t

HIGH



~F



FRONT



LOW
BEAM



I
/
J



I
FOG



I
BEAM
~
I
LIGHT



I
(



I
LIGHT



I



I
LIGHT
I_'
-
_
_ZJ
RELAY



If



t-~
I
RELAY



I



RELAY
TOFUSEF47
(DIAGRAM
40F5)



_
RED/WH
;



RED/YEL
L
VEL/B17


1998



VE'



SNOTUSEO
CANADA
_
____



IFRONT
,
GWER
DISTRIBUTION
BOX
I



FUSE



FUSE



FUSE



FUSE



FUSE



FUSE
I
F-O---_
f2-_-_____________
P7_F17



F12
]
FIl
-
7
.SA



7.SA



15A
tOA---------
7
.SA-------
7
.5=~

2.



18



10



to



4



2
_



VEL/RED



YEL/GRY~
m



O



OR



OR
h



r



~,99fi



VEL/BLU



YELIGRN
3
B



CANADA
W/OCCM
W/CCMW/CCMW/OCCM

18



2



2

I



I



I



I



I



I



'
e



z



r

>
1s



B



>

I
BODVELECTRONICS
RIGHTHIGH
LEFTHIGH



'~
IIII



I
II



I
II
CONTROL



BEAM
LIGHT



BEAM
LIGHT



EDQLIGHT



FO
.
LIGHT



I



-I



I



_I



I



_I



I



__



_~



I



_I
MODULE(ZKEIV)



_
__--
INSTRUMENT



REARFOG



LEFT
LOW



CHECK
CONTROL



RIGHT
LOW
CLUSTER



LIGHTSWITCH



BEAM
HEADLIGHT



MODULE



BEAM
HEADLIGHT
88975

ELECTRICAL
WIRING
DIAGRAMS
ELE-15

Power
Distribution

1996-97
Except
318ti
(2
of
5)

10437
0

FUSE
LINK
80A

BATTERY

FUSE
LINK
BOA

4
26

-
AUXILIARY
I



FUSE



I
FUSE
BOX
I
(,
F4.
I
I
Z
2CA

27X19564

_RED
RED

_
REDRED
51X
10016

61X
10816

I
-
1



I
-
1
I



I



I



1
_I



LI
CONVERTIBLE
TOPCONTROLMODULE

ELECTRICAL
WIRING
DIAGRAMS
ELE-19

Power
Distribution

1998Except
318ti
(1
of
5)

FUEL
PUMP

161
X111010

FUEL
PUMP

15~X
1DD16
-
FRONT
POWER
I



USE



I
DISTRIBUTION
BOX
I



FIB



II
T15A

14j
,
61BI



261



261



6~



4I
DATA
LINK



I



I



I



I



I



I



r



(
FUEL



I



I



I



I
Pmp
I
CONNECTOR
I



1



I



I



I



I



I
f



(RELAY
I



I



I



II



___I



!
_I



!
_I



!
f
_
zJ



!
_
I



!
_I



!
_I
ENGINE



ENGINE
TRANSMISSION

21



STARTER
GENERATOR
UNLOAD-
-



CONTROLCONTROL
CONTROL



RELAY
-



MODULEMODULE
MODULE
O
RELAY

BtJUMPSTART
JUNCTION
POINT

I
I



I



I



I
I
DATALINK
r



FUEL
I
I



I
I
I



I
CONNECTOR
(



(RELAY
PUMP
1



1



I



I



I



I
_I



!
___I



!
_I



I
(((
_
sJ



!
_I



!
_I



!
_I
ENGINEENGINE
TRANSMISSION



UNLOAD-
STARTER
GENERATORCONTROL
CONTROLCONTROL



O
RELAY
MODULE



MODULE



_
MODULE(EGS)RELAY

BtJUMPSTART
JUNCTION
POINT

FRONTPOWER



¢



¢
I



FUSE



I
DISTRIBUTIONBOX



_
"
I



F'A



I



3231CONVERTIBLE,
3231.
.



I



3181
1



8
=
--
I



3281,
3281C
ONVERTIBLE,
-



32815
.
M3

TOFRONT
DISTRIBUTION
BOX
(DIAGRAM
2
OF
5)

ELE-32
ELECTRICAL
WIRING
DIAGRAMS

7

FUSE
LINK

BATTERY

10442
8
2
O
0

15IX74419
-------------
FRONTPOWER
FUBE



I
DISTRIBUTIONBOX
I
15A

1~sTxLn91B



^
------------------

4
2x0
AUXILIARY
FUSEBOX
I



FUSE
I
I
F47
I
-
30-J
19254

RED
JUNCTION
POINT
B.
JUMP
START

TOFSEFB
(DIAGRAM
20F3)

TO
FUSE
F3
.



TOFUSE
F
.
(DIAGRAM(DIAGRAM
2
T
30F3)
30F3)

I

Power
Distribution

1998
318ti
(1
of
3)

I



I



I



!



I



II



I



I



I



I



!



I



I



I



I



I



I

UNLOADER



ENGINE
ENGINE
TRANSMISSION
GENERATOR
STARTER



2
RELAY
CONTROLCONTROLCONTROL
MODULE
MODULE
MODULE(EGS)
HOME)
RELAY

1588



71XSnn]5
17~X1D018
7~XLQOifl



1~X1DD15
TO
IGNITION



I



TO
FUSE
F20



r



7IC



I
AU%ILIARV



I
-



-
FRONTPOWER
FUSEFUSEBO



SE
F89E
F
USE



FUSE
SWITCH
(DIAGRAM



I
X



iDISTRIBUTIONBOX
F4
IF14


FI
(0)M
I
20F3)0
20F3



I
_Y'__J



5
___-
7
.SA
-__
30A
-___
-_



30__I

FUEL



HIGHS
PEED



UNLOADER



COMPRESSOR



BODY



SUNROOF



SUNROOFPUMP



RELAY



RELAY
CONTROL
ELECTRONICS
CONTROL
CONTROL
RELAY
CONTROLASSEMBLY
ASSEMBLY
MODULE
(ZKEIV)

____________-__-__

81
..
.+++
HIGH



FRONT
...
LOW
/
T
BEAM



I
I
FOG



I
(
BEAM
I
f



I
LIGHT



I



(
LIGHT



I



(
LIGHT
-
~J
RELAY



I



-~
I
RELAY



I



-~
I
RELAY

RED

I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



-
FDGLFGHTBODY
ANTI-THEFT
REAR
WIPER/
RIGHT



LEFT
PASSENGER'S
DRIVER'S
ELECTRONICS
CONTROL
WIPER/
WASHER
HEADLIGHT
HEADLIGHT



SEAT



SEAT
CONTROLMODULE
WASHER
MODULE



CONTROL
CONTROL
MODULE



CONTROL



SWITCHSWITCH
(ZKEIV)



MODULE

RED

t-_-_______

21x7588



BIX
1
.
ts



Is
x1DDIB



elx1n9~6



21
1DD1B

SUNROOF
ROOF
Bl



Bt



81



1~



2~
_

I



~



I



~



I



~



I



~



I



~



II



I



I



I



I



I



I



I



I



I



I



I

---
---------
I
FUSEFUSEFUSEFUSEFUSE

!
_[F3



75
.
._
753_A3__-_______
fi7x14n]5
.



20Y



18
X7
D91Z



t0YX1901B
.



20x1491&



t0

SECONDARY
AIR
PUMP
RELAY

2

3

-



I



I



I



I



I



I
RIGHT
FOO
LIGHT
INSTRUMENT
RIGHT
LEFT
CLUSTER
HEADLIGHTHEADLIGHT

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

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