distribution point BMW 318i 1992 E36 Workshop Manual

ELECTRICAL
CHECKS
AND
COMPONENT
TESTING

Main
relay,
testing

The
main
relay
is
energized
via
the
engine
control
module

and
supplies
plus
(+)
power
to
the
many
of
the
engine
man-

agement
components
and
subsystems,
including
the
fuel

pump
relay
.
If
this
relay
is
faulty,
the
engine
will
not
start
.

1
.
With
ignition
off,
remove
main
relay
.
See
Fig
.
6
.

.

iommooommmoi



~
"""

Fuel
DME
sensor

CA
UTION-

Relay
positions
can
vary
.
Be
sure
to
confirm
relay
position
by
identífyíng
the
wiring
in
the
socket
us-
ingthe
wiring
diagramsfound
at
the
rearof
this

manual
.

0013034)
Fuel
pump
relay,
testing

FUEL
INJECTION



130-
7

87

851186

30
~j

1
.
Remove
fuel
pump
relay
from
its
socket
.

87661

Fig
.
7
.



Check
for
battery
voltage
at
main
relay
terminals
30
and
86
.
Voltage
should
be
present
at
all
times
.

4
.
With
ignition
on
and
relay
installed,
check
for
battery

voltage
at
terminals
87
.

"
If
battery
voltage
is
present,relay
has
energized
and
is

functioningcorrectly
.

"
lf
battery
voltage
is
not
present
and
al¡
earlier
tests
are

OK,
relay
is
faulty
and
should
be
replaced
.

Fig
.
6
.



Engine
management
relays
in
the
power
distribution
box,
left
rear
of
engine
compartment
.



The
fuel
pump
relay
is
located
in
the
power
distribution
box
.

Refer
to
Fig
.
6
.

The
ECM
supplies
power
to
the
coil
side
of
the
fuel
pump
re-

lay
.
During
starting,
the
fuel
pump
runs
as
long
as
the
ignition

switch
isin
the
start
position
and
continues
to
run
once
theen-

gine
starts
.
If
the
relay
ís
faulty
the
fuel
pump
will
notrun
.

2
.
Check
for
voltage
at
terminal
30
and
terminal
86
of
re-

¡ay
socket
.
See
Fig
.
7
.



2
.
With
key
off,
check
for
batteryvoltage
at
socket
terminal

"
If
battery
voltage
is
present
continue
testing



30
.
See
Fig
.
8
.

"
lf
battery
voltage
is
not
present
at
either
point,
check

large
red
wire
in
relay
socket
.
See
Electrical
Wiring



3
.
With
ignition
key
in
start
position
check
for
battery
volt-

Diagrams
.



age
at
terminal
86
.

NOTE-



4
.
With
ignition
key,
use
digital
multimeter
to
check
for

The
wiring
to
terminals
85
and
86
in
the
main
relay
may



ground
at
terminal
85
.

be
reversed
.
Electrically,
the
relay
functions
either
way
.

lf
voltage
ís
not
present
at
terminal
86,
check
for
volt-



NOTE-
age
at
terminal
85
.



The
ground
atterminal
85
is
switched
by
the
ECM
.
The

ECM
hamess
must
be
connected
to
check
the

3
.
Reinstall
relay
and
turn
ignition
on
.
Gainaccess
to
un-



switched
ground
connection
.

derside
of
relay
socket
and
check
for
ground
at
terminal

85
(brown
wire)
.



5
.
If
no
faults
are
found
up
tothis
point,
testfuel
pump
op-

"
lf
ground
is
present
continue
testing
.



eration
as
described
in
160
Fuel
Tank
and
Fuel
Pump
.

"
If
ground
is
not
present,
signal
from
ECM
is
missing
.

Check
wire
between
ECM
and
relay
.
If
no
faults
can

be
found,
ECM
may
be
faulty
.

ELECTRICAL
CHECKS
AND
COMPONENT
TESTING

Fig
.
9
.



Fuel
pump
relay
terminal
identification
.

Fuel
Pump
Electrical
Tests

Troubleshooting
of
any
fuel
pump
fault
should
begin
with

checking
the
fuel
pump
fuse
and
the
fuel
pump
relay
.
The
DME
main
relay
should
also
be
checked
.

NOTE-

Special
tools
are
requíred
for
some
of
the
tests
de-
scribed
here
.

Fuel
pump
electrical
circuit,
testing

The
fuel
pump
electrical
circuit
diagram
is
shown
in
Fig
.
10
.

3
.
If
fuel
pump
does
not
run,
disconnect
black
harness

connector
from
tank
sender
unit
.
With
jumper
wire
con-

nectedas
described
in
step
2
above,
check
for
positive

(+)
batteryvoltage
at
harness
connector
terminals
.
See
Fig
.
11
.

FUEL
TANK
AND
FUEL
PUMP



160-
7

From
Main
Relay
(+15
power
with
key
in
run



From
B+juretion
point
orstartposition)
(batteryvoRageatalltirnes)

'
.5
RD/Nrr



1
.5
RD

1
.5
GNNI

From
Engine



2
.5
GNNI
Control
Module



15
2
.5
GNNI

Ground
(below
center
console)

Fig
.
10
.
Fuel
pump
electrical
circuit
.

30

-~
Relay
Fuel
Pump

8~T

I



1

s
ám
61
Front
Power
I



a
1
Distribution
Box
I_
16

WIRING
COLOR
CODE

BK
-
BLACK
BR
-
BROWN
Fuel
Pump



RD



-



RED
(in-tank)
M
YL
YELLOWGN
-
GREENBU
-
BLUE
1
VI
-
VIOLET
GY
-
GREY
WT
-
WHITE
PK
-
PINK

0011946

4
.
If
voltage
and
groundare
present,
fuel
pump
is
proba-
bly
faulty
.
If
there
is
no
voltage,
check
wiring
From
fuel
pump
Reay
and
make
sure
Reay
is
functioning
correctly
.

CAUTION-

Fuseandrelaylocationsmayvary
.
Usecara
when



Fuel
pump
power
consumption,
testing

troubleshooting
the
electrical
system
at
the
fuselrelay
panel
.
To
resolve
problems
in
identify-



NOTE-
ing
a
relay,
see
en
authorízed
BMW
dealer
.



"
To
achieveaccurate
testresults,
fhe
battery
voltage
at
the
connector
should
be
approximately
13
volts
.
1.
Remove
rearseat
cushion,
pull
right
side
insulation
mat



Charge
the
battery
asnecessary
.

back
to
expose
fuel
tank
accesscover
.
Remove
cover



.
q
higher
than
normal
power
consumption
usually
fin-
to
expose
wiring
connections
.



dicates
a
worn
fuel
pump,
which
may
cause
intermit-
tentfuel
starvation
due
lo
pump
overheating
and
2
.
Remove
fuel
pump
relay
and
opérate
fuel
pump
as
de-



seizure
.
The
only
remedy
is
pump
replacement
.
Be
scribed
under
Operating
fuel
pump
for
tests
earlier
.



sure
to
check
that
thereturn
fine
and
the
pump
pickup
Pump
should
run
.
Disconnect
jumper
wire
when
fin-



are
not
obstructed
before
replacing
the
pump
.

ished
.
1
.
Remove
rear
seat
cushion,
pull
right
side
insulation
mal
back
to
expose
fuel
tank
accesscover
.
Remove
cover
to
expose
wiring
connections
.

2
.
Disconnect
(black)
harness
connector
from
fuel
pump
.

3
.
Connect
an
ammeter
and
an
insulated
jumper
wire
be-

tween
terminals
in
connector
and
corresponding
pump

terminals
.
See
Fig
.
12
.

FUEL
PUMP

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

Table
a
.
E36
Component
Locations

Component



Model
Year



Location



Refer
to

Anti-theft
Control
Module



1992-1998



Behind
glove
compartment



Fig
.
8
.
Fig
.
9
.

Anti-theft
Horn



1
1992-1998



1
Right
rear
engine
compartment

Anti-slip
(Traction)
Control
Module



1994-1998



Power
distribution
box



Fig
.
8
.
(AST/ASC+T)



Fig
.
9
.

Anti-slip
(Traction)
Control
Switch



1994-1998



In
center
console

Automatic
Climate
(A/C)
Control



1992-1998



Behind
center
console
Module

AutomaticTransmission
Range



1992-1998



~
Next
to
gear
shift
lever
in
center
console



Fig
.
29
.
Switch
(Gear
Position/Neutral
Safety
Switch)

Auxiliary
Cooling
Fan
Dual
Switch



1992-1998



Right
side
radiator



1



Fig
.
18
.

Auxiliary
Cooling
Fan
Motor



1992-1998



Behind
front
grill

Auxiliary
Fuse
Box
(Left
Splice



1992-1998



I
Behind
left
front
footwell
kick-panel
Panel)

Auxiliary
RelayPanel



1
1992-1998



1
Left
side
of
dash
under
steering
column

Auxiliary
Fuse
Box
In
Trunk



1



1997-1998



1
Right
sideof
trunk
behind
trim
panel

AuADSry
ThrottlePosition
Motor



11994-1998



Front
of
engine
compartment

B+
Jump
Start
Junction
Point



1992-1998



Right
rear
of
engine
compartment



Fig
.
7
.

Back-Up
Light
Switch
(Manual)



1992-1998



Right
or
left
side
top
of
transmission



Fig
.
30
.

Body
Electronics
Control
Module



1994-1998



Behindglove
compartment



Fig
.
8
.
(ZKE
IV)



Fig
.
9
.

Brake
Fluid
Level
Sensor



1992-1998



Top
of
brake
fluid
reservoir
at
master
cylinder



Fig
.
15
.

Brake
Light
Switch



1
1992-1998



1
On
brake
pedal
supportbracket

Brake
Pad
Sensor,
Left
Front



1
1992-1998



1
Left
front
brake
caliper

Brake
Pad
Sensor,
Right
Rear



1992-1998



Right
rear
brake
caliper

Camshaft
Actuator
(VANOS)



1993-1998



Front
of
cylinder
head
Camshaft
Position
Sensor
(Cylinder



1992-1998



Front
of
engine
Identification)

Carbon
Canister
Valve
(TLEV)



1
1997-1998



1
In
sparewheel
well
in
trunk

ELECTRICAL
COMPONENT
LOCATIONS



610-11

Fig
.
5
.

Fig
.
4
.

Fig
.
24
.

Fig
.
7
.

Central
Locking
Module
(ZVM)



11992-1993



1
Behindglove
compartment



I



Fig
.
8
.
Fig
.
9
.

Check
Control
Module
(if
applicable)
1
1992
-
1998



1
Below
left
side
of
dash

Child
Protection
Window
Control



1992-1998



Center
console
(console)

Chime
Module



1992-1998



Below
left
side
of
dash
inleft
dash
trim
panel

Clock
(Multi-Function)



1993-1998



Center
console

Clutch
Pedal
Switch



1992-1998



On
clutch
pedal
support
bracket

Continued

COMPONENT
LOCATIONS

ELE--2
ELECTRICAL
WIRING
DIAGRAMS

FUSE
LINK

64766

I-i



I
-
i



a
1



I
_
ZJ
I



I



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4



2
GRN/VIO
I_I



!
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I_I



1
D>



6
END
INECONTROL



ENGINECONTROL



TRANSMISSION
CONTROL



DATALINK
MODULE



MODULE
RELAY



MODULE
(EGS)



CONNECTOR



I



I
I



I

5

(F18



--_______________________________________________



O19~
N
RIBUON
BOX
I
FUSE



II
15A
o~___________________________________________________Q~____-aft

TO
FUSE
F5



C



RED
(DIAGRAM
6
OF
7)

FUELPUMP



I



(DIAGRAM60F7)



C'



RED



\



L------r>
(DIAGRAM60F7)

I
LOW



F



I
FRONT



HIGH
BEAM



FOGJ
BEAM
I



I
LIGHT



I



I
LIGHT



I
j
/



I
LIGHT
RELAY



I



RELAY



li



SJ
RELAY

1992

1993W/TRUNK
MOUNTEDBATTERV

1993W/ENGINE
COMPARTMENTMOUNTEDBATTERV

1993W/TRUNK



1993W/ENGINE



1992



1992



WI
ENGINE



W/TRUNK

BATTERY



MOUNTEDBATTERV



¢)



MOUNTED
BATTERY



MOUN
O
TEDBATT
I
ERV



¢I¢I



MOUNTEDBATTERV

TOFUSEF40
<
,.k
RED
(DIAGRAM
6
OF
7)



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(DIAGRAM
3
OF
7)
TO
FUSEF3



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(DIAGRAMfiOF7)



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.
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(DIAGRAM
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RED
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POINT
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Power
Distribution

1992-93
318i
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(1
of
7)

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POINT

TOFUSEF15



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FUSE
F29
(DIAGRAM60F7)
(OIAGRAM6OF7)

I
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.
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GENERATOR



STARTER
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,(



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TO
IGNITION
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TOFUSE
F20

TOFUSEF19
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(DIAGRAM6OF7)



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-
(DIAGRAM70F7)

OXVGENSENSOR
RELAY
(4CVL)

RED
RED

RED

ON-BOARD
LEFTPOWERRIGHTPOWERLEFTPOWER
TOFUSEF17



COMPUTERHORN



WINDOWMODULE



WINDOWMODULE



WINDOW
MODULE
(DIAGRAM
60F
7)



RELAY

TO
COMFORTRELAV

ELE

Power
E

1994-95
Exc

JMPSTART



B+JUMP
START
C710NPOINT



RED
JUNC710NPOIN7
RED

REO

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

FUSIBLE



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LINK
m



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GENERATOR
STARTER
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W/TRUNK



W/ENGINE



W/TRUNK



RED
+
.
-
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MOUNTED



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RED
BATTERY



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81



w
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MODULERELAY
1994



POINT
ERATOR



x1995



BATTERY
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+
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o



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PUMP/
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w



w



START
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mm



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~
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318ti
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