1995 BMW 323i connector
[x] Cancel search: connectorPage 177 of 759
Table
i
.
ECM
Pin
Assignment-Bosch
DME
M3
.1
Pin
Signal
Component/function
2
ignal
FUEL
INJECTION
130-
3
1
45
vacant
-
46
vacant
-
-
47
vacant
-
-
48
output
A/C
compressor
control
A/C
compressor
disabled
via
compressor
control
relay
49
vacant
-
-
50
output
Ignition
control
(terminal
1),cyl
.
n
o
.
4
Primary
signal,
ignition
coil
cyl
.
n
o
.
4
51
output
Ignition
control
(terminal
1),cyl
.
n
o
.
6
Primary
signal,
ignition
coil
cyl
.
no
.
6
52
output
Ignition
control
(terminal
1),cyl
.
n
o
.
5
Primary
signal,
ignitioncoil
cyl
.
no
.
5
53
vacant
-
54
input
Power
supply
Battery
voltage
(+)
from
main
relay
terminal
87
55
ground
Ground
Ground
for
ignition
control
56
input
Power
supply
(terminal
15)
Batteryvoltage
(+)
with
key
on
or
engine
running
57
vacant
-
-
58
vacant
-
-
59
output
Throttleposition
sensor
Throttleposition
sensorsupply
voltage
(5
VDC)
60
input
Data
link
connector
Programming
voltage
61
vacant
-
-
62
vacant
-
-
63
vacant
-
-
64
input
Ignition
timing
intervention
from
A/T
control
module
(only
active
during
gearshift)
65
input
Automatic
transmission
(A/T)
range
switch
Transmission
park
or
neutral
signal
66
vacant
-
-
67
input
Engine
speed/crankshaft
position
sensor
Crankshaft
position/rpm
(voltage
(VAC)
between
pins
67
and
68)
68
input
Engine
speed/crankshaft
position
sensor
Crankshaft
position/rpm
(voltage
(VAC)
between
pins
67
and
68)
69
vacant
-
-
70
input
Oxygen
sensor
Oxygen
sensor
signal
(0-1
VDC
fluctuating
with
engine
running)
71
ground
Oxygen
sensor
Oxygen
sensor
signal
ground
72
vacant
-
-
73
input
Road
speed
Road
speed
signal
from
instrument
cluster
74
output
Engine
speed
(TD)
Engine
speed
(TD)
signalto
instrument
cluster
75
vacant
-
-
76
vacant
-
-
77
input
Intakeair
temperature
(IAT)
sensor
Intake
air
temperature
(0-5
V,
temperaturedependent)
78
input
Engine
coolant
temperature
(ECT)
sensor
Engine
coolant
temperature
(0-5V,
temperature
dependent)
79
vacant
-
-
80
vacant
-
-
81
input
On-boardcomputer
Drive-away
protection
enable
82
vacant
-
-
83
vacant
-
-
84
vacant
-
-
85
input
A/C
pressure
switch
From
Integrated
climate
control
module
via
A/C
pressure
switch
86
input
A/C
compressor
on
From
Integrated
climate
control
module
87
input
Diagnostic
connector
(RxD)
Diagnostic
RxD
(receive)signal
to
pin
15
in
Data
link
connector
88
input/output
Diagnostic
connector
(TxD)
Diagnostic
TxD
(transmit)
signal
to
pin
20
in
Data
link
connector
ECM
PIN
ASSIGNMENTS
Page 179 of 759
Table
j.
ECM
Pin
Assignment-Bosch
DME
M3
.3
.1
Pin
~
Signal
1
Componentffunction
1
signal
FUEL
INJECTION
130-
33
45
ground
Ignition
circuit
shield
Ground
shieldfor
ignition
circuit
monitoring
46
output
Fuel
consumption
(KVA
signal)
To
instrument
cluster
47
output
Crankshaft
rpm
Engine
speed
(TD)
signal
to
instrument
cluster
48
output
A/C
compressor
control
A/C
compressor
relay
terminal
85
49
vacant
-
-
50
output
Ignition
coil
control,
cyl
.
1
Primary
signal,
ignition
coil
1
51
output
Ignition
coil
control,
cyl
.
2
Primary
signal,
ignition
coil
2
52
output
Ignition
coil
control,
cyl
.
3
Primary
signal,
ignition
coil
3
53
vacant
-
-
54
input
Power
supply
Battery
voltagefrom
main
relay
(terminal
87a)
55
ground
Ground
Ground
for
ignition
control
56
input
Power
supply
(terminal15)
Batteryvoltage
with
key
on
or
engine
running
57
input
Ignition
timing
intervention
From
A/T
control
module
58
vacant
-
-
59
output
Throttleposition
sensor
(TPS)
Voltage
supply
to
TPS
(5
VDC)
60
input
Programming
voltage
Data
link
connector
61
vacant
-
-
62
vacant
-
-
63
vacant
-
-
64
input
A/C
on
signal
From
integrated
climate
control
module
65
input
A/C
pressure
signal
From
integrated
climate
control
module
via
A/C
pressure
switch
66
input
On-board
computer
Drive-away
protection
enable
(starter
immobilization
relay)
67
vacant
-
-
68
vacant
-
-
69
input
Knock
sensor
#2
(cyl
.
4,5,
6)
Knock
sensor
#2
signal
70
input
Knock
sensor
#1
(cyl
.
1,2,
3)
Knock
sensor
#1
signal
71
ground
Ground
Ground
for
knock
sensors
and
shields
72
vacant
-
-
73
input
Throttleposition
sensor
(TPS)
Throttleposition
signal
74
vacant
-
75
vacant
-
-
76
vacant
-
77
input
Intakeair
temperatura
Intakeair
temperatura
sensor
(0-5
VDC)
78
input
Engine
coolant
temperature
Engine
coolant
temperature
sensor
(0-5
VDC)
79
vacant
-
80
vacant
-
-
81
input
Automatic
transmission
gear
positionlneutral
A/T
parkor
neutral
position
signal
safetyswitch
82
vacant
-
-
83
vacant
-
-
84
vacant
-
-
85
vacant
-
-
86
vacant
-
-
87
input
Diagnostic
connector
(RxD)
Diagnostic
RxD
(receive)
signal
to
pin
15
in
Data
link
connector
88
input/output
Diagnostic
connector
(TxD)
Diagnostic
TxD
(transmit)
signal
to
pin
20
in
Data
link
connector
ECM
PIN
ASSIGNMENTS
Page 181 of 759
Table
k
.
ECM
Pin
Assignment-Bosch
DME
M5
.2
(continued)
Pin
I
Signal
1
Componentltunction
1
Signal
45
I
output
I
Mass
air
flow
meter
I
Intake
airSignal
46
output
Oxygen
sensor
(monitoring
sensor)
Oxygen
sensor
control
47
not
used
-
48
not
used
-
49
output
Ignition
coil
control,
cyl
.
1
Primary
signal,
ignition
coil
1
50
output
Ignition
coil
control,
cyl
.
2
Primary
signal,
ignition
coil
2
51
not
used
-
52
not
used
-
53
input
Throttleposition
sensor
Throttleposition
Signal
54
input
Power
supply
Batteryvoltage
from
main
relay
(terminal
87)
55
ground
Ground
Ground
for
ECM
56
input
Power
supply
(terminal
15)
Battery
voltage
with
key
on
or
engine
running
57
output
Activate
cooling
fan
(man
.
trans
.)
control
Normal
speed
relay
58
not
used
-
-
59
not
used
-
-
60
input
Programming
voltage
Programming
voltage
via
data
link
connector,
pin
18
61
output
Evaporative
emissionvalve
Evaporative
emission
valve
control
62
vacant
-
-
63
output
Fuel
pump
relay
Fuel
pump
relay
control
64
not
used
-
65
not
used
-
-
66
not
used
-
-
67
not
used
-
-
68
input
Signal
above
80°C(man
.
tran
.)
Double
temperature
switch
69
input
Automatic
climate
control
Automatíc
climate
control
70
input
Knock
sensor
#1
(cyl
.
1,2)
Knock
sensor
#1
Signal
71
ground
Ground
Ground
for
analog
signals
and
knock
sensors
72
not
used
-
-
73
not
used
-
-
74
input
Engine
coolant
temperature
sensor
Engine
coolant
temperatura
Signal
75
not
used
-
-
76
not
used
-
-
77
output
Oxygen
sensor
(regulating
sensor)
Oxygen
sensor
control
78
input
Crankshaft/rpm
sensor
Crankshaft
position/rpmSignal
79
input
ABS
or
traction
control
ABS
or
AST
control
80
input
Engine
speed
Engine
speed
Signal
81
not
used
-
-
82
not
used
-
-
FUEL
INJECTION
130-
3
5
83
input
On-board
computar
From
On-boardcomputer
(terminal
4)
84
not
used
-
-
85
not
used
-
-
86
not
used
-
-
87
input
Diagnostic
connector
(RxD)
Diagnostic
RxD
(receive)signal
to
pin
15
in
Data
link
connector
88
output
I
Diagnostic
connector
(TxD)
Diagnostic
TxD
(transmit)
signal
to
pin
17in
Data
link
connector
ECM
PIN
ASSIGNMENTS
Page 183 of 759
Table
I
.
ECM
Pin
Assignment-Siemens
DME
MS
41
.1
(continued)
Pin
I
Signal
I
Component/function
1
Signal
FUEL
INJECTION
130-
37
47
-
48
input
Crankshaft
position
sensor
(Hall
effect)
Crankshaft
position
sensor
control
49
input
Power
supply
(terminal
15)
Batteryvoltage
with
key
onor
engine
running
50
output
Solenoid
valve
(running
losses)
Running
losses
51
output
Carbon
canister
valve
Carbon
canister
valve
control
52vacant
-
53
output
Idle
speed
control
valve
Pulsed
ground-close
signal
(seealsopin29)
54
input
Power
supply
Battery
voltagefrom
main
relay
(terminal
87)
55
vacant
-
56
-
57
input
Knock
sensor
(cyl
.
1-3)
Knock
sensor
input
Signal
58
output
Knock
sensor
(cyl
.
1-3)
Knock
sensor
control
59
input
Knock
sensor
(cyl
.
4-6)
Knock
sensor
input
Signal
60
input/output
Diagnostic
connector
(TxD)
Diagnostic
TxD
(transmit)
signal
to
pin
18
in
Data
link
connector
61
output
Oxygen
sensor
heater
(monitoring
sensor)
Oxygen
sensor
heater
ground
62
output
Secondary
air
injection
Secondary
air
injection
control
valve
63
output
Knock
sensor
(cyl
.
4-6)
Knock
sensor
control
64
input
Camshaft
position/rpm
sensor
Camshaft
position/rpm
sensor
control
65
input
Camshaft
position/rpm
sensor
Camshaft
position/rpm
sensor
control
66
-
67
output
Oxygen
sensor
Oxygen
sensor
reference
voltage
68
output
Evaporative
purge
valve
control
Pulsed
ground
with
engine
at
normal
temperature
and
varyingengine
load
69
output
Fuel
pump
relay
control
Fuel
pump
relay
switches
with
engine
runningorcranking
(crankshaft
position
signal
must
be
present
for
relay
switchover)
70
vacant
-
-
71
output
Oxygen
sensor
heater
(regulating
sensor)
Oxygen
sensor
heater
ground
72
output
Oxygen
sensor
(monitoring
sensor)
Oxygen
sensor
referencevoltage
73
input
Main
relay
control
Main
relay
activation
(terminal
85)
74
output
A/C
compressor
control
A/C
compressor
relay
control
75
input
Oxygen
sensor
Oxygen
sensor
signal
76
not
used
-
-
77
input
Oxygen
sensor
(regulating
sensor)
Oxygen
sensor
signal
78
input
Oxygen
sensor
(monitoring
sensor)
Oxygen
sensor
signal
79
output
Oxygen
sensor
(regulating
sensor)
Oxygen
sensor
referencevoltage
80
Traction
control
AST
module
81
Traction
control
AST
module
82
Traction
control
AST
module
83
output
Crankshaft
position
sensor
(Hall
effect)
Crankshaft
position
sensor
control
84
vacant
-
-
85
output
Automatic
transmission
Automatic
transmission
control
module
86
input
Automatic
transmission
Automatic
transmissíon
control
module
87
input
Power
supply
Battery
voltage
from
main
relay
(terminal
87)
88
input/output
Diagnostic
connector
(TxD)
Diagnostic
TxD
(transmit)
signal
to
pin
17
in
Data
link
connector
ECM
PIN
ASSIGNMENTS
Page 187 of 759
2
.
Remove
fuel
tank
filler
cap
.
3
.
Remove
rearseat
cushion
and
pull
back
insulation
mats
to
expose
fuel
tank
access
covers
.
See
Fig
.
2
.
uui3140
Fig
.
2
.
Right
side
fuel
tank
access
cover
under
rear
seat
cushion
.
4
.
Remove
right
and
left
access
covers
to
expose
fuel
hoses
and
electrical
connections
at
tank
.
5
.
Label
fuel
hoses
.
Then
disconnect
hoses
and
harness
connectors
from
fuel
sending
units
and
fuel
pump
.
See
Fig
.
3
.
FUELTANK
AND
FUEL
PUMP
160-
3
NOTE-
"
If
necessary,
push
fuel
level
sender
arm
toward
fuel
pump
assembly
to
facilitate
removal
.
"
BMW
special
tool
no
.
16
1
020
should
beused
tore-
move
and
install
the
threaded
collar
.
Damage
to
thecollar
may
result
if
the
special
tool
is
not
used
.
"
Pump
out
contents
of
each
tanklobe
using
approved
pumpinglextraction
equipment
and
flexible
fuel-grade
hose
.
WARNING
-
Fuel
may
be
spilled
.
Do
not
smoke
or
work
near
heaters
or
other
fire
hazards
.
7
.
Installation
of
sending
units
is
reverse
of
removal,
not-
ing
the
following
:
"
Use
new
sealing
rings
when
installing
pump/sending
unit
assemblies
.
"
Be
sure
that
fuel
line
connections
point
in
same
direc-tion
as
they
carne
out
.
"
Fill
tank
and
check
for
leaks
by
running
engine
.
CA
UTION-
Before
starting
the
engine,
fill
the
fuel
tank
with
at
least
1.5
gallons
(5liters)
of
fuel
.
The
pump
will
be
damaged
if
you
run
it
without
fuel
.
Fuel
tank,
removing
and
installing
1.
Disconnect
negative
(-)cablefrom
battery
:
CAUTION-
Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
onpage
viii
.
2
.
Remove
fuel
tank
filler
capand
drain
tank
as
described
earlier
.
3
.
Working
in
left
access
tank
access
hole
(under
rear
seat
cushion),
remove
vent
pipe
fromtank
.
4
.
Working
inside
car,
disconnectparking
brake
cable
ends
from
parking
brake
lever
.
See
340
Brakes
.
5
.
Working
underneath
car,
gently
pry
fuel
lines
away
from
retaining
bracket
in
front
of
tank
.
Remove
clamps
and
disconnect
fuel
hoses
as
shown
in
Fig
.
4
.
6
.
Remove
exhaust
system
and
heat
shield
as
described
ooisiai
in
180
Exhaust
System
.
See
Fig
.
5
.
Fig
.
3
.
Fuel
pump/fuel
level
sender
assembly
in
top
offuel
tank
(right
side
shown)
.
Disconnect
supply
hose
(A),
return
hose
(B)
and
7
.
Remove
driveshaft
.
See
260
Driveshaft
.
harness
connector
(C)
.
8
.
Pull
parking
brake
cables
backward
away
from
bottom
of
6
.
Unscrew
threaded
collars
from
fuel
tank
.
Slowly
with-
fuel
tank,
disengaging
them
from
brackets
as
needed
.
draw
fuel
sender
assemblies
from
tank,allowing
fuel
to
drain
off
.
FUEL
TANKAND
LINES
Page 188 of 759
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
.
Page 189 of 759
Fuel
leve¡
senders,
testing
Fuel
leve¡
sender
(right
side)
The
left
and
right
fuelleve¡
sending
units
are
wired
in
series
.
and
fuel
pump,
removing
and
installing
The
fuel
gauge
receives
a
signal
that
is
the
average
of
the
two
1
.
Disconnect
negative
(-)
cable
from
battery
.
input
values
.
1
.
Remove
rear
seat
cushion,
lift
up
insulation
mats,
andremove
both
fuel
tank
access
covers
.
2
.
Disconnect
white
plug
on
each
sending
unit
.
See
Fig
.
6
.
3
.
Check
resistance
value
of
eachsending
unit
.
Values
should
be
the
same
.
5
.
If
valuesare
different,
remove
sending
units
as
described
below,
and
check
resistance
valuésacross
terminals
.
Table
a
lists
resistance
values
for
senders
at
various
float
positions
.
Table
a
.
Fuel
Leve¡
Sender
Resistances
Float
position
Test
result
(ohms)
Right
side
empty
10
ohm
t2
Right
side
full
250
ohm
±
5
Left
side
empty
10
ohm
t
2
Left
side
fui¡
250
ohm
±
5
FUEL
TANK
AND
FUEL
PUMP
160-
5
CAUTION
-
Prior
to
disconnecting
the
battery,
read
the
battery
disconnection
cautionsglven
at
the
front
of
this
manual
onpage
viii
.
2
.
Drain
fuel
from
tank
as
described
earlier
.
WARNING
-
Always
unscrew
the
fuel
tank
cap
to
release
pres-
sure
in
the
tank
before
working
on
the
tank
or
fines
.
3
.
Remove
rear
seat
cushion
and
pull
back
insulation
pad
under
right
side
.
4
.
Remove
screws
holding
rightfuel
tank
accesscover
.
Remove
cover
.
5
.
Label
fuel
hoses
.
Disconnect
hoses
and
harness
con-
nectors
from
fuel
sending
unit
and
fuel
pump
.
6
.
Unscrew
threaded
collar
from
fuel
pumplfuel
leve¡
sender
.
Slowly
withdraw
assembly
from
tank,allowing
fuelto
drain
off
.
See
Fig
.
7
.
0013187
&
0013194
Fig
.
6
.
Fuel
pump/leve¡
sender
terminal
identification
.
Check
resis-
tance
at
terminals
of
white
connectors
(arrows)
.
"
If
necessary,
push
leve¡
sender
arm
toward
fuel
pump
assembly
to
facilitate
removal
.
NOTE
-
BMW
special
tool
no
.
16
1
020
should
beused
to
re-
move
and
install
the
threaded
collar
.
Damage
to
the
collar
may
result
if
the
special
tool
is
not
used
WARNING
-
NOTE-
Fuel
may
be
spilled
.
Do
not
smoke
or
work
near
The
compensating
siphon
pump
(Fig
.
1)
maintains
the
heaters
or
other
fire
hazards
.
fuel
leve¡
between
the
right
and
left
tank
lobes
.
If
the
re-
sistances
are
different
between
the
left
and
right
send-
ers,
remove
the
senders
and
visually
inspect
the
leve)
in
7
.
Using
a
new
sealing
ring,
install
pump
and
sending
each
lobe
.
If
the
leve¡
is
different,
check
the
siphon
com-
unit,
being
sure
that
fuel
line
connections
point
in
same
pensating
pump
.
direction
as
they
carne
out
.
8
.
Reconnect
harnessconnector
and
hoses
.
Fill
tank
and
check
for
leaks
by
running
engine
.
Insta¡¡
access
cover
and
its
mountingscrews
.
Reconnect
negative
(-)
cable
to
battery
.
CAUTION
-
Before
starting
the
engine,
fill
the
fuel
tank
with
at
least
1
.5
gallons
(5liters)
of
fuel
.
The
pump
will
be
damaged
if
you
run
it
without
fuel
.
FUEL
LEVEL
SENDERS
Page 191 of 759
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