1993 BMW M3 throttle

130-
34



FUEL
INJECTION

Pin



i
Signal



1
Component/function



1
Signal

1



output



Oxygen
sensor
(monitoring
sensor)heater



Oxygen
sensor
heater
control
(switched
ground)

2



output



Idle
speed
control
valve



Pulsed
ground-close
signal
(see
also
pin
29)

3



output



Fuel
injector
control,
cyl
.
1



Pulsed
ground
(injection
pulsewidth
in
ms)
cyl
.
1

4



output



Fuel
injector
control,
cyl
.
4



Pulsed
ground
(injection
pulse
width
in
ms)
cyl
.
4

5



not
used



-



-

6



ground



Ground



Ground
for
fuel
injector
output
stage

7



not
used



-

8



1
output



1
Check
Engine



1
Instrument
cluster,
Check
Engine
lamp

9



not
used



-



-

10



input



Electronic
immobilizer
control
(EWS
II)



Electronic
immobilizer
control
(EWS
II)
module

11



output



Automatic
climate
control



Automatic
climate
control,
to
evaporator
controlier

12



not
used



-



-

13



not
used



-



-

14



not
used



-



-

15



not
used



-



-

16



input



Intake
air
temperature



Intake
air
temperature
Signal

17



input



Mass
air
flow
meter



Intake
air
signal

18



not
used



-



-

19



input



Oxygen
sensor
(monitoring
sensor)



Oxygen
sensor
control

20



output



Crankshaft/rpm
sensor



Crankshaft/rpm
sensor
control

21



input



Camshaft
position
sensor



Camshaft
position
signal

22



output



Ignition
coil
control,
cyl
.
3



Primary
signal,
ignitioncoil
3

23



output



Ignition
coil
control,
cyl
.
4



Primary
signal,
ignitioncoil
4

24



not
used



-



-

25



not
used



-



-

26



input



Power
supply
(terminal
30)



Battery
voltage
(B+)
at
al¡
times

27



input



Main
relay
control



Main
relay
activation
(terminal
85)

28



ground



Ground



Ground
for
ECM
and
sensor
shielding

29



output



Idle
speed
control
valve



Pulsed
ground-open
signal
(seealsopin
2)

30



output



Oxygen
sensor
(monitoring
sensor)
heater



Oxygen
sensor
heater
control
(switched
ground)

31



output



Fuel
injectorcontrol,
cyl
.
3



Pulsed
ground
(injection
pulsewidth
in
ms)
cyl
.
3

32



output



Fuel
injector
control,
cyl
.
2



Pulsed
ground
(injection
pulsewidth
in
ms)
cyl
.
2

33



I
not
used

40



input



Knock
sensor
#2
(cyl
.
3,4)



Knock
sensor
#2
signal

41



not
used



-



-

42



input



Vehicle
speed



Vehicle
speed
signal
from
instrument
cluster

43



not
used



-



-

44



output



Throttleposition
sensor
(TPS)



Throttleposition
reference
signal

ECM
PIN
ASSIGNMENTS

Table
k
.
ECM
Pin
Assignment-Bosch
DME
M5
.2

34



ground



Ground



Ground
for
ECM/
output
stages

35



not
used



-



-

36



input



A/C
compressor
relay



A/C
compressor
relay
control

37



not
used



-



-

38



not
used



-



-

39



not
used



-



-

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

130-
3
6



FUEL
INJECTION

Pin



1
Signal



1
Componentffunction



1
Signal

1



output



Ignition
coil
control,
cyl
.
2



Primary
signal,
ignition
coil
2

2



output



Ignition
coil
control,
cyl
.
4



Primary
signal,
ignitioncoil
4

3



output



Ignition
coil
control,
cyl
.
6



Primary
signal,
ignition
coil
6
4
ground
Ground



Ground

5



output



Fuel
injectorcontrol,
cyl
.
2



Pulsed
ground
(injection
pulse
width
in
ms)
cyl
.
2
6



output



Fuel
injectorcontrol,
cyl
.
1



Pulsed
ground
(injection
pulse
width
in
ms)
cyl
.
1

7



output



Mass
air
flow
meter



Mass
air
meter
signal

8



input



Mass
air
flow
meter



Mass
air
meter
signal

9



output



Instrument
cluster



Fuel
consumption
signal

10



output



Engine
coolant
temperature
(ECT)
sensor



ECT
signal

11



output



Fueltankpressure
sensor



Fueltankpressure
sensor
control

12



input



Throttleposition
sensor
(TPS)



Throttleposition
signal

13
-

14



input



Intake
air
temperature
(IAT)
sensor



Intake
air
temperature
signal

15



Traction
control



AST
module

16



input



Automatic
climate
control



Automatic
climate
control

17

18



input



Electronic
immobilizer
control
(EWS
II)



Electronic
immobilizer
control
(EWS
II)
module

19



Automatic
climate
control



Automatic
climate
control

20



-



Instrument
cluster



Instrument
cluster

21



output



Camshaft
actuator
(VANOS
solenoid)
control



Camshaft
actuator
(VANOS
solenoid),
switched
ground

22



output



Fuel
injectorcontrol,
cyl
.
3



Pulsed
ground
(injection
pulse
width
in
ms)
cyl
.
3

23



Fuel
injectorcontrol,
cyl
.
6



Pulsed
ground
(injection
pulse
width
in
ms)
cyl
.
6

24



Fuel
injectorcontrol,
cyl
.
4



Pulsed
ground
(injection
pulse
width
in
ms)
cyl
.
4

25



output



Oxygen
sensor
heater
control



Oxygen
sensor
heater
ground

26



input



Power
supply
(terminal
30)



Battery
voltage(B+)
at
all
times

27



output



Idle
speed
control
valve



Pulsed
ground-open
signal
(see
also
pin
53)

28
ground
Ground



Ground
29



output



Ignition
coil
control,
cyl
.
1



Primary
signal,
ignition
coíl
1

30



output



Ignition
coil
control,
cyl
.
3



Primary
signal,
ignition
coil
3

31



output



Ignition
coil
control,
cyl
.
5



Primary
signal,
ignition
coil
5

32
ground
Ground



Ground
33



output



Fuel
injector
control,
cyl
.
5



Pulsedground
(injection
pulsewidth
in
ms)
cyl
.
5

34
ground
Ground



Ground
35



output



Secondary
air
injection



Secondary
air
injection
pump
relay
control

36



output



Engine
speed
output



Engine
speed
signal

37
-

38



ground



Knock
sensor



Shielding
for
knock
sensors

39



output



Intake
air
temperature
sensor
(IAT
Sensor)



Voltagesupply
to
IAT
sensor
and
ECT
sensorEngine
coolant
temperature
(ECT)
sensor

40



output



Crankshaft
position
sensor
(Hall
effect)



Crankshaft
position
sensor
control

41



ground



Camshaft
position
(CMP)
sensor



Shielding
for
CMP
sensor

42



output



Throttle
position
sensor
(TPS)



TPS
ground

43



input



Camshaft
position/rpm
sensor



Camshaft
position/rpm
sensor
control

44



output



Throttle
position
sensor
(TPS)



Voltagesupply
to
TPS
(5
VDC)

45



Traction
control



AST
module
46



-



Instrument
cluster



Instrument
cluster

ECM
PIN
ASSIGNMENTS

Table
I.
ECM
Pin
Assignment-Siemens
DME
MS
41
.1

230-
6



MANUAL
TRANSMISSION

Transmission,
removing
and
installing

1
.
Disconnect
negative
(-)
cable
from
battery
.

CAUTION-

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

2
.
Insta¡¡
enginesupportacrossengine
bay
.
Raise
engine

so
that
weight
of
engine
ís
supported
.
See
Fig
.
10
.

Fig
.
10
.
Engine
support
equipment
used
to
support
engine
from
above
before
removing
transmission
.

3
.
Raise
vehicle
to
gain
access
to
underside
of
car
.

4
.
Support
transmission
with
transmission
jack
.
lf
applica-
ble,
remove
reinforcing
cross
brace
from
belowen-
gine/transmission
.

5
.
Disconnect
harnesscon
nector
from
reverse
light
switch
on
transmission
.

6
.
Remove
completeexhaustsystem
and
heat
shield
.
See
180
Exhaust
System
.

NOTE-

Disconnect
oxygensensor
hamess
connector(s)be-
fore
lowering
exhaust
system
.

7
.
Remove
driveshaft
.
See260
Driveshaft
.

8
.
Disconnect
shift
rod
from
transmission
selectorshaft
.
See
Fig
.
11
.

9
.
Disconnect
shift
console
fromtop
of
transmission
.
See
250
Gearshift
Linkage
.

TRANSMISSION
REMOVAL
AND
INSTALLATION

Washers

Shift



Shift
rod

rod



retaining
clip

0
0
,

Fig
.
11
.
Shift
lever
to
transmission
connection
.

Shift
console

0012024

10
.
Unbolt
clutch
slave
cylinder
from
sideof
transmission
.

Do
not
disconnect
fluid
hose
.
Suspend
slavecylinder

from
chassis
using
stiff
wire
.

CAUTION-

Do
not
operate
clutch
pedal
with
slave
cylinder
re-
moved
from
transmission
.

11
.
Support
transmission
from
below
with
jack
.
Remove
rear

support
crossmember
from
transmission
.
See
Fig
.
12
.

Fig
.
12
.
Rear
transmission
crossmember
(arrow)
.

12
.
Lower
transmission/engine
assembly
until
it
rests
on
front
suspension
crossmember
.

CAUTION-

Tilting
the
engine
to
lower
thetransmission
can
lead
to
damage
to
various
componente
due
to
lackof
clearance
at
rear
of
engine
-On
cars
with
AST
remove
throttle
body
before
tilt-
ing
engine
.
-Remove
brace
fluid
reservoir
if
necessary
.

0013135

240-
4



AUTOMATIC
TRANSMISSION

TRANSMISSION
REMOVALAND

INSTALLATION

Removal
and
installation
of
thetransmission
is
best
accom-

plished
on
a
lift
using
a
transmission
jack
.
Use
caution
and

safe
workshop
practices
when
working
beneath
car
and
low-

ering
transmission
.

WARNING
-

To
lift
the
vehicle
safely,
see010
Fundamentals
for
the
Do-it-Yourself
Owner
.

CAUTION-

"
Be
sure
the
vehicle
is
properly
supported
.
The
removal
of
the
transmission
may
upset
the
bal-
ance
of
the
vehicle
on
a
lift
.

"
Tilting
the
engine
to
remove
the
transmission
can
lead
to
damage
to
various
components
due
to

lack
of
clearance
.
-On
carswith
AST
remove
throttle
body
.
-Remove
brake
fluid
reservoir
if
necessary
.

Torx-head
bolts
are
used
to
mount
thetransmission
to
the

bellhousing
.
Be
sure
to
have
appropriate
tools
on
hand
before

starting
thejob
.

2
.
Install
engine
support
across
engine
bay
.
Raise
and

safely
support
vehicle
.
See
Fig
.
6
.

WARNING
-
"
When
raising
thecar
using
a
floor
jack
or
a
hy-
draulic
lift,
carefully
position
the
jack
pad
to
pre-
vent
damaging
the
car
body
.
A
suitable
liner
(wood,
rubber,
etc
.)
should
be
placed
between
the
jack
and
the
car
to
prevent
body
damage
.

"
Watch
the
jack
closely
.
Make
sure
it
stays
stable
and
does
not
shift
or
tilt
.
As
the
car
is
raised,
the
car
may
roll
slightty
and
the
jack
may
shift
.

CAUTION-

Removal
of
transmission
will
cause
engine
to
tip
unlessengine
support
is
used
.

TRANSMISSION
REMOVAL
AND
INSTALLATION

Fig
.
6
.
Engine
support
equipment
used
to
support
engine
from
above

before
removing
transmission
.

3
.
Raise
vehicle
to
gain
access
to
underside
of
car
.

4
.
Drain
ATF
from
transmission
as
described
earlier
.

5
.
Disconnect
oxygen
sensor
harness
.
Remove
exhaust

system,
and
exhaust
heat
shield
.
See
180
Exhaust

System
.

Transmission,
removing
and
installing



6
.
Remove
driveshaft
.
See
260
Driveshaft
.

1
.
Disconnect
negative
(-)
cable
from
battery
.



7
.
With
selector
lever
in
Park,
disconnect
shift
selector
le-

ver
cable
from
lever
and
remove
cable
bracket
.
Hold

CA
UTION-



linkage
clamping
bolt
stationary
when
loosening

Prior
to
disconnectiog
the
battery,
read
the
battery



clamping
nut
.
See
Fig
.
7
.

disconnection
cautions
given
at
the
front
of
this
manual
on
page
vi¡¡
.

Fig
.
7
.



Selector
lever
cable
clamping
nut
(A)
.
Loosen
cable
clamping
nut
(B)
and
remove
cable
from
bracket
.
Always
counterholdclamping
bolt
when
loosening
nut
.

250-2



GEARSHIFT
LINKAGE

5
.
Remove
driveshaft
.
See260
Driveshaft
.



9
.
Release
gearshift
lever
retaining
ring
from
below
by

turningspecial
tool
90°(
1
/4
turn)
counterclockwise
.
See

6
.
Support
transmission
with
transmission
jack
.
Remove



Fig
.
4
.

crossmember
from
rear
of
transmission
.
See
Fig
.
2
.

Fig
.
2
.



Rear
transmission
crossmember
(arrow)
.

7
.
Lower
rear
of
transmission
to
access
gearshift
linkage
.

CAUTION-

Tilting
the
engine
to
lower
thetransmission
can
lead
to
damage
to
various
componente
due
to
lackof
clearance
.
-On
cars
with
AST
remove
throttle
body
.
-Remove
brake
fluid
reservoir
if
necessary
.

0013135

8
.
Working
below
transmission,
disconnect
shift
rod
from

gearshift
lever
.
Note
washers
on
either
side
of
shift
rod

end
.
See
Fig
.
3
.

v

clip

Shift
rod

Fig
.
3
.



Pull
off
shift
rod
retaining
clip
in
direction
of
arrow
(t)
;
disen-
gage
shift
rod
from
gearshift
lever
(2)
.

MANUAL
TRANSMISSION
GEARSHIFT

BMW
Tool
No
.
25
1
110
orequivalent

Fig
.
4
.



Shift
lever
retaining
ring
being
removed
using
BMW
special

tool
25
1
110
.

10
.
Raise
transmission
and
temporarily
instan
transmission

crossmember
.

11
.
Lower
vehicle
.
Working
from
inside
passengercom-

partment,
pull
upon
gearshift
lever
to
remove
it
togeth-

erwith
retaining
ring
and
rubber
grommet
.

Gearshift
lever,
installing

(manual
transmission)

6532

1
.
Instan
shift
lever,
aligninglocking
tabs
with
openings
in

shift
console
.
Press
down
on
retaining
ring
until
it
clicks
into
place
.
See
Fig
.
5
.

\
Retaining

Fig
.
5
.



Shift
lever
retaining
ring
.
Fit
plastic
tabs
into
slots
of
shift
con-
sole(arrows)
.

260-2
DRIVESHAFT

Further
inspection
requires
removal
of
the
driveshaft
.

Check
the
front
centering
guide
on
the
transmission
output
flange
for
damage
or
misalignment
.
Also
check
runoutatthe

transmission
outputflange
and
output
shaft,
and
at
the
final

drive
input
flange
.
Check
the
bolt
hole
bores
in
theflange
for

wear
and
elongation
.

Driveshaftflange
runout
(max
.
allowable)

"
Transmission
outputflange

axial
play
...
.
..
...
..
.
.......
0
.10
mm
(0
.004
in
.)

radial
play
.......
...
.
.
.......
0
.07
mm
(0
.003
in
.)

"
Final
driveinput
flange
radial
play
(measured
at

driveshaft
centering
lip)
..
......
0
.07
mm
(0
.003
in
.)

Spinthe
center
bearing
and
check
for
the
smooth
operation

without
play
.
Check
that
thesplines
of
the
sliding
coupling

move
freely
.
Clean
and
lubricate
the
splines
with
molybdenum

disulfide
grease
(Molykote
®
Longterm
2
or
equivalent)
.

Check
the
universal
joints
for
wear
or
binding
.
If
any
joint
isdif-

ficult
to
move
or
binds,
the
driveshaft
section
should
be
replaced
.

Table
a
.
Driveshaft
Troubleshooting

NOTE-

With
the
driveshaft
installed,
theactual
amount
that
the
universal
joints
pivot
is
limited
.
For
the
most
accurate

test,
check
universal
joints
in
their
normal
range
of

movement
.

If
inspection
revealsnothing
wrong
with
the
driveshaft,
it

may
need
to
be
rebalanced
.
This
can
be
done
by
a
speciality

driveshaft
repair
shop
.
Also,
check
the
alignment
ofthe
drive-

shaft
as
described
below
.

NOTE-

Minor
driveshaftvibrations
can
often
be
correctedsim-

ply
by
disconnecting
the
driveshaftat
the
finaldrive,

and
repositíoning
the
driveshaft
90°,
180°
or270°
inre-
lationto
the
final
drive
input
flange
.

Table
a
lists
symptoms
of
driveshaft
problems
and
their

probable
causes
.
Most
of
the
repair
information
is
contained

within
this
repair
group
.

Symptom



Probable
cause



Corrective
action

1
.
Vibration
when



a
.
Incorrect
preload
of
center
bearing
.



a
.
Check
preload
of
center
bearing
.
Readjust
preload
.
See
Fig
.
6
.

starting
off
(forward



b
.
Center
bearing
rubber
deteriorated
.



b
.
Inspect
center
bearing
and
rubber
.
Replace
if
necessary
.
orreverse)
.



c
.



Flex-disc
damaged
or
worn
.



c
.



Inspect
flex-disc
.
Replace
if
necessary
.

TROUBLESHOOTING

d
.
Engine
or
transmission
mounts
faulty
.
I
d
.
Inspect
engine
and
transmission
mounts
.
Align
or
replace,
if
nec-

essary
.

e
.
Front
centering
guide
worn,
or



e
.
Check
front
centering
guide
and
replace
if
necessary
.
Check

driveshaft
mounting
flanges
out
of



runout
of
driveshaft
flanges
.

round
.

f
.



Universal
joints
worn
or
seized
.



f
.



Check
universal
joint
play
and
movement
.
Replace
driveshaft
if

necessary
.

g
.
Sliding
coupling
seized
.



g
.
Remove
driveshaft
and
check
movement
of
sliding
coupling
.

Clean
coupling
splines
and
replace
parts
asnecessary
.

h
.
Driveshaft
misaligned
.



h
.
Check
driveshaft
alignment
.

2
.
Noise
during
on/off



a
.
Finaldrive
components
worn
or



a
.
Remove
final
drive
and
repair
.

throttle
or
when



damaged
(excessive
pinion-to-ring-

engagíng
clutch
.



gear
clearance)
.

b
.



Drive
axleor
CV
joint
faulty
.



b
.



Inspect
drive
axles
and
CV
joints
.
Repair
or
replace
as
neces-
sary
.

c
.
Sliding
coupling
seized
.



c
.
Remove
driveshaft
and
check
movement
of
sliding
coupling
.

Clean
coupling
splines
and
replace
parts
as
necessary
.

3
.
Vibration
at
25
to
30



a
.
Front
centering
guideworn,
or



a
.
Check
front
centering
guide
and
replace
if
necessary
.
Check
mph
(40
to
50



driveshaft
mounting
flanges
out
of



runout
of
driveshaft
mounting
flanges
.
km/h
).



round
or
damaged
.

b
.
Universal
joints
worn
or
seized
.



b
.
Check
universal
joint
play
and
movement
.
Replace
driveshaft
if
necessary
.

c
.



Flex-disc
damaged
or
worn
.



c
.



Inspect
flex-disc
.
Replace
if
necessary
.

d
.
Center
bearing
rubber
deteriorated
.



d
.
Inspect
center
bearing
.
Replace
if
necessary
.

e
.
Sliding
coupling
seized
.



e
.
Remove
driveshaft
and
check
movement
of
sliding
coupling
.
Clean
coupling
splines
and
replace
parts
asnecessary
.

f
.



Misaligned
installed
position
.



f
.



Check
driveshaft
alignment
.

300-4



SUSPENSION,
STEERING
AND
BRAKES-GENERAL

Three-channel
ABS
ís
used
on
al[
E36
cars
equipped
with



Al¡
Season
Traction
(AST)
standard
ABS
.
Each
front
wheelhas
a
separate
solenoid

valve
to
modulate
hydraulic
pressure
to
that
brake
caliper
.



The
traction
control
system
works
in
conjunction
with
ABS
The
rear
wheels
are
modulated
asa
pair,
controlled
by
a
sin-



and
the
engine
management
system
to
enhance
vehicle
con
gle
solenoid
valve
.



trol
.
The
main
function
of
the
AST
system
is
to
maintain
the
rolling

contact
between
the
tires
and
the
road
surface
under
al¡
driving
E36
cars
equipped
with
ABS/AST
utilize
a
four
channel
sys-



conditions
.
This
is
achieved
through
exact
application
and
tem,
which
functionsexactly
as
the
three
channelsystem



management
of
braking
and
drivetrain
forces
.
above,except
that
the
rear
wheels
are
modulated
individually
.

IDLE
SPEED
CONTROL
VALVE

HROTTLE
PLATE

6
.

Í
III

i



ADS
ACTU
AT
OR

THROTTLE
PLATE
POSITION
SENSOR

DME

Fig
.
6
.
All
Season
Traction
(AS)
works
withother
drivetrain
systems
to
enhance
vehicle
control
.

INTEGRATED
SYSTEMS

The
throttle
control
system
used
in
AST
is
illustrated
in
Fig
.

MASS
AIR
FLOW
SENSOR

JADS
THROTTLE
PLATE
POSITION
SENSOR

0013006