1997 BMW 318i crankshaft

10
.
On
cars
built
up
to
3/95
:
Slide
control
unit
off
front
of
cylinder
head,
hand
turning
the
exhaust
sprocket
clock-
wise
(as
viewedfrom
front)
as
the
unit
is
removed
.

11
.
On
cars
built
3/95
and
latee
:
Use
a
spanner
toolto
ro-
tate
exhaust
sprocket
until
stop
on'
intake
sprocket
is
contacted
.
See
Fig
.
39
.
Then
slide
control
unit
off
front
of
cylinder
head
.

EMAÑ

0012514

Fig
.
39
.
On
VANOS
control
unit
withspringplate
(cars
built
3/95
and
later),
rotate
exhaust
camshaft
sprocket
clockwise
until
intake



NOTE-
camshaft
contacts
stop
.
BMW
special
tool11
5490shown
.



BMW
special
tool
no
.
113
'390
is
a
dummy
chain
ten-
sioner
and
simulates
the
function
of
thetensioner
.

VANOS
control
unit,
installing

CAUTION
-

Incorrect
installation
of
the
VANOS
control
may
result
in
damage
to
the
engine
valvetráin
.

1
.
Lock
camshafts
and
crankshaft
in
TDC
positionwith
BMW
special
tools
as
described
above
in
removal
pro-

cedure
.

CA
UTION-

The
camshafts
and
crankshaft
mustbe
locked
in
the
TDC
position
using
BMW
special
tools
no
.
11
2
300and
113
240
.
If
the
camshafts
and
crank-
shaft
are
not
at
TDC,
the
valves
can
contact
the
pistons
when
the
engine
is
turned
over
.

NOTE-

Be
sure
the
secondary
timing
chain
tensioner
is
locked
down
and
the
exhaustcamshaft
mounting
bolts
are
loosebefore
proceeding
.

2
.
Remove
primary
timing
chain
tensioner
from
side
of

cylinder
head
.
See
Fig
.
40
.

CAMSHAFT
TIMING
CHAIN



117-
1
7

Fig
.
40
.
Primary
timing
chain
tensioner
(arrow)
.
Remove
tensioner
slowlyto
relieve
spring
tension
beneath
end
plug
.

3
.
Install
BMW
special
tool
no
.
11
3
390
into
primary
tim-
ing
chain
tensionersleeve
.
Thread
tool
in
finger
tight
to
remove
chain
slack
.

4
.
Hand
turn
secondary
sprocketsclockwise
(as
viewed
from
front
of
engine)
until
sprockets
contact
stops
.

5
.
Apply
a
small
amount
of
¡¡quid
gasketsealer
(3-Bond

1209
®
or
equivalent)
to
VANOS
housing
alignment

doweis
on
front
of
cylinder
head
.
lnstall
a
new
gasket
.

6
.
Push
VANOS
piston
gear
cup
finto
VANOS
housing
until

it
bottoms
out
in
housing
.
Position
VANOS
control
unitinto
place,
but
do
not
engage
splines
on
gear
cup
.

7
.
On
cars
built
up
to
3/95
:

"
Hand
turn
exhaust
sprocketcounterclockwise
(as

viewedfrom
front
of
engine)
only
enough
to
mesh
gear
cup
splines
with
camshaft
gear
:
"
Slowly
push
VANOS
control
unit
in
untilfully
seated,
guiding
chains
in
counterclockwise
direction
.

VANOS
(VARIABLE
VALVE
TIMING)

117-
1
8



CAMSHAFT
TIMING
CHAIN

CAUTION-

It
is
crítical
that
the
exhaustcamshaft
sprocket
be

turned
only
the
mínimum
amount
necessary
to

engage
the
gear
cup
.
If
this
procedure
is
done
ín-
correctly,
the
VANOS
system
may
not
function

throughout
íts
full
range
.

NOTE-

As
the
control
unit
isinstalled,
the
secondary
sprockets
will
rotate
in
the
counterclockwise
direction
.
It
may
be

necessary
to
guide
sprockets
counterclockwise
as
the

control
unit
is
installed
.

8
.
On
cars
built
from3/95
:
Use
a
spanner
tool
(See
Fig
.

39
.),
turn
exhaust
sprocket
counterclockwise
(as

víewed
from
front
of
engine)
only
enough
to
mesh

gear
cup
splines
with
camshaftgear
.
Slowly
push

VANOS
control
unit
towards
camshaft
until
it
is
fully

seated,guiding
chains
in
counterclockwise
direction
.

CA
UTION-

Ensure
that
the
first
available
tooth
engages
.

9
.
Install
and
tightencontrol
unit
nuts
and
bolt
.

10
.
Connect
harness
connector
to
VANOS
solenoid
.
Using

new
seals,
insta¡¡
oil
line
fitting
.

Tightening
Torques

"
VANOS
control
unitto
cylinder
head

M6
nut
.....
..
..
.
.
.............
10
Nm
(89
in-lb)

M8
bolt
.....
.
.
.
.
..
.............
22
Nm
(17
ft-Ib)

"
VANOS
oil
supply
line
to
control
unit
.
32
Nm
(24
ft-Ib)

11
.
Slowlyunlock
and
release
secondary
chain
tensioner
.

12
.
Preloadprimary
chain
by
tightening
BMW
special
tool

no
.
112
240
(dummy
chain
tensioner)
to
1
.3
Nm
(11
in-
lb)
.
Then
tighten
exhaust
camshaft
sprocket
mounting

bolts
alternately
in
two
stages
.

Tightening
Torque

"
Secondarytiming
chain
sprockets
to
camshafts

(Tora
boits)

Stage
1
..
...............
...
.
.
...
5
Nm
(44
in-lb)

Stage
2
..
...............
...
.
.
..
22
Nm
(17
ft-Ib)

VANOS
(VARIABLE
VALVE
TIMING)

13
.
Remove
flywheel
locking
tool
from
transmission
bell-

housing
.
Remove
camshaft
locking
tool
from
rear
of

cylinder
head
.

14
.
Turn
engine
over
by
hand
at
least
two
fui¡
crankshaft
ro-

tations
.
Reinstall
camshaft
locking
tool
and
flywheel

locking
toolto
make
sure
all
adjustments
are
correct
.
If

settings
are
correct,
remove
locking
tools
.

15
.
Remove
BMW
special
tool
112
420
(dummy
chain
ten-
sioner)
from
side
of
cylinder
head
.
Install
primary
chain

tensioner
so
that
cutout
in
tensioner
piston
engages

chain
rail
.
See
Fig
.
34
.
Using
new
seals,
install
and

tighten
access
plugs
in
VANOS
control
unit
.

Tightening
Torque

"
Access
plugs
to

VANOS
control
unit
.
..
.
.....
.
..
...
50
Nm
(37
ft-lb)

"
Primary
timing
chain
tensioner
plug
to
tensioner
sleeve

M50/S50USengine
.
.
..
.
.
...
.
...
..
50
Nm
(37
ft-Ib)

M52/S52US
engine
...
..
...
...
...
40
Nm
(30
ft-Ib)

16
.
Install
oil
baffle
cover
above
intake
camshaft
.
Install

three
cylinder
head
covermounting
studs
to
rear
of

head
.
Instali
cylinder
head
cover
.

Tightening
Torque

"
Cylinder
head
cover

to
cylinder
head
(M6
screws)
......



10
Nm
(89
in-Ib)

17
.
Installationof
remaining
parts
is
reverse
of
removal
.

NOTE-

Be
sure
to
install
the
ground
wíres
at
the
cylinder
head
cover
mounting
studs
and
at
the
front
of
the
cylinder
head,
if
applicable
.

119-
8



LUBRICATION
SYSTEM

17
.
Installation
is
reverse
of
removal
.

"
Thoroughly
clean
all
old
gasket
material
from
mating

surtaces
anduse
a
new
gasket
.

"
Applya
small
amount
of
non-hardening
sealer
(3-Bond

1209
0
or
equivalent)
to
oil
pan
gasket
directly
below

joints
for
and
cover
and
front
timing
case
cover
.
See

Fig
.
12
.

"
Tighten
oil
pan
bolts
starting
at
front
first,
working
to-

wardback
(transmission)
end
.

"
Fill
engine
with
oil
as
described
in
020
Maintenance

Program
.

"
After
addingengine
oil,
start
and
run
engine
.
Raiseen-

gine
speed
to
2,500
rpm
until
oíl
pressure
warning

lampgoes
out
(about
5seconds)
.

OIL
PUMP

applied
(arrows)
.
Apply
a
bead
3
mm
wideby
2
mm
high
.

WARNING
-

"
Always
use
new
bolts
when
mounting
the
sub-

frame
to
the
body
.
The
one-time
only
bolts
should
be
replaced
any
timethey
are
removed
.

"
Special
installation
instructions
apply
when
in-
stalling
the
front
suspension
crossmember
to
the
body
.
See
310
Front
Suspension
for
fastener
specifications
and
tightening
torques
.

Fig
.
12
.
Joint-mating
areas
at
oil
pan
gasket
where
sealer
should
be

Center
the
steering
spindle
to
the
steering
rack
before
in-

stalling
the
steering
column
shaft
.
See
320
Steering
and

Wheel
Alignment
for
more
specific
procedures
.

Tightening
Torques

"
Control
arm
bushing
carrier

to
body
(M10
bolt)
...............
47
Nm
(35
ft-Ib)

"
Engine
mount
to

suspension
crossmember(M10
nut)
..
42
Nm
(31
ft-Ib)

"
Oil
pan
to
engine
block
(M6
bolt)

8
.8
grade
...........
.......
....
10
Nm
(89
in-lb)

10
.9
grade
...........
..
...
...
.
12
Nm
(106
in-lb)

"
Stabilizer
bar
link

to
control
arm
(M10
nut)
.......
....
42
Nm
(31
Ib-ft)

"
Steering
column
universal
joint

to
steering
rack
spindle
(M8
bolt)
....
19
Nm
(14
ft-Ib)

"
Suspensíon
crossmember

to
body
...
...
.
...
..
.
.
See
310
Front
Suspension

OIL
PUMP

Oil
pump,
removing
and
installing

(4-cylinder
engine)

Oil
pressure
on
M42
and
M44
engines
is
generatedbya

gear-type
pump
mounted
to
the
rear
of
the
front
engine
cover

(timing
chaincase)
.
The
pump
is
gear-driven
off
the
front
of

the
crankshaft
.

NOTE-

Oil
pump
removal
requires
lowering
of
the
front
sus-

pension
and
removal
of
the
oil
pan,
as
well
asremoval
of
the
timing
chain
assembly
.

1
.
Disconnect
negative
(-)
battery
cable
from
battery
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
paga
vÍii
.

2
.
Drain
engine
oil
as
described
in
020
Maintenance
Pro-

gram
.

3
.
Withengine
cold,
drain
coolant
.
See
170
Radiator
and

Cooling
System
.

4
.
Remove
top
cover
from
oil
filter
housing
to
allow
engine

oil
to
drain
into
oil
pan
.
Remove
oil
pan
as
described

earlier
.
Reinstall
oil
filter
cover
.

5
.
Remove
alternator
.
Unbolt
power
steering
pump
from

bracket,
then
remove
alternator
mountíng
bracket
.
See

121
Battery,
Starter,
Alternator
.

6
.
Remove
crankshaft
vibration
damper
andhub
.
Then
re-

move
upper
and
lower
timing
chain
covers,
complete

timingchain,
chain
sprockets
and
chain
guides
.
See

117
Camshaft
Tíming
Chain
.

119-
1
0



LUBRICATION
SYSTEM

Oil
pump,
removing
and
installing

(6-cylinder
engine)

Oil
pressure
on
the
6-cylinder
engines
is
generated
by
a
gear-type
pump
bolted
to
the
bottom
of
the
engine
block
.
The
oil
pump
is
chain
driven
off
the
front
of
the
crankshaft
.

NOTE-

Oil
pump
removal
requires
raising
the
engine
(cars
built
up
to
9-92)
or
lowering
the
front
suspension
crossmem-
ber
(cars
built
from
9-92)
to
remove
the
oil
pan
.

1.
Drain
oil
as
described
in
020
Maintenance
Program
.

2
.
Remove
oil
pan
as
described
earlier
.

3
.
Remove
oil
pump
sprocket
mounting
nut
(left-hand
thread)
.
See
Fig
.
16
.
Lift
sprocket
off
together
with
drive
chain
.

Fig
.
16
.
Oil
pump
sprocket
mounting
nut
(left-hand
thread)
on
6-cylin-
der
engine
(arrow)
.

4
.
Remove
mounting
bolts
from
oil
pump
and
oil
pump
pickup
tube
.
Withdraw
pump
.

NOTE-

Note
any
spacers
between
pump
and
engine
block
.
See
Fig
.
17
.

"
Note
position
of
locating
dowels
.

OIL
PUMP

811186

0011952

Fig
.
17
.
Oil
pump
mounting
points
(1)
and
pickup
tube
mountíng
points
(2)
.

5
.
Remove
coverfrom
oil
pump
and
check
for
wear
or
scoring
.
Spin
oil
pump
shaft
and
check
that
gears
turn
smoothly
.
Replace
pump
if
gears
spinwith
difficulty
or
any
wear
is
present
.

6
.
Installation
is
reverse
of
removal,
noting
the
following
:

"
Align
sprocket
splines
to
oil
pump
shaft
splines
before

tightening
sprocket
nut
.

Tightening
Torques

"
Oil
pump
to
engine
block
(M8)
......
22
Nm
(16
ft-Ib)

"
Oil
pan
to
engine
block
(M6
bolt)

8
.8
grade
..
...
.
...
...
.
.........
10
Nm
(89
in-lb)

10
.9
grade
.
...
.
..
....
.
........
12
Nm
(106
in-lb)

"
Oil
pump
sprocket
to
oil
pump
shaft
(M1
0x1
left-hand
thread)
..........
25
Nm
(18
ft-Ib)

GENERAL
.
........
.
...........
.
.
.
.
.
.
.
120-1



Camshaft
Position
(CMP)
Sensor
....
.
.
.
...
120-6

Disabling
Ignition
System
.
.
.
.
.....
.
.
.
.
.
.
.
120-2



Camshaft
position
(CMP)
sensor,
replacing

Warnings
and
Cautions
.
.
.
.
.
.
.....
.
.
.
.
.
.
.
120-2



(4-cylinder
engine)
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...
120-6

Camshaft
position
(CMP)
sensor,
replacing

IGNITION
SYSTEM
DIAGNOSTICS
.
.
.
.
.
.
120-3



(6-cylinder
engine)
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
120-7
Basic
Troubleshooting
Principles
...
.
.
.
.
.
.
.
120-3



Knock
sensors,
replacing
.
.
...
.
.
.
.
.
.
.
.
.
.
.
.
120-7

Ignition
Firing
Order
.....
.
...
.
.
.
.....
.
.
.
.120-7

IGNITION
SYSTEM
SERVICE
.
.........
.
120-3

Checking
for
Spark
..
.
.
.
.
.
.
.
.
.
.......
.
.
.
120-3

Ignition
coil,
testing
and
replacing

(4-cylinder
engine)
.
.
.
.
.
.
.
.
.
.
.........
.
120-3

Ignition
coil,
testing
and
replacing

(6-cylinder
engine)
.........
.
..........
120-4

Crankshaft
Positionlrpm
Sensor
.......
.
...
120-5

Crankshaft
position/rpm
sensor,
testing
and

replacing
(front
mounted)
.........
.
.
.
.
.
.
120-6

Crankshaft
position/rpm
sensor,replacing

(rear
mounted)
.....
.
.....
.
.....
.
.
.
.
.
.
120-6

GENERAL



Troubleshooting
and
testing
of
the
engine
management

system
should
be
carried
out
using
the
BMW
specialized
ser

This
repair
group
covers
repair
andcomponent
replace-



vice
tester
(scan
tool)
.

ment
information
for
the
ignition
system
.
All
engines
use
a
distributorless
ignition
system
with
indívid-

ual
ignitioncoils
for
each
cylinder
.
There
is
no
distributor
cap

NOTE-



or
ignition
rotor
.
Each
coil
can
be
selectively
controlled
by
the

"
Spark
plug
replacement
is
covered
in
020
Mainte-



engine
control
module
on
a
cylinder-by-cylinder
basis
.
On
later

nance
Program
.



systems,
knock
sensors
are
used
to
monitor
and
control
igni-

"
For
fuel
related
troubleshooting
and
testing,
see
130



tion
knock
(ping)
and
adjusttiming
accordingly
.

Fuel
lnjection
.
Ignition
timing
is
electronically
controlled
and
not
adjust-

All
engines
covered
by
this
manual
use
an
advanced
en-



able
.
The
engine
control
module
(ECM)
usesengine
load,
en-

gine
management
system
.
The
engine
management
system



gine
speed,
coolant
temperature,
and
intake
air
temperature

incorporates
on-board
diagnostics,
fuel
injection,
ignition
and



as
the
basic
inputs
for
timing
control
.
Knock
detection
is
also

other
advanced
engine
control
functions
.



an
input
to
the
control
module,
where
applicable
.

Table
a
.
Engine
Management
System
Variants

Engine
code



1
System

4-cylinder
M42
(1.8
I)



Bosch
DME
Ml
.7
M44
(1
.9
I)



Bosch
DME
M5
.2
(OBD
II)

6-cylinder
M50
1992
(2.5
I)



Bosch
DME
M8
.1
1993-1995
(2
.5
I)



Bosch
DME
M33
.1
M52
1996-1998
(2.8
I)



Siemens
MS
41
.1
(OBD
II)

1998
(2
.5
I)



Siemens
MS
41
.1
(013D
11)
S50US
(3.0
I)



Bosch
DME
M3
.3.1
S52US
(3.2
I)



Siemens
MS
41
.1
(OBD
II)

120
Ignition
System

IGNITION
SYSTEM



120-1

IGNITION
SYSTEM
SCHEMATICS
...
.
.
.
.120-7

TABLES

a
.
Engine
Management
System
Variants
......
120-1

b
.
Ignition
Coil
Resistance
(M42
engine)
......
120-4

c
.
Ignition
Coil
Resistance
(M44
engine)
......
120-4

d
.
Ignition
Coil
Resistance

(6-cylinder
engine)
..
.
.
.
.
.
.
.
.
.
.
.
.....
.
..
120-5

NOTE-

All
engines
coveredby
this
manual,
with
theexception

of
the
1992
M50,
incorporate
knocksensors
as
part
of

the
engine
management
system
.

The
initial
ignition
point
is
determined
by
the
crankshaft
po-

sition/rpm
sensor
during
cranking
.
Once
the
engine
is
run-

ning,
timing
is
continually
adjusted
based
on
operating

conditions
.
A
characteristic
ignition
map
is
shown
in
Fig
.
1
.
A

map
similar
to
the
one
shown
is
digitally
stored
in
the
engine

control
module
.

GENERAL

CAUTION
-

The
wiring
to
termina¡
15
(+)
of
the
coil(vía
the
ig-

nition
switch)
is
not
fuse
protected
.
Use
care
when
testíng
thiscircuit
.

4
.
Turn
ignition
off
.

5
.
Use
a
multimeter
to
test
coil
primary
resistanceat
coil

terminals
.
See
Table
d
.

Table
d
.
Ignition
Coil
Resistance

(6-cylinder
Engine)

Terminals
Resistance

(referto
Fig
.
4
.)

Coil
primary



1
1
(-)
and
15
(+)



X
0
.4-0
.8
ohms

Coil
secondary



l
N
.A
.



N
.A
.

6
.
Remove
coil
and
inspect
coil
housing
for
hairline
cracks

or
leaking
casting
material
.
See
Fig
.
7
.
A
leaky
ignition

coil
may
indícate
a
faulty
engine
control
module
(ECM)
.

Check
ECM
before
installing
a
new
coil
.

811004

Fig
.
7
.



Ignition
coil
being
removed
on
6-cylinder
engine
(M52
engine

shown)
.

CA
UTION-

"
Note
location
of
coil
ground
straps
before
coilre-

moval
;
reinstallin
the
same
location
.

"
When
replacing
ignition
coils,
ensure
that
the
re-

placement
coil(s)
are
from
the
same
manufactur-

er
containing
the
same
partlcode
numbers
.
If

individual
coils
with
the
correct
specifications
are
not
available,
all
coils
should
be
replaced
.

IGNITION
SYSTEM



120-
5

Crankshaft
Position/rpm
Sensor

If
the
engine
control
module
(ECM)
does
not
receive
a

crankshaft
position
signal
during
cranking,
the
engine
will
not

start
.

On
1992-1995(pre-OBD
II)
cars,
the
crankshaft
posi-
tion/rpm
sensor
is
mounted
on
the
front
engine
cover
and

reads
the
toothed
vibration
dampener
wheel
.
See
Fig
.
8
.

Fig
.
8
.



Crankshaft
position/rpm
sensor
mounted
at
front
of
engine
on
1992-1995
cars
.
(arrow)
.

On
1996
and
latee
cars
(OBD
II
compliant),
the
crankshaft
position/rpm
sensor
is
mounted
in
the
left
rear
side
of
the
cyl-

inderblock
.
The
sensor
reads
a
toothed
wheel
mounted
to
the

end
of
the
crankshaft
.
See
Fig
.
9
.

Fig
.
9
.



Crankshaft
position/rpm
sensor
toothed
wheel
mounted
to

rear
of
crankshaft
OBD
II
compliant
cars
.
The
sensor
is

mounted
in
the
left
rear
side
of
the
cylinder
block
.

IGNITION
SYSTEM
SERVICE

120-
6



IGNITION
SYSTEM

Crankshaft
position/rpm
sensor,

testing
and
replacing
(front
mounted)

1
.
Disconnect
sensor
harness
connector
.

2
.
Using
a
digital
multimeter,
check
resistance
between
terminals
1
and
2
in
connector
.
See
Fig
.
10
.

n1
n2n3

Fig
.
10
.
Crankshaft
position/rpm
sensorconnector
.

Crankshaft
positionlrpm
sensor
specifications

"
Coil
resistance
(approx
.)
terminais
1
and
2
....
.
..
...
....
1280
±
10%
ohms

"
Air
gap
(sensor
distance
from
toothed
wheel)
..
.
.
........
.1
.0
±
0
.3
mm
(0
.04
±
0
.01
in
.)

3
.
If
the
resistance
is
not
correct,
the
sensor
is
faulty
and
should
be
replaced
.

NOTE
-

When
installing
the
new
sensor,
be
sure
thewiring
Is
rerouted
in
the
same
orientation
.
Secure
the
sensor
us-
ing
new
wire
ties
.

Tightening
Torque

"
Crankshaft
position/rpm
sensor
to
mounting
bracket
.........
.
.
5
t
1
Nm
(62
t
9
in-lb)

Crankshaft
position/rpm
sensor,



4
.
Installation
is
reverse
of
removal
.
Use
a
new
O-ring
replacing
(rear
mounted)



when
installing
sensor
.
Be
sure
wiring
is
rerouted
in
same
orientation
.
1
.
Disconnect
sensor
harness
connector
.

6502AGN56

2
.
Locatesensor
on
rear
left
sideof
cylinder
block
.
Re-
move
sensormounting
bolt
and
remove
sensorfrom
cylinder
block
.

IGNITION
SYSTEM
SERVICE

3
.
Installation
is
reverse
of
removal
.
Use
a
new
O-ring

when
installing
sensor
.
Be
sure
wiring
is
rerouted
in
same
orientation
.
Secure
sensor
using
new
wire
ties
.

NOTE-

It
may
be
easier
to
remove
the
sensor
working
from
the
underside
of
the
vehicle
.

Camshaft
Position
(CMP)
Sensor

The
camshaft
position
(CMP)
sensor
is
usedby
the
engine
management
system
for
sequential
fuel
injection
and
knock
control
.

Camshaft
position
(CMP)
sensor,

replacing
(4-cylinder
engine)

1
.
Remove
CMP
sensorfromtop
timing
cover,
just
above
coolantthermostat
housing
.
See
Fig
.
11
.

Fig
.
11
.
Camshaft
position
sensor
mounting
bolt
(arrow)
.
M42
engine
shown
.

2
.
On
M42
engines
to
9/93
:
Disconnect
CMP
harness
plug
just
above
oil
filter
housing
.

3
.
On
M42
from9/93
and
all
M44
engines
:
Remove
upper
intake
manifold
as
described
in
113
Cylinder
Head
Re-
moval
and
Installation
.
Then
unplug
CMP
sensor
har-
ness
connector
below
manifold
.

120-8



IGNITION
SYSTEM

1



1
.0
GN



1
.0
Gl
.0
GN
I



Ign
coil



1
.0
GN
.

Tti



%ti



r,



_%ti
_



_
ice_
I



25



52
5524



51



54



56
I



Power
input



power
input

t



U



Engine
Control
Module
(Bosch
DME
Ml
.7)



II



Powerinput
Mainrelaycontrol
I
15
42



43



16442868
67



34
6
26



27
1
-----



__
V



_



--



_

~
8K



.35
BK
.35
13,1
1



.35
YE



1



.35
BK35
VE
.35

3



cyl
.1

1

11

E

S
2

1
.0
BR

2
.5
BR

Ign
.
coil
cyl
.
3



II

Ign
.
coil



Ign
.
coil
3



cyI
.
2



1
Y
_
Y
2



k
3



cyl
.
4

IGNITION
SYSTEM
SCHEMATICS

Battery
voltage
in
run
or
start
(
vía
ignition
switchterminal
15)



WIRING
COLOR
CODE
4
.0
GN

1
.0
BR'V
.

Camshaft
Knock
Sensor
Knock
Sensor



Position
(cyl
.1-2)
(cyl
.3-4)



Sensor

Fig
.
13
.
Bosch
DME
M1
.7
ignition
system
circuit
for
M42
engine
.

Ground
(RH
rearof
engine
compartment,
rear
of
shock
tower)

N[INS

Crankshaftlrpm
Position
Sensor

Battery
voltage
in
run
or
start
(vía
main
relay
terminal
87)

Ground
(RH
rearof
engine
compartment,
rearof
shock
tower)

5GN

BK
-
BLACK
BR
"
BROWN
RD
-
RED
YL-
YELLOW
GN
-
GREEN
BL
-
BLUE
VI
-
VIOLET
GY
-
GREY
WT
-
WHITE
PK
-
PINK

Warning
:
Lethal
voltagepresent

Battery
voltage
at
all
times
to
Main
relay
(terminal
85)

'Y
Y

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

0013087