1994 BMW 325i Wire diagram

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Page 116 of 759

BMW 325i 1994 E36 Workshop Manual 
119-2

	

LUBRICATION
SYSTEM

NOTE-
Component
Location

	

If
the
light
does
not
go
out,
thewiring
to
theswitch
is"
Oil
pressure
switch

	

most
likely
grounded
somewhere
between
the
switch

all
engi

Page 128 of 759

BMW 325i 1994 E36 Workshop Manual 
120-
4

	

IGNITION
SYSTEM

2
.
Check
for
battery
voltage
o
cofs
.
If
voltage
is
not

	

Table
b
.
Ignition
Coil
Resistance

present,
check
wire
between
terminal
15
and
ignition

	

(M42
Engine)
swit

Page 148 of 759

BMW 325i 1994 E36 Workshop Manual 
130-2

	

FUEL
INJECTION

GENERAL

This
repair
group
covers
fuel
injection
system
component

testing
and
repair
.
Special
equipment
is
necessary
for
some

of
the
procedures
given
in
this
repair
group

Page 153 of 759

BMW 325i 1994 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

Page 154 of 759

BMW 325i 1994 E36 Workshop Manual 
130-
8

	

FUEL
INJECTION

Fig
.
8
.

	

Fuel
pump
relayterminal
identification
.
1.
Peel
back
rubber
boot
on
oxygen
sensor
electrical
har-
ness
connector
(car
wiring
side)
.
With
connector
at-
Oxyge

Page 155 of 759

BMW 325i 1994 E36 Workshop Manual 
Oxygen
Sensor
FUEL
DELIVERY
TESTS
FUEL
INJECTION

	

130-
9

"
Voltage
at
¡dle
..
.
..
..
....
0
.2
to
0
.8
VDC,
fluctuating

	

Checking
fuel
delivery
is
afundamental
part
of
trouble-
shooting
and

Page 166 of 759

BMW 325i 1994 E36 Workshop Manual 
130-20

	

FUEL
INJECTION

Fig
.
29
.
Throttleposition
sensor
terminal
identification
on
M50
engine
.

Tableg
.
Throttle
Position
Sensor
Tests

(DME3
.113
.3
.1)

Test
conditions

	

I
Terminals

Page 191 of 759

BMW 325i 1994 E36 Workshop Manual 
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
.
Th
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