1992 BMW 318i Fuel pump relay

[x] Cancel search: Fuel pump relay

Page 46 of 759

BMW 318i 1992 E36 Workshop Manual 
100-4
ENGINE-GENERAL



	

TEMP

PRECAT

	

POST
CAT

	

OXYGENSENSOR
HEATING

#
.
THROTTLE
POSITION

	

FUEL
INJECTOR
CONTROL
(SEQUENTIAL)

OPERATING
POWER

	

00

CAMSHAFT
POSITION
SENSOR

ECM

Page 48 of 759

BMW 318i 1992 E36 Workshop Manual 
100-6
ENGINE-GENERAL

Cylinder
compression,
checking

A
compression
tester
is
needed
to
make
a
compression
test
.

To
obtain
accurate
test
results,
the
battery
and
starter
must
be
capable
of
cranking

Page 52 of 759

BMW 318i 1992 E36 Workshop Manual 
100-
1
0
ENGINE-GENERAL

Table
d
.
OBD
I
Fault
(Blink)
Codes
(continued)

(1992-1995
modeis
only)

Graphic
representation
of
flashing
Check
Engine
light
fault
code
:
1221
-
;
5
Seconds
.
;--~
2
.5
r

Page 57 of 759

BMW 318i 1992 E36 Workshop Manual 
al
Icld

Table
e
.
Engine
Driveability
Troubleshooting

c
l

	

1

	

I

	

f

	

I

	

I
Oxygen
sensor
faulty

	

Test
oxygen
sensor
.

ENGINE-GENERAL
100-
1
5

SYMPTOMS

a
.
Engine
fafs
tostart

b

Page 147 of 759

BMW 318i 1992 E36 Workshop Manual 
GENERAL
.
.
.
.
.
.
.
.
.
...
.
.
.
.
.
.
.
.........
130-2

	

Intake
air
temperature
(IAT)
sensor,

Principles
of
Operatinn
.
.
.
.
.
.
.
.
.
.........
130-2

	

testing
and
replacing
...
.
...
.
.

Page 153 of 759

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

Page 154 of 759

BMW 318i 1992 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 318i 1992 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:   1-8 9-16 17-24 25-32 33-40 ... 56 next >