1997 BMW 318i Injection

GENERAL

E36
cars
are
equipped
with
integrated
automatic
heating

and
air
conditioning
systems
.
Many
of
the
procedures
given
in

this
repair
group
require
that
the
A/C
refrigerant
charge
be

evacuated
using
specialized
equipment
.
See
A/C
System
Warningsand
Cautions
later
in
this
repair
group
.

HEATER
AND
CONTROLS

Blower
motor,
removing
and
installing

NOTE-

On
6-cylinder
cars,
the
plastic
top
enginecover
and
fuel
rail
covermustbe
removed
.
The
fuel
injectorhamess
re-
taining
screws
must
be
removed
and
the
harness
set
aside
.
The
engine
control
module
(ECM)
cover
must
be
removed,
the
control
unit
connectors
unplugged
and
the
harness
pulled
out
of
the
way
.
See
130
Fuel
Injection
.

1
.
Disconnect
negative
(-)
cable
from
battery
.

2
.
Open
hood
.
Unclip
engine
bulkhead
plenum
grille
at

base
of
windshíeld
and
remove
grille
.
See
Fig
.
1
.

HEATING
AND
AIR
CONDITIONING



640-1

640
Heating
and
Air
Conditioning

GENERAL
.
...
.
....
.
.
.
.
.
.
.
.
.
.......
.
.
.
640-1



Heater
andA/C
air
distribution
motor,

replacing(rotary-knob)
.
.
...
.
.
.
.......
.
640-10

HEATER
AND
CONTROLS
.
.....
.
.
.
.
.
.
.640-1



Rear
Window
Defogger
.
.
.



.
.
.
.
.
.
.
...
.
.
.
640-10
Blower
motor,
removing
and
installing
.
.
.
.
.
.
640-1



Rear
Window
Blower
(convertible
models)
.
.640-10

Blowermotor
resistor
pack,
replacing



.
.
.
.
.
.
640-3



AIR
CONDITIONING
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-11
Heater
valve,
replacing
...........
.
.
.
.
.
.
.
640-3

Heater
box,
removing
and
installing
.
.
.
.
.
.
.
.
640-4



A/CSystem
Warnings
and
Cautions
.
.
.
.
.
.
:640-11

Heater
core,
replacing
.....
.
.
:
....
.
.
.
.
.
.
.
640-6



A/C
compressor,
replacing
.
.
::.
:
:
.
.
.
.
.
.
.
.640-12

Heater
core
temperature
sensor,
replacing
.
.
640-7



A/C
Compressor
Clutch
.
.
.
.
.
.
.
:
.
.
.
.
.
.
.
.
.
640-13

Heater
andA/C
Control
Head
.
.
....
.
.....
.
640-7



A/C
condenser,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-14

Heater
andA/C
control
head,
removing



A/C
receiver/drier,
replacing
.
.
.
.
.
.
.
.
.
.
.
.
.
640-15
and
installing
(rotary-knob)
.
.
....
.
......
640-7



A/C
expansion
valve,

Heater
andA/C
control
head,
removing



removing
and
installing
...
.
.....
.
.
.
.
.
.
.
640-16
and
installing
(digital-display)
.
.....
.
.....
640-8



A/C
evaporator,
removing
and
installing
.
.
..
640-17

Heater
andA/C
control
module,removing



A/C
evaporator
temperature
sensor,

and
installing
(rotary-knob)
.
.
...
.
.
.
.
.
.
.
.
640-8



replacing
.
.
.
.
.
.
..............
.
.
.
.
.
..
640-17

Heater
andA/C
control
module,removing



A/C
microfilter,
replacing
......
.
....
.
.
.
..
640-18

and
installing
(digital-display)
.
...
.
.
.
.
.
...
640-8

Sensor
fan
for
interior
temperature,



TABLES

replacing
.
.
.
....
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
640-9



a
.
Blower
Motor
Test
Values
.........
...
.
.
......
640-3

Heater
andA/C
AirDistribution
Motors
.
.
.
.
.
.
640-9



b
.
Heater
Core
Temperature
Sensor
Test
Values
...
.640-7

c
.
Evaporative
Temperature
Sensor
Test
Values
...
640-17

d
.
A/C
System
Fluid
Capacities
(total)
..
..........
640-18

0012527

Fig
.
1
.
Detach
grille
retaining
clips
(arrows)
and
pull
grille
upward
and
out
of
rubbergasket
.

CAUTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautionsgiven
at
the
front
of
this
manual
onpage
viii
.

HEATER
AND
CONTROLS

ELE-70
ELECTRICAL
WIRING
DIAGRAMS

I



02
SENS
SIB
I"7
7
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02SENSGNDI)
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2



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,
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I
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RELAY
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B'=RN
I
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),
BRN
I



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3~
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S~
ENGINECONTROL
MODULE
(DME)

13B
START



1
GRN
I
DN

OFF
IGNITION
S
WITCH

8727
3

HOTATALLTIMES

UELINJECTION
VALVES

NCA"
=
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INCA
SPIN

BRN
GRN
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OF
N



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GRN

Engine
Management

19921
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(1
of
2)

HOTAT
F4
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2S



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FRONT_POWERDISTRIBUTIONBO%
_
_
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_
_
_
____
_
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ENGINE
CONTROL
MODULE
RELAY



FUEL
PUMP
RELAY

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ECMFLY
CTRL
1)27



BFN
FP
FLY
CTRL
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I'



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02SFLYCTRL
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37



BRNIGRN



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1
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I4Y
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2Y
SY
BX
BY
4YBY

EVAPORATIVE



IDLESPEED



INTAKE
AIR
EMISSION
CONTROL
RESONANCE
VALVE



VALVE



CHANGEOVER
VALVE

ELE-72
ELECTRICAL
WIRING
DIAGRAMS

8727
5

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BRN/WHT
I



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INJ2I
5
I
BRNIRED
NJ
3
IJ4



BRNIYEL
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33
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INJD
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CTRL
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FP
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OTRL
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02SRLV
CTRL
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II

GROUND
1)34



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GROUND
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S
SB
=
CYL61GNCOILI
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BLK/WHT
I
CYLI!ONCO(L,
56
GRN
START/RUN
T
L______
ENGINECONTROL
MODULE
IOM
E)

HOTATALLTIMES
1
30
START
I
I
OFF
I
L_---_I
IGNITION
S
WITCH

1112
N3
N4
M5N6

Engine
Management

19922
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(1
of
2)

FUEL
INJECTION
VALVES

117111
1121
1-

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COILS

FRONT
FO
W
ERDISTRIBUTION
BOX

871
851
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30y



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.
864,
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RED/WHT
////
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ENGINE
CONTROL
MODULE
RELAY

~2~
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.



;
3121



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;
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CYLINDER
1



CYLINDER2



CYLINDER3



CYLINDER4



CYLINDERS



CYLINDERS



G703



IDLE
SPEED



EMISSION
CONTROLVALVE
VALVE

CYL
1-6
FUEL
PUMP
RELAY

.J

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N
BRN/GRN



I
GRN/VIO
BRN/GRN



BRN/GRN
RED/WHTREO/WHT
RED/WI-IT



RED/WHTRED/WHT

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BATTERVI
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ELE-74
ELECTRICAL
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DIAGRAMS

8727
7

IGNITION
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in
RED
BATTERY
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1'27
BRN
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WHT/VEL

TXDI88
WHT/VIO



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/
GRN/VIO

FPRLYCTRL
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/



BRNIGRN



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023HTRCTRLI
37



BRN/GRN



BRNGRN
COMPUTER
WHT/VEL



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ANTI-



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BLK/BLU



BLK
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SYSTEM



VEL023SIGNAL
I



70
71
BLK



SILK
02S
SIG
GND
I



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A/C
COMP
CUT
148
BLK/BLU



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WHTIBLK

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fia
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CYL2101COIL
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B,
-
RN~
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SC
BRN
GROUNDI~

FUEL
INJECTION
VALVES

Engine
Management
1993-951
.8L
(1
of
2)

FRONTPOWERD_IS_TRI_BU_TIO_NBOX



_
______
I



ENGINE
CO
NTROL
MODULE
RELAY



FUEL
PUMP
RELAY

-~
I



I
CVL1



DVL2



CVL3



CYL4



A/T
RANGE



TRANSMISSIONCONTROLMODULE
(EGS)
SWITCH

ELE-76
ELECTRICAL
WIRING
DIAGRAMS

1
87279

SOLIDSTATE

SOLENOIO
VALVE
(RUNNING
LOSSES)
(1995
ONLY)



CYLl



CVL2



CVL3



CYL4



CYL5



CVLS

31
~e
BRN
1



1



Bt



LKIVEL
50
55
GRN
30-7
RED
CYL21NJI~
CVL3INJ1
~
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BATTERY(
2
CYL5INi
)



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j
~
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BB
PN
CYLSINJI
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THROTTLE
FLAP
1)12



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WHT/GRN
EMLSIGNAL
)
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ENGINECONTROL
MODULE(DME)

HOTATALLTIMES

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STA



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RT



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1
GRN
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GRN1
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IGNITION
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Engine
Management

1993-952
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(1
of
2)

FUEL
INJECTION
VALVES

STARTING
SYSTEM

1995
ONLY
r~I
~~

f

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COILS

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DISTRIBUTION
BO%

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1995
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Bt
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POINT

CYL
1-fi
FUEL
PUMP
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GRNIVIO

BPN/GRN

RED
RED

WIEGS

RED/WHT
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CYL4



CYL5



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IDLE
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EMISSION
ACTUATOR



SLIP
CONTOLMODULE
CONTROLVALVEVALVE
(PBS/AS
C)

ELE-78
ELECTRICAL
WIRING
DIAGRAMS

I
ACTIVATEVALVE
I
I
ACTIVATEVALVE
I
31
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ITCH

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88547

UEL
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1996
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31811
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I
RED
TERMINAL15



31871
l~
(19970NLY)

Engine
Management

1996-971
.9L
:
(1
of
2)

HOTINACC,RUN
ANDS=ART
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USE
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1997,
199831871
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MODULE
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1998
31811
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MODULE
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f-W/EGS

ELE-80
ELECTRICAL
WIRING
DIAGRAMS

88893

UNLOADER
RELAY
TERMINAL
IS
(1997
ONLY)

VARIABLE
CAMSHAFT
CONTROL
VALVE
1

I
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