Evap system BMW 318i 1998 E36 User Guide
Page 457 of 759
To
access
the
rear
window
blower
relay,
remove
the
glove
compariment
.
See
Fig
.
32
.
Fig
.
32
.
Rear
window
blower
relay
located
in
frontof
glove
compart-
ment
(arrow)
.
AIR
CONDITIONING
Thissection
covers
removal
and
installation
of
air
condition-
ing
refrigerant
components
.
A/C
testing
and
diagnosis,
refrig-
erantdischarge,
evacuatíon
and
recharge
are
not
covered
here
.
The
subassemblies
and
lines
of
the
air
conditionerare
filled
with
either
refrigerant
R12
(1992
cars)
or
R-134a
(1993
and
later
cars)
.
The
major
components
of
the
A/Csystem
are
shown
in
Fig
.
33
.
A/CSystem
Warnings
and
Cautions
WARNING
-
"
Always
be
careful
that
refrigerant
does
not
come
in
contact
with
your
skin
.
Always
wearhand
andeye
protection
(gloves
and
goggles)
when
work-
ing
around
the
AIC
system
.
If
refrigerant
does
come
in
contact
with
your
skin
oreyes
:
-Do
not
rub
skin
oreyes
;
-Immediately
flush
skin
oreyes
withcool
water
for
15
minutes
;
-Rush
to
a
doctor
orhospital
;
-Do
not
attempt
to
treat
yourself
.
"
Work
in
a
wefl
ventilated
area
.
Avoid
breathing
re-
frigerant
vapors
.
Exposure
may
irrítate
eyes,
nose,
and
throat
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.
"
Do
not
expose
any
component
of
the
AIC
system
to
high
temperatures
(Above
80°Cl176°F)or
open
flames
.
Excessive
heat
will
cause
a
pres-
sureincrease
whichcould
burst
the
system
.
HEATING
AND
AIR
CONDITIONING
640-
1
1
0013015
WARNING
-
"
Keep
refrigerant
away
from
open
llames
.
Poison-
ous
gas
will
be
produced
if
it
bums
.
Do
not
smoke
near
refrigerant
gases
for
the
same
reason
.
"
The
AICsystem
is
filled
with
refrigerant
gas
which
is
under
pressure
.
Pressurized
refrigerant
in
the
presenceof
oxygen
may
forma
combusti-
ble
mixture
.
Never
introduce
compressed
air
finto
any
refrigerant
container
(full
or
empty),
capped
off
AIC
component,
or
piece
of
service
equip-
ment
.
"
Refrígerant
gases
are
heavier
than
air,
displace
oxygen
and
may
cause
suffocation
in
areas
of
poor
círculation,
for
example
under
a
car
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.
"
State
and
local
governments
may
have
additional
requirements
regarding
air
conditioning
servic-
ing
.
Alwayscomply
with
state
and
local
laws
.
"
Electric
welding
near
refrigerant
hoses
causes
R-134a
to
decompose
.
Discharge
system
before
welding
.
CA
UTION
-
-As
of
January
1,
1992,
any
person
who
services
a
motor
vehicle
air
conditioner
must,
by
law,
be
properly
trained
and
certified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-approved
recycling
course
to
be
certified
.
"
It
is
recommended
that
al¡
system
refrigerant
AIC
refrigerant
be
left
to
an
authorized
BMW
dealer
or
other
qualified
AIC
service
facility
.
"
Do
not
top
off
a
partially
charged
refrigerant
sys-
tem
.
Dischargesystem,evacuate
and
then
re-
charge
system
.
"
R-134a
and
R-12
refrigerants
and
refrigerant
oils
and
system
components,
including
hoses
and
sealing
O-rings,
are
NOT
compatible
.
Compo-
nent
damage
andlor
system
contamination
will
result
.
"
The
mixture
of
refrigerant
oil
(PAG
oil)
and
refrig-
erant
R-134a
attacks
some
metals
and
alloys
(for
example,copper)
and
breaks
down
certain
hose
materials
.
Use
only
hoses
and
lines
that
are
iden-
tified
with
a
green
mark
(stripe)
or
the
lettering
R-
134a"
.
"
Immediately
plug
open
connections
on
AIC
com-
ponents
to
prevent
dirt
and
moisture
contamina-
tion
.
"
Do
not
steam
clean
condensers
or
evaporators
.
Use
only
cold
water
or
compressed
air
.
AIR
CONDITIONING
Page 461 of 759
Fig
.
42
.
Upper
A/C
condensermounting
bolts
(arrows)
.
8
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant
Capacities
.
A/C
receiver/drier,
replacing
The
A/C
receiver/drier
is
mounted
in
the
front
right
cornee
of
the
engine
compartment
behind
the
headlight
assembly
.
CAUTION-
The
receiver/drier
must
be
replaced
when
-There
is
dirt
in
the
AIC
system
-The
compressor
has
seized
or
has
been
re-
placed
for
any
reason
-The
condenser
or
evaporator
are
replaced
for
any
reason
-The
AIC
system
is
leaking
and
there
is
no
more
refrigerant
-The
AIC
system
was
open
for
24
hours
or
more
.
1
.
Following
manufacturer's
instructions,
connectan
ap-
proved
refrigerant
recovery/recycling/recharging
unit
to
A/C
system
and
discharge
system
.
2
.
Remove
right
headlight
assembly
.
See
630
Exterior
Lighting
.
CAUTION-
3
.
Disconnect
A/C
electrical
harness
connectors
.
See
Fig
.
Always
replaceO-rings
when
reconnecting
refrig-
43
.
erant
lines
.
4
.
Remove
refrigerant
pressure
lines
from
receiver/drier
.
Plug
lines
immediately
.
5
.
Remove
receiver/drier
mounting
bolts
.
0013182
6
.
Remove
underbody
splash
shield
on
passenger
side
.
See
Fig
.
44
.
7
.
Remove
passenger
side
brake
cooling
duct
.
Discon-
nect
outside
temperature
sensor
harness,
if
applicable
.
HEATING
AND
AIR
CONDITIONING
640-15
0012669
Fig
.
43
.
A/
C
receiver/drier
electrical
harness
connectors
(A),
pressure
line
retaining
bolts
(B),
andmounting
bolts
(C)
.
0012668
Fig
.
44
.
Passenger
sidesplash
shield
retaining
screws
(arrows)
.
8
.
Push
receiver/drier
down
andremove
from
underneath
car
.
Make
sure
that
receiver/drier
is
clear
of
any
electri-
cal
harnesses
.
9
.
Installation
is
reverse
of
removal
.
10
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant
Capacities
.
AIR
CONDITIONING
Page 462 of 759
640-16
HEATING
AND
AIR
CONDITIONING
A/C
expansion
valve,
removing
and
installing
Fig
.
45
.
Control
module
carrier
retaining
screws
(arrows)
.
1
.
Following
manufacturers
instructions,
connectanap-
proved
refrigerant
recovery/recycling/recharging
unit
to
A/C
system
and
discharge
system
.
WARNING
-
Do
not
discharge%harge
the
WC
system
without
properequipmentand
training
.
Damage
to
the
vehi-
cle
and
personal
injury
may
result
.
2
.
Remove
glove
compartment
and
glove
compartment
support
frame
.
See513
Interior
Trim
.
3
.
Remove
right
side
footwell
vents
.
4
.
Remove
right
side
control
module
carrier
screws
and
tilt
carrier
down
.
See
Fig
.
46
.
5
.
Remove
expansion
valve
cover
.
See
Fig
.
46
.
Fig
.
46
.
Four
screws
retain
expansion
valve
cover
(arrows)
.
AIR
CONDITIONING
0012666
0012663
6
.
Remove
A/C
refrigerant
line
fiange
bolt(s)
from
expan-
sion
valve
.
Plug
lines
immediately
.
See
Fig
.
47
.
NOTE
-
If
necessary,
remove
air
plenum
grille
fromrear
of
en-
gine
compartment
as
described
earlier
in
Blower
mo-
tor,
removing
and
installing
.
Remove
wiring
hamess
cover
screws
and
then
remove
right
side
plenum
screws
.
Reaching
finto
the
plenum
chamber,
remove
AIC
fine
flange
bolt
to
allow
expansion
valve
room
for
removal
.
Fig
.
47
.
Refrigerant
line
fiange
mounting
boltat
expansion
valve(arrow)
.
7
.
Remove
screws
from
top
of
expansion
valve
and
re-
move
expansion
valve
from
evaporator
.
See
Fig
.
48
.
Fig
.
48
.
Expansion
valve
mountingscrews
(A)
.
0011667
Page 463 of 759
CAUTION
-
Always
replace
O-rings
when
reconnecting
refrig-
erant
fines
.
9
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant
Capacities
.
A/C
evaporator,
removing
and
installing
1
.
Followingmanufacturer's
instructions,
connectanap-proved
refrigerant
recovery/recycling/recharging
unit
to
A/C
system
and
discharge
system
.
2
.
Remove
complete
heater
boxas
described
earlier
.
3
.
Remove
expansion
valve
as
described
earlier
.
4
.
Unfasten
evaporator
sensor
electrical
harness
connec-
tor
and
puli
out
sensor
from
ieft
side
of
heater
box
.
See
Fig
.
50
.
Fig
.
49
.
Pull
out
evaporator
sensor
from
housing
in
direction
of
arrow
.
5
.
Remove
rear
heater
box
cover
.
6
.
Remove
clips
retaining
lower
evaporator
housingcover
.
Tilt
outheater
core,
then
pull
evaporator
out
of
housing
.
7
.
Installation
is
reverse
of
removal
.
CAUTION
-
Always
reptace
O-rings
when
reconnecting
refrtg-
erant
fines
.
8
.
Before
recharging,
evacuate
system
for
at
least
30
min
.
Recharge
system
following
equipment
manufacturer's
instructions
.
See
Table
d
.
A/C
System
Refrigerant
Capacities
.
HEATING
AND
AIR
CONDITIONING
640-17
8
.
Installation
is
reverse
of
removal
.
A/C
evaporator
temperature
sensor,
replacing
ou12b46
The
evaporator
temperature
sensor
is
mounted
in
the
left
(driver)
side
of
theheater
box
behind
thecenter
console
.
1
.
Remove
lower
dash
panel
and
knee
boister
on
driver
side
.
See
513
Interior
Trim
.
2
.
Remove
left
footwell
ventilation
duct
byremoving
re-
taining
rivet
in
bottom
of
duct
.
Pull
it
down
and
away
from
heater
box
.
See
Fig
.
50
.
Fig
.
50
.
Left
footwellventilatíon
duct
(arrow)
.
0o1300ba
3
.
Disconnect
sensor
electrical
connector
from
heater
box
.
Pull
sensor
straight
out
of
heater
box
.
Refer
to
Fig
.
49
.
4
.
Installation
is
reverse
of
removal
.
Table
c
.
lists
evapo-
rator
temperature
sensor
test
values
.
Tablec
.
Evaporator
Temperature
Sensor
Test
Values
Test
temp
.
Resistance
23°F
(-5°C)
11
.4
-11
.9
k
ohms
32°F
(0°C)
8
.8
-
9
.2
k
ohms
41
°F
(5°C)
6
.8
-
7
.2
k
ohms
50°F
(10°C)
5
.3-5
.6
k
ohms
59
°
F
(15°C)
4
.2
-4
.5
k
ohms
68°F
(20°C)
3
.3
-
3
.6
k
ohms
77°F
(25°C)
2
.6-2
.9
k
ohms
86°F
(30°C)
2
.1
-
2
.3
k
ohms
95°F
(35°C)
1
.7
-1
.9
k
ohms
AIR
CONDITIONING
Page 539 of 759
84318
ASS
FRONT
REAR
RIGHT
DRIVER'S
BODY
DOME/
SWITCH
WIPER/DRIVER'S
PASSENGER'S
DRIVER'S
FRONT
DRIVER'S
MIRROR
DOORDOOR
ELECTRONICS
MAP
SUNROOF
SPATIAL
WASHER
MAKEUP
MAKEUP
SEAT
ASSSLIP
SPEED
SIDE
CONTROL
LOCK
HANDLE
CONTROLREADING
INERTIA
CONTROL
SOUND
INTERVAL
MIRROR
MIRROR
BELTCO
.TPOLMOOULESENSOR
MIRRORSWITCHHEATER
SWITCH
MODULE
ASSEMBLY
SWITCH
ASSEMBLY
(1996)
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ELECTRICAL
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DIAGRAMS
ELE-55
Ground
Distribution
1995-96
318ti
(2of3)
BE
.
PASSENGER'S
WIPER/
CRUISE
BODY
SEAT
PASSENGER'S
PASSENGER'S
CRASH
WASHER
ON-BOARD
CONTROL
ELECTRONICS
CONTROL
SEAT
SEATBACK
CRUIBECONTROL
CONTROL
MODULE
COMPUTER
ACTUATOR
CONTROL
CLUTCH
SWITCH
HEATER
HEATER
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MODULE
(TEMPOMAT)
MODULE
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(BC-LOW)
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MODULE
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AIR/
HEATING/
GLOVE
HEADLIGHT/
TRANSMISSION
CONTROL
IRKS
RECIRC-
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EVAPORATORTEMPERATURE
BOX
ANTI-
FOGLIGHT
ENGINE
POSITION
BLOWER
SWITCH
CONTROL
ULATION
CONTROLTEMPERATUREWHEEL
LIGHTTHEFT
HAZARD
CLEANING
HOOD
INDICATOR
MOTOR
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MODULE
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DRIVER'S
PASSENGER'S
DRIVER'S
PASSENGER'S
RESTRAINT
REARFRONTTAPE
CIGAR
FRONT
POWERPOWER
SEATSEAT
SYSTEM
ASHTRAY
ASHTRAY
PLAYER
LIGHTER
CIGAR
TELEPHONE
PROGRAM
WINDOW
WINDOW
HEATERHEATER
CONTROL
LIGHT
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LIGHTLIGHT
LIGHTER
EJECTBOX
SWITCH
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MODULE
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G201
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Page 542 of 759
ELE-58
ELECTRICAL
WIRING
DIAGRAMS
1
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CASSETTE
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1997
318ti
(2
of
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WIPER/
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BODYCRASH
WASHER
ON-BOARD
CONTROL
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CONTROLMODULECOMPUTER
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JAMB
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DRIVER'S
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MAP
FRONTFRONT
SUNROOF
WASHER
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MAKEUP
ABSSIIP
SIDE
CONTROL
WINDOW
HANDLE
CONTROL
READING
FOOTWELL
FOOTWELL
CONTROL
INTERVAL
MIRROR
WINDOW
MIRROR
CONTROL
MODULE
MIRROR
SWITCH
MOTOR
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LIGHT
LIGHT
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MOTOR
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RECIRC-
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BOX
ENGINE
POSITION
PEARCONTROLBLOWER
SWITCH
CONTROL
ULATION
CONTROL
TEMPERATURE
WHEEL
LIGHT
HAZARD
H000
INDICATOR
BLOWERDEFOGGER
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MOTOR
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SWITCHSWITCH
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DRIVER'S
PASSENGER'S
DRIVER'S
PASSENGER'S
RESTRAINT
WIPER/WIPER/
TAPE
CIGAR
FRONT
POWERPOWER
SEATSEAT
SYSTEM
WASHERWASHER
PLAYER
LIGHTER
CIGAR
TELEPHONE
ABC
PROGRAM
I
WINDOWWINDOW
HEATERNEATER
CONTROL
SWITCH
MODULE
LIGHT
LIGHT
LIGHTER
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BOX
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G302
G302
.303
Page 545 of 759
104444
IBRN
Ground
Distribution
1998
318ti
(2
of
3)
BRN
ml
>-
G201
ELECTRICAL
WIRING
DIAGRAMS
ELE-61
WIPER/
CRUISE
BODY
CRASHBOARD
WASHER
CONTROL
ELECTRONICS
CONTROLCOMPUTER
MODULE
ACTUATOR
CONTROL
CLUTCHMODULE
(BC-LOW)
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11)
(TEMPOMAT)
MODULE
SWITCH
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CONTROL
SEATBACK
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CRUISECONTROL
INSTRUMENT
MODULE
TEMPERATURE
¢O
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DIGITAL
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SWITCH
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MODULE
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SENSOR
CLOCK
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CONTROL
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READING
LEFT
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WIPER/
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POWERPOWER
SEATSEAT
SYSTEM
WASHERWASHER
FRONT
CIGAR
ABC
PROGRAM
WINDOW
WINDOW
HEATERHEATER
CONTROL
SWITCH
MODULE
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LIGHTER
SWITCH
SWITCH
SWITCH
SWITCH
SWITCHSWITCH
MODULE
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G201
G302
G302
G303
Page 560 of 759
ELE-76
ELECTRICAL
WIRING
DIAGRAMS
1
87279
SOLIDSTATE
SOLENOIO
VALVE
(RUNNING
LOSSES)
(1995
ONLY)
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1995
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(PBS/AS
C)
Page 563 of 759
GRN/VIO
HOT
IN
RUNAND
START
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FILM
AIR
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OXYGENSENSOR
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1996-971
.91-(2
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EVAPORATIVE
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VALVEVALVE
ELECTRICAL
WIRING
DIAGRAMS
ELE-79
EXCEPT
1997
318
ti
INSTRUMENT
CLUSTER
SYSTEM
EXCEPT
31811
INTAKEAIR
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CYL3-4
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Page 564 of 759
ELE-80
ELECTRICAL
WIRING
DIAGRAMS
88893
UNLOADER
RELAY
TERMINAL
IS
(1997
ONLY)
VARIABLE
CAMSHAFT
CONTROL
VALVE
1
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