air temperature sensor BMW 325i 1994 E36 Service Manual

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

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

721
Airbag
System
(SRS)

Airbag
Systems
.......
.
...
.
.
.
.
.
....
.
.
.
.
721-1

AIRBAG
SENSORS
AND
ELECTRONICS
721-2

SRS
Warning
Light
and
Fault
Display
.
.
.
.
.
..
721-2

Airbagcontact
ring,
replacing
........
.
.
.
.
.
721-3

Airbag
crash
sensor,replacing
..
.
....
.
...
.
721-4

ZAE
control
module,
replacing
.
.
.
.........
721-5

GENERAL

This
repair
group
covers
only
removal
and
installation
of
air-
bag
components
.
Airbag
system
repair
and
fault
diagnosis
is
not
covered
here
.
Diagnostics,
component
testing,
and
airbag
system
repair
should
be
carried
out
by
trained
BMW
service
technicians
.

NOTE-

Special
test
equipment
is
required
to
retrieve
SRS
fault
codes,
diagnose
system
faults,
and
resetltum
off
the
SRS
indicator
light
.
The
SRS
indicator
light
will
remain
on
until
any
problem
has
been
corrected
and
the
fault
memory
has
been
cleared
.

When
servicing
cars
equipped
with
SRS,
the
precautions

on
this
page
mustbeobserved
to
prevent
personal
injury
.

Airbag
Systems

The
airbag
system
installed
on
E36
cars
through
the
1993
model
year
consisted
of
a
single
airbag
in
the
steering
wheel
.
This
systemcan
be
identified
by
the
orange
crash
sensors
lo-
cated
on
the
front
wheel
wells
and
the
absence
of
a
passenger
side
airbag
.

The
ZAE
airbag
system,
starting
in
model
year
1994
(pro-
duction
date9/93
and
later),
provides
both
a
driver
side
and
a
passenger
sideairbag
.
On
ZAE
vehicles,
the
crash
sensorsare
integrated
into
the
airbag
control
module,
located
under
thecenter
of
the
rear
seat
.
The
ZAE
control
module
triggers

deployment
of
the
airbags
When
it
sensos
the
vehicle
deceler-
ating
at
a
rate
equivalent
to
a
head-on
collisionof
at
least
13
mph
(18
km/h)
.

In
some
1997
4-door
models
and
all
1998
models,
side-impact
airbags
were
installed
in
the
front
doors
.
The
airbag
units
are

mounted
behindthe
door
trim
panels
.
Caution
mustbeused

when
working
on
vehicle
systems
in
the
proximity
of
air
bags,
such
as
the
steering
column,
the
dashboard,
or
the
doors
.

AIRBAG
SYSTEM
(SRS)



721-1

GENERAL
.
.
.
.
.
.
.
.
.
.
.......
.
......
.
.
.
.
721-1



Front
side-impact
airbag
crash
sensor,
removing
and
installing
....
.
.....
.
.....
.
721-5

AIRBAGS



..............
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
721-5

Driver
side
airbag,
removing
and
installing
.
.
.
721-5

Passenger
side
airbag,

removing
and
installing
..............
.
.
.721-6

Front
side-impact
airbag,
removing
and
installing
.
.
.
.
.
.
.
.
.
.
......
.721-7

WARNING
-

"
Airbag(s)
are
inflated
byan
explosive
device
.
Handled
improperly
or
without
adequate
safe-
guards,
the
System
can
be
very
dangerous
.
Spe-
cial
precautions
must
be
observed
prior
to
any
work
ator
near
the
driverside
airbag,
the
passen-
ger
side
airbag
(where
applicable)
or
the
side-im-
pact
airbags
(where
applicable)
.

"
The
airbag
is
a
vehicle
safety
system
.
Serious
in-
jury
may
result
if
System
service
is
attempted
by
persons
unfamiliar
with
the
BMW
SRS
and
its
ap-
proved
service
procedures
.
BMW
advises
that
all
inspection
and
service
be
performed
by
an
autho-
rized
BMW
dealer
.

"
Always
disconnect
the
battery
and
cover
the
neg-
ative
()
battery
terminal
with
an
insulator
before
startingdiagnostic,
troubleshooting
or
service
worknot
associated
with
SRS,
and
before
doing
any
welding
on
the
car
.

"
If
an
airbag
has
been
activated
due
to
an
acci-dent,
BMW
specifies
that
SRS
components
be
replaced
.
For
more
information
on
post-collision
SRS
service,
see
an
authorized
BMW
dealer
.

"
Do
not
allow
the
airbag
unit
to
come
in
contact
with
cleaning
solutions
orgrease
.
Never
subject
an
airbag
unit
to
temperatures
aboye
212°F
(100°C)
.
When
reconnecting
the
battery,
no
per-
son
should
be
inside
the
vehicle
.

"
Always
place
an
airbag
unitthat
has
been
re-
moved
from
its
packaging
with
the
padded
sidefacing
upward
.
Do
not
leave
an
airbag
unlt
unat-
tended
.

"
!f
the
airbag
unit
or
airbag
control
modulehas
been
dropped
froma
height
of
!
1
2
meter
(1
Y2
ft.)
ormore,
theairbag
unit
should
not
be
installed
.

Aírbag
system
components
are
shown
in
Fig
.
1.

GENERAL

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)
MODULE
SWITCH
SWITCH
SWITCH
r



i
F-
,1
-
7
F
-
,
F-
,
F
-
,
F
-
,
F-
,
F-
,
F-
,
F-
,
F
-
,
F-
,I
i
I
i
I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



,



,



I



I



I



I



,



I



I



I



I



I



I



v
I



J



!
._I



L-1



L-1



L-1



L-1



L-1



I



_I



L-1



L-1



L-1



L-1



L-1

J
/-
4L

PASSENGER'S
DOOR
CD



JAMB
CHANGER
m
I



SWITCH

v

I
IIIII
F-
,
F-
,
F-
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I
I



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I



I

ELECTRICAL
WIRING
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



I



MODULE
(TEMPOMAT)



MODULE



(LOW
11)



(BC-LOW)



(TEMPOMAT)



MODULE



SWITCH

I
i
I
i



I
i



I
F



i



I
i



I
i



I
i



F-
,



I
i



F-

L
I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



I



II



_I



!
_I



!
_I



I
_____J



_I



!
_I



!
_I



L-1



L-1



!
_I

12
INCLUS
ERT



ZI



TR(
WS11)



0
1



MODULE



2I



T
MSENSORURE



2I



CLOCK
I



I~



I



I



mm
m



m~
I



I



M~
I



I



m~
I



I~



I



I



m~
I



I

I
_
I



I



I
-)



I



I



I



CONNECTOR



I



,



-
I



I



I



-
I



I



_I



I



I
_I



I



I
_I
(1996)

FRESH
INTEGRATED
CLIMATE



AIR/
HEATING/



GLOVE



HEADLIGHT/
TRANSMISSION
CONTROL
IRKS
RECIRC-
CLIMATE
EVAPORATORTEMPERATURE
BOX
ANTI-



FOGLIGHT
ENGINE
POSITION
BLOWER
SWITCH
CONTROL
ULATION
CONTROLTEMPERATUREWHEEL



LIGHTTHEFT



HAZARD
CLEANING
HOOD
INDICATOR
MOTOR
ILLUM
SWITCH
MOTOR
MODULE
SENSOR
SWITCHSWITCH
HORN



SWITCH
MODULE
SWITCH
LIGHT
I



1



I



1



I



1



I



i



I



i



I



1



I



1



I



i



I



i



I
-
i



I
-
i



I



i



I



1
I



I



I



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I
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I
!
I
!
iI
_I
!
I
INOT
!
_I



I



I



I



I



!



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USED)



I



!



I



!



I



!



I

=1
-
Y
-Y



Y
=1
Y
=Y
Y



~r
Y
YY
-Y

BEN

SUPPLEMENTAL
CASSETTE
FRONT



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
LIGHT
LIGHTLIGHT
LIGHTER
EJECTBOX
SWITCH



SWITCH
SWITCHSWITCH
SWITCH
MODULE

BEN
-1
G201

7

G302
1

W/ONBOARDCOMPUTER

II
F
-,
I
I1
-
7
F-
1
I



I



I



I



I



I



I



I



I
_I



L
-I



L
-I



L
_I



L
I

1
G303

Ground
Distribution

1997
318ti
(1
of
3)

HEADLIGHT/RIGHTRIGHT



RIGHT



LEFTLEFT



LEFT

89159

FOGLIGHT
LOW
HIGH
RIGHT
ANTI-
DOUBLE



RIGHT
FRONT
AUXILIARY
LEFT
LOW
HIGH



LEFT
FRONT
WASHER



BEAM



BEAM



PARK



THEFT
TEMPERATUREPRESSURE
FOG



TURN



FAN



PARK



BEAM



BEAM



LEFT



FOG



TURN



RIGHT
PUMP
LIGHTLIGHTLIGHT
HORN
SWITCHSWITCH
LIGHTLIGHT
MOTOR
LIGHT
LIGHTLIGHT
HORN
LIGHT
LIGHT
HORN
I
-
i



I



i



I



i



I



i



I



1



1



I



1



I



i



I



i



I
-
1



I



1



I



i



I



i



I



1



I



1



I



i



I



1
I



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I



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!
_I



!
_I



!
_I



!
_I



L
__I



L
.-I



L-1



L
-I



L
-I



L-1



!
_I



L
-I



L
-I



L
-I



L
-I



L
-I

TT
T
-T
T
=

I
/--

G100
IGNITION



CRANKSHAFT
OOR



I
POSITIONSH
ELD



_



SENSOR
SHIELDHALL
TRANSMISSION



EFFECT



HOTFILM



CYLINDER
1



CYLINDER2



CYLINDERS



CYLINDER/
ENGINECONTROL



CONTROL



CAMSHAFT
UNLOADER
AIRMASS
IGNITIONIGNITIONIGNITIONIGNITION
MODULE(DME)



CRANKSHAFT
MODULE(EGS)



SENSOR
RELAYMETER
COILCOILCOILCOIL
II



POSITION



r



I



I
I



I
1



I
I



I



I
SENSOR



I
I
I
I



I
___)SHIELD



I



I
DATA



I
I



II



II



I



I



I
I



I

ELECTRICAL
WIRING
DIAGRAMS
ELE-57

__w_
+
f



__-
_a--f-*
-r__-_*____-

1
G103
1
G131
(1908)

RIGHT



LEFT
FRONT



LEFT
RIGHT



BRAKE
STARTER
HIGH
LOW



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