check engine SUBARU LEGACY 1996 Service Owner's Manual

SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T502]
5-5b

5
.
Diagnostics
Chart
with
Trouble
Code

O
:
AIRBAG
WARNING
LIGHT
REMAINSOFF
.

DIAGNOSIS
:

"
Fuse
No
.
15
is
blown
.

"
Body
harness
circuit
is
open
.

"Airbag
warning
light
is
faulty
.

"
Airbag
main
harness
is
faulty
.

"Airbag
control
module
is
faulty
.

1
1
.
Fuse
No
.
15inspection

1
2
.
Body
harness
inspection

3
.
Airbag
warning
light
module
(in
combination

meter)
inspection

1
4
.
Airbag
main
harness
Inspection

CAUTION
:

Before
performing
diagnostics
on
airbag
system,
turn

ignition
switch
"OFF",
disconnect
battery
ground

terminal,
and
then
wait
at
least
20
seconds
.

1
.
FUSE
No
.
15
INSPECTION

Remove
and
visually
check
fuse
No
.
15
.

CHECK
;
Is
fuse
No
.
15
blown?

(]
ES
:
Replace
fuse
No
.
15
.

If
fuse
No
.
15
blows
again,
go
to
step
2
.

No
:
Go
to
step
2
.

2
.
BODY
HARNESS
INSPECTION

Turn
ignition
switch
"ON"
(engine
off)
to
make
sure
other

warning
lights
(in
combination
meter)
illuminate
.

CHECK
:
Do
all
the
warning
lights
(in
combination

meter)
except
airbag
warning
light
come
on?

vES
:
Go
to
step
3
.

No
:
Repair
body
harness
.

35

5-5b
(T503]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)

5
.
Diagnostics
Chart
with
Trouble
Code

B31

AB1

r
`,~~,
;
r
:cr

B5M01228

0)0
0

J
J

AB

B8

.
.o/

G5M0312

3
.
AIRBAG
WARNING
LIGHT
MODULE
(IN

COMBINATION
METER)
INSPECTION

1)
Turn
ignition
switch
"OFF",
disconnect
battery
ground

cable
and
then
wait
at
least
20
seconds
.

2)
Disconnect
body
harness
connector
(B31)
fromcon-

nector
(AB1),

3)
Connect
battery
ground
cable
and
turn
ignition
switch

"ON"
(engine
off)
to
make
sure
airbag
warning
light
illu-

minates
.

CHECK
:
Does
the
airbag
warning
light
come
on?

vss
:
Go
to
step
4
.

Replace
airbag
warning
light
module

4
.
AIRBAG
MAIN
HARNESS
INSPECTION

1)
Turn
ignition
switch
"OFF",
disconnect
battery
ground

cable
and
then
wait
atleast
20
seconds
.

2)
Connect
body
harness
connector
(B31)
and
connector

(AB1)
.

3)
Disconnect
connectors
(AB3)
and
(AB8)
below
steering

column
.
<
Ref
.
to
5-5[M2-6]
.*1
>

4)
Disconnect
connector
(AB6)
from
airbag
control
mod-

ule
.
<
Ref
.
to
5-5
[W6A0]
.*2
>

5)
Connect
battery
ground
cable
and
turn
ignition
switch

"ON"
to
make
sure
airbag
warning
light
illuminates
.

CHECK
:
Does
the
airbag
warning
light
come
on?

Replace
airbag
control
module
.

No
:
Replace
airbag
main
harness
.

36

SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T5G17]
5-5b

5
.
Diagnostics
Chart
with
Trouble
Code

v
0
v

GSM0461

5
.
FUSENo
.
16,
AIRBAG
MAINHARNESS,
BODY

HARNESS
VIBRATION
INSPECTION

Conduct
vibration
inspection
on
fuse
No
.
16,
airbag
main

harness
and
body
harness
.

CAUTION
:

Do
not
shake
or
vibrate
airbag
control
module
.

CHECK
:
Do
fuse
No
.
16,
airbag
main
harness
or
body

harness
malfunction
again
when
shaking?

Replace
faulty
airbag
component
parts
.

No
:
Go
to
step
6
.

NOTE
:

Gently
shake
each
part
.

6
.
SHOWERING
INSPECTION
TO
BODY

Spray
water
on
vehicle
body
.

CAUTION
:

Do
not
directly
spraywater
on
each
part
.

CHECK
:
Does
wafer
leak
into
the
passenger
compart-

ment
when
showering
vehicle?

,res
:
Replace
faulty
airbag
component
parts
.

No
:
Go
to
step
7
.

NOTE
:

If
leaks
are
noted,
check
wiring
harnesses
as
water
may

leak
along
them
and
get
parts
wet
.

7
.
WARNING
LIGHT
ILLUMINATION
CHECK

Turn
ignition
switch
"ON"
(engine
off)
and
observe
airbag

warning
light
.

CHECK
:
Does
the
airbag
warning
light
comes
on
for
8

seconds,then
go
out
and
stay
out?

,rES
:
Clear
memory
.

Go
to
[T4E0]*2
"DIAGNOSTICS
PROCEDURE"
.

43

s-$
[D601]
WIRING
DIAGRAM

6
.
Wiring
Diagram

No
.
Load

MB-2
Powerwindow
circuit
breaker

Engine
control
module

Fuel
pump
relay
MB-3
Main
relay

OBD-II
service
connector

MB-4A/C
relay
holder

MB-6
Headlight
LH

Diode
(Lighting)

Lighting
switch

Combination
meter
M
B_$

Headlight
RH

Combination
meter

Door
lock
timer

MB-9
Luggage
room
light

Radio

Room
light

MB-10
A/C
relay
holder

ALT-1
Combination
meter

IG
A/C
relay
holder

Cruise
control
module

ST
Engine
control
module

Inhibitor
switch

FB-2
Diode
(A/C)

Sub
fan
motor
FB-3
Sub
fan
relay-2

Engine
control
module

Fuel
pump
relay
FB-4
Ignition
coil

Transmission
control
module

Side
marker
light
LH
FB-6
Side
marker
light
RH

FB-7Door
lock
timer

FB-9Hazard
switch

AT
shift
lock
control
module
FB-10
Key
warning
switch

Power
antenna

FB-11
Radio

FB-12
Cigarette
lighter

FB-13
Remote
control
rearview
mirrorswitch

AT
shift
lock
control
module

Combination
switch
Front
washer
motor
FB-14
Front
wipermotor

Rear
washer
motor

Rear
wipermotor

Rear
wiper
relay

FB-15Transmission
control
module

Na
Load

Rear
defogger

FB-16
Rear
defogger
condenser

Reardefogger
switch

FB-17
Rear
defogger
switch

FB-18
AT
shift
lock
control
module

Inhibitor
switch

FB-19
Hazard
switch

Combination
meter
FB-20
Mode
control
panel
FB-21
Combination
meter
(Airbag)

Blower
motor
relay

Check
connector

FB-22
FRESH/RECIRC
actuator

Mode
actuator

Powerwindow
relay

Seat
belt
timer

FB-23
Airbag
.
control
module

FB-24
Airbag
control
module

FB-25
Lighting
switch

FB-26
Parking
switch

FB-27
Parking
switch

FB-28
Illumination
light

FB-29
Illumination
light

FB-30
Stop
light
switch

Stop
&
brake
switch

FB-31
Horn
relay

FB-32
Blower
motor
relay

FB-33
Parking
switch

License
plate
light
LH

License
plate
light
RH

FB-34
Rear
combination
light
LH

Rear
combination
light
RH

Rear
finisher
light
LH

Rear
finisher
light
RH

FB-35
Cruise
control
main
switch
Cruise
control
module

WIRING
DIAGRAM
[D605]
6-3

6
.
Wiring
Diagram

FWD
switch
(AWD)

B9

Data
link
connector

B78

OBD-11
service
connector

840

Droppig
Cruise
resistorcont
rol
modu
le

Check
connector

nP
B79
~
B4
~
B94

0E

o
L
-
-
-
------------------------
-

4
-~
C
-
-------------'---------_
_1'
H
0
U

c0
-
,
F
LO
N

B11
T4
1Ref
.
to
/Engine
F-
r
electrical
system
.

AT
contro
l
--'-'-"----

Veh
i
c
l
e
speed
i(Transmission)
___
.---------
-
--
sensor
1

ATF
temperature
sensor
Linepressuresolenoid

Lock-up
solenoid

AWD
solenoid

Shift
solenoid
1

Shift
solenoid
2

Shift
solenoid
3

a
:
B54

b
:
855

c
:
BSb
R
R
3
Throttleposition

She!
I
d
point
n,
821
E2

sensor

El3
connector
B84
B53
~-
--
-
-

contro
II
89
(BI
ac
k)
1
O
(Gray)
E13
(Brown)
B53B78
(Ye
II
Ow)
m
od
ule
1
~
F172-1
3
4
2
12
123
1234
56789

B54
(B
I
ac
k)
B79
(Grey)
B55
(B
I
ac
k)
B40
(Gray)

123456
789101112
1
23
4
67
8
910
1112
11
13
1
14
r,
1
1
1
2
1
3
1
4
1
5
161
7
1
8
1
910111213141516

12345678

910111213141516

(BD
(Gray)
(B
I
ack)
856894
(B
I
ack)
884
(L
i
ght
b
I
ue)

12
34
56
78
9l0
lll2
1314
1516
11181920212223242526272829303132333435363738394041424344

1
2
J3141
56789
10
4546474849
051
1
52
1
53
1
54
1
5
515
6
1
57'
58
4
60
6162
6364656667b8
b970

13142116
I1
1213141516171814
20
7172
73747576
7178
79
80
182
3
8586B7888990
9192
93
949596

BUR41-02B

11

6-3
[Dso131
WIRING
DIAGRAM

6
.
Wiring
Diagram

Combination
meter

Tachometer
i10
:a

-

110
OD
:
b

Malfunction
i14
I:
c
indicator
~}g
lamp

Speedometer
circuit

ill

Main
relay
o
B47
Twisted
wire

0

B46
E
Fuel
pump
relay

13
.
ENGINE
ELECTRICAL
SYSTEM

To
Power
Supply
Routing
FB-20
~
MB-3
~
FB-4
~
ST
FB-22
Check

FUSENa
15
SBF-2
FUSE
Na
l6IGSW
FUSE
W
15
connector
a
v
B79

,~l,,I
F45

u
B62(2
837

i3
B3B

S
.
M
.
J
.
[Referto
foldout
page
.]

R58R57Rt5

Fuel
M
Y

pump

E
Inhibitor
switch

Bl2
B97817

RI

Vehicle
speed
sensor
2

B17
(B
I
ac
k)
i
tl
B46
(Green)
R15
(B
I
ac
k)
R58

12
1
2
123
12
12334
3456
456

(
2D
(Light
gray)
110
i
l2
(L
I
ght
gray)

1
1
1
2
1
3
1
4
1
5
1
6
M78
9
1
10
1
11
1
12
1
D
1
1234567891011113141516

rnrnmvo~
v
.»ov
.0m
.OMPPmM
.Oh
l~

Enginecontro
I
B84
module

B47
(Brown)
(g
)(Gray)

1
2
1
23
4
31
45
67
85
1
69
1
16N1
1
12
1
-

(
ED

B79
(Gray)

1
23
4567
89
1
10
1112
1314

t2(3
(B
rown)

234789
12345
678910
l
'
1
11
1
1
2l3l4151617181920~~
lll2(31415t6L71819202122

BUR10-02A

12

WIRING
DIAGRAM
[Dsoso1
6-3

6
.
Wiring
Diagram

30
.
SRS
(AIRBAG
SYSTEM)

To
PowerSupply
Routing

FB-21

FUSE
Na
15

FB-23

FUSE
No
.8

FB-24
~

FUSE
Na
16

FB-22

FUSE
No
.15

Combination

m

t
r
te
Alrba
c
I
rcu7t
7A

I
nf
I
ator
4~
43)

Or
1
ver
side)
Inflator
(Passenger
g3~
side)

AB2
~
l

AB7
AB3
AB1-0

A88A89

AB6

i3
B38

Diagnosis
terminal

E

-
Ref-to
Engine
electrical
system
.

B79R

Checkconnector

BB2
-C17Diagnosis
'-CC~7
connector

O
:
A(rbagcord

Airbag
control
module

Drive
r
Cl
Electric
circui
t
_
ear
memory
sensor
G-sensor
Warning
Ii
g
ht
Die
nosi5
Impact
module
sensing
'
cricui

ConstantConstant
Back-upcurrent

-

currentSafety
cap
.citor
drive
circuit

T

drive
circuit
sensor

-6~

Booster

il3
B82
(B
I
ac
k)
831
(Ye
II
ova
879
(Grey)
i3
(Brown)

1
2
123
t
23
4567
1
345
6789L0
1
234
3456
1
4
151
6
1
78
910
1(1
1314
11121314116171819202122

BU86-02

17

r
Connecting
to

)r
Area
No
.
Name

C-4
D1
Front
doorcord
RH

ow
C-4
ABi
SRS
(Airbag)
harness

;k
C-4
Turn
&
hazard
module

.k
C-3
i1

C-3
i2
instrument
panel
wiring

un
C-3
i3
harness

e
C-3
i4

y
C-3
OBD-IIservice
connector

C-3
Power
window
circuit
breaker

C-3
Power
window
relay

;k
C-3
Illuminationcontrol
module

C-3
Seat
belt
timer

;n
B-4
Fuel
pump
relay

vn
B-4
Main
relay

;k
B-4
Horn
relay

B-4
Blower
relay

y
C-4
FIB
y
C-4
B-3
Shield
joint
connector
(AT)

.k
B-3

:k
B-3
Transmission
control
module

.k
B-3

:k
B-3
Shift-lock
control
module

B-4F44
i
h
B-4F45
Front
w
ring
arness

.k
B-3
Stop
light
switch

,k
B-3
Stop
8
brake
switch
(Withcruise
control)

:k
8-3
Cruise
control
sub
switch

Connector
Connecting
to

No
.
Pole
Color
Area
No
.
Name

869
11
Black
C-3

B70
9
C-3
Combination
switch

B71
8
8-3

B72
6
Black
C-3
Ignition
switch

B73
2
Black
B-3
Key
lock
solenoid

B74
2
Black
B-3
Key
warning
switch

B75
2
Green
B-2
876
T
d
B76
2
Green
8-2
875
e
connector
est
mo

877
7
B-2
Mode
actuator

B78
9
Yellow
B-2
Data
link
connector

B79
14
Gray
C-2
Check
connector

BBO
4
Blue
B-2
i20
Instrument
panel
wiring
harness

B81
1
x
2
B-2
Diagnosis
terminal
(Ground)

B82
6
Black
B-2
Diagnosisconnector

BB3
4
C-1
Shield
joint
connector
(EIG)

BBQ
96Lightblue
C-2
Engine
control
module

B85
4
Brown
B-3
Diode
(Lighting)

B86
4
Black
B-1
Blower
motor
resistor

887
2
Black
B-1
Blower
motor

888
3
Black
B-1
Evaporatorthermoswitch

B90
2
Green
B-4
R50
Room
light
cord

B91
5
B-1
FRESHIRECIRC
actuator

B92
8
B-1
Door
lock
timer

894
20
Black
B-1
Cruise
control
module

B97
56
B-4
R1
Rear
wiring
harness
(S.M
.J
.)

B101
24
B-1
D11
Front
door
cord
LH

8111
3
Gray
C-4FIB

`
:
Non-colored

4
.
BULKHEAD
WIRING
HARNESS
(IN
COMPARTMENT)

1
I
2
I
3
I
4

A

B

C

D

1
I
2
I
3
I
4

[oeo41

B6M0513A

A

B

C

iJ

23

Connector
Connecting
to

No
.
Pole
Color
Area
No
.
Name

830
24
C-4
D1
Front
door
cord
RH

831
7
Yellow
C-4
A81
SRS
(Airbag)
harness

B32
3
Black
C-4
Turn
&
hazard
module

B36
22
Black
C-3
i1

B37
22
C-3
i2
Instrument
panel
wiring

B38
22
Brown
C-3
i3
harness

B39
20Blue
C-3
i4

B40
16
Gray
C-3
OBD-II
service
connector

B41
2
C-3
Power
window
circuit
breaker

842
4
C-3
Power
window
relay

B43
6
Black
C-3
Illumination
control
module

B44
8
C-3
Seat
belt
timer

B46
4
Green
B-4
Fuel
pump
relay

B47
6
Brown
B-4
Main
relay

B49
3
Black
B-4
Horn
relay

850
4
B-4
Blower
relay

851
11
Gray
C-4
FIB
B52
12
Gray
C-4

853
4
B-3
Shield
joint
connector
(AT)

B54
12
Black
B-3

B55
16
Black
B-3
Transmission
control
module

B56
20
Black
B-3

B57
12
Black
B-3
Shift-lock
control
module

861
B
B-4
F44

B62
20
B-4
F45
Front
wiring
harness

B64
2
Black
B-3
Stop
light
switch

B65
4
Black
B-3
Stop
&
brake
switch(Withcruise
control)

B68
5
i
Black
i
B-3
Cruise
control
sub
switch

Connector
Connecting
to

No
.
Pole
Color
Area
No
.
Name

B69
11
Black
C-3

B70
9
C-3
Combination
switch

B71
8
8-3

B72
6
Black
C-3
Ignition
switch

B73
2
Black
B-3
Key
lock
solenoid

B74
2
Black
B-3
Key
warning
switch

B75
2
Green
B-2
B76

B76
2
Green
&2
B75
Test
mode
connector

B77
7
B-2
Made
actuator

B78
9
Yellow
B-2
Data
link
connector

B79
14
Gray
C-2
Check
connector

B80
4
Blue
B-2
i20
Instrumentpanel
wiring
harness

B81
1
x
2
B-2
Diagnosis
terminal
(Ground)

B82
6
Black
B-2
Diagnosis
connector

B83
4
C-1
Shield
joint
connector
(E!G)

884
96
Light
blue
C-2
Engine
control
module

885
4
Brown
B-3
Diode
(Lighting)

B86
4
Black
B-1
Blower
motor
resistor

887
2
Black
B-1
Blower
motor

B88
3
Black
8-t
Evaporator
thermoswitch

890
2
Green
B-4
R50
Room
light
cord

B91
5B-1
FRESHIRECIRC
actuator

892
8
B-1
Door
lock
timer

B94
20
Black
B-1
Cruise
control
module

B97
56
B-4
R1Rear
wiring
harness
(S
.M
.J
.)

B101
24
B-1
D11
Front
doorcord
LH

13111
3
Gray
C-4
FIB

`
:
Non-colored

4
.
BULKHEAD
WIRING
HARNESS
(IN
COMPARTMENT)

A

B

C

1]

4

23

3-2
[vi-1101
AUTOMATIC
TRANSMISSION
AND
DIFFERENTIAL

7
.
DiagnosticChart
with
Trou
ble
Code

7
.
Diagnostic
Chart
with
Trouble
Code

H
:
TROUBLE
CODE
22

-
MASS
AIR
FLOW
SIGNAL
-

DIAGNOSIS
:

Input
signal
circuit
of
TCM
from
ECM
is
open
or
shorted
.

1
.
Check
trouble
code
onengine
side
.
Not
OK
<
Ref
.
to
2-7
On-Board
Diagnostics
II
System

[T10B0]
.*2
>

OK

2
.
Check
harness
connector
between
TCM
and
Not
OK
ECM
.

OK

3
.
Check
input
signal
for
TCM
.
Not
OK
OK

Clear
memory
->
Confirmation
test-+
Not
OK
->

Repair
TCM
connector
terminal
poor
contact
.
~
Check
for
cause
of
trouble
in
engine
.

Repair
TCM
connector
terminal
poor
contact
.
~
*
Replace
TCM
.

854

TCM

B54
O

9
10
Ill
12
1314
U
15163132
3343536373839
OG14243G4
123456
V
1
59
~
0
~
1
1
6
4
63
~
46$6
~
7
1
6
6970
J
11
7
1
8
1
9
1
10
1
11
1
12
1
4
5687
99091923949596

B3M0475
I

1
.
CHECK
TROUBLE
CODE
ON
ENGINE
SIDE
.

Using
Subaru
select
monitor
or
OBD-general
scan
tool,

check
trouble
code
of
mass
air
flow
sensor
on
engine
side
.

4