SUBARU LEGACY 1996 Service Repair Manual
Page 161 of 2890
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T5M1]
5-5b
5
.
Diagnostics
Chart
with
Trouble
Code
1.
Airbag
main
harness
Inspection
M
:
TROUBLE
CODE
43
DIAGNOSIS
:
*
Airbag
main
harness
circuit
(Driver)
is
shorted
to
power
supply
.
Airbag
module
harness
(Driver)
is
shorted
to
power
supply
.
"
Roll
connector
is
shorted
to
power
supply
.
"
Airbag
control
module
is
faulty
.
CAUTION
:
Before
performing
diagnostics
on
airbag
system,
turn
ignition
switch
"OFF",
disconnect
battery
ground
termi-
nal
and
thenwait
at
least
20
seconds
.
After
20
seconds
elapse,
remove
instrument
panel
lower
cover,
and
disconnect
(AB3)
and
(AB8),
(AB9)
and
(AB10)
.
1
.
AIRBAG
MAIN
HARNESS
INSPECTION
1)
Disconnect
connector
(AB6)from
airbag
control
mod-
ule
<
Ref
.
to
5-5
[W6A0]
.*2>,
and
connect
it
to
test
har-
ness
132
connector
(8B)
.
2)
Connect
battery
ground
cable
and
turn
ignition
switch
"ON"
(engine
off)
.
3)
Measure
voltage
across
each
test
harness
132
connec-
tor
(5B)terminal
and
chassis
ground
.
CHECK
:
Connector
&
terminal
(5B)
No
.
1
(+)
-
Chassis
ground
(
)
:
Is
voltage
less
than
1
V?
YES
.
G
o
tonext
CHECK
No
:
Replace
airbag
main
harness
.
CHECK
:
Connector&
terminal
(58)
No
.
14
(+)
-
Chassis
ground
(-)
:
Is
voltage
less
than
1
V?
vES
:
Replace
airbag
control
module
.
No
:
Replace
airbag
main
harness
.
31
Page 162 of 2890
5-5b
[T5NO]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
5
.
Diagnostics
Chart
with
Trouble
Code
1
.
Double
lockinspection
for
connectors(AB1)
and
(B31)
2
.
Inspection
of
body
harness,
connector
and
airbag
warning
light
1
3
.
Grounding
circuit
inspection
B31
ABi
~~>`
1,~\
1
ti
BSM0122B
N
:
AIRBAG
WARNING
LIGHT
REMAINS
ON
.
DIAGNOSIS
:
"
Airbag
warning
light
is
faulty
.
"
Airbag
control
module
to
airbag
warning
light
harness
circuit
is
shorted
or
open
.
"
Grounding
circuit
is
faulty
.
"
Airbag
control
module
is
faulty
.
"
(AB1)
and
(B31)
arenot
connected
properly
.
CAUTION
:
Before
performing
diagnostics
on
airbag
system,
turn
ignition
switch
"OFF",
disconnect
battery
ground
cable
and
then
wait
at
least
20
seconds
.
1
.
DOUBLE
LOCK
INSPECTION
FOR
CONNECTORS
(AB1)
AND
(B31)
1)
Remove
front
pillar
lower
trim
(Driver
side)
.
2)
Check
double
lock
of
connectors
(AB1)
and
(B31)
.
CHECK
:
Is
there
poor
contact
in
double
lock
of
con-
nectors
(A81)
and
(831)?
Repair
poor
contact
in
double
lock
of
connect
o
(A131)
and
(B31)
.
No
:
Go
to
step
2
.
32
rs
Page 163 of 2890
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T5N2]
5-5b
5
.
Diagnostics
Chart
with
Trouble
Code
B31
1A
5A
r
.~
..
,fl((
i
1
23
45B
7
89
101
.112131415
761718
I
B5M0123B
i
1
2
31
5
8789
[
lo
l
l1
1
12
1
13
1
14
1
15
1
16
1
17
1
.
t18
20
i
G5M0559
I
2
.
INSPECTION
OF
BODY
HARNESS,
CONNECTOR
AND
AIRBAG
WARNING
LIGHT
1)
Turn
ignition
switch
"OFF"
and
connect
body
harness
connector
(B31)
to
test
connector
A
connector
(1A)
.
2)
Connect
battery
ground
cable
and
turn
ignition
switch
"ON",
(engine
off)
and
connect
connectors
(3A)
and
(4A)
.
CHECK
;
Does
the
airbag
warning
light
come
off?
,rES
:
Go
tostep
3)
.
Go
tonext
~
.
~K
:
Is
there
anything
unusual
to
body
harness?
Repair
body
harness
.
Replace
airbag
warning
light
module
1~
.
NOTE
:
After
problem
has
been
eliminated,
disconnect
connectors
(3A)
and
(4A)
.
3)
Turn
ignition
switch
"OFF",
disconnect
battery
ground
cable
and
then
wait
at
least
20
seconds,
and
re-connect
connectors
(AB1)
and
(B31)
.
4)
Remove
instrument
panel
lower
cover
and
disconnect
(AB3)
with
(AB8),
then
disconnect
connector
(AB6)from
airbag
control
module,
<
Ref
.
to
5-5
[W6A0]
.*2
>
and
connect
it
to
test
harness
132
connector
(8B)
.
5)
Connect
battery
ground
cable
and
turn
ignition
switch
"ON,"
(engine
off)
and
connect
connectors
(6B)
and
(7B)
.
CHECK
:
Does
the
airbag
warning
light
come
on?
0
:
Go
to
step
3
.
No
:
Replace
airbag
main
harness
.
NOTE
:
After
problem
has
been
eliminated,
disconnect
connectors
(6B)
and
(7B)
.
33
Page 164 of 2890
5-5b
[T5N3]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
5
.
Diagnostics
Ch
art
with
Trouble
Code
B31
1A
-
;
1F°9'
--------
5A
.
~fffl
1
1
1
2
1
3
1
45
6
78
\
9
1017
12
131415161718
e
BSM0123B
i
12
1
3
1
4
5
6789
(011121314151617181920
GSM0559I
3
.
GROUNDING
CIRCUIT
INSPECTION
1)
Turn
ignition
switch
"OFF",
disconnect
battery
ground
cable
and
then
wait
atleast
20
seconds
.
Disconnect
con-
nector
(AB1)
from
body
harness
connector
(B31),
and
connect
connector
(B31)
to
test
harness
A
connector
(1A)
.
Measure
resistance
between
connector
(5A)
terminal
and
chassis
ground
.
CHECK
:
Connector&
terminal
(5A)
No
.
17
(+)
-
Chassis
ground
(
)
:
Is
resistance
less
than
10
S2?
,mss
:
Go
to
next
CHECK
No
:
Repair
body
grounding
circuit
.
CHECK
:
Connector&
terminal
(5A)
No
.
18
(+)
-
Chassis
ground
(
)
:
Is
resistance
less
than
10
S2?
Go
to
step
2)
.
No
:
Repair
body
grounding
circuit
.
2)
Connect
connectors
(AB1)
and
(B31)
.
Disconnect
con-
nector
(AB6)from
airbag
control
module
<
Ref
.
to
5-5
[W6A0]
.*2>,
and
connect
it
to
test
harness
B2
connec-
tor
(8B)
.
3)
Measure
resistance
between
each
test
harness
B2
con-
nector
(5B)
terminal
and
chassis
ground
.
CHECK
;
Connector
&
terminal
,rES
:
Replace
airbag
control
module
.
No
:
Replace
airbag
main
harness
.
(5B)
No
.
11
(+)
-
Chassis
ground
(
)
:
Is
resistance
less
than
10
S2?
YES
.
G
o
to
next
CHECK
No
:
Replace
airbag
main
harness
.
CHECK
;
Connector&
terminal
(58)
No
.
12
(+)
-
Chassis
ground
(
)
:
Is
resistance
less
than
10
S2?
34
Page 165 of 2890
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
Page 166 of 2890
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
Page 167 of 2890
5-5b
[TSPO]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
5
.
DiagnosticsChart
with
Trouble
Code
P
:
WARNING
LIGHT
INDICATES
TROUBLE
CODE,
THEN
NORMAL
CODE
.
-
FLASHING
TROUBLE
CODE
.
-
DIAGNOSIS
:
Airbagsystem
component
parts
are
faulty
.
1
.
Airbag
component
parts
appearance
inspection
1
2
.
Airbag
component
parts
vibration
inspection
1
3
.
Showering
Inspection
to
body
CAUTION
:
Beforeperforming
diagnostics
on
airbag
system,
turn
ignition
switch
"OFF",
disconnect
battery
ground
cable,
and
thenwait
at
least
20
seconds
.
38
Page 168 of 2890
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T5P1]
5-5b
5
.
Diagnostics
Chart
with
Trouble
Code
1
.
AIRBAG
COMPONENT
PARTS
APPEARANCE
INSPECTION
1)
Conduct
on-board
diagnostic
and
call
up
trouble
codes
stored
in
memory
.
<
Ref
.
to
[T4B0]
.*2>
2)
Select
trouble
code
required
to
check
airbag
compo-
nent
parts
from
those
listed
in
table
and
reproduce
symp-
tom
.
Trouble
codes
Check
parts
Refer
to
5-5
:
Airbag
module
(Passenger)
W3A2
Sri
04*
Airbag
main
harness
W5A0
*1
Airbag
control
module
W6A0
tr2
e
Fuse
No
.
8
T5D3
Sri
11
*
Airbag
main
harness
W5A0
*1
Airbag
control
module
W6A0
x`r2
Body
harness
-
Roll
connector
W7A0
*2
9
Airbag
module
(Driver)
W3A1
x`ri
12
Airbag
main
harness
W5A0
Sri
Airbag
control
module
W6A0
*2
Airbag
module
(Driver)
W3A1
Sri
o
Roll
connector
W7A0
*2
13
Airbag
main
harness
W5A0
*1
Airbag
control
module
W6A0
*2
21
e
Airbag
control
module
W6A0
*2
Airbag
module
(Passenger)
W3A2*1
22
9
Airbag
main
harness
W5A0
Sri
Airbag
control
module
W6A0*2
33
*
Airbag
control
module
W6A0
x`r2
Airbag
main
harness
W5A0
*1
34*
Airbag
module
(Passenger)
W3A2
*1
Airbag
control
module
W6A0*2
Airbag
module
(Driver)
W3A1
Sri
9
Roll
connector
W7A0
ir2
41
r
Airbag
main
harness
W5A0
Sri
Airbag
control
module
W6A0*2
Airbag
module
(Passenger)
W3A2
Sri
42
*
Airbag
main
harness
W5A0
*i
Airbag
control
module
W6A0*2
Airbag
module
(Driver)
W3A1
*1
e
Roil
connector
W7A0
*2
43
Airbag
main
harness
W5A0
x`ri
Airbag
control
module
W6A0
*2
39
Page 169 of 2890
5-5b
[T5p2]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
5
.
Diagnostics
Chart
with
Trouble
Code
v
4U
G5M0461
I
3)
Conduct
appearance
inspection
on
parts
selected
.
CHECK
:
Is
there
anything
unusualabout
the
appear-
ance
of
airbag
component
parts?
ves
:
Replace
faulty
airbag
component
parts
.
No
:
Go
to
step
2
.
NOTE
:
Also
check
connector
terminals,
wiring
harness,
case,
etc
.
for
damage
.
2
.
AIRBAG
COMPONENT
PARTS
VIBRATION
INSPECTION
1)
Gently
shake
check
parts
(to
determine
faults
.)
.
2)
To
check
airbag
module
or
roll
connector,
turn
and
tilt
steering
wheel
CAUTION
:
Do
not
shake
or
vibrate
airbag
control
module
.
CHECK
:
Does
the
component
malfunction
again
when
shaking?
Replace
faulty
airbag
component
parts
.
No
:
Go
to
step
3
.
3
.
SHOWERING
INSPECTION
TO
BODY
Spray
water
on
vehicle
body
.
CAUTION
:
Do
not
directly
spraywater
on
airbag
components
.
CHECK
:
Does
water
leak
into
the
passenger
compart-
ment
when
showering
vehicle?
Replace
faulty
airbag
component
parts
.
No
:
Clear
memory
.
NOTE
:
Also
check
wiring
harnesses
as
water
may
leak
along
them
and
get
airbag
component
parts
wet
.
40
Page 170 of 2890
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T5(a1]
5-5b
5
.
Diagnostics
Chart
with
Trouble
Code
Q
:
WARNING
LIGHTINDICATES
TROUBLE
CODE,
THEN
NORMAL
CODE
.
-
FLASHING
NORMAL
CODE
.
-
DIAGNOSIS
:
"
Airbag
connector
is
faulty
.
"
Fuse
No
.
16
is
blown
.
"
Airbag
.
main
harness
is
faulty
.
"
Airbag
control
module
is
faulty
.
"
Body
harness
is
faulty
.
1
1
.
Airbag
connector
appearance
inspection
1
2
.
Atrbag
connector
vibration
inspection
3
.
Showering
inspection
to
body
4
.
Fuse
No
.
16,
airbag
main
harness,
airbag
control
module,
body
harness
appearance
inspection
5
.
Fuse
No
.
16,
airbag
main
harness,
body
harness
vibration
inspection
1
6
.
Showering
inspectionto
body
1
7
.
Warning
light
illumination
check
CAUTION
:
Before
performing
diagnostics
on
airbag
system,
turn
ignition
switch
"OFF",
disconnect
battery
ground
cable,
and
then
wait
at
least
20
seconds
.
1
.
AIRBAG
CONNECTOR
APPEARANCE
INSPECTION
Conduct
appearance
inspection
on
airbag
connectors
(AB2)
through
(AB8)
.
<
Ref
.
to
5-5
[T100]
.*2
>
CHECK
:
Is
thereanything
unusualabout
the
appear-
ance
of
connectors(AB2)
through
(AB8)?
,rES
:
Replace
faulty
airbag
component
parts
.
No
:
Go
to
step
2
.
NOTE
:
Check
terminals,
case
and
wiring
harnesses
for
damage
.
41