SUBARU LEGACY 1996 Service Repair Manual

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

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

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

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

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

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

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

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

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