SUBARU LEGACY 1996 Service Repair Manual

5-5b
[T100]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
1
.
Electrical
Components
Location

1
.
Electrical
Components
Location
Tobodyharness
B31

AB1

'
Airbag
main
Inflater
(Passenger)
harness
~

OCr00

AB10

AB9

AB8
AB3

'`
Roll
connector

AB6
AB7
I
AB2

~J
oc
~o

---

Airbag
control
module

~_,

wish
safety
sensor
Inflater
(Driver)

and
electric
sensor
e5nnoa3sA

Connector
No
.
(AB1)(AB2)(AB3)(AB6)(AB7)(A88)(AB9)
(AB10)

Pole
733123333

Color
YellowYellow
YellowYellowYellowYellowYellow
Yellow

Male/Female
Male
Female
FemaleFemale
MaleMaleMale
Female
I

2

SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
(T2oo)
5-5b

2
.
Schematic

2
.
Schematic

Combination
meter

IG/
SW
R

Z

Z

AB2
AB7AB3AB8

Airbag
control
module

BSM0403A

3

5-5b
[730o]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)

3
.
Tools
for
Diagnostics

3
.
Tools
for
Diagnostics

CAUTION
:

Be
sure
to
use
specified
test
harness
A,
B
or
C
when

measuring
voltage,resistance,
etc
.
of
AIRBAG
system

component
parts
.

A
:
TEST
HARNESS
A

PN
98299PA000

4A
3A
1A

2A

MM
M12

1
A
11
121314
6~h
516171
19
11
nil
11121131141151161171
loon

L
L

R

L

O

1
23
4567

BSM0112A

4

SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T3BO]
5-5b

3
.
Tools
for
Diagnostics

B
:
TEST
HARNESS
B2

PN
98299PA011

15
1413
1
12
1
11
1
10
1
9
1
8
1
7
1
6
1
5
1

21
12
1000

123
456
14
1
7
1
5
1
9
1
19
1
11
1
12
1
151

5B

123456789
1011121314151
17181920

12
12

123
4
5678910111

G5M0593

7B

~5
B
5

$B3B

4B3B

5-5b
[T3CO]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)

3
.
Tools
for
Diagnostics

C
:
TEST
HARNESS
C

PN
98299PA020

2C
1C

3C

1C
2C

cw
''
32
1
123

39
L

3C
,*

1
2

3456

B5M0113A

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

3
.
Tools
for
Diagnostics

D
:
AIRBAG
RESISTOR

The
airbag
resistor
is
used
duringdiagnostics
.
The
airbag

resistor
has
the
same
resistance
asthe
airbag
module
and

thusprovides
safety
when
used
instead
of
the
airbag

module
.
It
also
makes
it
possible
to
finish,
diagnostics
in

less
time
.

7

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

4
.
Diagnostics
Chart
for
On-board
Diagnostic
System

4
.
Diagnostics
Chart
for
On-board

Diagnostic
System

A
:
BASIC
DIAGNOSTICS
PROCEDURE

1)
Airbag
warning
light
comes
"ON"
.

2)
Turn
ignition
switch
to
"ON",
(engine
"OFF")
and
observe
airbag
warning
light
.

3)
If
airbag
warning
light
stays
"ON"
after
8
seconds
or
remains
"OFF",
or
comes
back
"ON"
after
30
seconds,
this
indicates

a
current
problem
.
Proceed
to
step
8)
.

If
airbag
warning
light
comes
"ON"
for
8
seconds,
then
goes
out
and
stays
out,
this
indicates
normalsystem
operation
atthis

time
.
Check
the
memory
for
intermittent
problems
by
performing
the
procedure
outlined
in
[T4B0)tr2
"ON-BOARD

DIAGNOSTICS"
.
Proceed
to
step
4)
.

4)
If
trouble
code
indicated,
<
Ref
.
to
[T4D1]*2
-
[T4D2]
.*2>
proceed
to
step
5)
.

If
normal
code
indicated,
<
Ref
.
to
[T4D2]
.
>
proceed
to
step
6)
.

5)
Repairand
replacement,
<
Ref
.
to
[T5P1]
.*2>
proceed
to
step
7)
.

6)
Repair
and
replacement,
<
Ref
.
to
[T5Q1]
.*2>
proceed
to
step
7)
.

7)
Turn
ignition
switch
"ON",
(engine
"OFF")
and
observe
airbag
warning
light
.
If
airbag
warning
light
stays
"ON"
after
8

seconds
or
comes
back
"ON"
after
30
seconds,
proceed
to
step
8)
.

If
airbag
warning
light
comes
"ON"
for
8
seconds,
then
goes
out
and
stays
out,
proceed
to
step
9)
.

8)
Repair
and
replacement
.
<
Ref
.
to
[T4E1]
.*2>
Proceed
to
step
10)
.

9)
Clear
memory
.
<
Ref
.
to
[T4C0]
.z`r2>
Proceed
to
step
10)
.

10)
END

SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[T4CO]
5-5b

4
.
Diagnostics
Chart
for
On-board
Diagnostic
System

2

L3141
B5mol
15B

2

33

E
;1
1~3141516
B5M01
16B

B
:
ON-BOARD
DIAGNOSTIC

When
the
airbag
system
isin
functioning
condition,
the

airbag
warning
light
will
remain
on
for
8
seconds
and
go

out
when
the
ignition
switch
is
set
to
ON
.

If
there
is
any
malfunction,
the
airbag
warning
light
will

either
stay
on
or
off
continuously
.
In
such
cases,
perform

on-board
diagnostic
in
accordance
with
the
specified
pro-

cedure
to
determine
trouble
codes
.

1)
Turn
ignition
switch
ON
(with
engine
OFF)
.

2)
ConnectDIAG
.
terminal
T
to
No
.
1
terminal
of
diag-
nosis
connector
~2
located
below
lower
cover
.

3)
Check
in
accordance
with
the
trouble
code
indicated

by
the
AIRBAG
warning
light,
and
record
the
trouble

codes
.

4)
Turn
the
ignition
switch
"OFF"
and
remove
the
DIAL
.

terminal
from
No
.1
terminal
of
diagnosis
connector
.

C
:
CLEAR
MEMORY

After
eliminating
problem
as
per
trouble
code,
clear
mem-

oryas
follows
:

Make
sure
ignition
switch
is
ON
(and
engine
off)
.
Connect

one
DIAL
.
terminal
1Q
on
diagnosis
connector
(Z
termi-
nal
No
.
1
.

While
warning
light
is
flashing,
connect
the
other
DIAL
.

terminal
(Z
on
terminal
No
.
2
for
at
least
three
seconds
.

After
memory
is
cleared,
normal
warning
light
flashing
rate

resumes
.
(Warning
light
flashes
every
0
.6
seconds

ON-OFF
operation
.)
Memory
cannotbe
cleared
if
any

problem
exists
.

After
clear
memory
and
then
DIAG
.
terminals
(1)
and
(3),

extract
from
diagnosis
connector
02
.

9

5-5b
[TaD7]
SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)

4
.
Diagnostics
Chart
for
On-board
Diagnostic
System

D
:
LIST
OF
TROUBLE
CODES

1
.
TROUBLE
CODES

Trouble
code/Contents
of
troubles
Memory
function
Contents
of
diagnosis
Page

1)
Airbag
main
harness
circuit
is
shorted
.

04
Provided
.
2)
Airbag
module
harness
(Ps)
circuit
is
shorted
.
15

3)
Airbag
control
module
is
faulty
.

1)
Airbag
control
module
is
faulty
.

11
Provided
.
2)
Airbag
main
harness
circuit
is
open
.
16
3)
Fuse
No
.
8
is
blown
.

4)
Body
harness
circuit
is
open
.

1)
Airbag
main
harness
circuit
is
open
.

12
Provided
..
2)
Airbag
module
harness
(Dr)
circuit
is
open
.
19
3)
Roll
connector
circuit
is
open
.

4)
Airbag
control
module
is
faulty
.

1)
Airbag
main
harness
circuit
is
shorted
.

13
Provided
.
2)
Airbag
module
harness
(Dr)
is
shorted
.
20
3)
Roll
connector
circuit
is
shorted
.
4)
Airbag
control
module
is
faulty
.

1)
(AB9)
and
(AB10)
arenot
connected
properly
.

2)
(AB2)
and
(AB7)
arenot
connected
properly
.
14
Not
provided
.
3)
(AB3)
and
(AB8)
arenot
connected
properly
.
21
4)
(AB6)
is
not
connected
properly
to
airbag
control
module
.

21
Provided
.
Airbag
control
module
is
faulty
.
23

1)
Airbag
main
harness
circuit
is
open
.

22
Provided
.
2)
Airbag
module
harness
(Ps)
circuit
is
open
.
24

3)
Airbag
control
module
is
faulty
.

1)
Airbag
control
module
is
faulty
.

31
Not
provided
.
21
Airbag
main
harness
circuit
is
open
.
25
3)
Fuse
No
.
16
is
blown
.

4)
Body
harness
circuit
is
open
.

33
Provided
.
Airbag
module
is
inflated
.
27

1)
Airbag
main
harness
circuit
(Ps)
is
shorted
to

power
supply
.

34
Provided
.
2)
Airbag
module
harness
(Ps)
is
shorted
to
power
28

supply
.

3)
Airbag
control
module
is
faulty
.

1)
Airbag
main
harness
circuit
(Dr)
is
shorted
to

ground
.

41
Provided
.
2)
Airbag
module
harness
circuit
(Dr)
is
shorted
to
29

ground
.

3)
Roll
connector
circuit
is
shorted
to
ground
.

4)
Airbag
control
module
is
faulty
.

1)
Airbag
main
harness
circuit
(Ps)
is
shorted
to

ground
.

42
Provided
.
2)
Airbag
module
harness
circuit
(Ps)
is
shorted
to
30
ground
.

3)
Airbag
control
module
is
faulty
.

1)
Airbag
main
harness
circuit
(Dr)
is
shorted
to

power
supply
.

43
Provided
.
2)
Airbag
module
harness
(Dr)
is
shorted
to
power
31
supply
.

3)
Roll
connector
is
shorted
to
power
supply
.

4)
Airbag
control
module
is
faulty
.

10

SUPPLEMENTAL
RESTRAINT
SYSTEM
(ELECTRIC
SENSOR
TYPE)
[TaD2]
5-5b

4
.
Diagnostics
Chart
for
On-board
Diagnostic
System

Trouble
code/Contents
of
troubles
Memory
function
Contents
of
diagnosis
Page

1)
Airbag
warning
light
is
faulty
.

2)
Airbag
control
module
to
airbag
warning
light

Airbag
warning
light
remains
on
.
Not
provided
.
harness
circuit
is
shorted
or
open
.
32
3)
Grounding
circuit
is
faulty
.
4)
Airbag
control
module
is
faulty
.

5)
(AB1)
and
(B39)arenot
connected
properly
.

1)
Fuse
No
.
15
is
blown
.

2)
Body
harness
circuit
is
open
.

Airbag
warning
light
remains
off
.
Not
provided
.
3)
Airbag
warning
light
is
faulty
.
35
4)
Airbag
main
harness
is
faulty
.

5)
Airbag
control
module
is
faulty
.

Warning
light
indicates
trouble
code,

then
normal
code
.
(Flashing
trouble
Provided
.
Airbag
system
component
parts
are
faulty
.
38

code
.)

1)
Airbag
connector
is
faulty
.

Warning
light
indicates
trouble
code,
2)
Fuse
No
.
16
is
blown
.

then
normal
code
.
(Flashing
normal
Not
provided
.
3)
Airbag
main
harness
is
faulty
.
41

code
.)
4)
Airbag
control
module
is
faulty
.

5)
Body
harness
is
faulty
.

[NOTE]
Dr
:
Driver
side
Ps
:
Passenger
side

2
.
HOW
TOREAD
TROUBLE
CODES

TheAIRBAG
warning
light
flashes
a
code
corresponding

to
the
faulty
parts
.

The
long
segment
(1.2
secon)
indicates
a
"ten",
and
the

short
segment
(0
.3
secon)
indicates
a
"one"
.

Example
:

ON
Flashing10
111
p
~
J
~
L
J
1
code
12
:
OFF

1
.2
0
.3
0
.3
0
.3
0
.3
1
2
(Sec)

ON
Flashing
OFF
10
10

70
.3171d
.2
_

11

10
code
21
:

T
12
0
.3
1
.2
0
.3
(Sec)

Flashing
ON

normal
OFF
code
:
1
0
.6
0
.6
(Sec)

85M01
17A

11