1997 SUBARU LEGACY ignition

BRAKES
[ABS
5
.31
TYPE]
[T7B121
4-4d

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

7B8
CHECK
PROJECTIONAT
ABSCM&H/U
.

1)
Turn
ignition
switch
to
OFF
.

2)
Check
for
broken
projection
at
the
ABSCM&H/U
termi

nal
.

CHECK
:
Are
the
projection
broken?

,res
:
Go
to
step
7139
.

No
:
Replace
ABSCM&H/U
.

-,
,

00000
~
o
00000
a
oooo1
~oo
oi
"
ooo~~

IIII
`'84M1237A

0

F2

B4M1236A
I

F2

5
4
320
9
1
8
1
7
1
6
1
190
80
7
0
6
~
5
413211

]L

B4M1236A

171319
I
CHECK
ABSCM&H/U
.

Measure
resistance
between
ABSCM&H/U
terminals
.

Terminals

No
.
21
-
No
.
23
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

vES
:
Go
to
step
7810
.

No
:
Replace
ABSCM&H/U
.

7810
CHECK
WIRING
HARNESS
.

Measure
resistance
between
connector
(F2)
and
chassis

ground
.

Connector
&
terminal

(F2)
No
.
9
-
Chassis
ground
:

CHECK
:
Is
the
resistance
less
than0
.5
S2?

vES
:
Go
to
step
7811
.

No
:
Repair
harness
.

7811
CHECK
WIRING
HARNESS
.

1)
Connect
connector
to
ABSCM&H/U
.

2)
Measure
resistance
between
connector
(F2)
and
chas-

sis
ground
.

Connector
&
terminal

(F2)
No
.
9
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

YES
:
Go
to
step
7812
.

No
:
Repair
harness
.

POOR
CONTACT
IN
ABSCM&H/U
7812

1
CONNECTOR
.
CONNECTOR
.

CHECK
:
Is
there
poor
contact
in
ABSCM&HlU
connec-

tor?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>

,rES
:
Repair
connector
.

No
:
Replace
ABSCM&H/U
.

27

BRAKES
LABS
5
.31
TYNCJ
Lncs1
'4-ta

7
.
Diagnostics
Chart
for
ABS
Warning
Light
Circuit
and
Diagnosis
Circuit
Failure

Diagnosisconnector
--J

1-

\~
--~

31

--L
Diagnosis
terminas

S2

B4MOSOOA

7C1
CHECK
DIAGNOSIS
TERMINAL
.

Measure
resistance
between
diagnosis
terminals
(B81)

and
chassis
ground
.

Terminals
Diagnosis
terminal
(A)
-
Chassis
ground
:

Diagnosis
terminal
(B)
-
Chassis
ground
.

E
CHECK
:
Is
the
resistance
less
than
0
.5
fl?

C~
;-E-~s
:
Go
to
step
7C2
.

No
:
Repair
diagnosis
terminal
harness
.

CHECK
DIAGNOSIS
LINE
.

1)
Turn
ignition
switchto
OFF
.

2)
Connect
diagnosis
terminal
to
diagnosis
connector

(B82)
No
.
6
.

3)
Disconnect
connector
from
ABSCM&H/U
.

4)
Measure
resistance
between
ABSCM&H/U
connector

and
chassis
ground
.

Connector
&
terminal

(F49)
No
.
4
-
Chassis
ground
:

CHECK
:
Is
the
resistance
less
than0
.5
S2?

,rES
:
Go
to
step
7C3
.

No
:
Repair
harness
connector
between
ABSCM&H/U

and
diagnosis
connector
.

POOR
CONTACT
IN
ABSCM&H/U
7C3

1
CONNECTOR
.
CONNECTOR
.

CHECK
:
Is
there
poor
contact
in
ABSCM&HI
U
connec-

tor?
<
Ref
.
to
FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Replace
ABSCM&H/U
.

29

BRAKES
[ABS
5
.31
TYPE]
[TSE2]4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

D

S2
B4MOSO6E

OUTBACK
model

Front
Rear

1
2
2
1

D

84M
1036C

Except
OUTBACK
model

1
2

-
L
Vq
f
1

B4MO807E

OUTBACK
model

Front
Rear

2
1

D

_v
B4M1037C

$E1
CHECK
ABS
SENSOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Disconnect
connector
from
ABS
sensor
.

3)
Measure
resistance
of
ABS
sensor
connector
terminals
.

Terminal

Front
RH
No
.
1
-
No
.
2
:

Front
LH
No
.
1
-
No
.
2
:

Rear
RH
No
.
1
-
No,
2
:

Rear
LHNo
.
1
-
No
.
2
:

CHECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

,rES
:
Go
to
step
8E2
.

No
:
Replace
ABS
sensor
.

8E2
I
CHECK
BATTERY
SHORT
OF
ABS
SENSOR
.

1)
Disconnect
connector
from
ABSCM&H1U
.

2)
Measure
voltage
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
1
(+)
-
Chassis
ground
(
)
:

Front
LH
No
.
1
(+)
-
Chassis
ground
(
)
:

Rear
RH
No
.
1
(
+)
-
Chassis
ground
(
)
:

Rear
LH
No
.
1
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
the
voltage
less
than
1
V?

vES
:
Go
to
step
8E3
.

No
:
Replace
ABS
sensor
.

33

4-4d[T8E3]
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

M112

L
V
21
B4MOB07E

OUTBACK
model

Front
Rear

1
2
DI
2
1

D

_v
-_
B4M1037C

8E3
I
CHECK
BATTERY
SHORT
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
to
ON
.

2)
Measure
voltage
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
1
(+)
-
Chassis
ground
(
)
:

Front
LHNo
.
1
(+)
-
Chassis
ground
(
)
:

Rear
RH
No
.
1
(+)
-
Chassis
ground
(-)
:

Rear
LH
No
.
1
(+)
-
Chassis
ground
(
)
:

CHECK
:
Is
the
voltage
less
than
1
V?

vES
:
Go
tostep
8E4
.

No
:
Replace
ABS
sensor
.

ETWEEN
8E4
CHECK

ABSCM&H
U
AND,ABS
SENSOR
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
connector
to
ABS
sensor
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminals
.

Connector
&
terminal

Trouble
code
21
/
(F49)
No
.
11
-
No
.
12
:

Trouble
code
23
/
(F49)
No
.
9
-
No
.
10
:

Trouble
code
25
l
(F49)
No
.
14
-
No
.
15
:

Trouble
code
27
l
(F49)
No
.
7
-
No
.
8
:

CHECK
:
Is
theresistance
between
0
.8
and
1
.2
kSZ?

vES
:
Go
to
step
8E5
.

No
:
Repair
harness/connector
between
ABSCM&H/U

and
ABS
sensor
.

34

BRAKES
[ABS
5
.31
TYPE]
[r8E71
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

F49

B4M
1240A
'I

f
CHECK
BATTERY
SHORT
OF
HARNESS
.

Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
21
I
(F49)
No
.
11
(+)
-
Chassis
ground

Trouble
code
23
l
(F49)
No
.
9
(+)
-
Chassis
ground

Trouble
code
25
l
(F49)
No
.
14
(+)
-
Chassis
ground

Trouble
code
27
/
(F49)
No
.
7
(+)
-
Chassis
ground

(-)
:

CHECK
:
Is
thevoltageless
than
1
V?

ves
:
Go
to
step
8E6
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

18E6
I
CHECK
BATTERY
SHORT
OFHARNESS
.

1)
Turn
ignition
switch
to
ON
.

2)
Measure
voltage
between
ABSCM&H/U
connector
and

chassis
ground
.

Connector
&
terminal

Trouble
code
21
/
(F49)
No
.
11
(+)
-
Chassis
ground

Trouble
code
23
l
(F49)
No
.
9
(+)
-
Chassis
ground

Trouble
code
25
l
(F49)
No
.
14
(+)
-
Chassis
ground

Trouble
code
27
/
(F49)
No
.
7
(+)
-
Chassis
ground

CHECK
:
Is
the
voltage
less
than
1
V?

ves
:
Go
to
step
8E7
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

8E7
CHECK
INSTALLATION
OF
ABS
SENSOR
.

Tightening
torque
:

32
f
10
N~m
(3
.3
f
1
.0
kg-m,
24
f
7
ft-Ib)

CHECK
:
Are
the
ABS
sensor
installation
bolts
tight-

ened
securel
y?

vES
:
Go
to
step
8E8
.

No
:
Tighten
ABS
sensor
installation
bolts
securely
.

35

BRAKES
[ABS
5
.3i
TYPE]
[T8E13]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

D
L
S2

B4M0818E

OUTBACK
model

Front
Rear

1
2
J
T~
2
1
L
2

B4M1042C

CHECK
GROUND
SHORT
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
to
ON
.

2)
Measure
resistance
between
ABS
sensor
and
chassis

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LH
No
.
1
-
Chassis
ground
:

Rear
RH
No
.
1
-
Chassis
ground
:

Rear
LHNo
.
1
-
Chassis
ground
:

CHECK
:
Is
the
resistance
more
than
1
MS2?

,rES
:
Go
to
step
8E12
.

No
:
Replace
ABS
sensor
and
ABSCM&H/U
.

CHECK
GROUND
SHORT
OFHARNESS
.

1)
Turn
ignition
switch
to
OFF
.

2)
Connect
connector
to
ABS
sensor
.

3)
Measure
resistance
between
ABSCM&H/U
connector

terminal
and
chassis
ground
.

Connector
&
terminal

Trouble
code
21
I
(F49)
No
.
11
-
Chassis
ground
:

Trouble
code
23
l
(F49)
No
.
9
-
Chassis
ground
:

Trouble
code
25
I
(F49)
No
.
14
-
Chassis
ground
:

Trouble
code
27
/
(F49)
No
.
7
-
Chassis
ground
:

CHECK
;
Is
the
resistance
more
than
1
MS2?

,rES
:
Go
to
step
8E13
.

No
:
Repair
harness
between
ABSCM&H/U
and
ABS

sensor
.

Replace
ABSCM&H/U
.

(CHECK
POOR
CONTACT
IN
CONNECTORS
.

CHECK
:
Is
there
poor
contact
in
connectors
between

ABSCM&HIU
and
ABS
sensor?
<
Ref
.
to

FOREWORD
[T3C1]
.*10
>

vES
:
Repair
connector
.

No
:
Go
to
step
8E14
.

37

4-4d
[Tsis1
BRAKES
[ABS
5
.31
TYPE]

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

8100
~
F1

98
7
6543
2
3
2
11
1918
76
5141
1211
1
45678

0

0
20
Hz

Standard
outputvoltage
:
0
.12
-
1
V
(When
it
is
20Hz
.)
134M
1242A

815
1
CHECK
ABS
SENSOR
SIGNAL
.

1)
Raise
all
four
wheels
of
ground
.

2)
Turn
ignition
switch
OFF
.

3)
Connect
theoscilloscope
to
the
connector
(F1)
or
con-

nector
(B100)
.

4)
Turn
ignition
switch
ON
.

5)
Rotate
wheels
and
measure
voltage
at
specified
fre-

quency
.

NOTE
:

When
this
inspection
is
completed,
the
ABS
control
mod-

ule
sometimes
stores
the
trouble
code
29
.

Connector
&
terminal

Trouble
code
22
l
(B100)
No
.
12
(+)
-
No
.
13
(-)
:

Trouble
code
24
l
(8100)
No
.
3
(+)
-
No
.
4
(-)
:

Trouble
code
26
l
(F1)
No
.
4
(+)
-
No
.
5
(-)
:

Trouble
code
28
l
(F1)
No
.
1
(+)
-
No
.
2
(
)
:

Specifiedvoltage
:
0
.12
-
1
V
(When
it
is
20
Hz
.)

CHECK
:
Is
oscilloscope
pattern
smooth,
as
shown
in

figure?

,rss
:
Go
to
step
819
.

No
:
Go
to
step
816
.

816
CHECK

ORTONE

CONTAM
WHEELINATION
OF
ABS
SENSOR

Remove
disc
rotor
or
drum
from
hub
in
accordance
with

trouble
code
.

NECK
:
Is
the
ABS
sensor
pole
piece
orthetone

wheel
contaminated
by
dirt
or
other
foreign

matter?

ves
:
Thoroughly
remove
dirt
or
other
foreign
matter
.

No
:
Go
to
step
817
.

817
CHECK

ONE
WHEEL
.

GEOF
ABS
SENSOR
OR

CHECK
:
Are
there
broken
or
damaged
in
the
ABS

sensor
pole
piece
orthe
tone
wheel?

,res
:
Replace
ABS
sensor
or
tone
wheel
.

No
:
Go
to
step
818
.

42

BRAKES
[ABS
5
.3i
TYPE]
[T8110]
4-4d

8
.
Diagnostics
Chart
with
Trouble
Code
by
ABS
Warning
Light

Except
OUTBACK
model

1
2

0

S2
B4MOSO6E

OUTBACK
model

Front
Rear

1
22
1

D

84M
1036C

Except
OUTBACK
model

1
2

L
j
134M0818E

OUTBACK
model

Front
Rear

1
2
2
1

D

L
-_
B4M1042C

818
1
CHECK
HUB
RUNOUT
.

Measure
hub
runout
.

CHECK
:
Is
the
runout
less
than
0
.05
mm
(0
.0020
in)?

vES
:
Go
to
step
819
.

No
:
Repair
hub
.

819
I
CHECK
RESISTANCE
OF
ABS
SENSOR
.

1)
Turn
ignition
switch
OFF
.

2)
Disconnect
connector
from
ABS
sensor
.

3)
Measure
resistance
between
ABS
sensor
connector
ter-

minals
.

Terminal

Front
RH
No
.
1
-
No
.
2

Front
LHNo
.
1
-
No
.
2
:

Rear
RH
No
.
1
-
No
.
2
:

Rear
LHNo
.
1
-
No
.
2

CHECK
:
Is
the
resistance
between
0
.8
and
1
.2
kS2?

Go
to
step
8110
.

No
:
Replace
ABS
sensor
.

18110
1
CHECK
GROUND
SHORT
OF°
ABS
SENSOR
.

Measure
resistance
between
ABS

ground
.

Terminal

Front
RH
No
.
1
-
Chassis
ground
:

Front
LHNo
.
1
-
Chassis
ground
.

Rear
RH
No
.
1
-
ChassisgrQUndr

Rear
LH=
No
.
1
-
Chassis
ground
:

se-near
and
chassis

oHEOK
:
Is
the
resistance
more
than
1
MO?

,rES
:
Go
to
step
8111
.

No
;:
Replace
ABS
sensor
.

43